Entries |
Document | Title | Date |
20080219713 | Developer Rolls Having A Tuned Resistivity And Methods For Making The Same - Developer roll having a conductive or semi-conductive soft rubber core and a coating deposited in the soft rubber core wherein the coating has a conductive agent. The outer surface of the soft rubber core is modified before the coating is deposited onto the outer surface of the soft rubber core. Methods for making the same. | 09-11-2008 |
20080226357 | Developing roller having specific surface layer, developing device provided with the developing roller and image-forming apparatus provided with developing device equipped with the developing roller - A developing roller, having a surface layer composed of;
| 09-18-2008 |
20080232864 | DEVELOPER SUPPLY ROLLER AND IMAGE FORMING APPARATUS - To provide a developer supply roller including:a shaft core; and an elastic layer over the shaft core, wherein the elastic layer is composed of at least a first elastic layer and a second elastic layer, the first elastic layer and second elastic layer made of elastic bodies with different moduli of elasticity, the first layer being an outermost layer of the supply roller, and wherein the relationships 0%≦k1≦20% and 20%≦k2≦70% are satisfied, where k1 is the modulus of repulsion elasticity of the first elastic layer and k2 is the modulus of repulsion elasticity (%) of the second elastic layer. | 09-25-2008 |
20080232865 | MAGNET ROLLER, DEVELOPING AGENT CARRIER, DEVELOPING UNIT, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS USING SAME - A magnet roller for use with a hollow cylindrical structure made of a non-magnetic material includes a roller body and a reinforcing member. The roller body, encased in the hollow cylindrical structure, has at least one magnetic pole to form an agent releasing area on a skin of the cylindrical structure. The roller body is integrated with a shaft on each end portion of the roller body as one solid body. The reinforcing member is embedded in a portion of the roller body corresponding to the agent releasing area. The reinforcing member is made of a material different from a material used for the roller body and extends in an axial direction of the roller body. | 09-25-2008 |
20080247787 | Positive Charge Control Resin for Electrophotographic Functional Component Parts, Developing Roller, and Electrophotographic Apparatus - To provide a positive charge control resin with which an electrophotographic functional component part coming into contact with a toner can be made chargeable in a polarity reverse to the polarity of the toner, and which has superior dispersibility in, and compatibility with, a main binder. The present invention is a positive charge control resin having a copolymer obtained by polymerizing specific acrylate or methacrylate monomer, amino-group-containing monomer(s) and carboxyl-group-containing monomer(s) as copolymerization components. | 10-09-2008 |
20080273901 | Developing Device and Image Forming Apparatus Using the Same - To provide a developing device capable of preventing excess charge of the toner particles so as to prevent occurrence of failure caused by an decrease in toner flying property between the developing roller and photoconductor or a change in development characteristics, a developing device according to the present invention develops non-magnetic mono component toner using a developing roller having on its surface a plurality of groove portions each of which includes: a leading end side cut portion formed on the leading end side of the developing roller in the rotational direction thereof and having a leading end side cut angle θ | 11-06-2008 |
20080279598 | Developing roller - A developing roller for providing a magnetic brush for a printer or copier according to embodiments of the present invention has a substantially cylindrical outer surface. The outer surface comprises a regular or irregular array of a number of isolated areas, each isolated area being provided by a recess in the outer surface. Each recess is completely surrounded on all sides and isolated from any neighbouring isolated area by separation zones being part of the substantially cylindrical outer surface. | 11-13-2008 |
20080286016 | REGENERATED ELASTIC ROLLER MANUFACTURING PROCESS, REGENERATED ELASTIC ROLLER, ELECTROPOHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPOHOTOGRAPHIC IMAGE FORMING APPARATUS - A regenerated elastic rollers manufacturing process is provided. The process includes the step of removing an agglutinated stain of toner adhered to the surface of an elastic roller including a mandrel and an elastic layer. The step further includes the steps of: (1) pressing a pressing roller against the surface of the elastic roller so as to crack the agglutinated stain on the surface of the elastic roller; and (2) removing the agglutinated stain cracked in the step (1) from the surface of the elastic roller by means of an adhesive roller. | 11-20-2008 |
20080292366 | Developing Roller, Charging Roller, Conductive Roller and Method for Producing the Same - This invention relates to a conductive roller such as a developing roller, a charging roller or the like provided with a resin coating calyer on a surface of an elastic layer, and more particularly to a conductive roller having the resin coating layer using an ultraviolet-curing type resin or an electron beam curing type resin and being obtained by contriving a structure of the resin coating layer, rendering the resin coating layer to contain microparticles, controlling the particle size of the microparticles, or forming the resin coating layer after the outer peripheral surface of the elastic layer is subjected to surface treatment. | 11-27-2008 |
20080292367 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device and an image forming apparatus which can form a printing image having high resolution and a high quality level, while resolving various problems resulted from the use of small particle size toner particles are provided. The developing device includes a toner constituted of resin base particles containing a coloring agent and a binder resin, and silicone oil and/or fluoro oil added to the resin base particles, a toner receiving portion for receiving the toner, and a developing roller having an outer peripheral surface and an irregularity section for carrying the toner, the irregularity section formed on the outer peripheral surface and including a plurality of depression portions and/or protrusion portions provided regularly and uniformly, wherein an average particle size of the resin base particles in volume basis is in the range of 2 to 4 μm, and an added amount of the silicone oil and/or fluoro oil to the resin base particles is in the range of 0.05 to 2 mass %. | 11-27-2008 |
20080304874 | Developing Roller and Imaging Apparatus Using the Same - There are provided a developing roller capable of making useless a drying line in the formation of a resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer as well as an imaging apparatus using the same. The developing roller | 12-11-2008 |
20080304875 | DEVELOPING DEVICE, DEVELOPER THEREFOR, AND IMAGE FORMING METHOD AND APPARATUS, AND PROCESS CARTRIDGE USING THE DEVELOPING DEVICE - A developing device including a developer bearing member configured to feed a developer to an image bearing member; a developer supplying member, which is contacted with the developer bearing member at a first nip while opposed thereto and which is configured to supply the developer to the developer bearing member; and a developer layer forming member, which is contacted with the developer bearing member at a second nip located on the downstream side from the first nip relative to the rotation direction of the developer bearing member to form the layer of the developer on the developer bearing member, wherein the developer is a nonmagnetic one component developer, and the distance between the front edge of the second nip and the rear edge of the first nip relative to the rotation direction of the image bearing member is greater than 0.8 mm and less than 2.0 mm. | 12-11-2008 |
