Entries |
Document | Title | Date |
20090097881 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR CONTAINING TRIAMINE COMPOUND AND IMAGE FORMING APPARATUS HAVING THE SAME, AS WELL AS TRIAMINE COMPOUND AND METHOD FOR PRODUCING THE SAME - To provide a novel triamine compound usable for providing an electrophotographic photoreceptor having excellent in effect of an ozone resistance, and causing no adverse effect in other characteristic aspects, and a method for producing the same, as well as an electrophotographic photoreceptor using the triamine compound, and an image forming apparatus having the same, there is provided the electrophotographic photoreceptor formed by laminating a monolayer type photosensitive layer containing a charge generating material and a charge transporting material, or a laminate type photosensitive layer having a charge generating layer containing the charge generating material and a charge transporting layer containing the charge transporting material laminated in this order, on a conductive supporting member made of a conductive material, the monolayer type photosensitive layer or the charge transporting layer of the laminate type photosensitive layer containing a specific triamine compound. | 04-16-2009 |
20090129817 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS - There provides an electrophotographic photoreceptor using a novel amine compound which has an excellent effect of ozone resistance and can be used for providing an electrophotographic photoreceptor having no adverse effect on other characteristics, and an image forming apparatus including the photoreceptor. The aim is attained by an electrophotographic photoreceptor formed by stacking a single layer type photosensitive layer containing a charge generating material and a charge transporting material, or a layered photosensitive layer, in which a charge generation layer containing a charge generating material and a charge transporting layer containing a charge transporting material are stacked in this order, on a conductive substrate made of a conductive material, wherein the single layer type photosensitive layer or the charge transporting layer of the layered photosensitive layer contains a specific amine compound. | 05-21-2009 |
20090324290 | Charging apparatus, print engine that incorporates the charging apparatus, and image forming apparatus that incorporates the print engine - A charging apparatus includes a charging member and at least one projection formed on the charging member. The charging member includes a surface that faces the surface of a photoconductive body. The at least one projection is formed on the first surface to extend in a direction parallel to the longitudinal direction of the photoconductive body. The projection is in contact with the surface of the photoconductive body. | 12-31-2009 |
20090324291 | CHARGING DEVICE, DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS - A charging device includes a charging member and a charging power source portion. The charging member, in a sheet shape, is secured by contacting a region of an electrostatic latent image to be formed on a rotatable image carrier. The charging power source portion applies charging voltage to the charging member. The charging member includes a plurality of holes. | 12-31-2009 |
20100074652 | CHARGE DEVICE, IMAGE FORMATION ASSEMBLY USING THE SAME, AND IMAGE FORMATION APPARATUS - A charge device includes a charging belt, an electrode member, a bias supplying unit and a discharge region forming member. The belt comes into contact with a charged body. The electrode member is in contact with a part of an inner peripheral surface of the charging belt. The electrode member faces the charged body across the charging belt between the electrode member and the charged body. A downstream-side portion of the charging belt is located downstream of a position where the charged body faces the electrode member, in a moving direction of the charged body. The discharge region forming member brings the downstream-side portion into contact with the electrode member to form a discharge region in which discharge occurs between the downstream-side portion and the charged body. | 03-25-2010 |
20100215403 | PROTECTIVE SHEET, IMAGE FORMING UNIT AND IMAGE FORMING APPARATUS - An aspect of the present invention is a protective sheet including: a protective portion that can be inserted between a charging member which is in contact with an outer peripheral surface of a latent image carrier and the latent image carrier, and that can cover an image forming area formed on the outer peripheral surface of the latent image carrier; and a high friction portion that is connected to an end portion of the protective portion, that can be inserted between a pressing portion for being pressed against a background area formed on the outer peripheral surface of the latent image carrier and the background area of the latent image carrier, and whose dynamic frictional force when pulled out from the latent image carrier is higher than that of the protective portion. | 08-26-2010 |
