Entries |
Document | Title | Date |
20080205942 | Developing Roller, Developing Unit, and Image Forming Apparatus - A developing roller includes a hollow cylindrical or solid cylindrical main body having a grooved portion that is formed in the outer circumferential surface of the main body and that supports toner. The grooved portion includes a plurality of first grooves parallel to each other and a plurality of second grooves parallel to each other and intersecting with the first grooves. The centers of four intersections at which adjacent two of the first grooves and adjacent two of the second grooves intersect differ from each other in the position in the direction of the axis of the main body. | 08-28-2008 |
20080226356 | IMAGE DEVELOPER USING ONE-COMPONENT DEVELOPER - An image developer using a one-component developer, Including a developing roller visualizing an electrostatic latent image formed on an image bearer with a pulverized toner; and a feed roller feeding the pulverized toner to the developing roller while contacting thereto, wherein the pulverized toner includes a parent toner; a wax; and an external additive comprising an additive having a number-average particle diameter of from 20 to 60 nm and adhering to the surface of the parent toner at an adherence strength of from 50 to 70%, and wherein the following relationships (1) to (3) are satisfied: | 09-18-2008 |
20080240796 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, DEVELOPING APPARATUS, AND COUPLING MEMBER - A developing device usable with an electrophotographic image forming apparatus includes a driving shaft having a rotating force applying portion, and a movable member. The developing device is mounted to the moving member and includes a developing roller, and a coupling member that includes a rotating force receiving portion and a rotating force applying portion. The coupling member is capable of taking (i) a rotational force transmitting angular position for transmitting the rotational force to the developing roller, (ii) a pre-engagement angular position taken before the coupling member is engaged with the rotating force applying portion, in which the coupling member is inclined away from the rotational force transmitting angular position, and (iii) a disengaging angular position, which enables the coupling member to disengage from the driving shaft, and inclines the coupling member away from the rotational force transmitting angular position, in a direction opposite to the pre-engagement angular position. | 10-02-2008 |
20080279597 | Apparatus and Method for Development of Potential Images, Produced on an Intermediate Image Carrier, for an Electrographic Printing or Copying Device - In a system or method for development of potential images of images to be printed and generated on an intermediate image carrier using a developer fluid comprising charged toner particles and developer fluid in an electrographic printing or copying device, a feed device is provided comprising as function elements at least one chamber scraper, a raster element comprising cups to receiver the developer fluid, and at least one first flow element arranged in the chamber scraper. Between the at least one flow element and the raster element an electrical voltage is supplied such that a toner particle concentration in the cups of the raster element is increased. An application device accepts the developer fluid from the feed device and supplies it to the intermediate image carrier. | 11-13-2008 |
20080298851 | Image Formation Apparatus and Image Formation System - The invention provides, as an aspect thereof, an image formation apparatus that includes: an image carrier that carries a latent image; a toner carrier that has, on a surface of the toner carrier, a concave portion arrayed in a regular pattern so as to carry toner, and develops the latent image that is carried on the image carrier by means of the toner carried in the concave portion; and a voltage application section that applies a development voltage to the toner carrier for the purpose of the development of the latent image. In the configuration of an image formation apparatus according to the above-described aspect of the invention, immediately after that the toner carrier has developed the latent image, which is carried on the image carrier, by means of the toner carried in the concave portion in response to the application of the development bias to the toner carrier by the voltage application section, at least one layer of the toner remains carried in the concave portion. | 12-04-2008 |
20080298852 | Developing Device, Image Forming Apparatus, and Image Forming System - A developing device is provided with a toner bearing member that bears toner having core particles and a particulate external additive externally added to the core particles, and that develops a latent image borne on an image bearing member using the toner, the toner bearing member being rotatable and having projecting sections arranged in a regular manner on a surface of the toner bearing member; and a regulation member that regulates an amount of toner borne on a surface of the toner bearing member by coming into contact with that surface at a contact section, the regulation member being arranged so that a longitudinal direction of the regulation member runs along an axial direction of the toner bearing member, and so that a leading edge of the regulation member in a lateral direction and a thickness direction faces an upstream side in a rotating direction of the toner bearing member, wherein in the case where a volume mean particle size of the toner is set to a toner particle size A, a volume mean particle size of the external additive is set to an external additive particle size B, a ten-point average roughness of the projecting sections is set to a protrusion roughness C, and a distance between the leading edge and the projecting sections in the case where the leading edge of the regulation member faces the projecting sections is set to a distance D, a relationship among sizes of the toner particle size A, the external additive particle size B, the protrusion roughness C, and the distance D is so that the protrusion roughness C12-04-2008 | |