20080310889 | DEVELOPING ROLLER SPECIFIC FOR MONO-COMPONENT DEVELOPING APPARATUS - To provide a developing roller which makes it possible to sufficiently prevent toner leakage, with the driving torque of the developing roller being scarcely increased, and a mono-component developing apparatus having such a developing roller. | 12-18-2008 |
20080317514 | Image forming apparatus - The present invention provides an image-forming apparatus comprising a magnetic roll for magnetically holding a two-component developer in which toner and a magnetic carrier are electrostatically bonded, a developing roll in which a thin layer of the toner transferred from the two-component developer on the magnetic roll is formed on the surface, and a latent image support in which a latent image is developed with using the toner on the developing roll by a developing bias applied in relation to the developing roll, wherein the developing roll has a coating layer composed of silicone-modified polyurethane on a surface. | 12-25-2008 |
20080317515 | DEVELOPING ROLLER, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A developing roller is provided having a surface that has excellent effect of suppressing exudation of low molecular weight substances from an elastic body, excellent toner release properties, and sufficient flexibility in which cracks do not easily occur even by repeated image formation. The developing roller carries and conveys toner to develop electrostatic latent images on a photosensitive drum with the toner and includes in this order a mandrel, an elastic layer, and a surface layer. The surface layer includes a silicon oxide film containing carbon atoms chemically bonded to silicon atoms. The silicon oxide film has an abundance ratio of oxygen atoms forming chemical bonds with silicon atoms to silicon atoms (O/Si) of 0.65 or more and 1.95 or less, and an abundance ratio of carbon atoms forming chemical bonds with silicon atoms to silicon atoms (C/Si) of 0.05 or more and 1.65 or less. | 12-25-2008 |
20090010684 | DEVELOPING ROLLER, DEVELOPING ASSEMBLY, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A developing roller is provided which is soft enough to enable toners to be kept from deteriorating with time and cannot easily cause permanent set. The developing roller includes a mandrel, an elastic-material layer and a cover layer as a surface layer which covers the elastic-material layer. Asker-C hardness at the surface of the cover layer is from 40° to 85°. The cover layer has a thickness of from 15 nm to 5,000 nm. Martens hardness H | 01-08-2009 |
20090016782 | Developing device and image forming apparatus - A developing device is disposed facing an image bearing body that bears a latent image. The developing device includes a developer bearing body that bears a developer for developing the latent image. The developer includes mother particles and external additives. A liberation amount T (weight parts) of the external additives liberated from the mother particles with respect to 100 weight parts of the mother particles, a surface roughness Rz (m) of the developer bearing body, and a circumferential speed Vd (mm/s) of the developer bearing body satisfy the following relationships: | 01-15-2009 |
20090035027 | DEVELOPING ROLLER - The objective of the present invention is to provide a developing roller that can form a toner image with high quality. | 02-05-2009 |
20090035028 | Developer Unit, Process Device and Image Forming Apparatus - A developer unit according to one aspect of the invention includes: a developer accommodation member configured to accommodate a developer, the developer having charging polarity to a first polarity; a developing roller arranged at the developer accommodation member, the developing roller being configured to carry the developer; a supply roller arranged at the developer accommodation member, the supply roller being configured to supply the developer to the developing roller; and a charging member brought into sliding contact with the supply roller. The charging member at a portion brought into sliding contact with the supply roller is formed of a material which is positioned on a side of the first polarity on a triboelectric series relative to the supply roller. | 02-05-2009 |
20090060596 | ROTATION MEMBER UNIT AND IMAGE FORMING APPARATUS - A rotation member unit detachable from a casing includes a rotation member for rotating when driven, and plural drive introduction members arranged at both ends of the rotation member in a rotation axial direction of the rotation member, respectively. The drive introduction member engages with a drive transmission member rotated by a motor. | 03-05-2009 |
20090060597 | COPOLYMER, RESIN FOR ELECTROPHOTOGRAPHIC FUNCTIONAL COMPONENT PARTS, DEVELOPING ROLLER, AND ELECTROPHOTOGRAPHIC APPARATUS - A copolymer obtained by copolymerizing at least one monomer selected from specific acrylate or methacrylate monomers, at least one monomer selected from specific amino group-containing monomers and at least one monomer selected from specific polar group-containing monomers. A resin for electrophotographic functional component parts, which contains this copolymer, a developing roller in which a cover layer serving as a surface layer contains the copolymer as a positive charge control resin, and an electrophotographic apparatus that includes the developing roller. | 03-05-2009 |
20090067891 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - The present invention provides an electrophotographic photoconductor including, an uppermost crosslinked surface layer including a cured product of a crosslinked surface layer composition containing a tri- or more functional radical-polymerizable monomer having no charge transportable structure, organosilica sol, an isocyanate group-containing radical-polymerizable monomer, and a curable charge transport material. | 03-12-2009 |
20090080946 | TONER CONVEYING MECHANISM, CLEANING DEVICE AND IMAGE FORMING APPARATUS - A cleaning device comprises a toner conveying mechanism, wherein the toner conveying mechanism includes a conveying member that rotates to convey toner; and an elastic member that is furnished for contacting with circumference of the conveying member, wherein the elastic member contacts to circumference of the rotating conveying member with slide. | 03-26-2009 |
20090123195 | DEVELOPING ROLLER, DEVELOPING APPARATUS USING THE SAME, AND IMAGE FORMING APPARATUS - A developing roller having an elastic layer on the outer periphery of a mandrel and having a surface layer containing a resin and resin particles on its outer periphery, wherein the surface layer has a convex portion attributable to the resin particles, and has a surface of roughness in which a distortion degree Rsk of a roughness curve is 0.15 or more and 0.70 or less, wherein the resin particles have a peak P1 at a particle diameter dl in a volume particle size distribution, and wherein “a”, “b”, “c”, d1, d2 and d3 satisfy a specific relationship, where, “a” denotes a volume fraction of the resin particle having the particle diameter dl in the volume particle size distribution, and “b” and “c” denote volume fractions at particle diameters d2 and d3 respectively in the volume particle size distribution. | 05-14-2009 |
