Entries |
Document | Title | Date |
20080199206 | CORONA CHARGING DEVICE CLEANING APPARATUS AND METHOD OF CLEANING A CORONA CHARGING DEVICE - A corona charging device cleaning apparatus and method of cleaning a corona charging device includes a support member that includes two side surfaces that face in opposite directions. A side shield cleaning member is attached to each side surface to clean an inner surface of a side shield of a corona device. The support member of the corona charging device cleaning apparatus may also include a concavity and a cavity portion. A screen grid cleaning member may be attached to the concavity of the support member to clean a screen grid of the corona charging device. A charging-component cleaning member may be disposed inside the cavity portion of the support member to clean a charging component of the corona charging device. | 08-21-2008 |
20080199207 | Cleaning device and charging device, image holding unit and image forming apparatus using same - A cleaning device is provided and includes: three or more cleaning members for cleaning a wire member, the three or more cleaning members being separately disposed along a longitudinal direction of the wire member and including a pair of side cleaning members and an intermediate cleaning member, the intermediate cleaning member being disposed opposite to the pair of side cleaning members with respect to the wire member and disposed between the side cleaning members in the longitudinal direction of the wire member; a mechanism that moves at least one of the cleaning members so as to contact all of the cleaning members with the wire member or separate all of the cleaning members from the wire member; and a mechanism that moves all of the cleaning members along the longitudinal direction of the wire member in a state where all of the cleaning members are contacted with the wire member. | 08-21-2008 |
20080199208 | Method and device to prevent dust agglomeration on corona electrodes - The present invention is related to preventing dust agglomeration on a sharp electrode which is used for generating corona. According to certain aspects, the invention includes a dust shroud which decreases or prevents dust accumulation on the sharp electrodes. The dust shroud changes the gas flow path so as to reduce the amount of gas passing near the sharp electrode. An advantage of the shroud is that it prevents dust from building up on the electrodes. The shroud is a simple, passive addition to the electrostatic pump, such that the pump is otherwise able to operate normally throughout its life. In embodiments, the shroud can be used to protect a corona electrode used in heat sink applications especially in electronics cooling. It can also be used in electrostatic precipitators for cleaning dust or chemical or microbe particles from air. | 08-21-2008 |
20080226334 | DISCHARGER, IMAGE CARRIER UNIT, AND IMAGE FORMING APPARATUS - A discharger includes: a discharge electrode member that is placed opposedly to a member to be charged; an opposed electrode member that is placed opposedly to the discharge electrode member; and a power source circuit that applies a discharge voltage for generating a discharge between the discharge electrode member and the opposed electrode member, and the electrode member having a surface that includes a covered layer covered by a covering material is formed on a surface opposed thereto, and the covering material containing a carbon atom, or a carbon atom and another atom or other plural atoms as a main component, and having an SP3 structure by a carbon atom. | 09-18-2008 |
20080260417 | CHARGING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A charging device ( | 10-23-2008 |
20080292354 | Cleaning device, image forming apparatus, method for controlling cleaning device, control program, and computer-readable storage medium - A cleaning device | 11-27-2008 |
20080317494 | Cleaning head pick-up system - A corotron cleaning assembly includes a self-seating, spring-loaded locating pin drivingly connected to a drive unit that is used to drive a wire cleaning head that is located within a CRU. This assembly allows for easy separation of the drive unit from the cleaner when the CRU that contains the wire is replaced. The bullet shaped pin rides on a worm drive and when the pin is driven into the cleaner head, the bullet hits an inclined ramp and is biased downward until such a point that the pin hits a recessed receptacle. Once the pin is in the receptacle, the pin is capable of driving the wire cleaning head. When the cleaning head is removed, the act of removal separates the pin from the receptacle. | 12-25-2008 |
20090010674 | IMAGE FORMING DEVICE - An image forming device including: an image holding member; a charging member; a latent image-forming unit; a developing unit that develops the electrostatic latent image formed on the image holding member with a developer including a toner and a carrier, the toner comprising an external additive having first inorganic particles with a volume average particle diameter of 80 nm to 300 nm, and the carrier including a core material having a magnetic powder dispersed in a resin and a resin covering layer that covers the core material; a transfer unit; a removal unit; and an aggregation-forming unit that, by contacting a surface of the charging member and rotating in accordance with rotation of the charging member, removes adherents on the surface of the charging member, including the first inorganic particles, from the surface of the charging member, and forms aggregations in which the removed first inorganic particles are aggregated. | 01-08-2009 |
20090052935 | CHARGING APPARATUS, IMAGE FORMING UNIT THAT EMPLOYS THE CHARGING APPARATUS, AND IMAGE FORMING APPARATUS THAT EMPLOYS THE IMAGE FORMING UNIT - A charging apparatus includes a charging roller and a cleaning member. The charging roller charges a surface of an image bearing body. The cleaning member extends in a longitudinal direction parallel to the charging roller and that cleans the charging roller. The charging apparatus includes a bearing and a supporting member. The bearing supports a shaft of the charging roller. The cleaning member is mounted to the supporting member the cleaning member is held between the supporting member and the charging roller. The supporting member includes a surface to which the cleaning member is mounted, the surface being a curved surface configured to a circumferential surface of the charging roller. The supporting member includes a surface to which the cleaning member is mounted, the surface including a flat portion extending upstream with respect to rotation of the charging roller and a curved portion extending downstream. | 02-26-2009 |
20090060563 | Cleaning device and image forming apparatus - A cleaning device includes a cleaning roll and an intervening member. The cleaning roll contacts the surface of a charge roll that charges a photoconductor, rotates, and cleans the surface of the charge roll. The intervening member is intervened between the charge roll and the cleaning roll and causes the charge roll and the cleaning roll to separate from each other. The intervening member may be spacers that are intervened at both end portions of the charge roll and the cleaning roll and form a gap between the charge roll and the cleaning roll. The intervening member may also be a lubricant. | 03-05-2009 |
20090067874 | Charging device, process cartridge, image forming apparatus, and cleaning member - A charging device includes a charging member that gives an electric charge to an object to be charged by contacting the object, and a cleaning member that cleans the charging member by contacting the charging member. The cleaning member includes a base formed of a polymer material having a foamed structure and a covering film. The covering film is formed of a mixture of a resin having a crosslinked structure and electroconductive particles and covers, near a surface of the base, a structural wall of the formed structure. | 03-12-2009 |
20090067875 | CHARGING DEVICE IN IMAGE FORMING APPARATUS - According to an embodiment of the invention, cleaning sheets that contact and clean a needle electrode are caused to meander along the shape of a slit formed on a guide plate of a needle electrode charger case. Thus, a contact width on the cleaning sheets with the needle electrode is expanded. Unbalanced wear at particular positions on the cleaning sheets is prevented and the life of the cleaning sheets is extended. | 03-12-2009 |
20090074444 | CHARGING WIRE CLEANING APPARATUS - Cleaning performance of a cleaning pad for cleaning a charging wire is maintained so that the charging voltage of an image carrier by a charging wire is stabilized. A charging wire cleaning apparatus is provided with a cleaning pad for cleaning a charging wire which charges an image carrier, a slider which is a supporting body for supporting the cleaning pad, and a screw shaft which is a moving mechanism for reciprocating the slider in parallel to the charging wire. When the slider is at a predetermined position of the reciprocation range, the cleaning pad and the charging wire are separated, and the cleaning pad is adapted to be shifted with respect to the charging wire in this state. | 03-19-2009 |
20090087212 | CHARGING DEVICE - A charging device includes a charging roller for electrically charging a photosensitive member. The charging roller alternately has pits and projections along a circumferential direction thereof. The projections project in an inclined direction in which the projections are inclined with respect to a radial direction of the charging roller. The charging device further includes a roller rotating mechanism for rotating the charging roller to provide a peripheral movement thereof in a sense from the radial direction toward the inclined direction, a brush for cleaning the charging roller, and a brush rotating mechanism for rotating the brush to provide a peripheral movement thereof counterdirectionally with the inclined direction at a position in which the brush and the charging roller contact each other. | 04-02-2009 |
20090087213 | CHARGING DEVICE INCLUDING CHARGING ROLLER AND CLEANING ROLLER - A charging device, a process cartridge, and an image forming apparatus are provided. The charging device includes a charging roller configured to charge an image carrier and a cleaning roller configured to clean the charging roller while making contact with a surface of the charging roller. The charging device further includes a bearing member including a first portion configured to rotatably support a rotational shaft of the charging roller and a second portion configured to rotatably support a rotational shaft of the cleaning roller. The charging device also includes an elastic member provided outside of the second portion of the bearing member with respect to an axial direction of the rotational shaft of the cleaning roller such that the charging roller makes contact with the image carrier when the first portion of the bearing member is pressed by the elastic member. | 04-02-2009 |