20080298853 | Developing Device, Image Forming Apparatus, Image Forming System, Developing Method, and Toner Bearing Member - The present invention provides a developing device that includes a toner bearing member that includes regularly arranged projection sections and depressed sections for bearing toner, and that develops a latent image borne on an image bearing member with the toner borne on the projection sections and the depressed sections, wherein the latent image is developed in a state in which a projection section covering ratio at which toner contacting the projection sections covers the projection sections is smaller than a depressed section covering ratio at which toner contacting the depressed sections covers the depressed sections. | 12-04-2008 |
20080298854 | Developing device and image forming apparatus - A developing device includes a developer supporting member abutting against an image supporting member for developing a static latent image on the image supporting member. In a state that a film member is disposed between the image supporting member and the developer supporting member, it is arranged such that the film member is extended with a tensional force N (N) when the image supporting member and the developer supporting member rotate. The tensional force N has a relationship as follows: | 12-04-2008 |
20090003888 | Developing Apparatus, Image Forming Apparatus, Image Forming System and Image Forming Method - A developer carrier has concave portions regularly arranged on the surface thereof and being rotatable with a developer thereon. A contact member is made of an elastic rubber material, is in contact with the surface of the developer carrier, and vibrates with the rotation of the developer carrier. A value obtained by dividing a movement speed of the surface at the time of rotation of the developer carrier by a pitch of the concave portions in a peripheral direction of the developer carrier is smaller than the number of vibrations of the contact member when a loss tangent obtained by dividing a loss elastic modulus of the contact member by a storage elastic modulus is the greatest. | 01-01-2009 |
20090028612 | IMAGE FORMING APPARATUS - In a configuration in which a plurality of developing units is provided, an influx of air into one developing unit from another developing unit can be blocked with a simple configuration. An operation section for a developing unit that is not in operation rotates a developer roll in the reverse direction to move developer accumulated on a pickoff pole, and fills a clearance formed between a housing and the developer roll with the developer so that the air flow of the developing unit that is not in operation is blocked. Accordingly, even if a difference in pressure between a developing unit that is in operation and a developing unit that is not in operation occurs, an air flow from the developing unit that is in operation to the developing unit that is not in operation is not apt to be formed, and an influx of air into the developing unit that is not in operation is blocked. | 01-29-2009 |
20090060592 | CAMMING METHOD AND APPARATUS FOR CONTROLLING COLOR DEVELOPERS - A developer camming apparatus connected to a developer unit, including a slide, a motor, and an encoder, wherein the encoder determines a distance a developer unit is from the photoreceptor, wherein the encoder allows the developer unit to be sufficiently close to effect application of toner to the photoreceptor from the developer unit, but also does not allow the developer unit to contact the photoreceptor during a print job. | 03-05-2009 |
20090074474 | Rotary member, developing device, and image forming apparatus - According to an aspect of the present invention, there is provided a rotary member including: a rotating main body; and support members that are formed to be supported by bearings, wherein each of the support members includes: a spindle core formed of a first metal; and a cylindrical sheath that sheathes a portion of the spindle core where slidably contacting respective one of the bearings and that is formed of a second metal different from the first metal. | 03-19-2009 |
20090154963 | HYBRID DEVELOPING CARRIER, HYBRID DEVELOPING DEVICE AND IMAGE-FORMING APPARATUS - A hybrid developing carrier, comprising a resin layer formed on an outermost surface, wherein the surface of said resin layer is provided with sites formed of an inorganic compound having basic points or acidic points and sites where the resin forming the resin layer is exposed, a hybrid developing device equipped with the hybrid developing carrier, and an image-forming apparatus equipped with the hybrid developing device. | 06-18-2009 |
20090169270 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - Provided is an image forming apparatus including at least a latent image bearing member, a latent electrostatic image forming unit, a developing unit which includes at least a developing roller and a supply roller, and a transfer unit, wherein both of a diameter R (mm) of the developing roller and a diameter R′ (mm) of the supply roller are 12 mm or less; the toner contains at least a binder resin, a wax, and a colorant with the wax having a melting point of 75° C. or less; an amount of the wax exposed on a surface of the toner is 10 mg/g to 30 mg/g; and when a diameter (mm) of the developing roller is represented by R the toner has a torque T (mNm) satisfying the inequation, 20/R07-02-2009 | |
20090169271 | ELECTRONIC PHOTOGRAPH PRINTER - An electronic photograph printer is provided for elastically biasing the developer apparatus having the photosensitive drum by the pressing mechanism and for pressing the developer roll onto the photosensitive drum. In this configuration, quality in the developed image can be ensured by the trackable movement of the developer roll relative to the photosensitive drum in the electronic photograph printer. In addition, adjustable range for positioning the developer roll and operability and maintainability within the developer apparatus can be achieved. | 07-02-2009 |
20090324300 | ELECTROPHOTOGRAPHIC CARRIER AND USE THEREOF - The present invention provides an electrophotographic carrier which includes a core particle, a first resin layer containing a charge-generating material for coating the core particle, and a second resin layer containing a hole-transporting material for coating the first resin layer. The invention also provides a two-component developer comprising said carrier, and an image-forming process and apparatus using said developer. According to the invention, high quality images can be formed, with excellent image density (especially when developing solid images) and less fogging. | 12-31-2009 |
