Entries |
Document | Title | Date |
20080199210 | Developing device - A developing device comprises: a housing that stores developer; a developing roll that is rotatably supported in the housing and has a developing region with a roughened surface that supplies developer to an image region of an image holding member; a step portion that is formed at both sides of the developing region of the developing roll and whose diameter is smaller than that of the developing region; and a seal member that contacts a region of the step portion that is opposite to the image holding member. | 08-21-2008 |
20080205926 | Developing Device and Image Forming Apparatus Including the Same - A developing device includes a cabinet, a developing roller that carries developer, a supply roller for supplying the developer, a developer cartridge that accommodates the developer, a first sealing member that is provided at both ends of the developing roller, a developer passage opening provided in at least one of the cabinet and the developer cartridge, and a second sealing member provided in a vicinity of the developer passage opening. At least a part of the second sealing member overlaps the first sealing member in a direction in which the developer cartridge is attachable to and detachable from the cabinet. A portion of a shadow of the second sealing member cast in a direction, in which the developer passes through the developer passage opening, overlaps the first sealing member. The developer cartridge is attachable to and detachable from the cabinet at a position opposed to the developing roller. | 08-28-2008 |
20080240770 | SEALING MEMBER, SEALING STRUCTURE INCORPORATED IN AN IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS THAT INCORPORATES THE IMAGE FORMING UNIT - A sealing structure is incorporated in an image forming unit. A rotatable body is supported in a housing body. A sealing member extends in a longitudinal direction substantially parallel to the rotational axis of the rotatable body, providing a seal against the surface of the rotatable body. The sealing member includes a first widthwise end portion fixed to the housing body and a second widthwise end portion in contact with rotatable body, having a larger width at a longitudinally middle portion than at longitudinally end portions. The second widthwise end portion includes a widthwise free edge describing an arc such that the width is larger nearer the longitudinally middle portion. The sealing member may include longitudinally end portions and a longitudinally middle portion between the longitudinally end portions, the longitudinally middle portion having a constant width and the longitudinally end portions having a width smaller nearer the longitudinal ends. | 10-02-2008 |
20090022512 | DEVELOPING APPARATUS, IMAGE FORMING APPARATUS HAVING THE SAME, AND ASSEMBLING METHOD OF A DEVELOPING APPARATUS - A developing apparatus usable with an image forming apparatus includes a developer receptacle having a sidewall on which a shaft hole is formed, a rotation shaft having a length shorter than a distance between opposite sidewalls of the developer receptacle and an end on which a connection hole is formed, and a driving member rotatably supported by the shaft hole of the developer receptacle and having a connecting shaft inserted into the connection hole of the rotation shaft. | 01-22-2009 |
20090028599 | DEVELOPER CARTRIDGE AND IMAGE FORMING APPARATUS HAVING THE SAME - A developer cartridge of an image forming apparatus includes a cartridge frame having a developer chamber holding a developer therein, and a developer discharging port, a developer conveying unit rotatably installed on the cartridge frame to agitate and move the developer towards the developer discharging port, and an elastic damper to change the size of a developer discharge space defined by the vicinity to the developer discharging port according to a developer delivery pressure of the developer conveying unit. The damper contracts to increase a size of the developer discharge space and reduce the developer delivery pressure, when the developer delivery pressure increases above a normal pressure in the developer chamber. | 01-29-2009 |
20090087214 | TONER SUPPLY DEVICE AND IMAGE FORMING APPARATUS - A toner supply device includes a toner container, a transport-path forming member, an opening, a shutter member, and a first seal member. The opening is provided at a side wall of the transport-path forming member. The shutter member is movable between a closed position to close the transport path by being inserted in the opening and an open position. The first seal member fills a gap between an inner wall of the opening and the shutter member in a toner transport direction in which the toner is transported through the transport path. When the shutter member is inserted in the opening, the shutter member is elastically deformable in a deformation direction perpendicular to both the toner transport direction and a moving direction of the shutter member, and when the shutter member is not inserted in the opening, the shutter member is wider than the opening in the deformation direction. | 04-02-2009 |
20090097876 | Liquid developing apparatus and image forming apparatus - Provided are a liquid developing apparatus and an image forming apparatus, wherein a high-viscosity liquid developer layer is transferred sequentially from a developer supply member to a developer coating member and to the developer carrying member among rollers, and the developer supply width of the developer supply member is made smaller than the width of the developer coating member and greater than the width of the developer carrying member, whereby an occurrence of the area, at the end portions of the developer carrying member, where the volume of developer is uneven is reduced, and the liquid developer is prevented from wrapping around the end faces of the developer coating member, without making the apparatus complicated. | 04-16-2009 |
20090110430 | SEAL MEMBER, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A seal member covers a space between a developing roller and a casing of a developing device. The seal member includes a flexible sheet and a reinforcing member fixed to the sheet. The reinforcing member is fixed to the casing. Notches are provided in the reinforcing member in a direction perpendicular to the length of the reinforcing member. | 04-30-2009 |
20090154950 | Upper Seal for Inhibiting Doctor Blade Toner Leakage - A seal assembly for inhibiting toner leakage comprises a j-seal received by a developer housing in a toner cartridge. The j-seal has an upper seat portion engagably sealing with a doctor blade seal and a leg for slidably sealing of a developer roll. The upper seat portion has an upper seat inner seal wall and an upper seat outer seal wall spaced apart a preselected distance from said upper seat inner seal wall and defining a gap therebetween. A doctor blade seal engages the upper seat inner and outer seal walls and a doctor blade bracket assembly disposed adjacent the j-seal and the doctor blade seal. The doctor blade seal further has a tongue disposed within the gap for interlocking said j-seal and sealably engaging the doctor blade bracket assembly. | 06-18-2009 |
20090154951 | Developer Roll Lip Seal - A toner seal comprises a j-shaped seal having an upper seat portion and a leg portion, the leg having a front face extending between first and second edges of said leg portion, a lip seal extending along at least one of the first and second edges of the leg, and, the lip seal having a length extending from the upper seat portion along the leg. | 06-18-2009 |
20090154952 | Developing Apparatus, Process Cartridge, and Image Forming Apparatus - A developing apparatus comprises: a housing having an opening that opens towards an image carrier on which an electrostatic latent image is formed, and a developer storing unit in which a developer is stored; a developer carrier that carries the developer stored in the developer storing unit and transports the developer to a developing region in opposition to the image carrier; a partitioning frame arranged in a groove formed between the developer carrier and the developer storing unit of the housing, that is provided with a connecting hole which enables connect between the developer storing unit and the opening; a partition arranged on a side surface of the partitioning frame; and a closely contact section that causes the partitioning frame to closely contact to the groove. | 06-18-2009 |
20090180796 | Image Forming Apparatus, A Developing Device And An Image Forming Method - An image forming apparatus, includes: a latent image carrier that carries an electrostatic latent image; a housing that stores toner inside; a toner carrier roller that is shaped approximately like a cylinder, is mounted to the housing rotatably about a rotational axis, rotates while carrying toner on a surface thereof to convey the toner to an opposed position facing the latent image carrier outside the housing, and is provided, on the surface thereof, with a plurality of convex sections which are regularly arranged in an axial direction parallel to the rotational axis and in a circumferential direction orthogonal to the axial direction and parallel to a circumferential surface of the toner carrier roller and a concave section which surrounds the convex sections; a seal member that is arranged in abutting contact with the surface of the toner carrier roller moving from the outside the housing toward the inside the housing at a position downstream of the opposed position in a rotation direction of the toner carrier roller to prevent toner leakage from the inside the housing; and a moving mechanism that relatively moves the toner carrier roller relative to the seal member in the axial direction. | 07-16-2009 |
20090185819 | Developing Device, an Image Forming Apparatus and an Image Forming Method - A developing device, includes: a housing that stores toner inside; a toner carrier roller that is shaped approximately like a cylinder, is mounted to the housing rotatably about a rotational axis, rotates while carrying the toner on a surface thereof to convey the toner to outside of the housing, and is provided, on the surface thereof, with a plurality of convex sections which are regularly arranged and a concave section which surrounds the convex sections, the convex sections including top surfaces that coincide with a part of a curved surface of single cylinder and have electrical conductivity; and a seal member that is arranged in abutting contact with the surface of the toner carrier roller moving from the outside the housing toward the inside the housing at a position downstream of the opposed position in a rotation direction of the toner carrier roller to prevent toner leakage from the housing, a contact surface of the seal member being made of a material located at a position to charge the toner with a polarity opposite to its charging polarity in triboelectric series. | 07-23-2009 |
20090190952 | Developing Device - A developing device is provided. The developing device includes a housing, a developing agent carrier, and a developing agent leakage prevention member. The developing agent leakage prevention member has a first layer that is configured to contact an outer circumferential surface of a longitudinal end of the developing agent carrier; a second layer that is superimposed on the first layer and is configured to contact a portion of the housing; and an adhesive layer that is interposed between the first layer and the second layer, the adhesive layer partially bonding a first opposing surface of the first layer opposing the second layer to a second opposing surface of the second layer opposing the first layer such that an unbonded area where the first opposing surface and the second opposing surface are not bonded together is produced. | 07-30-2009 |