20090092410 | CORONA CHARGING DEVICE CLEANER - A device that improves the effectiveness of a corona charging element cleaner by forcing it to travel to the end-limits of the outboard end of the corona charging element to ensure that the corona charging element is completely wiped clean. The device uses a pawl and rack to affect a ratchet-like motion, the direction of which permits travel in the opposite direction only after the limit of travel is reached. | 04-09-2009 |
20090103941 | Image Formation Apparatus - An image formation apparatus which includes a rotating image-bearing body, a charging section, an exposure section, a developing section, a transfer section, and a residue toner-charging section. The charging section charges the image-bearing body. The exposure section forms an electrostatic latent image on the image-bearing body that has been charged. The developing section develops the electrostatic latent image and forms a toner image. The transfer section transfers the toner image to a transfer body. The residue toner-charging section is provided upstream of the charging section and downstream of the transfer section and, after the transfer, charges transfer residue toner to a normal polarity. The transfer residue toner that has been charged to the normal polarity by the residue toner-charging section is recycled at the developing section. The residue toner-charging section is provided with a nonwoven fabric, which features conductivity and touches against the image-bearing body. | 04-23-2009 |
20090136253 | IMAGE FORMING APPARATUS - An image forming apparatus is constituted by an image bearing member; a corona charging member including a wire; a heat generating member for generating heat by energization; a shielding member, including the heat generating member, capable of shielding a portion of the corona charging member opposing to the image bearing member from the image bearing member by being moved between the corona charging member and the image bearing member; an energization control member for controlling energization of the heat generating member; and moving member for moving the shielding member to a first position at which the shielding member shields the portion and a second position retracted from the first position. When the shielding member is located at the first position, at least a part of the heat generating member is disposed between the corona charging member and the image bearing member. | 05-28-2009 |
20090162092 | CHARGING MEMBER CLEANING UNIT, METHOD OF PRODUCING CHARGING MEMBER CLEANING UNIT, CHARGING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A charging member cleaning unit, that contacts a charging member that charges the surface of an image holding member provided in an image forming apparatus, and is used for cleaning the surface of that charging member, has an elastic layer, and has an amine content within the elastic layer of not more than approximately 60 ppm. | 06-25-2009 |
20090169237 | CLEANING ROLLER FOR CLEANING CHARGING ROLLER AND IMAGE FORMING APPARATUS - A cleaning roller for cleaning a charging roller in an image forming apparatus is disposed in contact with an outer peripheral surface of a charging roller to remove foreign matters attached to the outer peripheral surface of the charging roller. The cleaning roller has a metal core and a polyurethane foam layer covering an outer peripheral surface of this metal core. The polyurethane foam layer includes a number of cells. The number of cells per inch is 40 or more and 80 or less, and an open ratio of a wall surface of cells is 3% or more and 50% or less. | 07-02-2009 |
20090180794 | CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A charging device includes a charging roller and a cleaning roller configured to make contact with the charging roller. The cleaning roller is rotated following the charging roller. A dynamic friction coefficient of a surface of the charging roller measured by an oiler belt method is equal to or larger than 0.5. | 07-16-2009 |
20090180795 | CHARGING DEVICE CAPABLE OF EFFICIENTLY CHARGING IMAGE CARRIER - A charging device includes a charging roller, a drive transmission device, and a charging roller cleaner. The charging roller opposes an image carrier driven to rotate and rotates to charge the image carrier. The charging roller cleaner contacts the charging roller to clean the charging roller. The drive transmission device transmits torque from the image carrier to the charging roller, and includes an image carrier gear and a driven gear. The image carrier gear and the driven gear form a gear train to drive the charging roller in response to rotation of the image carrier. The charging roller cleaner is disposed facing a rear surface of the charging roller to prevent displacement of the charging roller due to a force generated by a pressure angle formed between the image carrier gear and the driven gear when the charging roller rotates in response to rotation of the image carrier. | 07-16-2009 |
20090208239 | Charging Roller and Image Forming Apparatus - A charging roller, adapted to face an image carrier at a predetermined charging gap and charge the image carrier in a non-contact state, including: a conductive shaft, provided with a pair of annular concave portions formed on an outer circumferential surface at both ends thereof; a conductive layer, formed on the outer circumference surface at a center portion of the conductive shaft defined between the pair of concave portions; and an insulating layer, formed on the outer circumferential surface at outer portions of the conductive shaft from the pair of annular concave portions. | 08-20-2009 |
20090274479 | WEB FED CHARGING ROLL CLEANER - An apparatus for applying an electrical charge to a charge retentive surface, wherein a bias charge roll member is situated proximately to a surface to be charged such as, a photoreceptor having a cleaning system which includes a web material in contact with the bias charge roll to remove containments thereform. | 11-05-2009 |
20090274480 | WEB FED CHARGING ROLL CLEANER - An apparatus for applying an electrical charge to a charge retentive surface, wherein a bias charge roll member is situated proximately to a surface to be charged such as, a photoreceptor having a cleaning system which includes a web material in contact with the bias charge roll to remove containments thereform. | 11-05-2009 |
20090285597 | Developing device and image forming apparatus - Provided are a developing device and an image forming apparatus which employ a hybrid development method, have a toner-collecting developer supporting member and keep toner collecting ability stable for a long period of time to form high-quality images without development hysteresis (ghost) over a long period of time. A toner separation member abutting the toner-collecting developer supporting member through a toner-collecting developer layer is provided, and the toner separation member is applied with a bias voltage to form an electric field in such a direction as to pull toner away from the toner-collecting developer supporting member to prevent the toner from accumulating on the surface of the toner-collecting developer supporting member. | 11-19-2009 |
20090297206 | CLEANING MEMBER, CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A cleaning member including a core bar, an elastic coating layer, and high-friction coefficient parts provided on both ends of the cleaning member, wherein the cleaning member is roller-shaped and configured to clean a surface of a roller member to be cleaned in contact therewith. | 12-03-2009 |
20090304410 | CLEANING DEVICE, CHARGER UNIT USING THE SAME, IMAGE FORMING ASSEMBLY AND IMAGE FORMING APPARATUS - A cleaning device includes a pair of bilateral cleaning members arranged with an interval in a length direction of a wire rod, an intermediate cleaning member located on an opposite side of the pair of bilateral cleaning members via the wire rod and arranged at an intermediate position between the bilateral cleaning members in the length direction of the wire rod, a wire rod contact unit that controls at least one of the plurality of cleaning members so that the plurality of cleaning members contacts with or separates away from the wire rod, and a cleaning movement unit which moves the plurality of cleaning members along the length direction of the wire rod in the state where the plurality of cleaning members are in contact with the wire rod by the wire rod contact unit. | 12-10-2009 |
20100021198 | BLADES, PRINTING APPARATUSES, REPLACEABLE CARTRIDGES AND METHODS OF TREATING SUBSTANCES ON SURFACES - Blades, printing apparatuses, replaceable cartridges and methods of treating substances on surfaces are disclosed. An embodiment of a blade for treating a substance on a surface of a component includes a body having a free end portion with a surface, and which is comprised of an elastomeric material. A bi-material spring is adapted to apply a load to the body such that the surface of the body treats the substance on the surface of the component. | 01-28-2010 |
20100028040 | METHOD AND APPARATUS FOR AUTOMATIC COROTRON CLEANING IN AN IMAGE PRODUCTION DEVICE - A method and apparatus for automatic corotron cleaning in an image production device is disclosed. The method may include receiving a first dynamic current reading, the dynamic current being the current supplied to a photoreceptor of the image production device, determining if the first dynamic current reading exceeds a predetermined threshold, the predetermined threshold being a threshold set on the allowable variation in the dynamic current value, wherein if it is determined that the first dynamic current reading exceeds the predetermined threshold, sending a signal to a cleaning device to clean the corotron, determining that the corotron has been cleaned, receiving a second current reading, determining if the second dynamic current reading exceeds the predetermined threshold, wherein if it is determined that the second dynamic current reading exceeds the predetermined threshold, sending a signal to prompt a user to replace the corotron in the image production device. | 02-04-2010 |