20100061775 | Image Forming Apparatus and Image Forming Method - An image forming apparatus includes: a latent image holder that holds on its surface an electrostatic latent image in which an image portion and a non-image portion have different potentials; a toner carrying roller that carries a toner layer including both contact toner which directly contacts a surface of the roller and non-contact toner which contacts the contact toner but does not contact the surface of the roller; and an electric field forming unit that forms an alternating electric field to cause an electric field strength exerted between the non-image portion on the surface of the latent image holder and the surface of the toner carrying roller to be lower than a contact toner fly start electric field strength and higher than a non-contact toner fly start electric field strength, between the latent image holder and the toner carrying roller, as a toner fly electric field. | 03-11-2010 |
20100111576 | METHOD OF USING MULTIPLE DEVELOPING MEMBERS IN A SINGLE-COMPONENT DEVELOPING SYSTEM - The present invention is directed to a non-contact, single-component developing system for electrophotographic devices that enables high speed, high quality development and color development without an accumulator, or some other intermediate transfer member by employing a plurality of ancillary developing members operating in tandem with a toner-carrying member to facilitate toner detachment from the toner-carrying member. The developing system of the present invention utilizes high electrostatic forces to enable toner jump without AC voltages and exploits toner adhesion forces adhering toner particles to a surface (e.g., a latent image-bearing member) to facilitate high speed development. | 05-06-2010 |
20100150616 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer transporting member arranged so that its circumferential surface faces an image carrier for carrying an electrostatic image on its surface, the developer transporting member being rotated in a circumferential direction while carrying the developer on its circumferential surface to transport a developer to a developing region in which the surface of the image carrier and the circumferential surface of the developer transporting member face each other, and having a groove extending in its circumferential direction outside in an axial direction of a developer carrying region; and a suction port arranged at least at one of an upstream side region and a downstream side region of the developer transporting member, wherein the upstream side region is located adjacent to and upstream of the developing region and the downstream side region is located adjacent to and downstream of the developing region in the rotating direction of the developer transporting member. | 06-17-2010 |
20100158579 | TONER TRANSFER ROLLER AND IMAGE FORMING DEVICE USING THE SAME - The present invention provides a toner transfer roller which exhibits decreased toner charge (Q/M) and an enhanced toner transfer rate (M/A). Specifically, the present invention provides: a toner transfer roller for a negatively chargeable toner, comprising a rotating shaft and a polyurethane foam body layer provided to surround the rotating shaft, wherein the polyurethane foam body layer contains a charge control agent which is negatively chargeable with respect to polyurethane in triboelectric series; and a toner transfer roller for a positively chargeable toner, comprising said rotating shaft and said polyurethane foam body layer, wherein said polyurethane foam body layer contains a charge control agent which is positively chargeable with respect to polyurethane in triboelectric series. | 06-24-2010 |
20100284711 | TONER ROLLER WITH AN INSULATION LAYER COMPRISING POLYMER - In a toner roller for use in a developer station for a printer or copier, a roller-shaped base body has an electrically conductive surface on which is arranged an insulation layer. The insulation layer comprises plastic and has a layer thickness and arranged between 150 μm and 1000 μm. The insulation layer also comprises a filler where the filler comprises electrically conductive additives. | 11-11-2010 |
20100310279 | IMAGE FORMING APPARATUS - An image forming apparatus | 12-09-2010 |
20110052272 | DEVELOPER MATERIAL CARRYING BODY, DEVELOPING UNIT, AND IMAGE FORMING APPARATUS - A developer material carrying body rotates in contact with an image carrying body on which an electrostatic latent image is formed. The developer material carrying body deposits a developer material to the electrostatic latent image. The developer material carrying body includes a surface having a surface potential (Vo) 0.15 seconds after having been charged, and a relaxation time (τ) required for the surface potential changes to change from Vo to Vo/e. The surface potential and relaxation time are related such that 2.0≦Vo≦10 and 0<τ<0.20. | 03-03-2011 |
20110158703 | DEVELOPING APPARATUS AND PROCESS CARTRIDGE - A developing apparatus includes a developer bearing member, a supporting portion, an urging unit, and a movement regulating member. The developer bearing member rotates while bearing developer. The supporting portion rotatably and movably supports the developer bearing member and includes a recessed portion that is formed into a concave shape. The urging unit urges the developer bearing member in a predetermined direction of the rotational axis direction. The movement regulating member is fitted to an end of the developer bearing member and is movable together with the developer bearing member. The movement regulating member may move to a first position where movement in a perpendicular direction is regulated by coming into contact with a portion of the supporting portion and a second position that is a position apart from the first position and movable in the perpendicular direction without coming into contact with the portion of the supporting portion. | 06-30-2011 |