20090136268 | Roller device for a toner cartridge - A roller device for a toner cartridge includes a spindle and a roller body. The roller body has a foam layer disposed around the spindle, and an outer tube disposed around the foam layer. Both of the outer tube and the foam layer are made of a thermoplastic material. The roller body has a bulk resistance ranging from 10 | 05-28-2009 |
20090162109 | CONDUCTIVE RUBBER ROLLER AND TRANSFER ROLLER - A conductive rubber roller and transfer roller whose resistance value is easily controlled and which lowers contamination of a charged member and has excellent electric variability and compressive permanent set is provided at low cost. There is provided a conductive rubber roller for use in an electrophotographic process, wherein a rubber component of the conductive rubber roller has at least acrylonitrile butadiene rubber whose acrylonitrile content is 15% by mass to 25% by mass (both inclusive) and weight average molecular weight (Mw) is 500,000 to 1,000,000 (both inclusive), and epichlorohydrin type rubber whose ethylene oxide content is not less than 70% by mole to less than 90% by mole; and the acrylonitrile butadiene rubber is contained in an amount of 5 parts by mass to 80 parts by mass (both inclusive) in 100 parts by mass of the rubber component. | 06-25-2009 |
20090180818 | DEVELOPING UNIT AND IMAGE FORMING DEVICE - A developing unit includes a developing roller which rotates about a rotational axis to supply toner to a photoreceptor, the developing roller including: a cylindrical core portion which includes an electric conductor; a first resistive layer which covers a cylindrical surface of the core portion; a second resistive layer which covers the first resistive layer, and has electric-resistivity lower than that of the first resistive layer; and a current leakage control member which prevents leakage of electric current from the core portion toward the second resistive layer through an end of the developing roller along a direction of the rotational axis. | 07-16-2009 |
20090185837 | Developing device and image forming apparatus - A developing device includes a developer supporting member having an elastic layer and a surface layer, and a supply member for supplying developer to the developer supporting member. The surface layer is formed of a mixture containing at least an acrylic resin and a polyether type urethane resin. The developer supporting member and the supply member are configured so that the following equations are satisfied: | 07-23-2009 |
20090185838 | Method of Manufacturing Toner Carrier Roller, Developer Apparatus, and Image Forming Apparatus - A method of manufacturing a toner carrier roller that is shaped like a cylinder on an outer circumferential surface of which concave and convex sections for carrying toner are provided, includes: preparing a roller base member which is shaped like a cylinder; forming helix-like first grooves on the outer circumferential surface of the roller base member; and forming helix-like second grooves, which cross the first grooves, on the outer circumferential surface of the roller base member, wherein a pitch ratio of the first grooves and the second grooves is a non-integer ratio. | 07-23-2009 |
20090208255 | Development Roller, Development Device, and Image Forming Apparatus - A development roller includes a base unit having a base recess and a base projection formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. | 08-20-2009 |
20090208256 | Development Roller, Development Device, and Image Forming Apparatus - A development roller includes a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit by pressing a regular pattern in pressure machining, and a surface layer formed on the circumference surface of the base unit and having a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. A thickness of the surface layer is larger than a maximum height of a base swollen portion close to the side edge of the base projection from a regular surface of the base projection. | 08-20-2009 |
20090214272 | Developing device and image forming apparatus - A developing device includes a developer supporting member for supporting developer and a developer charging member disposed to face the developer supporting member for charging and supplying the developer to the developer supporting member. The developer supporting member has a surface having a calculated average surface roughness Ra between 0.1 μm and 0.6 μm and a surface free energy SFE between 15 mN/m and 26 mN/m. Further, the developer charging member has an Asker F hardness Haf between 24° and 56°. | 08-27-2009 |
20090226221 | Developer carrier, developing device, image forming apparatus, process cartridge, and image forming method - A developer carrier which holds a developer on a surface and is rotatable includes: a plurality of grooves which is formed on the surface, wherein each of the grooves is wavy-lined, an inclination direction of the grooves to an axis of the developer carrier is cyclically changed in an opposite direction, and the grooves are respectively arranged at intervals. | 09-10-2009 |
20090232564 | METHOD OF PRODUCING OA APPARATUS ROLLER AND OA APPARATUS ROLLER - The invention offers a method of producing an OA apparatus roller that can increase the thermal conductivity of the surface layer composed of a fluororesin layer by decreasing its thickness, that has an excellent parting ability, that can prevent the rubber layer from deteriorating, and that is free from foreign matters adhering onto the inner surface of a hollow cylindrical mold even when the hollow cylindrical mold is used. The invention also offers an OA apparatus roller produced by the foregoing method. The method of producing an OA apparatus roller is provided with a step of forming an elastic layer and a surface layer in this order on a core metal. In this method, the surface layer is formed by using a fluororesin dispersion and the fluororesin dispersion contains a surfactant, a film-thickening agent, and a viscosity-increasing agent with a total content of 1.0 to 5.0 wt %. | 09-17-2009 |
20090245891 | ROLLING APPARATUS, DEVELOPMENT ROLLER AND METHOD FOR MANUFACTURING THE SAME, DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS - An apparatus includes: a rolling die having protruding threads and a feeding unit moving the workpiece by L | 10-01-2009 |
20090245892 | DEVELOPING ROLLER - In the present invention, provided can be a developing roller through which neither fog nor contamination inside the apparatus is generated, and no insufficient image density is produced, even though printing a large number of paper sheets (5000 paper sheets, for example). Also disclosed is a developing roller possessing a conductive shaft and a coating layer provided on an outer circumference of the conductive shaft, wherein the coating layer possesses a resin and a surface roughness particle, and the coating layer surface has a surface roughness Ra of 0.5-2.5 μm and a Young's modulus Y of 1-200 MPa. | 10-01-2009 |
20090257789 | DEVELOPING ROLLER, DEVELOPING APPARATUS COMPRISING THE DEVELOPING ROLLER, AND METHOD FOR PROVIDING THE DEVELOPING ROLLER - Developing roller comprising a conductive mandrel with at least an elastic conductive base layer and a charge providing layer. The base layer is located closer to the mandrel than the charge providing layer. The base layer is roughened before the charge providing layer is applied to the base layer. | 10-15-2009 |