20090232540 | LASER TONER CARTRIDGE TONER SCATTER PREVENTION SYSTEM AND PROCESS - Systems and methods for preventing and/or inhibiting toner scatter inside of laser printer toner cartridges including a shield that is adjacent to the toner regulating member, extends over and adjacent the developing roller, includes triboelectric material of a polarity corresponding to the polarity of the laser printer cartridge during operation and that functions as a physical barrier and as an electrical barrier to direct toner particles that scatter away from the developer roller back toward the developer roller. | 09-17-2009 |
20090238600 | Developing Apparatus, Process Cartridge, Image Forming Device, and Developer Cartridge - A developing apparatus includes: a housing having an opening that opens towards an image carrier onto which an electrostatic latent image is formed, a developer accommodating unit in which a developer is accommodated, and a connecting hole connecting with the developer accommodating unit; a developer carrier that carries the developer accommodated in the developer accommodating unit and transports the developer to a developing region in opposition to the image carrier; a sheet member that is provided in the developer accommodating unit and seals the continuous hole; and an insertion hole that is formed in the housing and allows the sheet member to be inserted through when the sheet member is pulled out, wherein the insertion hole has a shape having ends which are more distant from the connecting hole than parts of the shape other than the ends. | 09-24-2009 |
20090245851 | DEVELOPING DEVICE FRAME UNIT, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND MANUFACTURING METHOD OF THE DEVELOPING DEVICE FRAME UNIT - A developing device frame unit supporting a regulating member regulating the layer thickness of developer on a developer carrier. The unit includes a frame having a seal forming portion, first and second end seals contactable to the carrier surface to prevent carrier-axial-direction leaking of the developer, and a blade sealer sealing between the regulating member and the frame to prevent developer leaking when the regulating member is mounted. The blade sealer is an elastomer resin material which is injection-molded with a metal mold and in the seal forming portion where the end seals are provided. The blade sealer connects the end seals with each other, and a protrusion provided by a squeezed-out portion of the resin material is provided by injecting, into a space defined by the metal mold, the seal forming portion, and the end seals, a resin material volume larger than a volume of the space. | 10-01-2009 |
20090245852 | TONER SUPPLY DEVICE, DEVELOPING UNIT AND TONER SUPPLY DEVICE REMANUFACTURING METHOD - A toner supply device includes a toner storage tank for storing toner; a toner supply roller for discharging toner; a covering member for covering the top surface of the toner storage tank filled with toner; and a sealing element provided between the toner storage tank and the covering member. | 10-01-2009 |
20090274481 | Developing Unit - A developing unit is provided, which include: a developer carrier; a housing; and a side sealing member disposed between an end part of the developer carrier and a portion of the housing adjacent to a supply port. The side sealing member includes an upstream side seal and a downstream side seal. The upstream side seal is configured to convey a developer on the upstream side seal in an oblique direction toward the supply port and the downstream side. The downstream side seal is configured to convey a developer on the downstream side seal in a direction toward the downstream side. | 11-05-2009 |
20090290900 | Developing Device, Image Forming Apparatus, and Method of Manufacturing Developing Device - A developing device includes: a housing that stores toner therein; a toner carrying roller that is attached to the housing by a shaft and is rotated in a predetermined rotation direction while carrying charged toner on a surface of the toner carrying roller to transport the toner to the outside of the housing; and a seal member that extends in a direction of a rotation axis of the toner carrying roller and has one end fixed to the housing and the other end in contact with the surface of the toner carrying roller to prevent the toner from leaking out of the housing, wherein a plurality of convex portions having top surfaces constituting a part of the same cylindrical surface are formed on the surface of the toner carrying roller, and at least a part of the seal member in contact with the surface of the toner carrying roller is made of a material having a contact angle of 105° or more with respect to water. | 11-26-2009 |
20090290901 | DEVELOPMENT DEVICE - A development device includes an open-ended housing, a rotatable roller, an array of multiple primary electrodes, a voltage source, a sealing member, and a secondary electrode. The housing accommodates toner for application to the photoconductive surface through an end opening thereof. The roller has an outer circumferential surface to deliver the toner from within the housing to a development zone. The array of multiple primary electrodes are aligned with each other on the roller surface. The voltage source applies a periodic pulse voltage to at least a subset of the primary electrodes to generate an oscillating primary electric field. The sealing member seals clearance between the roller surface and an edge of the end opening downstream from the development zone. The secondary electrode generates a secondary electric field to force the toner from the sealing member toward the roller surface to prevent premature removal of the toner. | 11-26-2009 |
20100021199 | MONOLITHIC SEALING MEMBER FOR IMAGE FORMING APPARATUS AND METHOD OF MANUFACTURING THE SAME - A method for manufacturing a monolithic sealing member for an image forming apparatus, and an image forming apparatus having the monolithic sealing member are provided. The method includes applying a foamable polyurethane liquid in a portion of a housing in which three or more surfaces meet, molding the foamable polyurethane liquid in a mold and foaming the polyurethane liquid to obtain a polyurethane foam, and hardening the polyurethane foam. The foamable polyurethane liquid may be a one-pack foamable polyurethane liquid or a two-pack foamable polyurethane liquid. | 01-28-2010 |
20100080607 | DEVELOPER STORAGE CONTAINER AND IMAGE FORMING APPARATUS PROVIDED THEREWITH - To a lower part of a housing | 04-01-2010 |
20100092205 | DEVELOPING DEVICE AND IMAGE FORMING DEVICE - A developing device used for forming a toner image by developing the electrostatic latent image on an electrostatic latent image carrier in an image forming device, comprises a developer carrier roller which is rotationally driven, and a toner thin layer forming member which is brought into contact with the developer carrier roller, wherein the developer carrier roller is formed in the shape of an inverted crown which is concave at the central portion in the direction of the rotation axis, and a starting point of the shape of the inverted crown is positioned further outside in the direction of the rotation axis than toner thin layer region formed by the toner thin layer forming member. | 04-15-2010 |
20100092206 | Developing Device - A developing device includes a developer carrier which carries a developer, a developing unit housing which rotatably supports the developer carrier, a side seal member which comes into slidable contact with both ends of the developer carrier, a sheet-like elongated seal member which extends in the axial direction of the developer carrier so as to come into slidable contact with the developer carrier, a side seal attachment surface which is formed in the developing unit housing and to which the side seal member is attached, and a support portion which is formed in the developing unit housing and protrudes toward the developer carrier from the side seal attachment surface to support the elongated seal member. The elongated seal member is attached onto the support portion in a state where both ends thereof overlap the side seal member and are opposite the side seal attachment surface. A filler is filled in a gap surrounded by the elongated seal member, the side seal member, the support portion, and the side seal attachment surface. A protrusion for suppressing the spread of the filler is formed at the side seal attachment surface at a predetermined interval from the support portion. | 04-15-2010 |
20100129109 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes: an image carrier, a developer carrier configured to carry developer and develop a latent image formed on the image carrier to form a developer image on the image carrier, a developer supplying member being in contact with the developer carrier and configured to supply the developer to the developer carrier, and developer sealing members provided at the ends of the developer carrier and the developer supplying member and configured to seal the developer there-between. One of the developer carrier and the developer supplying member is a belt member stretched between a drive roller and a driven roller. The developer sealing members are in contact with the outer circumferential surface of the belt member. | 05-27-2010 |
20100150603 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A developing device includes: a casing that has a housing part, an upstream edge and a downstream edge, and a rectangular opening that opposes a development region, the rectangular opening being provided between the upstream and downstream edges; a cylindrical developer conveying body to rotate in a state of passing the rectangular opening, the cylindrical developer conveying body conveying the developer to the development region; and a flexible sheet member that has an upstream end part and a downstream end part, the upstream end part being fixed at the downstream edge of the casing, the downstream end part being a free end and coming into contact with a layer of the developer in a rotation axis direction of the developer conveying body at a position of the developer conveying body which passes the downstream edge of the opening. | 06-17-2010 |
20100166452 | Reinforced Doctor Blade Assembly Seal and Printer Cartridge Employing the Reinforced Seal - A reinforced doctor blade assembly seal includes a base strip of a flexible plastic film having a thickness, a surface of predetermined area bounded by multiple edges, and a foldable region extending length-wise between one pair of the multiple edges and spaced from and located intermediately between another pair of the multiple edges. The seal also includes a supplemental strip of a flexible plastic film having a thickness and a surface of predetermined area bounded by multiple edges. The supplemental strip is laminated on the base strip offset from and along one side of the foldable region on the base strip such that the base strip has adjacent laminated and non-laminated portions along opposite sides of the foldable region with the laminated portion having a greater thickness than the non-laminated portion. The seal has an attaching mechanism in the form of an adhesive coating on the non-laminated portion of the base strip. The seal is employed in a printer cartridge. | 07-01-2010 |
