Entries |
Document | Title | Date |
20080205943 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device is provided having a simple configuration by which a desired amount of developer can be delivered to an image bearing member, and there is provided an image forming apparatus having the developing device. A developing device includes a developing roller by which two-component developer is borne and delivered to a photoreceptor drum, a layer thickness-regulating member for regulating a layer thickness of the developer, and a magnetism-generating member for generating magnetism, and a control unit for controlling an amount of displacement of the magnetism-generating member. The control unit | 08-28-2008 |
20080213008 | Developing Device and Image Forming Apparatus - A developing device and image forming apparatus are provided. The developing device includes a chassis; a developer carrying member; a thickness regulating member; a supply member; and a conveying member. In a state in which the developing device is attached to a main body an opening of the chassis faces upward; the thickness regulating member pressure-contacts the developer carrying member from below the developer carrying member; the conveying member is disposed below the developer carrying member; the supply member overlaps a portion of the conveying member in a horizontal direction; and a portion of the conveying member is disposed within a vertical projection plane between a pressure-contact position of the thickness regulating member to the developer carrying member, and a contact position of the supply member to the developer carrying member. The image forming apparatus includes a main body; a plurality of photosensitive members; and a plurality of developing devices. | 09-04-2008 |
20080298855 | Developing Device, Image Forming Apparatus, and Image Forming System - A developing device includes a rotatable toner bearing roller and a regulation blade. The toner bearing roller has regularly-arranged projecting sections and non-projecting sections, bears toner whose volume average particle diameter is smaller than a depth of the non-projecting section relative to the projecting section, and develops a latent image borne on an image bearing member with the toner borne on the toner bearing roller. The regulation blade is for regulating an amount of the toner borne on the toner bearing roller, and abuts, with a predetermined width, against a circumferential surface of the toner bearing roller in a circumferential direction thereof in such a manner that a longitudinal direction of the regulation blade is along a direction of a rotation axis of the toner bearing roller. A tip edge of the regulation blade in a lateral direction and a thickness direction thereof is located within an abutting section having the predetermined width. The predetermined width is larger than a maximum width, in the circumferential direction, of the non-projecting section. | 12-04-2008 |
20080310888 | DEVELOPING UNIT AND IMAGE FORMING APPARATUS EMPLOYING THE SAME - A developing unit is provided that includes a housing to store toner, a developing member disposed proximate to the housing to rotate around a first rotation axis, and opposite to the photosensitive medium, and a cylindrical regulating member to rotate about a second rotation axis and to regulate the toner supplied to the developing member to form a uniform toner layer on the developing member, wherein the first and second rotation axes form a predetermined offset angle θ with each other. The angle satisfies the following formula: 0.25°≦θ≦0.71°. The regulating member is arranged so that a center of each end portion of the regulating member which contacts the developing member is offset with respect to the first rotation axis of the developing member by an eccentric distance M, which satisfies the following formula: 0.5 mm≦M≦1.3 mm. | 12-18-2008 |
20090003890 | DEVELOPING UNIT AND AN IMAGE FORMING APPARATUS HAVING THE SAME - A developing unit which has an improved structure to limit pressure between a developing member and a regulation roller to a regular range, and an image forming apparatus having the same are provided. A developing unit includes a developing member to develop an electrostatic latent image on a photoconductive medium using a developer, a regulation unit to press toward the developing member to regulate a layer of the developer supplied on the developing member, and a limit unit to limit pressure between the developing member and the regulation unit. | 01-01-2009 |
20090003891 | IMAGE FORMING APPARATUS - An image forming apparatus uses a two-component developer containing a toner and a carrier. The apparatus has a latent image bearer for bearing an electrostatic latent image. A toner bearer bears the toner to be conveyed to a development region to develop the electrostatic latent image. A developer bearer bears the two-component developer and supplies the toner to the toner bearer. A regulator sets the thickness of a toner layer carried on the toner bearer to 6 μm to 15 μm and sets a difference between a half width of a first toner charge number distribution as a number distribution of the charge amount of the toner carried on the toner bearer and that of a second toner charge number distribution as a number distribution of the charge amount of the toner in the two-component developer carried on the developer bearer to 0.8 (10 | 01-01-2009 |