20090257790 | CONDUCTIVE COATING, METHOD FOR PREPARING A COATING, ROLLER, AND METHOD FOR MANUFACTURING A ROLLER AND USING A COATING - A conductive coating is described, suitable for coating a developer, charge or transfer roller in a developing apparatus to give a charge providing layer. The coating comprises a conductive polymer in a matrix. A roller is also described, suitable for a developing apparatus comprising, from the centre to the periphery, a conductive mandrel, a conductive elastic base layer and a charge providing layer. | 10-15-2009 |
20090311012 | DEVELOPING DEVICE AND IMAGE-FORMING APPARATUS - This invention relates to a developing device | 12-17-2009 |
20100046989 | DEVELOPING ROLLER, AND ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS COMPRISING THE DEVELOPING ROLLER - A developing roller has a surface layer which can effectively inhibit the bleeding of a low-molecular-weight component from an elastic layer, and can efficiently impart a high electric charge to a negatively chargeable toner, and is excellent in toner-releasing properties. The developing roller has a mandrel, at least one layer of an elastic layer provided on the mandrel and a surface layer provided on the elastic layer, carries and conveys a toner, and develops an electrostatic latent image on an opposing photosensitive member with the toner. The surface layer comprises a silicon compound film containing Si, N, C and H having specific total amounts of the existing elements Si, N, C and H, and specific ratios N/Si, C/Si, and H/Si. | 02-25-2010 |
20100054821 | ROLLER, DEVELOPING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME, AND METHOD OF MANUFACTURING ROLLER - A roller for use in a developing unit of an image forming apparatus may include a non-conductive shaft member and a non-conductive member to surround at least a part of an outer periphery of the shaft member. The shaft member may include a cylindrical rolling part and a pair of support parts formed to project from both ends of the rolling part in a lengthwise direction. The rolling part of the shaft member may be arranged opposite a charge roller in a developing unit and may rotate in contact with the charge roller to absorb and remove foreign substances adhered to a surface of the charge roller. | 03-04-2010 |
20100054822 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device for an image forming apparatus of a non-magnetic one-component type. The developing device has a developing roller having a body and a shaft. Bearings for supporting the shaft have a groove made in a contact surface that is in contact with the shaft, and grease is pooled in the groove. The contact surface of the shaft has a surface roughness from 0.2 to 0.5, and the grease has consistency from 265 to 385 ( 1/10 mm·20° C.). | 03-04-2010 |
20100054823 | DEVELOPING DEVICE, DEVELOPING CARTRIDGE, ROTATIONAL FORCE TRANSMITTING PART AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A developing device is usable with an electrophotographic image forming apparatus including a shaft and a rotary unit mounting the device. When mounted, the device is movable perpendicular to a shaft axial direction in response to movement of the rotary unit and the shaft is not movable in that direction. The device includes a developing roller that contacts and separates from a drum in response to movement of the rotary unit, and a coupler transmitting a rotating force to the roller. The coupler includes a portion engaging the shaft to receive a rotating force and a portion transmitting the received rotating force to the roller. The coupler takes a first position for transmitting the rotational force to the roller, a position before the coupler engages the shaft and is inclined away from the first position, and a position for the disengagement of the coupler and the shaft. | 03-04-2010 |
20100054824 | DEVELOPING ROLLER AND METHOD OF PRODUCING THE ROLLER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE-FORMING APPARATUS - The present invention intends to provide a method of producing a developing roller capable of providing high-quality electrophotographic images under a variety of environments. The method of producing a developing roller according to the present invention is a method of producing a developing roller having a mandrel, a resin layer on the outer periphery of the mandrel, and a surface layer on the outer periphery of the resin layer, the method including the step of curing a mixture containing a carbon black, a specific diol, and a specific isocyanate compound to form the surface layer. | 03-04-2010 |
20100098464 | TONER CARRYING ROLLER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A toner carrying roller in which a plurality of concave parts are arranged on a surface of a roller base member having a cylindrical shape, includes: an abrasion protection layer formed on the surface of the roller base member; and a charging layer formed on a surface of the abrasion protection layer, the abrasion protection layer being formed in the plurality of concave parts, and mainly made of one of NiP and NiBW. | 04-22-2010 |
20100143007 | IMAGE FORMING APPARATUS INCLUDING DEVELOPER CONTACT MEDIA HAVING NANO-SCALE ROUGHNESS - Provided is an image forming apparatus which includes a developer to develop an image and a developer contact medium of which a surface contacts the developer, wherein asperities with a density of about 4×10 | 06-10-2010 |
20100143008 | CONDUCTIVE ROLLER - The present invention provides a conductive roller having a toner transport part composed of a vulcanized rubber composition at least on an outermost layer thereof. The vulcanized rubber composition contains a rubber component (A), highly conductive carbon black (B) having a particle diameter not less than 18 nm and less than 80 nm, an inorganic filler (C) consisting of not less than one kind of a metal oxide selected from among a group of titanium oxide, alumina, and silica. A total of a content of the highly conductive carbon black (B) and a content of the inorganic filler (C) for 100 parts by mass of the rubber component (A) is not less than 10 parts by mass nor more than 60 parts by mass. | 06-10-2010 |
20100150618 | DEVELOPING ROLLER, DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND DEVELOPING ROLLER MANUFACTURING METHOD - A developing roller having a first inclined groove and a second inclined groove, which are continuous in a helical shape inclined with respect to an axial direction and a circumferential direction and which intersect with each other, formed in the surface thereof, wherein the first inclined groove and the second inclined groove have different groove depths. | 06-17-2010 |
20100172675 | CONDUCTIVE ROLLER - The present invention provides a conductive roller whose outermost layer is made of a vulcanized rubber composition. The vulcanized rubber composition contains epichlorohydrin rubber and chloroprene rubber as a rubber component thereof and 0.2 to 5 parts by mass of each of a thiourea-based vulcanizing agent and a vulcanization retarder consisting of N-(cyclohexylthio)phthalimide for 100 parts by mass of the rubber component. | 07-08-2010 |
20100189473 | DEVELOPMENT ROLLER - A developing roller which shows an excellent environmental performance and is free from occurrence of toner filming and toner leakage is provided. The developing roller | 07-29-2010 |
20100215411 | TONER ROLLER - In a toner roller that is suitable to take up a layer with toner particles on its outer surface. The toner roller has a roller-shaped inner body, and wherein a dielectric layer is arranged at an outer surface of the inner body. A high-resistance cover layer is located on said dielectric layer. | 08-26-2010 |