20100054793 | CORONA DEVICE GRID CLEANER - This is a device for cleaning a corona grid used in electrostatic printing or copying machines. This device has a cleaner pad that cleans the outer surface of the grid, that is the surface closest to the photoreceptor surface. This pad is located between the outer surface of the grid and the surface of the photoreceptor. It can be used together with a cleaner pad that cleans the inner surface of the grid. | 03-04-2010 |
20100054794 | AUTOMATED CLEANER FOR CHARGING - There is provided a corona generating device for a printing machine, including a conductor; a frame for supporting the conductor; a cleaning assembly, within the frame, for cleaning the conductor, the cleaning assembly includes a cleaning carriage, a drive system for translating the cleaning carriage along the length of the conductor in a path of movement, the cleaning assembly further includes a cleaning pad, means for engaging a portion of the clean pad into contact with conductor, and means for translating the cleaning pad from an used portion to an unused portion of the cleaning pad. | 03-04-2010 |
20100067939 | CHARGING APPARATUS - A charging apparatus includes a corona charger which includes a discharging wire and a grid electrode that are configured to charge a member to be charged, a cleaning device configured to clean an inner surface of the grid electrode, and a discharging device configured to electrically discharge the grid electrode before the cleaning device cleans the grid electrode. | 03-18-2010 |
20100092204 | Photoconductor Unit With Charge Roll Wiper for an Image Forming Device - A photoconductor unit for forming a toner image in an image forming device is disclosed. The photoconductor unit comprises a photoconductor drum, a charge roller and a first charge roller wiper. The photoconductor drum receives toner particles for forming the toner image that is transferred onto a media sheet. The charge roller charges the photoconductor drum. A first charge roller wiper is disposed substantially parallel to path along which the charge roller moves between a working position and a storage position. The first charge roller wiper is configured to peripherally contact and clean the charge roller when the charge roller assumes a working position. A second charge roller wiper may be provided adjacent the storage position and disposed substantially perpendicular to the path along which the charge roller moves. | 04-15-2010 |
20100098453 | CHARGE ROLLER CLEANING MEMBER FOR USE IN MEDIA PROCESSING DEVICE - A segmented cleaning member for removing particulate from a charge roller of a media processing device. The cleaning member in one embodiment includes a substrate and an open-cell foam cleaning pad disposed onto the substrate. The cleaning pad is segmented by a plurality of cuts into a plurality of longitudinal sections capable of contacting the charge roller for removing the particulate from the charge roller. Various cut patterns made be used to form the sections. The cleaning member can be used in media processing device and cartridge therefor for removing the particulate from the charge roller. | 04-22-2010 |
20100104315 | APPARATUS FOR CHARGING A PHOTOCONDUCTOR AND CLEANING A SCOROTRON GRID - An apparatus ( | 04-29-2010 |
20100104316 | ELECTROSTATIC CHARGING MEMBER, ELECTROSTATIC CHARGING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - An electrostatic charging member includes a base material; and an outermost layer that contains a porous filler and a resin and has a gel fraction of at least about 50% and a surface roughness Rz in a range of about 2 μm to about 20 μm. | 04-29-2010 |
20100104317 | CLEANING DEVICE OF WIRE, CHARGING DEVICE USING THE SAME AND IMAGE FORMING APPARATUS - A cleaning device of a wire includes: a first cleaning member that cleans a wire when the first cleaning member comes into contact with the wire; a second cleaning member that wipes off the wire when the second cleaning member comes into contact with the first cleaning member while the wire is being interposed between the first and the second cleaning member; and a holding and moving body that holds and reciprocates the first and the second cleaning members in a direction in which the wire is stretched. The second cleaning member is contacted with the wire at a protruding portion in which the second cleaning member protrudes from a rear end portion of the first cleaning member in the direction at least at the time of a going-back movement of the first cleaning member. | 04-29-2010 |
20100119251 | CLEANING DEVICE, CHARGING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A cleaning element for a printer is described. The cleaning element may include a brush, which is used for an image forming apparatus. The brush roller may include a support structure and brush filaments extending therefrom. The brush filaments may be configured to contact a surface of a-member to be cleaned. Thus, it is possible to provide a cleaning lement capable of removing material adhering to the surface of the member to be cleaned. The cleaning element is capable of providing long-term effective cleaning of a member of an image forming apparatus during extended use. | 05-13-2010 |
20100119252 | Process Cartridge Including Cleaning Member for Cleaning Charging Wire - A process cartridge includes a charging wire for charging a photosensitive member and a cleaning member for cleaning the charging wire. When the cleaning member moves from a first position to a second position while sliding on the charging wire, a moving member in a third position is moved to a fourth position. However, the moving member remains in the fourth position when the cleaning member moves from the second position to the first position. | 05-13-2010 |
20100119253 | IMAGE FORMING APPARATUS AND METHOD FOR CLEANING IMAGE CARRIER OF THE IMAGE FORMING APPARATUS - In an image forming apparatus | 05-13-2010 |
20100158558 | IMAGE FORMING APPARATUS - An image forming apparatus includes a photosensitive member configured to form a toner image thereon, a corona charger located opposite the photosensitive member and including a discharging wire and a grid electrode, a bias applying unit configured to apply a bias to the corona charger, a cleaning unit configured to perform cleaning processing by sliding in a longitudinal direction of the grid electrode to rub an inner surface of the grid electrode, and an execution unit configured to execute a cleaning mode for performing the cleaning processing by the cleaning unit while applying a bias of a polarity equal to a normal charging polarity of toner to the grid electrode by the bias applying unit. | 06-24-2010 |
20100209134 | IMAGE FORMING APPARATUS AND COMPUTER READABLE MEDIUM - An image forming apparatus is provided, the image forming apparatus including: a plurality of charging members which apply charging voltage between each charging member and corresponding charged body; a plurality of cleaning members which remove adherent matters by reciprocating in a contact state with each charging member and wait in a waiting position in a non-cleaning time; a plurality of detection units which detect by availability of electric connection whether each cleaning member is located in the waiting position; and a series circuit that connects the detection units in series, wherein when the cleaning members clean the charging members, an outward movement is started from a cleaning member on a side corresponding to one end of the series circuit, and a homeward movement is completed from a cleaning member on a side corresponding to the other end of the series circuit. | 08-19-2010 |
20100247135 | CHARGING DEVICE FOR ELECTRICALLY CHARGING PHOTOSENSITIVE MEMBER - A charging device includes a rotatable charging member for electrically charging a photosensitive member; and a brush, rotating along a rotational direction of the charging member by contacting the charging member to receive a force, including fibers for cleaning the charging member. The fibers have been subjected to fiber-tilting treatment so that the fibers are tilted in a direction counterdirectionally with a rotational direction of the brush. | 09-30-2010 |
20100278553 | AUTOMATED CLEANER FOR A CHARGING DEVICE - An apparatus for controlling a cleaning device for cleaning a charging device, including: means for detecting contamination on the charging device; means, in communication with detecting means, for generating a cleaning command; and a controller, responsive to the cleaning command, for controlling operation of the cleaning system. | 11-04-2010 |
20100296835 | Charger - A charger includes: a discharge wire extending in a predetermined extension direction; an opposite electrode extending in the extension direction and facing to the discharge wire; a frame configured to support the discharge wire and the opposite electrode; and a cleaning member configured to move in the extension direction while slidably contacting with the opposite electrode so as to clean the opposite electrode. The cleaning member includes: a sheet-like member contacting with the opposite electrode; and a support member configured to support the sheet-like member. The sheet-like member has a distal end contacting with the opposite electrode, and a proximal end at an opposite end of the distal end. The support member supports the sheet-like member obliquely relative to the opposite electrode such that the distal end and the proximal end of the sheet-like member are arranged in different positions with respect to the extension direction. | 11-25-2010 |
20110002706 | CHARGING DEVICE AND AN IMAGE FORMING APPARATUS PROVIDED WITH THE CHARGING DEVICE - A charging device has a stainless steel sheet electrode for charging an image bearing member, and a cleaner for cleaning the stainless steel sheet electrode. The stainless steel sheet electrode has a thickness within a range from 50 μm to 60 μm and comprises aligned triangular pins. Each of the triangular pins has a vertex angle within a range from 10 degrees to 30 degrees. The cleaner has two grinding members comprising abrasive grains having an average diameter within a range from 2 μm to 9 μm, and the two grinding members are in contact with, respectively, both main surfaces of the sheet electrode. The cleaner and the sheet electrode are moved relative to each other at a constant speed by a force equal to or less than 2N. | 01-06-2011 |