20110103837 | Mechanism for electrifying, method of electrifying, and conductive member - A mechanism for electrifying a rotator that is used in an image forming apparatus includes a cloth-like or sheet-like conductive member, wherein part of the conductive member comes into contact with an object to be electrified and the other part of the conductive member comes into surface contact with any one contact member of the rotator, a rotating shaft that rotates together with the rotator, and a shaft where the rotator is rotatably supported, so that the object to be electrified and the contact member are electrically connected to each other through the conductive member. | 05-05-2011 |
20110299890 | IMAGE FORMING APPARATUS - The present invention provides an image forming apparatus, including: an image carrier configured by a positively charged single-layer electrophotographic photosensitive body; a charging device which is based on a contact charging method for charging a circumferential surface of the image carrier while making contact with the circumferential surface of the image carrier; and a transfer unit which transfers a toner image on the circumferential surface of the image carrier to a transfer receiving body by gripping the transfer receiving body with the image carrier, wherein the transfer unit includes an application unit to which a transfer bias is applied, and a region having a volume resistivity of 10 | 12-08-2011 |
20120045251 | Charging apparatus using charging tube and image forming apparatus having the same - A charging apparatus including a charging tube which has an outer surface contacting a photoconductive medium and electrically charges a surface of the photoconductive medium, a shaft which is disposed in the charging tube and to which a charging voltage is applied, and a conductive member which is connected to the shaft and contacts an inner surface of the charging tube. A friction coefficient between the conductive member and the inner surface of the charging tube may be less than a friction coefficient between the photoconductive medium and the outer surface of the charging tube, so that a slip phenomenon of the charging tube is prevented. | 02-23-2012 |
20120070192 | ELECTROSTATIC CHARGING APPARATUS, IMAGE FORMING APPARATUS, ELECTROSTATIC CHARGING METHOD AND IMAGE FORMING METHOD - An electrostatic charging apparatus includes: an electrostatic charging member that has a discharge face causing discharge between the electrostatic charging member and a to-be-charged member having a charge retention part to hold a charge, and comes in contact with the to-be-charged member so as to charge upon the application of voltage; and an adjusting unit that adjusts an angle between the to-be-charged member and the discharge face. | 03-22-2012 |
20120076539 | CHARGING MEMBER - A charging member is provided which can not easily change in charging performance even because of its service over a long period of time. The charging member has a conductive support, an elastic layer and a surface layer. The elastic layer comprises spherical particles in such a way that the spherical particles are exposed at least in part to the surface of the elastic layer so as to make the surface of the elastic layer roughened; the spherical particles are at least one type selected from the group consisting of spherical silica particles, spherical alumina particles and spherical zirconia particles; the surface of the elastic layer is overlaid with the surface layer in such a way that the surface profile of the elastic layer is reflected on the surface profile of the charging member; and the surface layer comprises a high-molecular compound having a specific constituent unit. | 03-29-2012 |
20120082481 | CHARGING MEMBER AND PROCESS FOR ITS PRODUCTION - A charging member is provided which has a surface layer that can more surely keep bleeding from occurring. It is a charging member having a substrate, an elastic layer and a surface layer; the surface layer containing a high-molecular compound having a constituent unit represented by the following formula (1) and a constituent unit represented by the following formula (2), and having an Si—O—Zr linkage. | 04-05-2012 |
20120148307 | CHARGING MEMBER AND IMAGE FORMING APPARATUS - A blade-like charging member for charging a surface of an image bearing member by contacting thereto and by being supplied with a voltage. The charging member includes a charging portion for effecting electric discharge to the surface of the image bearing member, and a non-charging portion not effecting the electric discharge to the surface of the image bearing member. The non-charging portion is capable of contacting the image bearing member while maintaining an electrically dischargeable gap between the charging portion and the image bearing member. At least a part of the non-charging portion is made of a material having a higher resistance than that of the charging portion so as to prevent electric discharge between the non-charging portion and the surface of the image bearing member. | 06-14-2012 |