20100329748 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS USING THE DEVELOPING DEVICE - The developing device includes a developer charging member configured to charge a toner serving as a one developer; and a developer bearing member configured to bear and feed the charged toner while forming an electric field so that the toner hops. The developer bearing member includes an insulating substrate; plural electrodes arranged on the insulating substrate in a developer feeding direction to form the electric field; and an outermost layer covering the plural electrodes. The toner has a softening point of from 115 to 130° C. | 12-30-2010 |
20110013948 | CORE MATERIAL OF CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER AND METHOD FOR MANUFACTURING THE CORE MATERIAL, CARRIER AND METHOD FOR MANUFACTURING THE CARRIER, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE CARRIER - Objects of the present invention are to provide a carrier core material for an electrophotographic developer having a true spherical shape and excellent strength, and a controllable true density and/or apparent density, and a method for manufacturing the carrier core material, a carrier and a method for manufacturing the carrier, and an electrophotographic developer using the carrier. In order to achieve the objects, there are employed a carrier core material for an electrophotographic developer, containing 3 to 100% by number of hollow particles having an iron content of 36 to 78% by weight, and a carrier for an electrophotographic developer, obtained by coating a resin on a surface of the carrier core material, and methods for manufacturing these, and an electrophotographic developer using the carrier. | 01-20-2011 |
20110110690 | DEVELOPING ROLLER FOR ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, AND MANUFACTURING METHOD OF THE SAME - The disclosure provides a developing roller for an electrophotographic image forming apparatus, and a method of manufacturing the same. The developing roller includes a shaft member and a resilient member provided on the shaft member. The resilient member includes a conductive resilient layer in contact with the shaft member and a conductive resin layer defining the outer surface of the resilient member. The conductive resin layer includes a resin and a surface-treated metal oxide. The developing roller is capable of an increased amount of toner charging while stably maintaining optical density. | 05-12-2011 |
20110129262 | Development device, image forming apparatus, and method for manufacturing development device - A development device develops a latent image on an image carrier with developer. The development device includes a first rotatable development roller, a developer regulator, and a second rotatable development roller. The first rotatable development roller to bear the developer is provided facing the image carrier includes an axial rotary shaft and multiple grooves formed in a surface of the first development roller. The developer regulator is provided at a position facing the first development roller and restricts the amount of developer borne on the first development roller. The second rotatable development roller to bear the developer is provided facing the image carrier and not facing the developer regulator, and the second development roller having a convex and concave irregular surface. | 06-02-2011 |
20110135346 | DEVELOPER BEARING MEMBER, DEVELOPING APPARATUS, AND IMAGE FORMING APPARATUS - A developer bearing member includes a base body, a surface layer, and a plurality of concave portions provided on the surface layer, wherein a resistance value of the surface layer is 10 | 06-09-2011 |
20110188900 | URETHANE FOAM AND TONER-CONVEYING ROLLER USING THE SAME - Provided are urethane foam: which heightens toner charge amount (Q/M); by which toner is sufficiently absorbed in the surface layer of a toner-conveying roller to give a sufficient toner conveying ability; and by which a good image can be obtained with a low cost, and a toner-conveying roller using the same. | 08-04-2011 |
20110206421 | TONER CONVEYING ROLLER, MOLD USED FOR MANUFACTURING ROLLER AND METHOD FOR MANUFACTURING ROLLER - An object of the present invention is to provide a toner-conveying roller that has high toner-conveying property and in which a roller-shape thereof is less likely to be transferred to the image, a mold capable of manufacturing said roller, and a method of manufacturing said mold. The toner-conveying roller according to the present invention has a shaft body and a urethane foam layer formed around the shaft body, and recesses and protrusions are irregularly formed on a circumference surface of the urethane foam layer. The mold for manufacturing the roller according to the present invention has recesses and protrusions irregularly formed on the inner surface of a mold for manufacturing the roller. The method of manufacturing a mold used for manufacturing a roller according to the present invention includes: a powder sintering step of applying particles on an inner surface of a mold member, and forming recesses and protrusions on the inner surface of the mold member by heating the mold member having the particles on the inner surface thereof to sinter the particles; or, a fluorine coating step of applying particles on an inner surface of a mold member, and forming recesses and protrusions on the inner surface of the mold member by coating the inner surface having the particles applied thereon with fluorine resin. | 08-25-2011 |
20110229217 | TONER CARRIER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - An image forming apparatus includes a developing device. The developing device includes a toner carrier (developing roller). The developing roller includes a base member, electrode bars, a pair of electrodes, and a protection layer. The base member includes a conductive core and an insulating layer formed on the outer surface of the core. The electrode bars and the pair of electrodes are made of a conductive metal, and are provided on the outer surface of the insulating layer. The electrode bars and the pair of electrodes are formed in a way that an unnecessary portion of a metal film is irradiated with a laser beam and thus is removed. The electrodes are each formed helically on the outer surface of the base member | 09-22-2011 |
20110229218 | DEVELOPER CARRYING MEMBER AND DEVELOPING ASSEMBLY - A developer carrying member and a developing assembly are provided which can stably provide the toner with triboelectric charges, may less cause any problems such as image density decrease, density non-uniformity and spots around images even during running on a large number of sheets, and can enjoy a stable and good developing performance. The developer carrying member has a substrate and a resin layer, and the resin layer containing a thermosetting resin, an acrylic resin having specific units and electroconductive particles. | 09-22-2011 |
20110268479 | DEVELOPING UNIT AND IMAGE FORMING DEVICE - A developing unit includes a developing roller which rotates about a rotational axis to supply toner to a photoreceptor, and a magnetic roller which forms a magnetic brush with a two-component developing agent having carrier and the toner and thereby forms a toner layer on the developing roller, the developing roller including: a cylindrical core portion which includes an electric conductor; a first resistive layer which covers a cylindrical surface of the core portion; a second resistive layer which covers the first resistive layer, and has electric-resistivity lower than that of the first resistive layer; and a current leakage control member which prevents leakage of electric current from the core portion toward the second resistive layer through an end of the developing roller along a direction of the rotational axis. | 11-03-2011 |