20110158704 | DEVELOPING CARTRIDGE - A developing cartridge includes: a developing roller that is rotatable about a developing roller axis line, which extends in a predetermined direction; a supply roller, which is rotatable about a supply roller axis line, which extends in the predetermined direction, and which supplies developer to the developing roller; a developing roller driving gear that is connected to the developing roller; a supply roller driving gear that is connected to the supply roller; and a driving force transmission gear, which is rotatable about a gear axis line extending in the predetermined direction, and which includes: a first gear part meshed with the developing roller driving gear; and a second gear part meshed with the supply roller driving gear. The driving force transmission gear transmits driving force to the developing roller driving gear and the supply roller driving gear. | 06-30-2011 |
20110182627 | Processing Unit - A processing unit is provided. He processing unit comprises: a housing; a developing roller that carries developer on a surface thereof, the developing roller including, a hollow roller body, and a covering layer covering an outer circumferential surface of the roller body; a photosensitive drum that contacts the developing roller, wherein an end face of the photosensitive drum at a first side in an axial direction of the developing roller is located at an outer side in the axial direction compared to an end face of the developing roller at the first side in the axial direction, and wherein the developer on the developing roller is supplied to the photosensitive drum; and a supporting member that contacts an inner circumferential surface of the roller body at the first side in the axial direction, and supports the developing roller rotatably in the housing. | 07-28-2011 |
20110243615 | IMAGE FORMING APPARATUS - The image forming apparatus is provided with first spacing members having an outer diameter larger than that of a first developing roller, which first spacing members are disposed at two ends of the first developing roller coaxially with the first developing roller, second spacing members having an outer diameter larger than that of a second developing roller, which second spacing rollers are disposed at two ends of the second developing roller coaxially with the second developing roller, a first retaining member, a second retaining member, a first biasing member, a second biasing member. | 10-06-2011 |
20120163879 | Developing device and image forming apparatus including the same - A developing roller including a housing containing toner; and a developing roller installed in the housing and supplies the toner to an electrostatic latent image formed on a photoconductor, the developing roller including a cylindrical unit in the form of a hollow pipe and a power transmission unit connected to one end of the cylindrical unit and connected to a power transmission member for rotating the developing roller. Both ends of the cylindrical unit are supported by the housing and the power transmission unit is not restricted by the housing. Both ends of the cylindrical unit are supported by the housing and the power transmission unit is not restricted by the housing. | 06-28-2012 |
20120219331 | IMAGE FORMING UNIT AND IMAGE FORMING APPARATUS - An image forming unit includes a cylindrical rotatable image carrier that holds an electrostatic latent image, a cylindrical rotatable developer carrier that develops the held electrostatic latent image on the image carrier, and a cylindrical rotatable developer supplying member that supplies a developer to the developer carrier. Distance controlling members control the distance between axes of the image carrier and the developer carrier. A developer carrier gear is fixed on the developer carrier. A developer supplying member gear is fixed on the developer supplying member. A cylindrical rotatable idle gear engages with the developer carrier gear and the developer supplying member gear. A link member maintains constant the distance between rotational axes of the developer supplying member and the idle gear. Another link member maintains constant the distance between rotational axes of the developer carrier gear and the idle gear. A connecting member connects the two link members. | 08-30-2012 |
20120230738 | DRIVING FORCE TRANSMISSION MECHANISM AND IMAGE FORMING APPARATUS - A driving force transmission mechanism includes a connection for integrally rotating a driving shaft on the driving source side and a driven shaft of a rotary member. The connection includes a tubular boss portion; and a fitting shaft portion fitted into the tubular boss portion. An inner shaft portion is provided in a projecting manner from bottom center of the tubular boss portion toward inside the tubular boss portion. An inner recessed portion into which the inner shaft portion fits is provided in center of a leading edge plane for fitting of the fitting shaft portion. Micro gaps are provided between an inner surface of the tubular boss portion and an outer surface of the fitting shaft portion and between an inner surface of the inner recessed portion and an outer surface of the inner shaft portion. | 09-13-2012 |
20120263505 | Toner-Particle Bearing Roller, Developing Device, and Image Forming Apparatus - A developing device includes a toner particle-bearing roller that bears toner particles on its surface and develops a latent image borne by an image-bearing member with those toner particles, the toner particle-bearing roller has a projection portion disposed on its surface, the projection portion having a top surface having a flat portion, and a width of the top surface being equal to or more than a volume average particle diameter of the toner particles. | 10-18-2012 |
20120263506 | Process Unit - A process unit includes a drum frame supporting a photoconductor drum and a development frame supporting a development roller. The development cartridge is swingably supported by the drum frame at a coupling joint provided at a first side of the development frame and a support portion provided at a second side of the development frame. A center of rotation of the development roller is located in a position shifted from a line segment connecting a center of rotation of the coupling joint and a center of rotation of the photoconductor drum to an upstream side with respect to a direction of rotation of the coupling joint as viewed in an axial direction of the development roller, such that the development roller is pressed against the photoconductor drum by the action of the rotatory force received by the coupling joint. | 10-18-2012 |