20110002708 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS EMPLOYING THE SAME - A developing device has a housing including a toner container containing toner, and a developing unit. The developing unit includes a developing roller and a photoconductive drum, and a barrier member including a toner supply window. The barrier member is combined with the housing to separate the toner container and the developing unit from each other. The developing unit also includes a blocking film that is attached to the barrier member to block the toner supply window. An end of the blocking film is exposed outside the housing through an opening formed in a sidewall of the housing. A bottom surface and first and second side surfaces of the barrier member are attached to a bottom surface and first and second side surfaces of the housing by using a welding process, and a distance between the first and second side surfaces of the barrier member and a distance between the first and second side surfaces of the housing increase from bottom to top. | 01-06-2011 |
20110013929 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A developing device includes a housing containing toner having an opening at a side thereof, a developing roller supplying the toner supplied through the opening to a photoconductive drum, and a regulator contacting the outer circumference of the developing roller to regulate the amount of the toner supplied to the photoconductive drum. The housing also includes a lower frame having both side portions and a lower end portion respectively forming both edges and a lower edge of the opening in a lengthwise direction, and an upper frame welded and coupled to the lower frame and including a leading end portion forming an upper edge of the opening and a recess portion recessed from the leading end portion at both end portions of the leading end portion in the lengthwise direction. Both side portions of the lower frame includes a first surface contacting the recess portion to prevent the upper frame from being pushed toward the developing roller when the upper frame is welded and coupled to the lower frame. | 01-20-2011 |
20110064453 | DEVELOPMENT DEVICE AND IMAGE FORMING DEVICE HAVING THE SAME - A development device includes a casing storing development agent, a developing member that is rotatably supported in an opening of the casing and configured to hold development agent thereon, a first seal member that extends in a first direction parallel to a rotational axis of the developing member and has a base end at a side of the casing and a free end contacting an entire length, in the first direction, of the developing member, and an elastic member disposed between the casing and the free end so as to face the entire length, in the first direction, of the developing member. The elastic member presses the free end against the entire length, in the first direction, of the developing member. | 03-17-2011 |
20110064454 | DEVELOPMENT DEVICE AND PRINTER HAVING THE SAME - A development device has a casing configured with a first frame and a second frame. The first frame includes attachment surfaces to which a regulating member is attached. A facing surface of the second frame is disposed between the attachment surfaces, in a predetermined plane including the attachment surfaces, and configured to face a portion of the regulating member between the attachment surfaces. A seal member is disposed between the regulating member and opposite surfaces including the attachment surfaces and the facing surface, and configured to seal first gaps each of which is formed between the facing surface and one of the attachment surfaces, in a first direction parallel to a rotational axis of a developing member rotatably supported by the casing. | 03-17-2011 |
20110176828 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A developing device includes a toner storage area containing toner, a developing portion in which a developing roller is installed, and a housing including a toner supply window to connect the toner storage area and the developing portion. A pair of rails is disposed on the toner supply window to extend in a lengthwise direction of the developing roller, and a blocking member including a blocking portion is provided to open and close the toner supply window when the blocking member is removed from and inserted into the pair of rails from outside of the housing, respectively. | 07-21-2011 |
20110200353 | DEVELOPING DEVICE AND PROCESS CARTRIDGE - A developing device includes a developing container, provided with an opening, for containing a developer; a developing roller, provided at the opening, for forming a developer image on an image bearing member; a seal member, provided at the opening along an end portion of the developing roller, for preventing toner leakage from a gap between the opening and the developing roller; and a developer supplying roller, including a core material and a cylindrical elastic member which is provided around the core material and is contacted to the developing roller, for supplying the developer to the developing roller. The cylindrical elastic member has an end surface and a central portion with respect to a longitudinal direction thereof. The end surface has an outer diameter larger than that of the central portion so as to be in non-contact with the seal member. | 08-18-2011 |
20110236057 | Developing Apparatus, Process Cartridge and Image Forming Apparatus - A developing apparatus comprising: a housing; a developing roller; a seal member, and a layer thickness regulating member that contacts a circumferential surface of the developing roller via developer and regulates a thickness of a developer layer on the circumferential surface of the developing roller, wherein the seal member has a sliding contact portion made of fiber having elasticity and sliding-contacting the circumferential surface of the developing roller, wherein the layer thickness regulating member has one end portion that is supported by the housing and the other end portion to which a bent portion is formed to face the seal member, and wherein the bent portion is configured to enter the sliding contact portion. | 09-29-2011 |
20110236058 | Developing Device - A developing device including a first frame including first welding surface and a second frame including second welding surface, wherein the first frame and the second frame are welded so that the first welding surface and the second welding surface are opposite to each other, and wherein the developing device further including: a seal member that is adhered to a first adhesion surface of the first frame and a second adhesion surface of the first frame, wherein the seal member covers a first side end portion from a first side in a orthogonal direction at a opposite part, where the first welding surface and the second welding surface are disposed opposite one another; and a filling agent that is filled between the seal member and the first side end portion in the orthogonal direction at the opposite part. | 09-29-2011 |
20110255897 | DEVELOPING DEVICE - A developing device includes a developer carrying member for carrying a magnetic developer to form a developer image on an image bearing member; a developing device frame including a first accommodating chamber for accommodating the magnetic developer and including a second accommodating chamber, in which the developer carrying member is provided, for accommodating the magnetic developer supplied from the first accommodating chamber through a first opening; a removable sealing member for sealing the first opening; and a magnetic seal, provided between a longitudinal end portion of the developer carrying member and the developing device frame. The sealing member is removable through a second opening which is defined at least partly by the magnetic seal. | 10-20-2011 |
20110286762 | DEVELOPING DEVICE, PROCESS CARTRIDGE, REMANUFACTURING METHOD FOR DEVELOPING DEVICE AND PROCESS CARTRIDGE - A remanufacturing method for a developing device and a process cartridge includes a dismounting step of dismounting a regulating member from a development frame member, a cleaning step of cleaning a blade sealing member, and a mounting step of mounting the regulating member to the development frame member after the cleaning step. | 11-24-2011 |
20110311266 | DEVELOPER SUPPLY DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A developer supply device is provided, which includes side seal members each of which is disposed to extend across a casing-side facing portion of a casing and a supporting-member-side facing portion of a board supporting member, the casing-side facing portion and the supporting-member-side facing portion facing one of both ends of a developer carrying surface in a first direction, the developer carrying surface being a cylindrical circumferential surface of a roller main body which surface is formed parallel to the first direction to carry development agent thereon. Each of the side seal member is configured to slide in contact with one of both ends of the developer carrying surface in the first direction while filling in a gap between the casing and one of both ends of the roller main body in the first direction. | 12-22-2011 |
20120057897 | Developing Device - A developing device is provided which includes a developer carrier configured to carry developer and rotate, a developing frame configured to rotatably support the developer carrier, and a seal member disposed between the developing frame and an end portion of the developer carrier in an axial direction of the developer carrier. The seal member includes a base and a mesh textile disposed on top of the base and configured to contact the developer carrier. The mesh textile includes interlacing warp threads and weft threads such that there are spaces between adjacent warp threads and adjacent weft threads. | 03-08-2012 |
20120063805 | DEVELOPING CARTRIDGE AND IMAGE FORMING APPARATUS EMPLOYING THE SAME - A developing cartridge and an image forming apparatus employing the same which include a developer sealing configuration to prevent a developer in a developing chamber of the developing cartridge from leaking during a distribution process are disclosed. The developing cartridge of an image forming apparatus, the developing cartridge including: a developing housing which accommodates therein a developer and includes an opening through which the developer is supplied to the outside; an image carrier which is mounted in the developing housing; a developing roller which is mounted in the opening of the developing housing to face the image carrier and develops an image on the image carrier; and a sealing member which includes a sealing part partially provided between the image carrier and the developing roller in a sealing location and sealing the opening and a grip part extended from the sealing part to an outside of the developing housing. | 03-15-2012 |
20120063806 | SEAL MEMBER, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A seal member covers a space between a developing roller and a casing of a developing device. The seal member includes a flexible sheet and a reinforcing member fixed to the sheet. The reinforcing member is fixed to the casing. Notches are provided in the reinforcing member in a direction perpendicular to the length of the reinforcing member. | 03-15-2012 |
20120082476 | DEVELOPING DEVICE PROVIDED WITH SEALING MEMBERS ASSEMBLED TO THICKNESS-REGULATION MEMBER - A developing device includes a casing having an opening extending in a first direction, a developing roller, a thickness-regulation member, an engagement portion and a sealing member. The thickness-regulation member includes a thin-plate member and a regulating portion. The thin-plate member is fixed to the casing and has a lateral end extending in a second direction. The regulating portion is fixed on the thin-plate member and has an end face extending in a direction. The engagement portion is fixed on the thin-plate member and positioned closer to the lateral end than the end face to the lateral end to provide a groove between the engagement portion and the end face. The sealing member is fitted in the groove and has a length in the first direction longer than a length of the groove prior to assembly of the sealing member into the groove. | 04-05-2012 |