20120014723 | SEMICONDUCTIVE ROLLER, TONER TRANSPORT ROLLER AND ELECTROPHOTOGRAPHIC APPARATUS - The semiconductive roller according to the present invention includes a roller body having an outer peripheral surface made of a crosslinked substance of a semiconductive rubber composition and exhibiting Shore A hardness of not more than 60, the semiconductive rubber composition contains a base polymer made of a mixture of (1) mixed rubber N of liquid nitrile rubber and solid nitrile rubber, (2) chloroprene rubber C, and (3) epichlorohydrin rubber E in a mass ratio (C+E)/N of 10/90 to 80/20, the ratios of the chloroprene rubber and the epichlorohydrin rubber in the total quantity of the base polymer are not less than 5 mass % and not less than 5 mass % respectively, and roller resistance at an applied voltage of 5 V is not less than 10 | 01-19-2012 |
20120195649 | REGENERATED ELASTIC ROLLER MANUFACTURING PROCESS, REGENERATED ELASTIC ROLLER, ELECTROPOHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPOHOTOGRAPHIC IMAGE FORMING APPARATUS - A regenerated elastic rollers manufacturing process is provided. The process includes the step of removing an agglutinated stain of toner adhered to the surface of an elastic roller including a mandrel and an elastic layer. The step further includes the steps of: (1) pressing a pressing roller against the surface of the elastic roller so as to crack the agglutinated stain on the surface of the elastic roller; and (2) removing the agglutinated stain cracked in the step (1) from the surface of the elastic roller by means of an adhesive roller. | 08-02-2012 |
20120201577 | DEVELOPING APPARATUS - A developing apparatus includes a developer carrying member; and a magnetic member provided inside the carrying member and having magnetic poles arranged circumferentially, wherein on a center axis of the carrying member outside an end of the magnetic member, there is a region in which a magnetic flux density of a first magnetic polarity converges toward zero; and wherein a ratio of a volume, per unit length, of a portion of the magnetic member which has a surface magnetic pole of a second magnetic polarity which is different from the first magnetic polarity in a longitudinal end portion to that in a longitudinally central portion is smaller than a ratio of a volume of a portion of the magnetic member which has a surface magnetic pole of the first magnetic polarity in a longitudinal end portion to that in a longitudinally central portion. | 08-09-2012 |
20120251191 | RESIN-COATED CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE RESIN-COATED CARRIER - Object of the present invention is to provide a resin-coated carrier for an electrophotographic developer with reduced carrier weight, carrier beads carry over is prevented, and further, excellent in carrier strength and stable charging property in endurance printing. To achieve the object, the carrier having a coated resin layer on the surface of a porous ferrite core material and the pore volume and the peak pore size of the porous ferrite core material are 55 to 160 mm | 10-04-2012 |
20120294656 | DEVELOPMENT ROLL FOR ELECTROPHOTOGRAPHIC EQUIPMENT - A development roll for electrophotographic equipment includes a shaft body, a rubber elastic layer formed by molding on an outer circumference of the shaft body and having many convex portions formed by transfer molding on the outer circumferential surface thereof, and a coating layer disposed on an outer circumference of the rubber elastic layer. The coating layer is composed of a cured body of a coating material containing (A) a thermoplastic urethane having a number-average molecular weight in the range of 50,000 to 200,000, (B) a polyol having a number-average molecular weight in the range of 500 to 4,000, and (C) a curing agent. The mass percentages a, b, and c of the components (A), (B), and (C) satisfy the following expressions: a+b+c=100, 40≦a≦75, 5≦b≦20, and 20≦c. | 11-22-2012 |
20130004211 | DEVELOPING ROLLER, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - Provided is the following developer carrying member. The member has high charge-providing performance even under a high-temperature, high-humidity environment, and its surface layer hardly peels off its elastic layer even after long-term standing under the high-temperature, high-humidity environment. The developer carrying member comprises a mandrel, an elastic layer including a silicone rubber, and a surface layer covering a surface of the elastic layer, and the surface layer comprises a binder resin, and a copolymer having structural units of formula (1) and formula (2). R1 represents an alkyl group having 10-18 carbon atoms, R2 represents a methyl group or a hydrogen atom, R3 represents an alkylene group having 1-4 carbon atoms, X | 01-03-2013 |
20130058685 | DEVELOPING ROLLER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A developing roller including: a core metal; and an elastic layer formed on an outer circumference of the core metal, wherein an outermost surface of the developing roller is roughened, and wherein a difference between a maximum value and a minimum value of indentation power is 10% to 21%, wherein the indentation power is measured by a micro-indentation test at 120 locations with 3 degrees apart on a circumference of the developing roller, which is at a center of the developing roller with respect to a longitudinal direction. | 03-07-2013 |
20130071148 | DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME - A development device includes a developer bearer to carry by rotation developer to a development range facing a latent image bearer, a planar developer regulator disposed to contact a surface of the developer bearer to adjust an amount of developer carried to the development range, and a lateral end seal to contact an axial end portion of the developer bearer. The developer bearer includes an uneven surface range having projections and recesses and including an axial center of the developer bearer and smooth surface ranges positioned outside the uneven surface range in an axial direction of the developer bearer, and the lateral end seal is disposed astride the uneven surface range and the smooth surface range of the developer bearer. | 03-21-2013 |
20130089362 | DEVELOPING ROLLER - A developing roller is provided, which is particularly used in an image forming apparatus of a highly durable design and is free from toner leakage even after formation of a predetermined number of images. Opposite end regions ( | 04-11-2013 |
20130142548 | DEVELOPMENT ROLL FOR ELECTROPHOTOGRAPHIC EQUIPMENT - A development roll for electrophotographic equipment includes a shaft body and a rubber elastic layer disposed on the outer circumference of the shaft body. The rubber elastic layer is composed of a crosslinked body of a composition containing a liquid or millable silicone rubber, a crosslinking agent, an electronically conductive agent, and an ionic liquid. The composition contains the ionic liquid in the amount in the range of 0.1 to 5.1 parts by mass relative to 100 parts by mass of the total amount of the liquid or millable silicone rubber and the crosslinking agent. | 06-06-2013 |