20120269556 | Image Forming Device, Process Cartridge, and Developer Cartridge - A developer cartridge according to one aspect of the invention is attachable to a photoconductor unit that comprises a photoconductive drum. The developer cartridge may comprise a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side; a developing roller located at the first side of the developing frame so as to receive developer conveyed from the developer container in a first direction; a contact terminal located at the second side of the developing frame; and a memory electrically connected to the contact terminal, wherein the first side is downstream in the first direction from the second side. | 10-25-2012 |
20120294655 | DEVELOPMENT ROLLER, DEVELOPMENT DEVICE, PROCESS CARTRIDGE AND IMAGE-FORMING APPARATUS - A development roller includes a magnet roller and a rotatably supported development sleeve including inside thereof the magnet roller, the development sleeve is formed in a cylindrical shape and configured such that a shaft center of the cylindrical shape is inconsistent with a rotation axis of the development sleeve, the development sleeve includes an outer surface provided with many circular or elliptical depressions in a planar view, the depressions being regularly arranged at intervals, and a depth of the depression provided in a portion of the outer surface close to the rotation axis is larger than a depth of the depression provided in a portion of the outer surface far from the rotation axis. | 11-22-2012 |
20130051866 | Developing Device Provided with Developing Roller and Supply Roller - In a developing device, a developing roller has: a first rotational shaft extending in a first direction; and a first roller body covering the first rotational shaft and configured to carry developer. A supply roller has: a second rotational shaft extending in the first direction; and a second roller body covering the second rotational shaft and configured to supply the developer to the developing roller. A housing accommodates the developing roller, the supply roller, and the developer. The housing includes a first wall and a second wall opposed with each other in the first direction. The first wall is formed with a first cutout. The second wall being formed with a second cutout. The first rotational shaft and the second rotational shaft are positioned in both the first cutout and the second cutout when projected in the first direction. | 02-28-2013 |
20130078006 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer supporting member having an elastic layer and a surface layer covering the elastic layer for supporting developer; and a developer layer regulating member arranged to abut against the surface layer for regulating a layer thickness of the developer on the surface layer. The surface layer contains at least carbon black. The developer supporting member is configured so that the following equation (1) is satisfied when the surface layer has a dynamic friction coefficient μ between 0.4 and 0.9 (0.4≦μ≦0.9) and a ten-point average roughness Rz (μm) between 2 μm and 6 μm (2≦Rz≦6): | 03-28-2013 |
20130121733 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - Disclosed herein is a developing device. The developing device includes a housing having a toner containing unit and a developing unit, a partition member, having a toner supply window, coupled to the housing to partition the toner containing unit and the developing unit, a barrier film attached to the partition member to close the toner supply window, the barrier film having one end exposed out of the housing through a discharge port provided at a side wall of the housing, and a sheet member to guide and discharge the barrier film out of the housing. | 05-16-2013 |
20130195516 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes two developer-transporting members, a container, and four gap retainers. The container contains a developer and rotatably supports rotation shafts of the developer-transporting members using side walls located on both end portions. The gap retainers are supported at end portions of the developer-transporting members and are brought into contact with a subjected-to-development member or a supporter to maintain a gap between the subjected-to-development member and each developer-transporting member. A force with which the two developer-transporting members are pressed toward the subjected-to-development member is applied to the container and all the gap retainers are brought into contact with the subjected-to-development member or the supporter, while axes of rotation of the two developer-transporting members are allowed to become non-parallel with an axis of rotation of the subjected-to-development member. | 08-01-2013 |
20130216275 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, DEVELOPING APPARATUS, AND COUPLING MEMBER - A developing device usable with an electrophotographic image forming apparatus. The developing device includes a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum. The developing device also includes a coupling member for transmitting a rotating force to the developing roller. The coupling member includes a rotating force receiving portion engageable with a rotating force applying portion to receive a rotating force from a driving shaft, and a rotating force transmitting portion for transmitting the rotating force received through the rotating force receiving portion to the developing roller. | 08-22-2013 |
20130223891 | DEVELOPMENT DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An image forming apparatus is provided which includes a development device that has no developer supply member and with which the decrease in density at a back end of a solid image and occurrence of ghosting are suppressed. A development roller having dielectric portions scattered on a surface thereof is provided and components are configured so that the position of the dielectric portions in a triboelectric series is on the same polarity side, relative to a regulating blade, as the normal charge polarity of the toner. | 08-29-2013 |