20120082477 | DEVELOPING DEVICE PROVIDED WITH THICKNESS-REGULATION MEMBER RESISTANT TO ABRASION - A developing device includes a casing having an opening extending in a first direction, a developing roller, a thickness-regulation portion, a sealing member and a contact portion. The thickness-regulation portion includes a thin-plate member and a regulating portion. The thin-plate member has a base end portion fixed to the casing and a free end portion to which the regulating portion is fixed. The thin-plate member has a lateral end extending in a second direction. The regulating portion has an end face extending in a direction. The sealing member is disposed on the thin-plate member and in intimate contact with the end face of the regulating portion. The contact portion is fixed on the thin-plate member at a position closer to the lateral end than the sealing member to the lateral end and made of a material whose hardness is higher than that of the sealing member. | 04-05-2012 |
20120155915 | DEVELOPING APPARATUS HAVING A SPACER AND A LEAKAGE PREVENTER - A developing apparatus includes an organic photo conductor, an OPC frame part to support the organic photo conductor, a developing roller to develop a latent image formed on the organic photo conductor by supplying a developer, a developing roller frame part to support the developing roller, a developer storing part to store the developer and provided with a supplying opening through which the developer is supplied to the developing roller, a spacer removably interposed between the OPC frame part and the developing roller frame part and spacing the OPC frame part from the developing roller frame part such that the organic photo conductor and the developing roller do not contact each other, a leakage preventer removably attached to and sealing the supplying opening, and a connecting part to connect the spacer with the leakage preventer. Thus, the spacer and the leakage preventer are capable of being removed simultaneously. | 06-21-2012 |
20120201565 | SEAL MEMBER FOR PREVENTING LEAKAGE OF MICRO-POWDER FROM ROTATING BODY - Disclosed is a seal member for micro-powder, wherein the sealing properties of toner which is micro-powder for a developing roller or the like, such as an electro-photographic image processor or copying machine have been improved. Specifically disclosed is a seal member ( | 08-09-2012 |
20120207509 | ELECTROPHOTOGRAPHIC PRINTER WITH DUST SEAL - An electrophotographic printer includes a rotatable photoreceptor adapted to receive dry toner and a rotatable toning member arranged with respect to the photoreceptor to supply toner thereto. A seal includes a complaint contact member and a non-contact member. The contact member is arranged in mechanical contact with the photoreceptor. The non-contact member is spaced apart from the surface of the toning member by a selected non-zero distance, the selected distance being greater than zero. This reduces dusting. | 08-16-2012 |
20120243901 | DEVELOPING DEVICE - A developing device includes a seal member adhered to a frame along an axial direction of a developing roller. The seal member seals between the frame and an outer peripheral surface of the developing roller. The frame has a seal supporting surface extending along the axial direction, on which the seal member is supported in a cantilevered fashion. The seal member includes a sheet-like member and an elastic adhesive member. One end portion of the sheet-like member is fixed to the seal supporting surface through the elastic adhesive member, and the other end portion is in contact with the outer peripheral surface of the developing roller. The elastic adhesive member has a first surface adhered to the sheet-like member and a second surface adhered to the seal supporting surface, and at least one slit is formed along the axial direction from the second surface toward the first surface. | 09-27-2012 |
20120251162 | DEVELOPING DEVICE PROVIDED WITH DEVELOPING ROLLER AND THICKNESS REGULATING BLADE - The developing device includes a casing, a developing roller, a thickness regulating blade, and a seal member. The developing roller has an outer peripheral surface carrying developer. The thickness regulating blade is configured to regulate a thickness of the developer carried on the outer peripheral surface and has an opposed surface confronting the casing. The thickness regulating blade further has one end part supported on the casing and another end part provided with a press member in sliding contact with the outer peripheral surface. The press member is located on the opposed surface and protrudes toward the developing roller. The press member is formed with a receiving portion depressed inward at its widthwise ends in an axial direction of the developing roller. The seal member is disposed between the thickness regulating blade and the casing and contacting at least a part of the receiving portion. | 10-04-2012 |
20120269537 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member; a developing device; a sealing member for unsealably sealing a space containing an initial developer; a first supplying device communicatable with the space to supply the developer into the developing device; a second supplying device for supplying the developer into first supplying device; an unsealing mechanism for unsealing the sealing member; and a controller capable of executing an operation in an unsealing mode in which the unsealing mechanism is operated, after supplying operation of second supplying device, to unseal the sealing member. | 10-25-2012 |
20120328324 | CARTRIDGE - A cartridge detachably mountable to a main assembly of an image forming apparatus includes: an accommodating portion for accommodating a developer; a recess provided in an outer wall of a frame for forming the accommodating portion; and a sheet member provided so as to cover the recess. The sheet member and the recess are configured so that an amount of flexure of the sheet member is larger than that of the recess when the cartridge is griped on the sheet member. | 12-27-2012 |
20130011159 | SEALING MEMBER, TONER ACCOMMODATING CONTAINER AND IMAGE FORMING APPARATUS - A toner container detachably mountable to an image forming apparatus, includes a main body for containing toner; a sealing portion for sealing the toner discharge opening; locking projections for snap-fitting engagement with holes provided in a cylindrical member of an image forming apparatus, wherein the projections receive from the cylindrical member unsealing forces for unsealing the toner discharge opening by a relative movement between the sealing portion and the toner container, wherein a number of the locking projections is larger than a number of ribs provided between the holes of the cylindrical member. | 01-10-2013 |
20130028630 | Developing Device Provided With Seal - A developing device includes: a casing; a developing roller mounted on the casing, and having a rotational axis extending in an axis direction and a peripheral surface on which a developer is carried, the developing roller being configured to rotate in a rotational direction about the rotational axis; and a seal provided between the casing and the developing roller to prevent the developer from leaking between peripheral surface and the casing. The seal includes: a film member opposed to the peripheral surface of the peripheral surface of the developing roller; and an elastic member provided between the film member and the casing to press the film member against the peripheral surface of developing member. The casing includes a restricting wall provided downstream of the seal member in the rotational direction to restrict the seal from moving in the rotational direction. | 01-31-2013 |
20130071138 | DEVELOPMENT DEVICE AND IMAGE FORMATION APPARATUS - A development device includes a regulation member partially defining a developer room and configured to regulate the thickness of a developer layer on a developer carrier, the regulation member including a regulation edge facing the developer carrier to control the thickness of the developer layer on the developer carrier, and an end facing an inner wall surface of the developer room; a first seal member attached to the inner wall surface of the developer room at a position facing the end of the regulation member; and a second seal member attached to the regulation member at a portion in the vicinity of the end of the regulation member and being in contact with the first seal member to seal between the first seal member and the end of the regulation member. The second seal member is lower in hardness than the first seal member. | 03-21-2013 |
20130084098 | DEVELOPING DEVICE AND CLEANING DEVICE - A developing device developing a latent image includes a developer bearing member configured to bear a developer, a frame member configured to rotatably support the developer bearing member, and a sealing member, provided on the frame member, including a contact portion configured to contact an end in an axial direction of the developer bearing member and a non-contact portion configured not to contact the developer bearing member, the sealing member including a cut portion provided in the non-contact portion by cutting a surface of the sealing member in a direction intersecting a rotational direction of the developer bearing member, wherein the cut portion does not connect one end and another end of the sealing member in the axial direction. | 04-04-2013 |
20130108314 | Developing Device for Preventing Toner Leakage | 05-02-2013 |
20130129375 | UNIT AND IMAGE FORMING APPARATUS - A unit for use with an image forming apparatus, includes: a developer accommodating portion, constituted by a frame, for accommodating a developer; a sheet member, provided on the frame in contact with a rotatable member, for preventing the developer from leaking out from a gap between the developer accommodating portion and the rotatable member; and a resin member for fixing the sheet member on the frame, wherein the resin member is formed on the frame by injection molding of a resin material and is fixed to the sheet member by welding. | 05-23-2013 |
20130149002 | INK DEVELOPER UNIT, AND SEALING DEVICE USABLE WITH INK DEVELOPER UNIT - A sealing device includes a base member configured to attach to an ink developer unit, a sealing member having a sealing surface configured to at least one of limit an unwanted flow of ink outside of the ink developer unit and conform to an outer surface of a respective roller, and a compliant member disposed between the base member and the sealing member such that the compliant member is configured to vary a sealing force along the sealing surface of the sealing member. | 06-13-2013 |
20130164024 | Developer Supplying Apparatus - A developer supplying apparatus includes a developer carrying member, a casing, and a side seal. The developer carrying member includes a roller body and a brush part having fibrous members disposed on the peripheral surface. The developer carrying member is configured to carry a developer at the brush part. The casing includes a developer storing portion configured to store the developer, and has an opening formed along a rotation axis of the developer carrying member. The casing is configured to support the developer carrying member rotatably such that the brush layer is exposed outside from the opening. The side seal is disposed in an end of the opening in a direction along the rotation axis of the developer carrying member such that the side seal protrudes toward the brush layer to press the brush layer toward the rotation axis. | 06-27-2013 |