20130216279 | DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS - A development device includes a developer carrier configured to supply developer on a latent image formed on a latent image carrier to visualize the latent image. Wherein the developer carrier includes: an elastic layer formed on an outer circumferential surface of a conductive support body, the elastic layer including urethane rubber; and a top layer formed by treating a surface of the elastic layer with treatment solution that includes urethane polymer, silicone-based additive and conductive agent. The top layer includes convex parts that include the urethane rubber and concave parts in which the silicone-based additive and the conductive agent are laminated. | 08-22-2013 |
20130223892 | DEVELOPING MEMBER - Provided is a developing roller including elastic layer and resin layer adhered to each other and having an appropriately resistance, thereby suppressing fogging. The developing member comprises a mandrel; an elastic layer; and a resin layer, wherein: the resin layer comprises polyurethane resin obtained by isocyanate and polyol; and the elastic layer includes cured silicone rubber composition comprising (a)-(d):
| 08-29-2013 |
20130223893 | DEVELOPING ROLL FOR ELCTROPHOTOGRAPHIC MACHINE - Provided is a developing roll for use in an electrophotographic machine capable of preventing an ion conductive agent from blooming and retaining long-term charge decay characteristics. The roll ( | 08-29-2013 |
20130243500 | Electrophotographic Roller with Resistance to Nip Banding - An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media. | 09-19-2013 |
20130272755 | Developing Roller, Development Apparatus, and Image-Forming Device - Provided are a developing roller having an elastic layer formed on an outer circumferential face of a shaft and a coating layer formed on an outer circumferential face of the elastic layer, wherein the coating layer is composed of first coating layers that are formed at respective edges across the elastic layer, and a second coating layer formed between the first coating layers, and wherein the first coating layers contain a resin obtained through a reaction of a polyol with a silane-coupling agent, fluororesin particles, and an electric conductivity agent; and the second coating layer contains a urethane resin, an ionic liquid, an electric conductivity agent, and filler particles; and a development apparatus and an image-forming device having the developing roller. The provided are capable of keeping the image quality high and of arresting leakage of the toner satisfactorily. | 10-17-2013 |
20130287454 | DEVELOPING MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is a developing member capable of exerting stable performance under various environments. The developing member comprises a mandrel, an elastic layer formed on a periphery of the mandrel, and a surface layer covering a peripheral surface of the elastic layer. The surface layer contains a polyurethane and zinc oxide particles dispersed in the polyurethane, and the polyurethane has, between two adjacent urethane bonds, one or both of structures selected from structures according to the following item (A) and the following item (B): (A) a structure represented by the following structural formula ( | 10-31-2013 |
20130302070 | DEVELOPING ROLLER - Provided is a developing roller in which printing quality, in particular, one-dot level fine line printing quality is improved by securing a high resistance value and high surface potential on the surface layer. The elastic roller comprises successively on the outer periphery of a shaft | 11-14-2013 |
20130343789 | Electrically Conductive Roller, Development Apparatus, and Image-Forming Device - Provided is an electrically conductive roller capable of preventing the occurrence of filming for a long time and of providing toners with a desired quantity of electric charge, and a development apparatus and an image-forming device capable of forming high quality images for a long time. The electrically conductive roller has a urethane coat layer that contains a urethane resin and a particulate amino resin, wherein the urethane coat layer is formed on an outer circumferential face of an elastic layer, and a development apparatus and image-forming device equipped with the electrically conductive roller. | 12-26-2013 |
20140023410 | DEVELOPING ROLLER - A developing roller is provided which is capable of forming a toner layer having the most uniform possible thickness on an outer peripheral surface of a roller body thereof. The roller body ( | 01-23-2014 |
20140023411 | DEVELOPING ROLLER - A developing roller is provided which is capable of forming a toner layer having the most uniform possible thickness on an outer peripheral surface of a roller body thereof. The roller body ( | 01-23-2014 |
20140064797 | DEVELOPING MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - A high-quality developing member which excels in filming resistance and excels in leak resistance despite high electroconductivity is provided. The developing member includes an electroconductive substrate, an elastic layer formed on the substrate, and a surface layer which covers a surface of the elastic layer. The surface layer includes a first resin which has, between two adjacent urethane linkages, a structure represented by the structural formula (1) and one or both of structures selected from the group consisting of a structure represented by the structural formula (2) and a structure represented by the structural formula (3), a second resin which has a structure represented by the structural formula (4) and one or both of structures selected from the group consisting of a structure represented by the structural formula (5) and a structure represented by the structural formula (6), and an electronically conductive filler. | 03-06-2014 |
20140072350 | DEVELOPING MEMBERINCLUDING ELASTIC MEMBER CONTAINING CURED PRODUCT OF ADDITION -CURING SILICONE RUBBER MIXTURE. PROCESSING CARTRIDGE INCLUDING THE DEVELOPING MEMBER, AND ELECTROPHOTOGRAPHIC APPARATUS INCLUDING THE DEVELOPING MEMBER - A developing roller includes: a mandrel; an elastic layer provided for an outer periphery of the mandrel, the elastic layer including an addition-curing silicone rubber; and a surface layer provided for an outer periphery of the elastic layer, in which: the elastic layer includes a compound represented by the following formula (1); when the content of such a compound that n in the formula (1) represents an integer of 3 to 12 in the elastic layer is represented by P1, and the content of such a compound that n in the formula (1) represents an integer of 13 to 20 in the elastic layer is represented by P2, P1+P2 is 5,000 ppm by mass to 12,000 ppm by mass; and P1 is 1,500 ppm by mass to 6,000 ppm by mass (In the formula (1), n represents an integer of 3 to 20): | 03-13-2014 |
20140079442 | DEVELOPING MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - A high quality developing member that is excellent in deformation recovery property under a high temperature and that also satisfies filming resistance under a low temperature is provided. The developing member of the present invention includes a mandrel, an elastic layer formed on the outer periphery surface of the mandrel, and a surface layer covering the outer periphery surface of the elastic layer, wherein the surface layer contains a first resin and a second resin, the first resin has a particular structure between adjacent two urethane linkages, and the second resin is a resin having a particular structure and having a glass transition point Tg of 20° C. or higher and 120° C. or lower. | 03-20-2014 |