20130272753 | DEVELOPING UNIT, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A developing unit for an electrophotographic image forming apparatus includes a developing roller, having a shaft member, for developing an electrostatic latent image formed on an electrophotographic photosensitive drum using a developer; and a bearing for rotatably supporting the shaft member, the bearing including a bearing base portion of a first resin molded material and a bearing portion of a second resin molded material different from the first resin molded material, the bearing portion having a through-hole, wherein the bearing portion includes a contact portion contacting a stepped abutting portion of the shaft member, and a retaining portion overlapping with the bearing base portion in a direction crossing with an axial direction of the shaft member. | 10-17-2013 |
20130302069 | Image Forming Apparatus and Process Cartridge - The image forming apparatus includes a drum cartridge having a photosensitive drum and a drum drive input member; a developing cartridge configured to be movably mounted to the drum cartridge, the developing cartridge comprising a developing roller disposed so as to face the photosensitive drum and a developing drive input member; a drum drive transmission member configured to engage with the drum drive input member and configured to transmit drum driving force to the drum drive input member while permitting a positional gap of the drum drive input member within a predetermined range; and a developing drive transmission member configured to engage with the developing drive input member and configured to transmit developing driving force to the developing drive input member while permitting a positional gap of the developing drive input member within a predetermined range. | 11-14-2013 |
20130322930 | DEVELOPING CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A developing cartridge mountable to a development rotary of an electrophotographic image forming apparatus, a coupling member for transmitting a rotational force from a main assembly engaging portion to a developing roller, the coupling member being engageable and disengageable relative to the engaging portion with rotation of the rotary, the coupling member being movable among a rotational force transmitting angular positio, a pre-engagement angular position in which the coupling member is inclined relative to that in the transmitting angular position to engage with the engaging portion, and a disengaging angular position for disengaging therefrom; and an inclination regulating member movable between a regulating position for positioning the coupling member to the pre-engagement position and a retracted position, the inclination regulating member being movable from the retracted position to the regulating position by being abutted by a function member of the rotary. | 12-05-2013 |
20140199098 | 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. | 07-17-2014 |
20140219690 | DEVELOPER CARTRIDGE - A developer cartridge comprises a cartridge box, a stirring member, a developing roller, a gear set which receives driving force and drives the stirring member and the developing roller; a rotation member which is installed on the exterior wall of the cartridge box and is provided with a clutch gear and a coaxial cam wherein the clutch gear has a small-diameter portion which is clearance-fitted with one gear top of the gear set and a large-diameter portion which is interference-fitted with the gear top and wherein the large-diameter portion is provided with an elastic friction layer along the circumference and the cam is in a staggered phase with the clutch gear; a contact member which is installed on the exterior wall of the cartridge box and has a contact end and a trigger end; and an elastic member which is installed between the cartridge box and the contact member. | 08-07-2014 |
20140294450 | DEVELOPING CARTRIDGE AND PROCESS CARTRIDGE - A developing cartridge includes: a developing roller main body; a developing roller shaft, which is arranged along a central axis line of the developing roller main body, and which protrudes from both end portions of the developing roller main body along the central axis line, wherein the developing roller shaft includes a small diameter part located at a first end portion in the axis line direction, the small diameter part having an outer diameter smaller than an outer diameter of a second end portion opposite to the first end portion; and a developing gear that is fixed to the first end portion of the developing roller shaft. | 10-02-2014 |
20140314452 | INTERVAL GUARANTEE MEMBER, DEVELOPING APPARATUS, PROCESS CARTRIDGE - An interval guarantee member including: a first image bearing member side sliding portion in sliding-contact with the image bearing member; a first developing side sliding portion in sliding-contact with the developer bearing member; a second image bearing member side sliding contact portion in sliding-contact with the image bearing member; and a second developing side sliding contact portion in sliding-contact with the developer bearing member, wherein the distance between the first image bearing member side sliding contact portion and the first developing side sliding contact portion is longer than that between the second image bearing member side sliding contact portion and the second developing side sliding contact portion, and the first image bearing member side sliding contact portion and the first developer side sliding contact portion come into contact with the image bearing member and the developer bearing member. | 10-23-2014 |
20140334852 | IMAGE FORMING APPARATUS - An image forming apparatus is provided. The image forming apparatus includes a photosensitive body unit including a photosensitive body, at least one developing unit including a developing roller that is configured to contact the photosensitive body or to be separated from the photosensitive body, and a press device to press the developing unit in order to contact or separate the photosensitive body and the developing roller to/from each other. The press device includes at least one lever configured to rotate about an end portion thereof and press the developing unit by rotation, and at least one cam configured to allow the lever to rotate by rotation thereof. Since the lever gradually rotates by rotation of the cam, force applied to the developing unit through the lever is also gradually and smoothly increased or decreased. Accordingly, shock, which may occur by rough movement of the developing unit, is remarkably reduced. | 11-13-2014 |