20110002707 | CHARGING DEVICE AND AN IMAGE FORMING APPARATUS PROVIDED WITH THE CHARGING DEVICE - A charging device has a sheet electrode with triangular pins aligned in a first direction and a cleaner unit for cleaning the sheet electrode while moving in the first direction and in a second direction opposite to the first direction. The cleaner unit has a grinding member for grinding the sheet electrode, a first collecting member, which is disposed downstream in the first direction from the grinding member, for collecting extraneous matter, a second collecting member, which is disposed downstream in the second direction from the grinding member, for collecting extraneous matter, and a switching section for changing a contact state of the first collecting member with the sheet electrode and a contact state of the second collecting member with the sheet electrode. While the cleaner unit is moving in the first direction, the second collecting member is pressed against the sheet electrode with greater force than the first collecting member is pressed against the sheet electrode, and while the cleaner unit is moving in the second direction, the first collecting member is pressed against the sheet electrode with greater force than the second collecting member is pressed against the sheet electrode. | 01-06-2011 |
20110013928 | CHARGING UNIT, MANUFACTURING METHOD FOR CHARGING UNIT, PROCESS CARTRIDGE AND IMAGE FORMING DEVICE - A charging unit is provided, the charging unit including: a charging member; and a charging member clean-up member having an elastic layer, the elastic layer containing a silicon oil, wherein a silicone concentration in analyzing the charging member by an x-ray photoelectron spectroscopy satisfies following condition: about 1 atm %≦(difference between the maximum value and the minimum value of the silicone concentration in Si2p detected by the x-ray photoelectron spectroscopy above the charging member)≦about 3 atm %. | 01-20-2011 |
20110020029 | CHARGER, IMAGE FORMING APPARATUS AND METHOD FOR CLEANING CHARGER - In an embodiment, a charger including: an electrode to support a plurality of pins lined up at a certain pitch in a longitudinal direction; and a scraper with an edge face not vertical but tilted in the longitudinal direction of the electrode to scrape the pins. | 01-27-2011 |
20110058844 | CHARGER, IMAGE FORMING UNIT AND IMAGE FORMING APPARATUS - A charger includes: a first electrode; a second electrode that has a mesh pattern and is arranged on a side closer to a photoconductor than the first electrode; a cleaner that moves along the second electrode to clean the second electrode by a brush thereof. The second electrode has the mesh pattern successively arranged in a certain direction, and a peripheral region of the mesh pattern of the second electrode has been changed to prevent catching of the brush of the cleaner. | 03-10-2011 |
20110069988 | DETACHABLE HOLDING PORTIONS IN AN IMAGE FORMING APPARATUS - There is provided an image forming apparatus including: an image carrier carrying an image; a charging roll charging the image carrier; a cleaning member configured to be brought into contact with the charging roll for cleaning the charging roll; a first holding portion detachably provided in an apparatus main body for holding the image carrier; and a second holding portion provided within the apparatus main body independently from the first holding portion, for holding the cleaning member. | 03-24-2011 |
20110170896 | CLEANING MEMBER, CHARGING DEVICE, TRANSFER DEVICE, ASSEMBLY, AND IMAGE FORMING APPARATUS - The cleaning member of the present invention includes a rotatably supported core; and a foam body that is disposed in a spiral shape on the core, and has at least one edge in a cross-section orthogonal to the length direction of the foam body that projects out further in the core radial direction than a central portion of the foam body. | 07-14-2011 |
20110170897 | CLEANING MEMBER FOR IMAGE FORMING APPARATUS, CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - The present invention provides a cleaning member for an image forming apparatus, including: an axle; and a belt-like elastic medium that is wound on the outer circumferential surface of the axle in a spiral shape and that includes a first edge portion in at least one of both ends in the width direction thereof and a second edge portion coming in contact with a surface to be cleaned at an angle different from that of the first edge portion. | 07-14-2011 |
20110170898 | CLEANING MEMBER FOR IMAGE FORMING DEVICE, CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING DEVICE - A cleaning member | 07-14-2011 |
20110170899 | CLEANING MEMBER, CLEANING DEVICE, ASSEMBLY, AND IMAGE FORMING DEVICE - A cleaning member has a core member that is freely rotatable, a cleaning material that is spirally wound around an outer peripheral surface of the core member, and holding members. The holding members hold end portions of the cleaning material by the end portions being nipped between the holding members and the outer peripheral surface of the core member. An opening is provided in each of the holding members. Each of the openings is continuously open in line with an axial direction of the core member, and the cleaning material is exposed from the openings. | 07-14-2011 |
20110170900 | CLEANING BODY, CLEANING DEVICE, CHARGING DEVICE, ASSEMBLY, AND IMAGE FORMING DEVICE - A cleaning body has: a shaft; a cleaning member that is spirally wound around the shaft, and that has an elastic layer and an adhesive layer whose obverse is adhered to the elastic layer and whose reverse is adhered to the shaft; and a contacting member that is provided at least one end portion in an axial direction of the shaft, and that contacts the adhesive layer at a position away from an circumferential surface of the shaft. The cleaning body causes the elastic layer to contact a body to be cleaned, and cleans a body to be cleaned. | 07-14-2011 |
20110170901 | CLEANING MEMBER FOR IMAGE FORMING APPARATUS, CHARGING DEVICE, UNIT FOR IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - The present invention provides a cleaning member for an image forming apparatus, including: a shaft body; and an elastic material that is wound on the outer peripheral surface nun of the shaft body in a spiral shape, the elastic material satisfying the following expressions. (A1): 107-14-2011 | |
20110170902 | CLEANING BODY, CLEANING DEVICE, CHARGING DEVICE, ASSEMBLY, AND IMAGE FORMING DEVICE - A cleaning body includes: a shaft portion; and a porous member that is mounted to an outer periphery of the shaft portion at an incline with respect to an axial direction of the shaft portion, and in which plural cavities are formed, wherein the porous member has projecting portions that project toward a radial direction outer side of the shaft portion in a cross-section along the axial direction of the shaft portion, and the projecting portions contact a body to be cleaned and clean the body to be cleaned, and lengths, along a radial direction of the shaft portion, of the plural cavities are longer than lengths along the axial direction of the shaft portion. | 07-14-2011 |
20110200352 | IMAGE FORMING APPARATUS AND CLEANING METHOD OF CHARGING ROLLER - An image forming apparatus includes a photoreceptor, a charging roller and a guide member. The guide member is disposed near an outer circumferential surface of the charging roller, and extends in an axial direction of the charging roller, a cleaning member for cleaning the charging roller is engaged with and disengaged from the guide member, and the guide member guides the cleaning member in the axial direction of the charging roller. | 08-18-2011 |
20110236052 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, CLEANING APPARATUS, AND CLEANING METHOD - An image forming apparatus includes a member to be cleaned and a cleaning roller driven by contact with the member to be cleaned, and the apparatus is configured such that abrasive grains and at least one of a release agent and a solid lubricant are supplied to the member to be cleaned and that the supplied abrasive grains and the supplied at least one of a release agent and a solid lubricant move on a surface of the member to be cleaned in an axial direction of the cleaning roller. | 09-29-2011 |
20110262179 | CHARGING DEVICE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND TONER - A cleaning roller cleaning a surface of a cleaning component, wherein the cleaning roller is provided in a roller configuration having a cylindrical shape and has a portion in contact with the cleaning component, the portion being made of a melamine resin foam having a continuous foam structure, the melamine resin foam being provided by heating compression from an original configuration in a radial direction, and wherein the portion in contact with the cleaning component has a continuous foam structure and a tensile strength in a range of 1.7±0.5 kg/cm | 10-27-2011 |
20110274459 | IMAGE FORMING APPARATUS, CHARGING APPARATUS AND CLEANING METHOD OF CHARGING APPARATUS - An image forming apparatus according to an embodiment includes an image carrier which is irradiated with a laser beam to form an electrostatic latent image, and a charging device which is disposed in parallel to the image carrier and includes an electrode that charges an electric charge to the image carrier. The charging device has a cleaning device which includes a container accommodating a cleaning member abutting an end portion of a discharge side of the electrode, moves the container along the longitudinal direction of the electrode, removes foreign matter attached to the electrode by the cleaning member, and accommodates the foreign matter in the container. | 11-10-2011 |
20110318045 | CLEANING ELEMENT FOR AN IMAGE-FORMING APPARATUS, CHARGING DEVICE, PROCESS CARTRIDGE AND IMAGE-FORMING APPARATUS - A cleaning element for an image-forming apparatus, includes: a shaft; a strip-shaped sheet which is disposed helically on an outer circumferential surface of the shaft; and an adhesive layer which is disposed between the shaft and the strip-shaped sheet and binds the shaft and the strip-shaped sheet, the strip-shaped sheet having, on a surface thereof facing the shaft, an unbound region in which the adhesive layer is absent, at an end in a width direction of the strip-shaped sheet which faces a downstream side in a rotation direction of the shaft. | 12-29-2011 |