20120148308 | CHARGING MEMBER AND IMAGE FORMING APPARATUS - A blade-like charging member for charging a surface of an image bearing member by contacting thereto includes a charging portion for effecting electric discharge to the surface of the image bearing member. The non-charging portion is made of a material having a higher resistance than that of the charging portion so as to prevent electric discharge between the non-charging portion and the surface of the image bearing member. The non-charging portion is capable of sliding contact with the surface of the image bearing member over the entirety of an image forming region width of the surface of the image bearing member, the charge non-charging portions are bonded to each other by adhesive material at a connection interface. | 06-14-2012 |
20120148309 | CHARGING MEMBER AND IMAGE FORMING APPARATUS - A charging blade for charging a surface of an image bearing drum by contacting thereto includes a charging portion for effecting electric discharge to the surface of the drum; a non-charging portion not effecting the electric discharge to the surface of the drum, wherein the non-charging portion can contact the drum to provide a dischargeable gap between the charge portion and the drum, and at least a part the non-charging portion is made of a substance having a resistance higher than that of the charge portion to prevent no discharge occurs from the non-charging portion to the surface of the drum; and a support for the non-charging portion and the charge portion, wherein the non-charging portion and the charge portion are separation members and are not contacted to each other. | 06-14-2012 |
20120213552 | IMAGE-FORMING APPARATUS - An image-forming apparatus includes an image carrier that has an electrically chargeable film formed on a surface thereof and that carries an image and a charging section that charges a surface of the film on the image carrier. The charging section includes a first charging member that applies a direct-current voltage between the first charging member and the image carrier and a second charging member that applies a direct-current voltage between the second charging member and the image carrier to charge the film on the image carrier to a predetermined surface potential after the first charging member charges the film on the image carrier. The voltage applied by the first charging member is decreased such that the surface potential of the image carrier after the voltage is applied by the first charging member is decreased as the film on the image carrier becomes thinner. | 08-23-2012 |
20130039677 | CHARGING MEMBER, MANUFACTURING METHOD FOR CHARGING MEMBER, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is a charging member which hardly causes a cleaning failure in a photosensitive member while having such flexibility that a sufficient nip width can be formed with respect to a photosensitive member. The charging member comprises: an electro-conductive support; and an elastic layer as a surface layer, wherein: the elastic layer has a hardened region formed by irradiation with an electron beam; and the hardened region supports a composite particle in a state in which the composite particle is exposed on the surface of the elastic layer, thereby roughening the surface of the elastic layer, and wherein: said composite particle includes a silica-containing porous particle whose surface is coated with a carbon-containing film. | 02-14-2013 |
20130114978 | CHARGING MEMBER, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND ELECTROPHOTOGRAPHIC IMAGE FORMING PROCESS - To provide a charging member showing a high charge injection efficiency, the charging member has an electro-conductive substrate and electro-conductive fibers one ends of which stand bonded to the electro-conductive substrate, and the electro-conductive fibers each have a core portion composed of a thermoplastic resin and a sheath portion with which the core portion stands covered, where the sheath portion contains a thermoplastic resin and a plurality of carbon nanotubes standing entangled one another, and the carbon nanotubes stand exposed to the surface of the electro-conductive fibers each at their tip portions. | 05-09-2013 |
20130170859 | CHARGING MEMBER AND IMAGE FORMING APPARATUS - A blade-like charging member for charging a surface of an image bearing member by contacting thereto and by being supplied with a voltage, includes a charging portion for effecting electric discharge to the surface of the image bearing member; a non-charging portion not effecting the electric discharge to the surface of the image bearing member; non-charging portion capable of contacting the image bearing member with maintaining an electrically dischargeable gap between the charging portion and the image bearing member, wherein at least a part of the non-charging portion is made of a material having a higher resistance than that of the charging portion so as to prevent electric discharge between the non-charging portion and the surface of the image bearing member, and the non-charging portion is contacted to and slidable on the surface of the image bearing member over a range not less than a longitudinal dimension of the charge portion, and wherein when the surface of the image bearing member is charged, a closest distance between a discharging position of a surface of the charge portion and an electrode portion for applying a voltage to the charging member is longer in a longitudinal end portion of the charging member than in a longitudinally central portion. | 07-04-2013 |