20150016848 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer carrier that has a cylindrical shape and that rotates while carrying developer to supply the developer to an image carrier on which an electrostatic latent image is formed, a container that contains the developer carrier, and a discharge-path forming member that is provided along an outer peripheral surface of the developer carrier, that covers a top portion of a path along which the outer peripheral surface moves, the top portion being located at an uppermost position of the path, and that forms a discharge path, through which air is discharged from inside of the container to outside of the container, between the discharge-path forming member and an inner wall surface of the container, the discharge path having an outlet located closer to the developer carrier than the top portion. | 01-15-2015 |
20150016849 | Developing Cartridge and Process Cartridge For Stably Rotating Developing Roller - A developing cartridge includes: a housing having first and second sidewalls through which respective end portions of a developing roller shaft are rotatably inserted; a developing gear, which is arranged outside of the first sidewall, and which is fixed to the end portion of the developing roller shaft; a transmission gear, which is arranged outside of the first sidewall, and which transmits driving force to the developing gear; a first cover member, which is attached to the first sidewall, and which covers the transmission gear; and a second cover member, which is attached to the first sidewall, and which covers the developing gear from an outer side in the axis line direction. The second cover member is formed separately from the first cover member and is arranged side by side with the first cover member outside of the first sidewall. | 01-15-2015 |
20150016850 | Developing Cartridge and Process Cartridge For Stably Rotating Developing Roller - A developing cartridge includes: a housing having first and second sidewalls through which respective end portions of a developing roller shaft are rotatably inserted; a developing gear, which is arranged outside of the first sidewall, and which is fixed to the end portion of the developing roller shaft; a transmission gear, which is arranged outside of the first sidewall, and which transmits driving force to the developing gear; a first cover member, which is attached to the first sidewall, and which covers the transmission gear; and a second cover member, which is attached to the first sidewall, and which covers the developing gear from an outer side in the axis line direction. The second cover member is formed separately from the first cover member and is arranged side by side with the first cover member outside of the first sidewall. | 01-15-2015 |
20150055987 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING SAME - A developing device includes a developer bearer and a regulation member. The developer bearer bears developer on a surface thereof. The developer bearer is rotatable forward and in reverse. The regulation member is disposed in contact or non-contact with the surface of the developer bearer to regulate amount of the developer on the developer bearer. In a non-development period, when the developer bearer rotates in a direction of reverse rotation opposite to a direction of forward rotation in which the developer bearer rotates in a development period, the developer bearer stops a series of rotating operations after the developer bearer rotates in the direction of forward rotation as a last rotating operation. A total rotation amount of forward rotation is set to be greater than a total rotation amount of reverse rotation in the series of rotating operations. | 02-26-2015 |
20150104222 | Cap Configuration for a Toner Cartridge - Aspects described herein relate to a cap for a toner cartridge. In one example, the cap may be configured to close a toner supply opening of the toner cartridge. According to one or more aspects, the cap may include a sealing or covering portion configured to cover the toner supply opening and a shaft portion for rotatably supporting a to-be-detected rotary member. The to-be-detected rotary member | 04-16-2015 |
20150104223 | Developer Cartridge Having Developing Roller - The developer cartridge includes a developing roller, a supply roller, a gear, a first intermediate gear, a second intermediate gear, a developing roller gear, and a supply roller gear. The supply roller is in contact with the developing roller. The gear is configured to receive a drive force from an outside. The first intermediate gear is provided to a supply roller shaft such that the first intermediate gear is rotatable relative to the supply roller shaft. The developing roller gear is provided to a developing roller shaft such that the developing roller gear is unrotatable relative to the developing roller shaft. The developing roller gear is engaged with the second intermediate gear. The supply roller gear is provided to the supply roller shaft such that the supply roller gear is unrotatable relative to the supply roller shaft. The supply roller gear is engaged with the second intermediate gear. | 04-16-2015 |
20150117910 | Image Forming Apparatus - An image forming apparatus including a transmission mechanism transmitting a driving force in a transmission direction from a driving source to an output unit, the transmission mechanism including a movable gear configured to move between a transmission position where, when the driving source generates the driving force in a first rotational direction, and a clutch is in a rotating state, the movable gear is allowed to rotate without contacting a lock member, and a restriction position where, when the driving source generates the driving force in a second rotational direction, the clutch is in an idling state, the movable gear is restricted from rotating by contact with the lock member. | 04-30-2015 |
20150139701 | Developing Cartridge Provided with Receiving Member Capable of Efficiently Transmitting Drive Force to Developer Carrier - A developing cartridge includes: a casing; a developer carrier; and a receiving member. The casing includes a support portion. The receiving member receives a drive force from an external drive source to transmit the drive force to the developer carrier. The receiving member has a cylindrical configuration. The support portion rotatably supports the receiving member. The receiving member includes: a receiving portion; a transmission portion; and a fitting portion. The receiving portion has an outer edge in a radial direction of the receiving member. The transmission portion defines an outer circumferential edge of the receiving member. The fitting portion is positioned inward of the transmission portion in the radial direction and fitted with the support portion. The outer edge of the receiving portion is positioned inward of the transmission portion in the radial direction and outward of the fitting portion in the radial direction. | 05-21-2015 |