20110318046 | CLEANING DEVICE AND IMAGE FORMING APPARATUS - There is provided a cleaning device including: a cleaning member disposed that cleans the discharge member; a guide member disposed along the length direction of the discharge member and guides the cleaning member in the length direction of the discharge member; and a drive device which, when executing a cleaning operation where the drive device reciprocally moves the cleaning member along the guide member from a standby position set on one length direction end portion of the discharge member or a return operation where the drive device returns the cleaning member along the guide member to the standby position, applies to the cleaning member a driving force in an opposite direction of a moving direction in which movement of the cleaning member is to be started and thereafter applies to the cleaning member a driving force in the moving direction. | 12-29-2011 |
20110318047 | CLEANING MEMBER FOR IMAGE FORMING APPARATUS, CHARGING DEVICE, UNIT FOR IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A cleaning member for an image forming apparatus includes a core and an elastic layer helically put on an outer peripheral surface of the core and including a first elastic layer and a second elastic layer, the first elastic layer being the outermost layer and the second elastic layer being located closer to the core than the first elastic layer and having a compression set smaller than that of the first elastic layer. | 12-29-2011 |
20120002998 | CLEANING MEMBER FOR IMAGE FORMING APPARATUS, CHARGING DEVICE, UNIT FOR IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A cleaning member for an image forming apparatus includes a core and an elastic layer that is formed by a strip-shaped elastic member helically wound around an outer peripheral surface of the core. The cleaning member satisfies the following formula (1): | 01-05-2012 |
20120002999 | IMAGE FORMING DEVICE HAVING CHARGING WIRE CLEANING MECHANISM - An image forming device including an accommodating member, a moving section, a driving section, a transmitting section, and first and second switching sections. The accommodating member is movable between an accommodating position and a pulled-out position. A charger includes a charging wire and a wire cleaner movable therealong. The moving section is configured to move the wire cleaner. The driving section is configured to generate a drive force to move the moving section. The transmitting section is movable to one of a first path on which the transmitting section is drivingly connected to the driving section and a second path on which the transmitting section is disconnected from the driving section. The transmitting section is configured to transmit the drive force from the driving section to the moving section when the transmitting section is moved to the first path. The first switching section is configured to switch a position of the transmitting section from the second path to the first path. The second switching section is configured to switch a position of the transmitting section from the first path to the second path. | 01-05-2012 |
20120027452 | ELECTROSTATIC CHARGER DEVICE AND IMAGE FORMING APPARATUS - An electrostatic charger device according to this invention includes a cleaner member, an operating rod, a guide portion, and a bending member. The cleaner member is configured to clean an electrode housed in a housing by pressing against the electrode. The operating rod has one end in a longitudinal direction to which the cleaner member is fixed. The guide portion is disposed at one end of the housing in a primary scanning direction and has a through-hole through which the operating rod extends in the longitudinal direction, the guide portion supporting the operating rod to enable the cleaner member to reciprocate between a first position and a second position. The bending member is configured to bend the operating rod in such a manner that an intermediate portion of the operating rod projects away from an image bearing member when the cleaner member is in the first position. | 02-02-2012 |
20120063804 | CHARGING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A charging device includes a charging member that is arranged close to a rotating charge target member, and charges a charge target surface of the charge target member while rotating, a cleaning member that makes friction contact with the charging member to cause the charging member to be driven and rotated, and cleans a surface of the charging member, and a cleaning member driving part to rotate and drive the cleaning member. | 03-15-2012 |
20120070183 | IMAGE FORMING APPARATUS - An image forming apparatus includes a cleaning member for cleaning a grid electrode of a corona charger and includes a sheet-like member for opening and closing an opening of the corona charger. The cleaning member is located above the sheet-like member with respect to a direction of gravitation, and wherein the sheet-like member is present right below the cleaning member when the cleaning member is present in an image formation range with respect to a longitudinal direction of the grid electrode. | 03-22-2012 |
20120076528 | CLEANING UNIT, CLEANING DEVICE, CHARGING DEVICE, ASSEMBLY, AND IMAGE FORMING APPARATUS - A cleaning unit includes a shaft that is rotatable; an elastic layer that is spirally wound around and fixed to the shaft, the elastic layer contacting and cleaning the object to be cleaned; a pressed portion that protrudes from each end portion of the elastic layer in an axial direction of the shaft, in a part of the each end portion with respect to a width direction of the elastic layer; and a pressing member that is arranged at an end portion of the shaft in the axial direction, the pressing member pressing the pressed portion between the pressing member and the shaft. | 03-29-2012 |
20120076529 | CLEANING BODY, CLEANING DEVICE, CHARGING DEVICE, ASSEMBLED BODY, AND IMAGE FORMING APPARATUS - A cleaning body is provided including: a rotating axial member; an elastic layer, fixed to the axial member, contacting a body to be cleaned and cleaning the body to be cleaned; a held portion projecting out towards the axial member axial direction outside from an axial direction end portion of the elastic layer; a holding member provided at an axial direction end portion of the axial member and holding the held portion between the holding member and the axial member; and a cleaning portion including an incision formed in a width direction central portion of the end portion of the elastic layer, formed such that the incision is open by the held portion being held by the holding member, the cleaning portion contacting an end portion of the body to be cleaned and cleaning the end portion of the body to be cleaned. | 03-29-2012 |
20120076530 | CLEANING MEMBER, CLEANING DEVICE, AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A cleaning member includes a columnar body; and a strip-shaped body made of an elastic porous material, the strip-shaped body being helically wound around a peripheral surface of the columnar body. In a width direction of the strip-shaped body, a height of a surface of the strip-shaped body from a central axis of the columnar body is larger at a first end of an exposed part of the strip-shaped body than at a second end of the exposed part. | 03-29-2012 |
20120082475 | CHARGING DEVICE, METHOD FOR PRODUCING CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A charging device includes: a charging component, and a cleaning member for the charging component, containing a substrate and an elastic layer that contains a silicone oil and is arranged in a spiral form on an outer surface of the substrate, the charging device being satisfying a following formula: | 04-05-2012 |
20120107012 | Charging Device, Process Cartridge Incorporating Same, And Image Forming Apparatus Incorporating Same - A charging device, which is incorporable in a process cartridge and an image forming apparatus, includes a charging roller and a cleaning device. The charging roller charges an image bearing member having a surface on which an electrostatic latent image is formed. The cleaning device cleans the charging roller. The cleaning device includes a cleaning roller, a shaft, and support members. The cleaning roller contacts the surface of the charging roller to clean the surface. The support members rotatably support the cleaning roller, each of which including a slot. The slot allows a variable distance between the charging roller and the cleaning roller, and is inclined, in the direction of rotation of the charging roller, relative to a straight line connecting the rotation center of the charging roller and the rotation center of the cleaning roller. | 05-03-2012 |
20120163854 | DISCHARGER AND IMAGE FORMING APPARATUS - A discharger includes a discharger main body that is adapted to be attached to and detached from a holding member of an image forming apparatus, a first electrode member that is formed of a wire rod, a second electrode member, a voltage for discharge being applied between the first and second electrode members, an electrode cleaning member that cleans the first electrode member, a detected portion that is integrally disposed to the electrode cleaning member, a detecting member that detects the detected portion while the electrode cleaning member is in a predetermined reference position, a cleaning member conveyer that conveys the electrode cleaning member in both directions which toward and away from the reference position, and a movement control unit that controls a movement of the cleaning member conveyer by the conveyer. | 06-28-2012 |
20120224881 | CHARGING DEVICE AND IMAGE FORMING APPARATUS - A charging device includes a charging member that charges an outer peripheral surface of a cylindrical latent-image carrier; an electrode member including a curved portion that is formed by press working so as to extend along the outer peripheral surface of the latent-image carrier, the curved portion having an electrode to which a voltage is applied, the electrode being disposed between the charging member and the latent-image carrier; a cleaning member that is movable along the curved portion in an axial direction of the latent-image carrier and that cleans the electrode; and a receiving portion formed in the curved portion at a position outside the electrode, the receiving portion receiving the cleaning member to release a contact pressure between the curved portion and the cleaning member. | 09-06-2012 |
20120230721 | CLEANING DEVICE, CHARGING DEVICE, AND IMAGE FORMING APPARATUS - A cleaning device includes a cleaning member provided at a first side of a curved grid electrode plate that is curved in a short-side direction, the cleaning member being pressed against the curved grid electrode plate to clean the first side thereof; a receiving member provided at a second side of the curved grid electrode plate, the receiving member receiving a pressing load applied by the cleaning member; and a moving unit that moves the cleaning member and the receiving member in a long-side direction of the curved grid electrode plate. The cleaning member and the receiving member are formed such that a pressure based on the load that is applied to an end portion of the curved grid electrode plate in the short-side direction is higher than that applied to a central portion of the curved grid electrode plate in the short-side direction. | 09-13-2012 |