20130243485 | CHARGING DEVICE AND IMAGE FORMING APPARATUS - A charging device includes a charging member including an endless cylindrical flexible base member and conductive contactors provided along an outer peripheral surface of the base member, the charging member being attracted to a charged member in a pressure applied state by electrostatic attraction force responsive to a charging voltage applied to the charging member or by the electrostatic attraction force and self-weight of the charging member, the charging member charging the charged member; and a voltage applying member that applies the charging voltage to the charging member. | 09-19-2013 |
20130243486 | DISCHARGE WIRE ANCHORING MECHANISM, CHARGER USING SAME, AND IMAGE FORMING APPARATUS USING SAME - A discharge wire anchoring mechanism that is includable in an image forming apparatus together with an image carrier and a charger including at least one replaceable discharge wire to uniformly charge a surface of the image carrier. The discharge wire anchoring mechanism includes a wire holder to retain the at least one discharge wire with tension in preparation of anchoring the at least one discharge wire and separating from the at least one discharge wire after the at least one discharge wire is anchored to the charger. | 09-19-2013 |
20130287443 | PRINTER CHARGING BLADES AND PRINTERS - Printer charging blades and printers are disclosed. An example charging blade for a printer includes an insulating layer to contact a photo imaging surface at an angle to apply pressure to the photo imaging surface, the pressure to control an amount of material present on the photo imaging surface, and a conductive layer attached to a side of the insulating layer, the conductive layer to be charged and to apply a first charge to the photo imaging surface. | 10-31-2013 |
20140056619 | CHARGING MEMBER, CHARGING DEVICE, DETACHABLE BODY, AND IMAGE FORMING APPARATUS - A charging member includes a contact section and a supported section. The contact section is in contact with a charged body. The supported section is integrated with the contact section and is supported by a support member. The supported section has a lower hardness than the contact section. | 02-27-2014 |
20140105646 | ELECTROPHOTOGRAPHIC MEMBER AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is an electrophotographic member, which hardly changes in performance even when being left to stand for a long time period. The electrophotographic member comprises a support, an elastic layer formed on the support, and a surface layer covering a surface of the elastic layer and containing a urethane resin, and in which the urethane resin comprises a reaction product of: a hydroxyl group-terminated prepolymer obtained by reacting a polyester polyol with a polyisocyanate; and an isocyanate-terminated prepolymer obtained by reacting a polyester polyol with a polyisocyanate. | 04-17-2014 |
20150016843 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge detachably mountable to an image forming apparatus includes: an image bearing member for forming a latent image; a charging member, press-contacted to the image bearing member at a predetermined urging force, for electrically charging the image bearing member by being supplied with a charging bias; a developing device for developing the latent image by supplying a polymerized toner to the image bearing member; and a cleaning blade for removing the polymerized toner deposited on the image bearing member in contact with the image bearing member. The charging member includes: an electroconductive support; one or more elastic layer formed around the electroconductive support; and projected portions and recessed portions provided on a surface of the charging member. The projected portions are elastically deformable in contact with the image bearing member, leaving electrically dischargeable gaps between the recessed portions of the charging member and the image bearing member. | 01-15-2015 |
20150023697 | IMAGE FORMING APPARATUS - An image forming apparatus including: a contact charging unit that is in contact with a photoreceptor and electrically charges the photoreceptor by causing electric discharge; a bias applying unit that applies an AC bias to the contact charging unit; and a superposing unit that superposes a DC bias onto the AC bias, the DC bias having a same polarity as a charge polarity of the photoreceptor. The AC bias has a same waveform as a rectangular wave bias during a period in which an absolute value of the AC bias is smaller than an absolute value of a predetermined boundary voltage, and the absolute value of the AC bias increases at a slower rate than an absolute value of the rectangular wave bias during a period in which the absolute value of the AC bias is equal to or greater than an absolute value of a discharge start voltage. | 01-22-2015 |