20130195501 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A developing device includes : a first developing body that develops a developing agent image on a development surface using a developing agent; a second developing body that develops a developing agent image on the development surface using the developing agent; and a sealing member that is disposed between a region where a first delivery pole and a second delivery pole are opposed to each other and the development surface, and adjacently to the first developing body and the second developing body at distances so small that developing agents formed as magnetic brushes on a first conveyance pole and a second conveyance pole respectively can touch the sealing member to secure sealing to prevent the developing agent from leaking to the outside of a device body. | 08-01-2013 |
20130195502 | Developing Device Having Developer Bearing Member and Layer Thickness Regulating Member - In a developing device, a layer thickness regulating member, configured to regulate thickness of a layer of developer borne on a surface of a developer bearing member, includes: a first plate-shaped member having a pair of opposite ends in a perpendicular direction perpendicular to an axial direction of the developer bearing member, one end in the pair of opposite ends being in contact with the developer bearing member, the other end being supported by the casing; and a second plate-shaped member that is fixedly secured to the casing and that supports the first plate-shaped member. A seal member, which is in contact with an end portion of the developer bearing member in the axial direction of the developer bearing member, is in contact with an end portion of the first plate-shaped member in the axial direction of the developer bearing member. The second plate-shaped member holds the seal member. | 08-01-2013 |
20130209134 | DEVELOPER SUPPLY CONTAINER, DEVELOPER SUPPLYING SYSTEM AND IMAGE FORMING APPARATUS - Conventionally, when a developer is supplied into a developer receiving apparatus from a developer supply container using the air, a filter is provided in the developer receiving apparatus side, but the pressure feeding type wherein a mixture of the air and the developer is continuously fed from the developer supply container into the developer receiving apparatus side involves a problem of filter clogging. | 08-15-2013 |
20130216257 | DEVELOPER TRANSPORTING MECHANISM, DEVELOPING DEVICE WITH THE SAME, AND IMAGE FORMING APPARATUS - A developer transporting mechanism includes a pipe-like transporting path, sealing member, shutter, and urging member. The pipe-like transporting path, through which a developer is transported, has an discharge port at part of its side surface. The shutter is slidable along the surface of the sealing member to open and close the discharge port. The urging member urges the shutter in a direction in which the discharge port is closed. The sealing member is secured to the outer circumferential surface of the pipe-like transporting path. The sealing member also has a reduced part; its dimension in a width direction orthogonal to a direction in which the shutter moves is gradually reduced from the upstream end in the closing direction of the shutter toward the downstream end. | 08-22-2013 |
20130236209 | DEVELOPING APPARATUS, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - A developing apparatus, including: a developer container; a toner bearing member including a roller portion; a seal; a regulating member; and a development entrance sealing member,
| 09-12-2013 |
20130243474 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A longitudinal end portion of an opposing magnetic member of a developer supporting rotator is positioned more longitudinally outside than a longitudinal end portion of a toner supporting side magnetic member. With respect to the opposing magnetic member facing the toner supporting side magnetic member and a downstream magnetic member disposed more downstream than the opposing magnetic member in a rotational direction, a magnetic force generated in a vicinity of both longitudinally end portions thereof is greater than a magnetic force generated longitudinally inside thereof. A housing includes a sealing portion that projects from a position facing a face at a longitudinal end portion of the developer supporting rotator toward the face, such that the sealing portion prevents the toner in a space between the face and an inner face of the housing from scattering outside. | 09-19-2013 |
20130259514 | SEALING MEMBER HAVING INTERNAL LUBRICANT ADDITIVES - A sealing member for use in an electrophotographic image forming device according to one example embodiment includes a molded body formed of an elastomer material and internal lubricant additives. The lubricant additives include at least about 20% by weight of the molded body. The lubricant additives include a wet lubricant, a dry lubricant and rounded beads. | 10-03-2013 |
20130287430 | Developing Device Having Seal Members to Restrict Toner Leakage - A developing device includes: a frame; a developer carrying member rotatably supported to the frame; and a side seal. The developer carrying member is rotatable about its axis in a rotating direction and has an axial end portion and a remaining portion inward of the axial end portion in an axial direction. The side seal is disposed between the frame and a peripheral surface of the axial end portion and includes: a contact member that can contact the peripheral surface; a support member disposed between the contact member and the frame; and a double-sided tape for adhering the contact member to the supporting member. The contact member includes: a first seal member; and a second seal member disposed adjacent to and upstream of the first seal member in the rotating direction. The first seal member and the second seal member are affixed to one adhesive surface of the double-sided tape. | 10-31-2013 |
20130287431 | Developing Device Having Seal Members to Restrict Toner Leakage - A developing device includes: a frame having an opening; a developer carrying member rotatably supported to the frame; and a side seal. The developer carrying member is rotatable about its axis in a rotating direction and has an axial end portion in an axial direction. The side seal is disposed between the frame and a peripheral surface of the axial end portion, and has a contact member contacting the peripheral surface. The contact member includes: a first seal member disposed adjacent to an edge of the opening in the axial direction; and a second seal member disposed adjacent to and upstream of the first seal member in the rotating direction. The first seal member permits developer to move inward in the axial direction and provides a mobility of developer therein higher than that of the second seal member that is made of a material that restricts movement of developer. | 10-31-2013 |
20130330099 | Image Forming Apparatus - A device is disclosed. The device contains a roller, a housing configured to accommodate the roller, at least one seal comprising a first material, wherein the at least one seal is disposed between the roller and the housing, and at least one second material disposed adjacent to the seal. | 12-12-2013 |
20140016959 | DEVELOPER SUPPLY DEVICE - A developer supply device including a developer carrying body, extending in a width direction, configured to carry developer and a casing including an wall, extending in the width direction, disposed between a first room on which the developer carrying body is disposed and a second room configured to store the developer is provided. The first room and the second room communicate each other through an opening formed above the wall. The wall includes end portions having a first height and a central portion. The central portion is disposed between the end portions and has a second height which is higher than the first height. | 01-16-2014 |
20140016960 | DEVELOPMENT DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A development device includes a developer containing part containing two-component developer, a cylindrical developer carrier to carry by rotation the developer to a development range, a first developer transport member disposed in the developer containing part, to supply the developer to the developer carrier while transporting the developer in an axial direction of the developer carrier, and a magnetic field generator disposed inside the developer carrier, having three developer-carrying magnetic poles, consisting of a development pole to generate a first magnetic field in the development range, a pre-development pole to generate a second magnetic field to transport the developer supplied from the developer containing part to the development range, and a post-development pole to generate a third magnetic field disposed between the first magnetic field and the second magnetic field, to transport the developer to a release position where the developer is separated from the developer carrier. | 01-16-2014 |
20140029971 | SEALING DEVICE INCLUDING A FIRST REPLACEABLE COMPLIANT SEALING MEMBER AND A LATCH MEMBER - A sealing device usable with an ink developer unit including a plurality of rollers and a plurality of end cap members includes a first replaceable compliant sealing member and a latch member. The first replaceable compliant sealing member has a plurality of replaceable seal exterior surfaces to form a seal between a first set of rollers of the plurality of rollers and one of the end cap members. The latch member has a closed state to maintain a sealing force on the first replaceable compliant sealing member and an open state to remove the sealing force on the first replaceable complaint sealing member. | 01-30-2014 |
20140037326 | Image Forming Apparatus and Process Unit Capable of Collecting Developer on Photosensitive Drum - An image forming apparatus includes: a photosensitive drum; a developing roller; a supply roller; and a cleaning roller. The developing roller supplies developer to the photosensitive drum. The supply roller supplies developer to the developing roller and has a supply roller body. The cleaning roller collects developer on the photosensitive drum and has a cleaning roller body. Axial end faces of the cleaning roller body and axial end faces of the supply roller body are at the same position in the axial direction, or the axial end faces of the cleaning roller body is positioned outward of the axial end faces of the supply roller body in the axial direction. The cleaning roller rotates in one of a forward direction and a reverse direction at a contact portion where the cleaning roller contacts the photosensitive drum. The cleaning roller rotates at a peripheral speed slower than a peripheral speed of the photosensitive drum when rotating in the forward direction. | 02-06-2014 |
20140056610 | DEVELOPMENT DEVICE AND IMAGE FORMATION APPARATUS - A developer storage device includes a rotation member including a shaft portion protruding from a main body thereof; a support member formed with a hole by which the shaft portion is supported; and a first seal member disposed between the main body of the rotation member and the support member and including a hole into which the shaft portion is inserted. The support member includes a step portion. The step portion includes a first restraint section which restrains motion of the first seal member in an axial direction of the shaft portion, and a second restraint section which restrains motion of the outer periphery of the first seal member in a radial direction of the shaft portion. | 02-27-2014 |