20120230722 | CLEANING DEVICE, CHARGING UNIT, IMAGE BEARING UNIT, AND IMAGE FORMING APPARATUS - A cleaning device includes a device body, a cleaning member, and a support member. The device body is moved in a longitudinal direction of a plate-like grid member of a charging device. The cleaning member is disposed in the device body and cleans a first face of the grid member while pressing against the first face when the device body is moved. The support member is provided in the device body and has a support surface that is in contact with and supports a second face opposite to the first face of the grid member pressed by the cleaning member. The support surface is in contact with a mesh portion and a non-mesh portion of the grid member. | 09-13-2012 |
20120257905 | DISCHARGER AND IMAGE FORMING APPARATUS - A discharger includes a discharging member that faces a member to be charged and discharges electricity by applying voltage thereto; and a grid member that is disposed between the discharging member and the member to be charged and regulates electric discharge from the discharging member. The grid member has holes with a predetermined shape that extend therethrough from the discharging member toward the member to be charged, and has a first region with the holes arranged at a first inclination angle, a second region with the holes arranged at a second inclination angle, and a boundary between the first and second regions that extends in the direction of the discharging member. When the first region is symmetrically projected onto the second region with respect to the boundary, arrangement patterns of the holes in the first and second regions are positionally displaced relative to each other. | 10-11-2012 |
20120275814 | ELECTROPHOTOGRAPHIC PRINTER WITH CHARGING-ROLLER CLEANER - An electrophotographic printer includes a rotatable member and a carriage rotatable around an axis. Two rotatable chargers are mounted on the carriage, each for charging the rotatable member. A carriage drive rotates the carriage to bring the first charger into contact with the rotatable member and the second charger into operative arrangement with a cleaner, or vice versa. A charger drive rotates the charger in operative arrangement with the cleaner at a speed greater than a selected speed or with a torque greater than a selected torque, and the rotatable member rotates the rotatable charger in contact therewith at the selected speed with the selected torque. | 11-01-2012 |
20130034367 | CHARGING DEVICE - In a configuration in which a carriage jumps at an end of a screw without using a sensor for detecting a position, when a load for moving the carriage in a longitudinal direction is increased, the carriage jumps at an unintended position of a charging wire. An urging member is regulated not to be displaceable greater than a difference between a concave portion and a convex portion of the screw when the regulation member is at a regulation position, and is displaceable greater than the difference between the concave portion and the convex portion of the screw when the regulation member is at a retreat position. | 02-07-2013 |
20130058679 | CHARGER AND IMAGE FORMING APPARATUS - A charger adapted to uniformly charge a surface of an image bearing member is provided. The charger includes a charging roller, a charging roller cleaning member, and a cleaning member moving device. The charging roller is in contact with a surface of the image bearing member and is rotatable. The charging roller cleaning member is in uniform contact with the charging roller in a longitudinal direction. The cleaning member moving device is adapted to reciprocate the charging roller cleaning member in a direction orthogonal to the longitudinal direction of the charging roller while keeping the charging roller cleaning member in contact with the charging roller. | 03-07-2013 |
20130077988 | IMAGE FORMING APPARATUS - An image forming apparatus has a latent image forming portion that includes a latent image supporting body, and a supporting member disposed at both ends of the latent image supporting body, a charging unit that includes a discharge electrode supplying electric charge to the latent image supporting body, and a control electrode controlling a potential of the latent image supporting body, a cleaning member that makes one end of the control electrode located at a stand-by position and is reciprocally moved so as to clean the control electrode, and a movement portion that moves the charging unit to a first position when charging the latent image supporting body, and moves the charging unit to a second position which is further spaced from the latent image forming portion than the first position when the control electrode is cleaned by the cleaning member. | 03-28-2013 |
20130089354 | CLEANING MEMBER FOR IMAGE FORMING APPARATUS, CHARGING DEVICE, UNIT FOR IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS - A cleaning member for an image forming apparatus, includes a core, a foamed elastic layer disposed by winding a strip-shaped foamed elastic member on an outer peripheral surface of the core in a helical form so as to extend from one end of the core to the other end, and a bonding layer for bonding the core and the foamed elastic layer together, wherein the area of a region within a surface at one or both ends at least in a longitudinal direction of the foamed elastic layer on a side facing the outer peripheral surface of the core, contacting the outer peripheral surface of the core via the bonding layer is substantially 35% or more by area ratio per unit area. | 04-11-2013 |
20130094878 | CHARGING DEVICE - A charging device includes a corona charger including a grid electrode, a cleaning member configured to clean the grid electrode, a sheet-type shutter configured to open/close an opening of the corona charger, and a drive source configured to drive both the cleaning member and the shutter in a longitudinal direction of the corona charger, wherein the cleaning member is provided such that a cleaning ability thereof is higher in a case where the cleaning member and the shutter are moved in a closing direction of the opening of the corona charger than in a case where the cleaning member and the shutter are moved in an opening direction of the opening of the corona charger. | 04-18-2013 |
20130094879 | CHARGING DEVICE - A charging device includes a corona charger including a grid electrode, a cleaning member configured to clean the grid electrode, a sheet-type shutter configured to open/close an opening of the corona charger, a drive source configured to drive both the cleaning member and the shutter in a longitudinal direction of the corona charger, and a control unit configured to control drive of the drive source such that, when the shutter is moved in a closing direction of the opening of the corona charger after image formation is finished, the cleaning member and the shutter are driven at a first speed, and when the shutter is moved in an opening direction of the opening of the corona charger at least from when power is turned on until image formation is started, the cleaning member and the shutter are driven at a second speed higher than the first speed. | 04-18-2013 |
20130108311 | CLEANING MEMBER FOR IMAGE FORMING APPARATUS, CHARGING DEVICE, UNIT FOR IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS | 05-02-2013 |
20130136486 | IMAGE FORMING APPARATUS AND CLEANING CONTROL METHOD - In an image forming apparatus for forming an image by electrophotography, a charging device is comprised of a needle electrode in which a plurality of saw teeth are arrayed in one direction; a cleaning rubber roller that cleans the needle electrode; a cleaning member supporter; a moving portion that moves the cleaning member supporter; and a control portion that controls the charging device, and the control portion includes a function to increase a saw-tooth current value by increasing print cumulative count; and a function to decrease the saw-tooth current value at the time of performing cleaning. | 05-30-2013 |
20130149001 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - An electrophotographic image forming apparatus includes a photoreceptor forming an electrostatic latent image on a surface thereof, a charging roller being in contact with the photoreceptor to uniformly charge the surface thereof, a developing device forming a toner image on the photoreceptor, and a cleaning device cleaning contaminants on a surface of the charging roller, in which the charging roller has a conductive elastic layer formed around an axis and a direction of polishing marks on the surface of the charging roller is in a circumferential direction. | 06-13-2013 |
20130156461 | CHARGING DEVICE AND IMAGE FORMING APPARATUS - A charging device includes a discharge electrode that charges a surface of a rotatable image carrier and extends along the image carrier, a case that extends along and encloses the discharge electrode with a side thereof nearest to the image carrier being open, a grid electrode provided between the image carrier and the discharge electrode, a cleaning member that cleans at least one of the discharge electrode, the case, and the grid electrode by moving along the case, a regulating portion that is provided between the cleaning member and the case and regulates a distance between the cleaning member and the case in a direction orthogonal to the direction of movement of the cleaning member by coming into contact with the cleaning member or the case, and a supporting portion that supports the regulating portion and allows the regulating portion to move away from the cleaning member or the case. | 06-20-2013 |
20130164023 | Photosensitive Member Unit - A photosensitive member unit includes: a first image forming unit including a first photosensitive member rotatable on a first axis line; and a second image forming unit including a second photosensitive member rotatable on a second axis line parallel with the first axis line and disposed in parallel with the first image forming unit at a first side in an orthogonal direction perpendicular to the first and second axis lines. The first image forming unit includes a charger and a cartridge containing portion. The charger includes: a charging member; a cleaning member for cleaning the charging member; and an operating member for operating the cleaning member. The operating member is inoperable when the developing cartridge is installed in the cartridge containing portion, and is exposed to be operable in the cartridge containing portion when the developing cartridge is removed from the cartridge containing portion. | 06-27-2013 |