20150293469 | Roll Having Textured Axial Ends to Prevent Toner Leakage - A roll for use in an electrophotographic image forming device according to one example embodiment includes a shaft defining an axis of rotation of the roll. The roll includes an outer circumferential surface having a pair of axial ends. Recessed grooves and/or raised ribs are present in the outer circumferential surface near the axial ends. The recessed grooves and/or raised ribs are angled relative to the axis of rotation of the roll away from a direction of rotation of the roll from the axial ends inward or parallel to the axis of rotation of the roll to direct toner away from the axial ends. | 10-15-2015 |
20150293477 | DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - A developing device supplies a developer to a photosensitive drum, which has a cylindrical shape, and is rotatable around an axis thereof for forming an electrostatic latent image on the circumferential surface thereof. The developing device is provided with a developing roller. The developing roller is disposed to face the photosensitive drum, and has a cylindrical shape. The developing roller is rotatable around an axis thereof for carrying a developer on the circumferential surface thereof. The developing roller is provided with a small diameter portion. The small diameter portion is a part of the circumferential surface of the developing roller. The small diameter portion extends from an axial end of the developing roller axially inward by a predetermined length, and has an outer diameter smaller than an axially middle portion of the developing roller. | 10-15-2015 |
20150331354 | IMAGE FORMING APPARATUS - A photosensitive drum is axially rotatable and has a surface on which an electrostatic latent image is formed. A developing device includes a development roller spaced from the photosensitive drum. The development roller includes a cylindrical sleeve and a coating layer, and the photosensitive drum includes a cylindrical tube and a functional layer. Each of the coating layer and functional layer is formed by dipping the sleeve or tube into a dipping bath with the sleeve or tube directed axially vertically. An axial end portion of the development roller that is lower during the dipping process is disposed opposite to an axial end portion of the photosensitive drum that is higher during the dipping process, and an axial end portion of the development roller that is higher during the dipping process is disposed opposite to an axial end portion of the photosensitive drum that is lower during the dipping process. | 11-19-2015 |
20150362859 | DEVELOPING CARTRIDGE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A developing cartridge includes a developing roller | 12-17-2015 |
20160048092 | Image Forming Apparatus and Process Cartridge - The image forming apparatus includes a drum cartridge having a photosensitive drum and a drum drive input member; a developing cartridge configured to be movably mounted to the drum cartridge, the developing cartridge comprising a developing roller disposed so as to face the photosensitive drum and a developing drive input member; a drum drive transmission member configured to engage with the drum drive input member and configured to transmit drum driving force to the drum drive input member while permitting a positional gap of the drum drive input member within a predetermined range; and a developing drive transmission member configured to engage with the developing drive input member and configured to transmit developing driving force to the developing drive input member while permitting a positional gap of the developing drive input member within a predetermined range. | 02-18-2016 |
20160077465 | Developer Cartridge - A developer cartridge is described. The developer cartridge detachably mountable on a tandem type photosensitive unit slidable to a drawn-out position and a mounted position with respect to an image forming apparatus body may include a casing; a developer carrier rotatably supported on one end portion of the casing for carrying a developer; a pair of upright portions arranged on another end portion of the casing at an interval from each other in the axial direction of the developer carrier to extend from another end portion of the casing in a detaching direction for the developer cartridge; and an elastically deformable coupling portion extending in the axial direction of the developer carrier for coupling the upright portions with each other. | 03-17-2016 |
20160187808 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - An electrophotographic image forming apparatus has a developing roller, wherein a glossiness of a surface of the developing roller is in a range of about 4 to about 15, the developing roller includes a plurality of protruding beads, a number average distance (Rsm) between the protruding beads is in a range of about 200 μm to about 400 μm, a supplying roller includes a plurality of foam cells, a number average size of the foam cells is in a range of about 300 μm to about 500 μm, and the developing roller is arranged to rotate at a rotation linear velocity that is about 120% to about 150% of a rotation linear velocity of a photoreceptor. | 06-30-2016 |
20160378018 | IMAGE FORMING APPARATUS - An image forming apparatus includes a body, a photoreceptor unit, and a developing unit. The developing unit includes a first attaching/detaching lever that moves a developing sleeve from a first position to a second position by lifting the first attaching/detaching lever. The photoreceptor unit includes a second attaching/detaching lever that moves the developing sleeve from the first position to the second position by lifting the second attaching/detaching lever. The photoreceptor unit and the developing unit move the developing sleeve to the second position by lifting the first or second attaching/detaching lever so that the photoreceptor unit and the developing unit are individually detached from the body. | 12-29-2016 |