20140064777 | DEVELOPMENT APPARATUS AND CARTRIDGE - A developing apparatus for an image forming apparatus includes a frame having a developer container; a developing roller; a blade for regulating a developer layer thickness on the roller, the blade including a base end portion supported by the frame, and a free end portion contacted to the roller; and an elastic seal provided between the frame and the blade to prevent leakage of the developer from the developer container in an axial direction of the roller at an end portion, wherein in a state before the roller is mounted to the frame, a thickness of the seal, measured in a compression direction in which the seal is compressed by the blade, is larger in a free end portion side than in a base end portion side with respect to a direction crossing with the axial direction. | 03-06-2014 |
20140064778 | DEVELOPMENT DEVICE - A development device used for an image forming apparatus includes a frame member, a developer bearing member configured to develop a latent image formed on an image bearing member using developer, and an edge portion sealing member provided between an edge portion in a rotational axis direction of the developer bearing member and the frame member to prevent the developer from leaking to an outside of the development device from between the edge portion and the frame member, and including, in a state of being compressed between the edge portion and the frame member, a layer that includes an aggregate of a plurality of foam cells in which a foam cell communicating with an adjacent cell via a communication hole and a foam cell not communicating with an adjacent cell are mixed in a direction from an inside of the development device to the outside thereof. | 03-06-2014 |
20140072327 | DEVELOPING APPARATUS, PROCESS CARTRIDGE AND UNIT - A developing device includes first and second frames; a developer carrying member; an end portion seal, provided in the first frame, for sealing between an end portion and the first frame to prevent leakage; a sheet, provided in the second frame in contact with the developer carrying member along the rotation axial direction of the developer carrying member; a filler filling a space defined by the first and second frames, the end portion seal and the sheet at a connecting portion where the end portion seal and the sheet contact each other; and a projected portion provided in the first frame and projected into the space, the projected portion is spaced from the second frame, the end portion seal in the rotation axial direction. | 03-13-2014 |
20140072328 | DEVELOPING DEVICE AND PROCESS CARTRIDGE - A developing device configured to prevent a leakage of developer through a gap between a frame and a longitudinal end of a developer supply roller, includes an elastic bush member, a groove to which the bush member is attached and including an opening to allow an end of the developer supply roller to pass through a seating surface when the developer supply roller is mounted on the groove in a direction intersecting the longitudinal direction, an abutment portion for regulating movement of the bush member in the longitudinal direction, and a bearing member configured to rotatably support an end of the developer supply roller and compress, in the longitudinal direction, the bush member sandwiched between the abutment portion and the bearing member and bias the bush member against an inner wall of the groove. | 03-13-2014 |
20140086619 | Developing Cartridge Having Frame to Which Seal is Assembled Without Adhesion - A developing cartridge includes: a frame defining a developer chamber therein for accommodating developer and being formed with an opening elongated in a longitudinal direction for allowing the developer to flow out of the developer chamber; a member assembled to the frame at a position opposite to the developer chamber with respect to the opening; a seal extending in the longitudinal direction and interposed between the member and the frame; and a protrusion protruding into the seal from at least one of the frame and the member in a protruding direction crossing the longitudinal direction, the protrusion being configured to restrict the seal from moving in the longitudinal direction. | 03-27-2014 |
20140093271 | CARTRIDGE AND IMAGE FORMING APPARATUS - A cartridge detachably mountable to a main assembly of an image forming apparatus includes: a frame; an accommodating portion, constituted by the frame, for accommodating a developer; a seal portion for preventing the developer from being leaking out from the accommodating portion, wherein the seal portion is formed by injection molding at a seal forming portion provided on the frame and is projected from the seal forming portion; and a sprue which is formed integrally with the seal portion by a resin material remaining in a path for permitting flow of the resin material melted when the seal portion is formed by the injection molding and which is projected from the frame in a position different from a position of the seal portion so as to be higher than the seal portion on the basis of the frame. | 04-03-2014 |
20140105635 | Casing Projections of an Image Forming Apparatus Configured to Support a Seal of a Developing Device - A developing device for an image forming apparatus may include a seal and a casing to prevent leakage of developer. In some examples, the seal member may include multiple side surfaces while the casing may include projections that may abut and contact various surfaces of the seal member. According to one arrangement, the casing may include first, second and third protrusions, where each protrusion is configured to abut and contact a corresponding surface of the seal member. Additionally, the second projection may protrude in a position inside of the first projection while the third projection may protrude in a position between the first and second projections. | 04-17-2014 |
20140119770 | UNIT - A unit includes an injection path provided on a frame member and through which a molten resin flows when a seal portion is formed through injection molding, an injection port provided at one end side of the injection path in an injection direction in which the molten resin flows through the injection path and through which the molten resin is injected into the frame member, and a discharge port which is provided at another end side of the injection path in the injection direction and through which the molten resin having passed through the injection path is discharged to a seal forming portion. | 05-01-2014 |
20140133882 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A developing device includes a housing containing toner having an opening at a side thereof, a developing roller supplying the toner supplied through the opening to a photoconductive drum, and a regulator contacting the outer circumference of the developing roller to regulate the amount of the toner supplied to the photoconductive drum. The housing also includes a lower frame having both side portions and a lower end portion respectively forming both edges and a lower edge of the opening in a lengthwise direction, and an upper frame welded and coupled to the lower frame and including a leading end portion forming an upper edge of the opening and a recess portion recessed from the leading end portion at both end portions of the leading end portion in the lengthwise direction. Both side portions of the lower frame includes a first surface contacting the recess portion to prevent the upper frame from being pushed toward the developing roller when the upper frame is welded and coupled to the lower frame. | 05-15-2014 |
20140140723 | DEVELOPING DEVICE FRAME UNIT, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND MANUFACTURING METHOD OF THE DEVELOPING DEVICE FRAME UNIT - A developing device frame unit supporting a regulating member regulating the layer thickness of developer on a developer carrier. The unit includes a frame having a seal forming portion, first and second, first and second end seals contactable to the carrier surface to prevent carrier-axial-direction leaking of the developer, and a blade sealer sealing between the regulating member and the frame to prevent developer leaking when the regulating member is mounted. The blade sealer is an elastomer resin material which is injection-molded with a metal mold and in the seal forming portion where the end seals are provided. The blade sealer connects the end seals with each other, and a protrusion provided by a squeezed-out portion of the resin material is provided by injecting, into a space defined by the metal mold, the seal forming portion, and the end seal seals, a resin material volume larger than a volume of the space. | 05-22-2014 |
20140153958 | SEALING ASSEMBLY, DEVELOPING DEVICE, PROCESS UNIT, AND IMAGE FORMING APPARATUS INCORPORATING SAME - A sealing assembly to contact a rotator includes a sealing member to slidably contact a surface of an end of the rotator in an axial direction of the rotator. The sealing member has an end in a circumferential direction thereof to contact the surface of the rotator with a first pressure. The end in the circumferential direction is fixed to a bearing surface formed on the opening on at least one of an upstream side and a downstream side in a rotation direction of the rotator. The sealing member has an intermediate portion between an upstream end and a downstream end in the circumferential direction to contact the surface of the rotator with a second pressure lower than the first pressure. | 06-05-2014 |
20140153959 | Developing Device for Preventing Toner Leakage - A developing device includes a frame, a developing roller, a blade unit, and a first seal member. A blade unit extends in an axial direction of the developing roller and in contact with the peripheral surface thereof. The first seal member is configured to seal a boundary between the frame and the axial end portions of the developing roller. The frame has a fixing portion to which end portions of the blade is fixed. The fixing portion has a support surface having an outer edge and an inner edge in the axial direction. The outer edge is positioned outward of an inner edge of the first seal member in the axial direction, and the inner edge of the support surface is positioned inward of the inner edge of the first seal member in the axial direction. | 06-05-2014 |
20140153960 | Developing Device for Preventing Toner Leakage - A cartridge is configured to supply developing agent to a peripheral surface of a photosensitive drum. The cartridge includes a frame, a developing roller and first and second side seal members. The developing roller defines an axial direction, and is configured to supply developing agent in the frame to the photosensitive drum. The first side seal member is configured to seal a boundary between the frame and one end portion of the developing roller in the axial direction. The second side seal member is configured to seal a boundary between the frame and another end portion of the developing roller. The first and second side seal members define a gap therebetween in the axial direction, and the gap has a gap length smaller than a width in the axial direction of a maximum width sheet conveyed to the photosensitive drum. | 06-05-2014 |
20140153961 | Developing Device - A developing device including: a first seal member arranged between a housing and a layer thickness regulation blade, and a second seal member arranged between the housing and a developing roller, wherein the first seal member is arranged adjacent to the second seal member in a rotating direction of the developing roller, wherein the second seal member includes a first member contacting a circumferential surface of the developing roller and a second member arranged between the housing and the first member, wherein the second member includes a protruding portion that, in the rotating direction of the developing roller, protrudes more towards the first seal member than the first member, and wherein end portions of the first and second members in the rotating direction of the developing roller are respectively configured to contact with the first seal member. | 06-05-2014 |