20130251393 | CHARGING DEVICE, IMAGE FORMING STRUCTURE, AND IMAGE FORMING APPARATUS - A charging device includes a charging member that includes a rotating shaft and charges a surface of a charging object while rotating in contact with the charging object, a cleaning member that includes a rotating shaft and removes unwanted matter from a surface of the charging member while rotating in contact with the charging member, and a bearing member that includes first and second receiving portions each having an open part on one side thereof and a substantially concave-shaped bottom on another side thereof. The first and second receiving portions receive circumferences of the rotating shafts of the charging member and the cleaning member, respectively, at the bottoms thereof. The open parts of the first receiving portion and the second receiving portion face respectively different directions. A part of an inner surface of the second receiving portion forms a part of an outer surface of the first receiving portion. | 09-26-2013 |
20130259513 | CLEANING MEMBER AND CHARGING DEVICE, UNIT FOR IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A cleaning member includes a core member, a foamed elastic layer in which fillers are filled in bubbles of a foamed elastic layer that are present at a surface of a side opposing to an outer circumferential surface of the core member in at least one side or both sides of ends in a longitudinal direction in the foamed elastic layer that is disposed so as to helically wind a strip shaped foamed elastic member from one end of the core member to the other end thereof in the outer circumferential surface of the core member, and a bonding layer that bonds the core member and the foamed elastic layer. | 10-03-2013 |
20130315615 | CHARGING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A charging device has a charging member to charge an object, an applying unit to apply a voltage to the charging member for generating an electric discharge from the charging member, so that the object is discharged by the charging member, a detecting unit to detect an emission of light of the electric discharge, an output unit to output a detection result by the detecting unit, a cleaning unit to clean the charging member, and a controller to control the cleaning unit to clean the charging member when the detection result is out of a predetermined range. | 11-28-2013 |
20140023392 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier, a charge roller, a cleaning brush and a distance changing mechanism. The charge roller includes a surface having protrusions and depressions and to electrically charge the image carrier. The cleaning brush includes a brush part cleaning the surface of the charge roller and a main body part supporting the brush part. The brush part includes a top end part and a belly part being nearer to the main body part than the top end part. The distance changing mechanism changes a distance between the charge roller and main body part so that, by adjusting the distance to a first distance, the top end part contacts with the depression and, by adjusting the distance to a second distance shorter than the first distance, the belly part contacts with the protrusion. | 01-23-2014 |
20140037320 | ROLLER HAVING MULTIPLE WRAPPED STRIPS - A roller according to one example embodiment includes a rotatable shaft and a plurality of strips wrapped around the shaft in an alternating relationship. The strips differ from each other in at least one of material, height and width. In one embodiment, the strips are spirally wrapped around the shaft. Each strip may be formed, for example, from a foam material, a felt material or a brush material. | 02-06-2014 |
20140044448 | CHARGING DEVICE - A grid of a charging device is cleaned without causing the grid to contact a member to be charged. In this structure, to suppress non-uniform charging due to wear of the grid, which is pulled toward a discharge electrode, for a long time, first and second protective layers are provided. The first protective layer is provided on a surface of a base member of the grid that faces the cleaning member. The second protective layer is provided on a surface of the base member that faces the pressing member. The second protective layer is thicker than the first protective layer. | 02-13-2014 |
20140044449 | CHARGING DEVICE - A shutter that suppresses accumulation of discharge products on a photosensitive member is disposed between a grid and the photosensitive member. In this structure, to suppress corrosion of the grid due to the discharge products for a long time, first and second protective layers are provided. The first protective layer is provided on a surface of a base member of the grid that faces the discharge electrode. The second protective layer is provided on a surface of the base member that faces the shutter. The second protective layer is thicker than the first protective layer. | 02-13-2014 |
20140099141 | CLEANING MEMBER, CHARGING DEVICE, ASSEMBLY, AND IMAGE FORMING APPARATUS - A cleaning member includes a shaft body and a spiral portion including a contact portion that is formed on an outer peripheral surface of the shaft body, protrudes spirally, and comes into contact with a body to be cleaned with the rotation of the shaft body, steps that are formed on the contact portion and face a rotation direction of the shaft body and an end portion that is positioned on a side where the contact portion comes into contact with the body to be cleaned first in a width direction of the contact portion and of which the height from the shaft body is gradually reduced from the height of the contact portion so that the end portion does not come into contact with the body to be cleaned. | 04-10-2014 |
20140119769 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE THEREFOR - An image forming apparatus includes a rotatable image bearer, a charging member to contact a surface of the image bearer and charge the image bearer, an exposure device to expose the image bearer and form a latent image, a developing device to develop the latent image on the image bearer into a toner image, a transfer device to transfer the toner image from the image bearer onto a transfer medium, and a cleaning blade to contact the surface of the image bearer and remove toner from the image bearer after image transfer. The charging member has surface unevenness created by projections and recesses extending in a direction of rotation of the image bearer. The cleaning blade is configured to abrade projections formed on the surface of the image bearer. | 05-01-2014 |
20140169826 | IMAGE FORMATION UNIT AND IMAGE FORMATION APPARATUS - An image formation unit includes a rotatable image carrier, a charge member configured to electrically charge a surface of the image carrier, a charge cleaning member including cell marks in a surface layer thereof and configured to clean a surface of the charge member, a first cleaning member configured to clean the surface of the image carrier, and a second cleaning member including cell marks in a surface layer thereof and provided downstream of the first cleaning member in a rotation direction of the image carrier. The cell density of the charge cleaning member is equal to or more than the cell density of the second cleaning member. | 06-19-2014 |
20140205312 | SYSTEMS AND METHODS FOR CLEANING BIAS CHARGE ROLL SURFACE IN PRINTING SYSTEMS - A vibration-assisted bias charge roll cleaning system includes a bias charge roll cleaning member connected to an actuator for causing the cleaning member to vibrate. The actuator is controlled to vibrate according to a predetermined pattern, and at desired frequencies at particular modes. The cleaning member is configured to be movable to a contact-cleaning position and a cleaning member cleaning position at which the cleaning member is separate from the charge roll. | 07-24-2014 |
20140233980 | DUAL ROLL SYSTEM INTEGRATING A DELIVERY ROLL AND A CLEANING ROLL TO EXTEND THE LIFETIME OF THE BCR SYSTEM - An image forming apparatus comprises an electrophotographic photoconductive member, a charging unit, a delivery unit and a cleaning unit. The charging unit is disposed in contact with the surface of the photoconductive member and the delivery unit disposed in contact with the surface of the charging unit. The delivery unit applies a layer of functional material to a surface of the charging unit and the charging unit in turn applies a layer of the functional material onto the surface of the photoconductive member. The cleaning unit is disposed in contact with a surface of the charging unit to clean the charging unit and reduce contamination of a surface of the delivery unit. The cleaning unit is disposed in an upstream direction of the delivery roller relative to a rotation direction of the charging unit. | 08-21-2014 |
20140294430 | CHARGING DEVICE, ASSEMBLY, AND IMAGE FORMING APPARATUS - A charging device includes a charging member and a cleaning member. The charging member is driven and rotated while in contact with an outer peripheral surface of an image carrier which rotates, and charges the image carrier. The cleaning member is driven and rotated while in contact with an outer peripheral surface of the charging member and cleans the outer peripheral surface of the charging member. In the charging device, a radius of the charging member is less than a radius of the cleaning member. | 10-02-2014 |
20140294431 | Charging Device Provided with Cleaner for Cleaning Electrode - There is provided a charging device including: a discharge electrode extending in a first direction; and a cleaning member configured to move in the first direction to clean the discharge electrode. The cleaning member includes a rigid member in contact with the discharge electrode, and a cushion member supporting the rigid member. The cushion member is positioned opposite to the discharge electrode with respect to the rigid member. | 10-02-2014 |