20140126935 | DEVELOPING ROLLER - A developing roller in which the decay rate of the surface potential is high and in which an image failure caused by the accumulation of electric charge does not occur is provided. The developing roller | 05-08-2014 |
20140126936 | HIGH RESISTIVITY COATING COMPOSITIONS HAVING UNIQUE PERCOLATION BEHAVIOR, AND ELECTROSTATIC IMAGE DEVELOPING SYSTEMS AND COMPONENTS THEREOF INCORPORATING SAME - Disclosed herein are resistive composites comprising at least one resin; at least one carbon black having a surface hydrophobically modified with at least one organic group, the at least one organic group having a molecular weight of the composite of 4000 or less and comprising the formula —X(G)-, wherein X is directly attached to the at least one carbon black and is selected from arylene, heteroarylene, and alkylene, G is a substituent of X, and —X(G)- is nonionic; and wherein the resistive composite has a volume resistivity, volume fraction, X | 05-08-2014 |
20140212184 | DEVELOPING ROLLER, AND DEVELOPING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING METHOD AND APPARATUS USING THE DEVELOPING ROLLER - A developing roller to bear toner thereon is provided. The developing roller includes a cylindrical electroconductive substrate; an electroconductive elastic layer located on a peripheral surface of the cylindrical electroconductive substrate; and a toner bearing layer located on a peripheral surface of the electroconductive elastic layer. The toner bearing layer includes a polyurethane resin, which is a reaction product of at least an isocyanate compound having an isocyanurate structure and a polyol at a NCO/OH molar ratio of from 90 to 110. The toner bearing layer has a water contact angle of from 135° to 155°, and a static friction coefficient of from 0.10 to 0.15. | 07-31-2014 |
20140321888 | DEVELOPING ROLLER, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing roller, including: a shaft containing a metal; an elastic layer on a circumference of the shaft; and a surface layer on a circumferential surface of the elastic layer, wherein the surface layer contains: a polyurethane which is a reaction product between a fluoroethylene vinyl ether copolymer and an isocyanurate form of an isocyanate; and particles having an average primary particle diameter of 5 nm to 30 nm, and wherein the polyurethane has a peak intensity ratio of a NCO group to a hydroxyl group of 5.6 to 8.8 in an infrared absorption spectrum obtained by an attenuated total reflection method. | 10-30-2014 |
20150078790 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - Provided is a developing device, including: a toner having an average circularity of from 0.880 to 0.960; and a developing roller configured to rotate while carrying the toner, wherein the developing roller has on a surface thereof, a plurality of streaky grooves each formed in a circumferential direction, and a plurality of steps each formed in a direction of a rotation axis. | 03-19-2015 |
20150093158 | IMAGE FORMING APPARATUS - An image forming apparatus suppressing jitter from occurring includes an image carrier, and a developer carrier supplying a developer to the image carrier, wherein the developer carrier includes an elastic layer having a thickness of 2.5 mm or less and having an MD-1 hardness of 40 degrees or more. | 04-02-2015 |
20150104225 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus uses a developer containing toner particles. The image forming apparatus includes a toner-particle bearing member for bearing the toner particles. Each toner particle includes a toner core containing a binder resin and a shell layer coating a surface of the toner core. The toner-particle bearing member includes a substrate and a surface layer coating a surface of the substrate. The surface layer and the shell layer are each formed from a resin containing a thermosetting resin. | 04-16-2015 |
20150132031 | DEVELOPER CARRYING MEMBER, DEVELOPING ASSEMBLY, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing roller that is capable of carrying toner on a surface thereof, and that supplies the toner carried on the surface to a surface of a photosensitive drum when a voltage is applied thereto, includes: a rubber layer; and a surface layer that covers the rubber layer, contains alumina, and has a higher volume resistivity than the rubber layer. | 05-14-2015 |
20150132032 | DEVELOPER CARRYING MEMBER, DEVELOPING ASSEMBLY, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing roller that is capable of carrying toner on a surface thereof, and that supplies the toner carried on the surface to a surface of a photosensitive drum when a voltage is applied thereto, includes: an elastic layer; and a surface layer that covers the elastic layer and contains aluminum oxide, wherein the aluminum oxide of the surface layer contains tetracoordinated aluminum atoms and hexacoordinated aluminum atoms existing in a higher proportion than the tetracoordinated aluminum atoms. | 05-14-2015 |
20150132033 | TONER CARRIER - A toner carrier includes a metal core, a barrel formed on an outer circumference of the metal core and including at least an elastic layer, and a coating formed on outer circumferences of both ends of the barrel. The coating has a thickness and a width of an outer circumference of the coating is different from a width of an inner circumference of the coating. The width is from an end surface of the barrel along an axis of the barrel, and the width of the outer circumference is larger than the width of the inner circumference so that the end surface of the coating is reversely inclined. | 05-14-2015 |
20150301473 | DEVELOPING ROLLER AND DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - The present disclosure relates to a developing roller having a conductive support base, a surface of which is covered with a resin layer, wherein the resin layer contains conductive fine particles and soluble nylon serving as a binder resin, and the resin layer surface has a surface roughness Ra of at least 0.4 μm, a waviness curve cycle of 50 to 400 μm, and a waviness curve height of 2 to 10 μm. | 10-22-2015 |
20150355571 | SEMICONDUCTIVE ROLLER - A semiconductive roller ( | 12-10-2015 |
20160011541 | TONER CONVEYANCE ROLLER AND METHOD FOR MANUFACTURING TONER CONVEYANCE ROLLER | 01-14-2016 |
20160018751 | ROLLER, METHOD FOR MANUFACTURING SAME AND IMAGE FORMING DEVICE USING SAME - Provided are a roller capable of suppressing the generation of cutting waste from the cut surface of a foam layer at the end of the roller in the axial direction thereof, a method of manufacturing especially a conductive roller, and an image forming device using the roller. The roller is provided with a shaft | 01-21-2016 |
20160033894 | DEVELOPER CARRYING MEMBER AND IMAGE FORMING APPARATUS - Provided is a developer carrying member which depends on a sheet-passing speed to a small extent while maintaining satisfactory developability, and can stably suppress a fogging amount with time. The developer carrying member includes: an electro-conductive mandrel; and an electro-conductive elastic layer, in which: the elastic layer contains a resin j, an electro-semiconductive particle p, and an electro-conductive particle c; and when an electroconductivity of the resin j is defined as σ | 02-04-2016 |
20160139534 | DEVELOPING ROLLER, AND IMAGE FORMING APPARATUS - A developing roller is provided, which is capable of controlling a solid black density and a dot density at higher levels than currently available levels. An image forming apparatus employing the developing roller is also provided. The developing roller ( | 05-19-2016 |
20160252842 | MEMBER FOR ELECTROPHOTOGRAPHY, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS | 09-01-2016 |