20140153962 | Developing Device - A developing device including: a housing; a developing roller including a roller main body having a recess portion recessed inwards in an axis line direction, the recess portion including, a first surface extending in the axis line direction, and a second surface extending from an inner end portion of the first surface towards a direction intersecting with the axis line direction; and a seal member arranged between the housing and the roller main body, wherein, in the axis line direction, the second surface is positioned within a range in which the seal member is arranged, and wherein, in the axis line direction, a distance from an inner end portion of the seal member to the second surface is larger than a length of a part at which the seal member and the first surface overlap with each other. | 06-05-2014 |
20140178093 | Developing Device, Process Cartridge and Image Forming Apparatus - A developing device includes a casing configured to accommodate developer, a developing roller, a seal member, at least portion of which is disposed between the developing roller and the casing, and which includes a fabric member including a plurality of first fibers extending in a first direction, and a heat radiation member configured to contact end surfaces of the first fibers of the seal member and radiate heat of the seal member. | 06-26-2014 |
20140270842 | Image Forming Apparatus - A method presently disclosed provides a housing configured to accommodate a roller, configured to accommodate a toner, and configured to accommodate at least one magnetic seal member, wherein the at least one magnetic member is configured to minimize leakage of the toner between the roller and the housing and couples at least one non-magnetic seal member with the housing, wherein the at least one non-magnetic seal member is configured to minimize leakage of the toner between the housing and the roller. | 09-18-2014 |
20140286673 | DEVELOPMENT DEVICE, IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS - A development device includes a developer container that includes a developer chamber configured to contain a developer, a developer carrier configured to hold the developer on a surface of an outer periphery and configured to rotate about an axis, and faces an electrostatic latent image carrier that carries an electrostatic latent image, a longitudinal sealing member configured to contact the surface of the developer carrier in the long-side direction and configured to provide a seal of the developer from between the developer container and the developer carrier, and a capture unit configured to capture the developer from between the longitudinal sealing member and the developer carrier. | 09-25-2014 |
20140294433 | DEVELOPING ROLLER AND DEVELOPING DEVICE PROVIDED WITH THE SAME - A developing roller configured to carry developer and extending in an axial direction includes: a first rotation shaft; a second rotation shaft; a rubber body portion; a first cylindrical rubber portion; and a second cylindrical rubber portion. The body portion has a first side and a second side opposite to the first side in the axial direction. The first cylindrical rubber portion is disposed on the first side. The first rotation shaft is configured to be fitted with the first cylindrical rubber portion. The second cylindrical rubber portion is disposed on the second side. The second rotation shaft is configured to be fitted with the second cylindrical rubber portion. The rubber body portion is configured to be deformable more than the first cylindrical rubber portion and the second cylindrical rubber portion. | 10-02-2014 |
20140294434 | DEVELOPING ROLLER AND DEVELOPING DEVICE PROVIDED WITH THE SAME - A developing roller configured to carry developer and extending in an axial direction includes: a hollow cylindrical rubber portion; and a shaft. The hollow cylindrical rubber portion has axial end faces. The shaft extends through the hollow cylindrical rubber portion and has a shaft portion positioned inward of the axial end faces of the hollow cylindrical rubber portion in the axial direction. The shaft portion has an axially middle portion and axial end portions positioned outward of the axially middle portion in the axial direction. The axially middle portion has an outer diameter smaller than that of each of the axial end portions. | 10-02-2014 |
20140314439 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing device includes a developer carrying member that carries developer; a frame member that supports the developer carrying member; a sealing section that faces a peripheral surface of the developer carrying member and suppresses leakage of the developer; and an interval ensuring member that maintains a distance between the image carrying member and the developer carrying member. The interval ensuring member includes a movement regulating portion that prevents movement of the interval ensuring member in a rotation direction of the developer carrying member when the image carrying member and the developer carrying member rotate, and a maintaining portion that contacts the image carrying member and the developer carrying member for maintaining the distance between the image carrying member and the developer carrying member. The maintaining portion and the sealing section are positioned in a predetermined cross section that is orthogonal to an axial line of the developer carrying member. | 10-23-2014 |
20140376954 | Developing Device - A developing device includes a casing configured to accommodate developer, a developing roller, a seal member, at least a portion of which is disposed between the developing roller and the casing, the seal member including a fabric member having plural fibers extending in a first direction and plural second fibers extending in a second direction, wherein the plural first fibers and the plural second fibers are intersecting each other, and each of the fibers of the fabric member include a circumferential surface which has a first heat radiation amount per unit area, and an end surface having a second heat radiation amount per unit area larger than the first heat radiation amount, and a heat radiation member disposed at an end portion of the seal member in an axial direction of the developing roller and is configured to contact the end surfaces of the fibers. | 12-25-2014 |
20150023687 | Developing Device Provided with Seal Configured to Prevent Developer Leakage - A developing device includes: a developing roller; a casing; and a seal. The developing roller has a rotational axis extending in an axial direction. The casing has a first wall, and a second wall extending from the first wall toward the developing roller in an extending direction. The seal is disposed on the first wall and in contact with a peripheral surface of the developing roller. The seal includes: a film contacting with the peripheral surface of the developing roller; and a substrate disposed between the film and the first wall. The second wall has a first surface facing in a first direction and a second surface facing in a second direction. The first surface extends in the extending direction and contacts with the substrate of the seal. The second surface faces away from the first surface. | 01-22-2015 |
20150050040 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developing roller, a regulating blade, and seal members. The regulating blade extends in a rotation axis direction of the developing sleeve, is disposed opposite to a circumferential surface of the developing sleeve, and regulates a quantity of the toner present on the circumferential surface of the developing sleeve. The seal members are disposed opposite to the circumferential surface of the developing sleeve without being in contact with both ends of the developing sleeve in the rotation axis direction, and inhibit the toner on the circumferential surface from moving to the rotation axis direction ends by magnetic brushes formed between the magnet roller and the seal members. An inner surface part of each seal member which is opposite to the circumferential surface of the developing sleeve has root parts which have crest parts formed in a serrated shape. | 02-19-2015 |
20150050041 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developing roller, a regulating blade, seal members, and contact members. The regulating blade extends in a rotation axis direction of the developing sleeve, is disposed opposite to a circumferential surface of the developing sleeve, and regulates a quantity of the toner on the circumferential surface of the developing sleeve. The seal members are disposed opposite to the circumferential surface without being in contact with both ends of the developing region in the rotation axis direction. Each contact member is an edge on the developing region side in the rotation axis direction, provided at a position at an upstream side in a rotational direction of the circumferential surface of the developing sleeve relative to an arrangement position of the regulating blade, and configured to be in contact with the circumferential surface of the developing sleeve. | 02-19-2015 |
20150063862 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device forms an image by developing an electrostatic latent image on a photoreceptor rotating about a rotation axis. The developing device includes a housing having an opening opposite the photoreceptor, a developing sleeve disposed inside the housing, a magnetic body disposed in a central portion of the developing sleeve and not in no-magnet portions thereof at both sides of the central portion, and seal members supported by the housing. Each of the seal members shields either one of portions of the photoreceptor that are located opposite the no-magnet portions and is in surface contact with either one of end portions of the photoreceptor farther from a center of the photoreceptor than the no-magnet portions. Each of the seal members includes, at an end thereof closer to the center of the photoreceptor than the other end thereof, a non-contact portion that is not in contact with the photoreceptor. | 03-05-2015 |
20150078777 | DEVELOPING DEVICE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A developing device includes a developing roller including a base and a surface layer formed on the base, the surface layer including a polyurethane resin having a fluorine group and a polyfunctional isocyanurate structure, a toner storage chamber being partially in contact with the developing roller and to support the developing roller, and a sealing member provided at opposed ends of an end portion of the toner storage chamber in a rotating axis direction of the developing roller, and to seal in toner moving to the end portion of the toner storage chamber, the sealing member before use having a coefficient of static friction in a range of from 0.08 to 0.19. | 03-19-2015 |
20150078778 | DEVELOPING DEVICE AND PROCESS CARTRIDGE - A developing device includes: a developer carrying member; a developing container; a pair of first seal members provided at end portions of the developer carrying member along a circumferential direction of the developer carrying member so as to contact the developer carrying member in a side opposite from a side where the developer carrying member opposes the image bearing member; and a pair of second seal members provided at the end portions of the developer carrying member adjacent to the first seal members in a side downstream of the developing position and which is upstream of the first seal members with respect to a rotational direction of the developer carrying member, wherein the second seal members contact a surface of the developer carrying member. | 03-19-2015 |