20140341608 | CHARGING DEVICE, AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A charging device includes a housing, a charging roller, and a brush roller. The housing is disposed adjacent to an optical path of light emitted an the exposure device to irradiate a photoconductor. Charging roller is rotatably supported in housing, and is configured to charge a circumferential surface of the photoconductor through contact. Brush roller is rotatably supported in housing together with charging roller, has multiple brush hairs flocked on a base shaft thereof extending in a longitudinal direction of the charging roller, and is configured to clean a surface of charging roller when brush hairs are brought in contact with charging roller. Furthermore, a predetermined segment of housing is located in a space within a predetermined distance toward a side of housing from the optical path, and is formed from a material having a charge property equivalent to that of the brush hairs. | 11-20-2014 |
20140363194 | CLEANING BRUSH, CHARGING DEVICE, AND IMAGE FORMING APPARATUS - A cleaning brush includes bristles that have ends which come into contact with an object to be cleaned having irregularities on a surface thereof, and a brush base on which the bristles are arranged. The bristles include first bristles and second bristles. The first bristles have a thickness too great to reach bottoms of recessed portions of the irregularities on the surface of the object to be cleaned. The second bristles have a thickness small enough to reach the bottoms of the recessed portions of the irregularities on the surface of the object to be cleaned. | 12-11-2014 |
20150043940 | IMAGE FORMING UNIT AND IMAGE FORMING APPARATUS - An image forming unit includes a charging roller, a cleaning roller, a bush member, and a shifting mechanism. A first journal portion of the bush member allows the charging roller to shift in a direction of abutment against and separation from a photosensitive drum and journals the charging roller with play in the direction of abutment and separation when the charging roller is free from nip with the photosensitive drum. When the charging roller forms a nip with the photosensitive drum by the movement of the bush member actuated by the shifting mechanism, the first journal portion journals the charging roller so that the charging roller is pressed by the photosensitive drum to shift to a position within the first journal portion close to the cleaning roller. | 02-12-2015 |
20150043941 | CHARGING DEVICE - A charging device includes: a casing provided with an opening opposing a member-to-be-charged; a discharging wire provided in the casing; a grid electrode provided in the opening; a shutter for opening and closing the opening; a cleaning member for cleaning the grid electrode; and a moving mechanism for reciprocating the shutter and the cleaning member along a longitudinal direction of the opening. The moving mechanism includes a driving member for being rotationally driven, a first moving member, held by the driving member, for moving the shutter with rotational drive of the driving member, and a second moving member, held by the driving member, for moving the cleaning member with the rotational drive of the driving member. The charging device further includes: a mechanism for forming an interval between the shutter and the cleaning member so that the cleaning member moves in advance of the shutter by a predetermined distance when the shutter moves in a closing direction; and a stopper for stopping movement of the cleaning member, and the second moving member includes a holding portion for permitting idling when the shutter moves in the closing direction toward the cleaning member, stopped by the stopper, with rotation of the driving member. | 02-12-2015 |
20150063860 | CHARGING DEVICE - A charging device includes: a discharging electrode; a casing surrounding the discharging electrode and being provided with an opening in a member-to-be-charged side; a grid electrode provided in the opening and provided with a mesh portion having a plurality of through holes; a cleaning brush, including a base material and a plurality of fibers held on the base material, for cleaning the grid electrode by entrance of a part of the fibers into the through holes while contacting a surface of the grid electrode in the discharging electrode side; a shutter capable of shielding between the member-to-be-charged and the grid electrode; and a moving mechanism for moving the cleaning brush and the shutter along a longitudinal direction of the grid electrode. When the shutter is moved in a closing direction, the cleaning brush moves in advance of a leading end portion of the shutter with respect to the closing direction by a predetermined interval or more. | 03-05-2015 |
20150098725 | CHARGING UNIT, IMAGE FORMING APPARATUS, AND CHARGING UNIT SUPPORT MEMBER - Provided is a charging unit including a charging member that is provided and comes in contact with a surface of an image holding member holding an image to charge the image holding member, a cleaning member that is provided and comes in contact with a surface of the charging member to clean the charging member, and a support member that includes a first support portion which is provided with an opening portion that opens in a direction intersecting rotating shafts of the charging member and the cleaning member, and which supports one end of the charging member is inserted through the opening portion to support the one end of the charging member, and a second support portion which is formed by being connected to the first support portion and which supports one end of the cleaning member which is inserted from the opening portion through the first support portion. | 04-09-2015 |
20150147083 | CHARGER AND IMAGE FORMING APPARATUS - A charger is provided. The charger includes a discharge electrode, a cleaner, and a holder. The discharge electrode is composed of a wire, and the wire has a surface plated with palladium. The cleaner removes foreign substances adhered to the discharge electrode. The cleaner includes a first cleaner composed of a glass-containing resin and a second cleaner. The first cleaner scrapes off the foreign substances by press-contacting the wire while moving, and the second cleaner wipes off the foreign substances by press-contacting the wire while moving. The holder movably holds the cleaner in a direction parallel to the discharge electrode. | 05-28-2015 |
20150331349 | CLEANING MEMBER, CHARGING APPARATUS, AND IMAGE FORMING APPARATUS - Provided is a cleaning member, including a shaft material that rotates about an axial center, and a cleaning material that is spirally wound around the shaft material, is driven to be rotated by a rotating member to be cleaned, cleans the member to be cleaned, and has the number of windings which is equal to or greater than 1 and less than 2 in a cleaning area where the member to be cleaned is cleaned. | 11-19-2015 |
20160018752 | IMAGE FORMING APPARATUS AND IMAGE FORMING UNIT - Provided is an image forming apparatus including an image holder that is mounted at a predetermined mount position, a charging member that charges the image holder, a cleaning member that cleans the charging member, a holding member that holds the charging member and the cleaning member, includes a mount section on which the cleaning member is mounted, is urged toward the image holder side, and recedes when the image holder is mounted at the predetermined mount position, and a drop-out prevention section that is disposed at a position facing the mount section which is included in the holding member at a receding position and that prevents the cleaning member from dropping out from the mount section. | 01-21-2016 |
20160097986 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member, a charging member, a charging voltage source, an electrostatic image forming portion, a developing device, a developing voltage source, a transfer portion, a transfer voltage source, and a controller. During image formation, the toner remaining on the image bearing member after transfer is collected into the developing device while forming an image. In a cleaning operation performed during non-image formation, while rotating the image bearing member, the controller transfers the toner from the charging member onto the image bearing member, passes the toner through the developing portion in an urged state, reverses a charge polarity of the toner to a normal polarity at a charging portion, and then transfers the toner reversed in charge polarity from the image bearing member onto the developing member at the developing portion to collect the toner in the developing device. | 04-07-2016 |
20160147191 | ROTOR BEARING MEMBER, PHOTOCONDUCTOR UNIT INCLUDING THE SAME, AND IMAGE FORMING APPARATUS - A rotor bearing member is attached to a support body. The support body includes a guide section that supports a first member and a second member such that the first member and the second member are movable toward a rotor. The first member includes a rotary shaft and rotates about the rotary shaft thereof while being in contact with the rotor. The second member includes a rotary shaft extending along the rotary shaft of the first member and cleans a surface of the first member while rotating in contact with the first member. The rotor bearing member includes a first bearing member and a second bearing member that rotatably support the rotary shaft of the second member and the rotary shaft of the first member, respectively, while the first bearing member and the second bearing member abut each other. | 05-26-2016 |
20160187836 | CLEANING MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A cleaning member includes a core, and an elastic layer including a strip-shaped elastic member that is spirally wound around a region of an outer peripheral surface of the core ranging from one end to another end of the core, wherein a width W | 06-30-2016 |
20160378013 | CLEANING MEMBER, IMAGE HOLDER DEVICE, AND CHARGING DEVICE - Provided is a cleaning member including a helical convex section formed on an outer peripheral surface, wherein the cleaning member comes into complete contact with a target cleaning member in an axial direction of the target cleaning member, and rotates in contact with the target cleaning member rotating around an axis. | 12-29-2016 |
20160378058 | IMAGE FORMING APPARATUS - The present invention includes a compressor for generating compressed air for separating a sheet from a fixing portion. By using the compressed air generated by the compressor, an image forming portion, more specifically, for example, a charger, is cleaned. | 12-29-2016 |
20180024495 | IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, DEVELOPING CARTRIDGE, AND DRUM CARTRIDGE | 01-25-2018 |
20190146366 | IMAGE CARRYING MEMBER UNIT AND IMAGE FORMING APPARATUS THEREWITH | 05-16-2019 |