20150078779 | CARTRIDGE AND UNIT - A cartridge detachably mountable to a main assembly of an image forming apparatus, includes: a rotatable member; a blade member contacted to the rotatable member; a frame, formed of a resin material, for supporting the blade member; and a seal member provided on the frame to be contacted to a portion of the blade member, opposite from a portion where the blade member is contacted to the rotatable member, in each of one end side and anther end side of the blade member with respect to an axial direction of the rotatable member, wherein the seal member is formed on the frame by injection molding for sealing a gap between the blade member and the frame. | 03-19-2015 |
20150086236 | Developing Cartridge - A developing cartridge includes a housing configured to accommodate a developing agent and including a first frame and a second frame, a developing agent carrying member rotatable on an axial line and configured to carry the developing agent, and a layer thickness regulating member configured to regulate a layer thickness of the developing agent carried by the developing agent carrying member. The first frame has a first facing surface facing the layer thickness regulating member. The second frame has a second facing surface facing the layer thickness regulating member. A welded region where the first frame and the second frame are welded and include a first welded portion extending from the first facing surface in a first direction intersecting with and away from the first facing surface, and a second welded portion extending from the first welded portion inward in a second direction intersecting with the first direction. | 03-26-2015 |
20150086237 | Developing Unit - A developing unit includes a housing, a developing roller and a seal contacting an outer peripheral surface of the developing roller. The seal includes a first part disposed inward in an axial line direction of the developing roller and contacting the outer peripheral surface of the developing roller, and a second part contacting an outer edge of the first part in the axial line direction and disposed outward from the first part in the axial line direction and contacting the outer peripheral surface. The first part has a contact surface contacting the developing roller and a plurality of first grooves each of which is recessed from the contact surface and extends along the contact surface. The plurality of first grooves extends from outward to inward in the axial line direction, as the plurality of first grooves extends from upstream to downstream in a rotational direction of the developing roller. | 03-26-2015 |
20150093144 | Developing Device - There is provided a developing device including a developing roller, a housing configured to support the developing roller, a first seal member arranged between the developing roller and the housing at each end portion of the developing roller in an axial direction thereof, and a second seal member arranged between the developing roller and the housing at an inner side of each first seal member in the axial direction and having a smaller frictional force per unit area to be applied with respect to the developing roller than the first seal member. | 04-02-2015 |
20150110520 | Developing Device - A developing device including a housing, a developing roller rotatably provided to the housing, a layer thickness regulation blade contacting the developing roller, and a seal member arranged between the housing and each end of the developing roller, wherein the layer thickness regulation blade includes a blade main body extending along an axial direction of the developing roller, and a blade rubber part protruding from a surface of the blade main body facing the developing roller and contacting the developing roller, wherein an end surface of the blade rubber part in the axial direction is in contact with an inner end surface of the seal member in the axial direction, and wherein a suppression part configured to suppress a strength of flow of the developer is provided at a corner part between the blade rubber part and the seal member. | 04-23-2015 |
20150110521 | Developing Device - A developing device including a housing, a developing roller, a seal member arranged between the housing and each end of the developing roller, and a layer thickness regulation blade including a blade main body, and a blade rubber part protruding from a surface of the blade main body and contacting the developing roller, wherein an end surface of the blade rubber part in an axial direction of the developing roller is in contact with an inner surface of the seal member in the axial direction, and wherein the blade rubber part has an inclined surface at each end thereof in the axial direction, the inclined surface extending toward an upstream side in a rotating direction of the developing roller while extending toward an outer side in the axial direction so as to extend to the seal member. | 04-23-2015 |
20150331359 | DEVELOPING UNIT AND PROCESS CARTRIDGE - The present invention relates to a developing unit including a developer container accommodating a developer; a developer bearing member bearing the developer supplied from the developer container; a magnetic-field generation member disposed in the developer bearing member, the magnetic-field generation member having a magnetic-field generation area generating a magnetic field for attracting the developer to the developer bearing member; and a sealing member disposed at the developer container, the sealing member preventing the developer from leaking from a gap between a longitudinal end of the developer bearing member and the developer container. An end of the magnetic-field generation area of the magnetic-field generation member is disposed inside an inner end of the sealing member in the longitudinal direction of the developer bearing member. The developer bearing member develops a latent image formed on the image bearing member with the developer while keeping in contact with the image bearing member. | 11-19-2015 |
20150331363 | TONER CONTAINER AND IMAGE FORMING DEVICE In Which The Toner Container Has Protrusions Which Interact With The Image Forming Apparatus - A system with a container including a protrusion, and a receiver to receive the container. The receiver includes a slide block that is movable relative to a body of the receiver, the slide block including two surfaces, a first surface, initially contacted by the protrusion of the container during insertion of the container into the receiver, having a first slope to resist movement of the container towards the receiver, and a second surface, subsequently contacted by the protrusion of the container during the insertion of the container into the receiver, having a second slope to interact with the protrusion of the container to assist movement of the container towards the receiver. This construction provides the user with a changing insertion force to indicate proper mounting of the container. | 11-19-2015 |
20150338770 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING DEVICE - A developing device includes a developer bearing member that bears a developer, a developer regulating member having a regulation portion comprised of an elastic member contacting the developer bearing member, and a supporting portion supporting the regulation portion, a longitudinal direction of the regulation portion being along that of the developer bearing member, the regulation portion having a base portion and tip portion, the base portion being an end portion on a side of a portion connected with the supporting portion in a transverse direction, the base portion being opposite to the tip portion, the tip portion being disposed on an upstream side in a moving direction of the developer bearing member, the developer regulating member regulating a developer on the developer bearing member, and a sealing member contacting a regulation portion's surface, the surface being on an opposite side of the regulation portion to the developer bearing member. | 11-26-2015 |
20150362861 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - A developing device includes a developer bearer to carry developer to a developer range where the developer bearer faces a latent image bearer, a development casing forming a developer storing part storing the developer to supply to the surface of developer bearer, a developer through opening communicating a space in where the developer bearer is disposed and the developer storing part, a cover sheet covering the developer through opening at the developing casing, and when the cover sheet is removed, the developer pass through the developer through opening, a sheet collecting shaft to collect the cover sheet by rotating, and a transmitting mechanism to transmit a force for rotating to the sheet collecting shaft. The transmitting mechanism does not transmit the force to the collecting shaft after the cover sheet is collected. | 12-17-2015 |
20160041501 | END SEAL MEMBER FOR ELECTROPHOTOGRAPHIC IMAGE-FORMING DEVICE - A high-quality end seal member which is easy to manufacture, and which exhibits excellent sealing properties with respect to inhibiting the leakage of toner in a toner-handling device of an image-forming device. End seal member for inhibiting, at a desired acceleration, leakage of toner from end of rotating body using anti-leakage gap obtained by causing recessed region to be deformed toward rotating body is provided with sealing member having striped pattern comprising plurality of steps of linear configuration which come in contact with toner carrier, i.e. rotating body, of image-forming device. When toner conveyed by toner carrier comes in contact with radiused region at edge of projecting region of irregular surface of sealing member toner scraping angle is greater than toner angle of repose. Elastic body at back surface of sealing member is used to achieve reactive-force-providing elasticity for contact load between sealing member and rotating body. | 02-11-2016 |
20160070203 | DEVELOPMENT DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A development device in which there is a lubricant opposite in polarity to a developer in a surface region of a developer bearing member contacting an image bearing member and an end seal when the developer bearing member rotates. | 03-10-2016 |
20160109830 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing device includes a developer bearing member. A lubricant is applied to a surface of the developer bearing member. In an axial direction of the developer bearing member, an end of the developer bearing member is located further outward than an outer end of a seal member, and an end of a cleaning member is located further outward than the end of the developer bearing member. In the axial direction of the developer bearing member, a first application quantity of the lubricant applied to the surface of the developer bearing member at a position further outward than the outer end of the seal member is larger than a second application quantity of the lubricant applied to the surface of the developer bearing member at a position corresponding to an opening. | 04-21-2016 |
20160170329 | DEVELOPING DEVICE, AND PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS INCORPORATING SAME | 06-16-2016 |
20160170330 | DEVELOPER ACCOMMODATING CONTAINER, DEVELOPER ACCOMMODATING UNIT, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS | 06-16-2016 |