20090003892 | IMAGE FORMING APPARATUS - An image forming apparatus is provided, which controls an appropriate developer amount for a desired image so that an image defect such as an unclear font or a white area is prevented, resulting in a stable image formation for a long term. A developer regulating member has a resistance value varying depending on a voltage to be applied. A control device changes over the voltage to be applied to the developer regulating member during the image formation according to image information and changes a potential difference between the developer carrying member and the developer regulating member. | 01-01-2009 |
20090041511 | SINGLE COMPONENT DEVELOPMENT DEVICE, PROCESS CARTRIDGE AND TONER - A single component development device including a toner including a resin, a coloring agent, a wax, a charge control agent and an inorganic particulate, a development roller to bear the toner on the surface of the development roller and transfer the toner to an image bearing member and a thin layer forming member to regulate a thickness of the layer of the toner while in contact with the surface of the development roller via the toner borne thereon, wherein a regulating pressure A between the thin layer forming member and the development roller is from 25 to 60 (N/m), a content Z (weight %) of the charge control agent satisfies the following relationship (1) and an average dispersion particle diameter D (nm) of the charge control agent satisfies the following relationship (2): | 02-12-2009 |
20090052952 | IMAGE FORMING APPARATUS, PROCESS CARTRIDGE AND TONER - An image forming apparatus including an image bearing member including a tube, the image bearing member to bear a latent electrostatic image, a development device including a pulverized toner including a resin, a coloring agent and a releasing agent component, the development device to develop the latent electrostatic image with the toner to form a visualized image on the image bearing member, a transfer device to transfer the visualized image to a recording medium, a fixing device including a fixing member, the fixing device to fix the visualized image on the recording medium and an elastic blade to remove the toner on the surface of the image bearing member, wherein the toner has a void ratio of from 52 to 58% and a toner torque of from 1.0 to 2.5 mNm according to a torque measuring method using a circular conical rotor and the following relationships (1) to (4) are satisfied: | 02-26-2009 |
20090060594 | DEVELOPING DEVICE - A developing device includes a toner container, a developer carrier, end-portion sealing parts, and a regulating member. The toner container is disposed to be adjacent to the image carrier, and has an opening. The developer carrier is rotatably supported by the toner container so that a part of the developer carrier is exposed to the outside from the opening, and provides the image carrier with toner. The end-portion sealing parts are disposed in the axial end portions of the opening, and prevent toner leaking from the toner container. The regulating member regulates the amount of toner on the developer carrier while the tip side contacts the surface of the developer carrier, and tip edges of axial end portions of the regulating member contact the surface of the developer carrier while the axial end portions are pressed to the surface of the developer carrier by the end-portion sealing parts. | 03-05-2009 |
20090110442 | Developer Apparatus, Image Forming Apparatus and Developing Method - A developer apparatus, includes: a container which houses toner; a toner carrier roller which is provided, on a surface thereof, with a plurality of convex sections which are regularly arranged and a concave section which surrounds the convex sections, is shaped approximately like a cylinder, and rotates while carrying a toner layer of charged toner supplied from the container on the surface thereof; and a restriction member which abuts on the toner layer on the surface of the toner carrier roller to restrict a thickness of the toner layer, and restricts the toner layer carried by the convex sections within the surface of the toner carrier roller to one layer or less. | 04-30-2009 |
20090110443 | Developer Apparatus, Image Forming Apparatus and Developing Method - A developer apparatus, includes: a container which houses toner; a toner carrier roller that is provided, on a surface thereof, with a plurality of convex sections which are regularly arranged and a concave section which surrounds the convex sections, is shaped approximately like a cylinder, and rotates while carrying a toner layer of charged toner supplied from the container on the surface thereof, and a restriction member that abuts on the surface of the toner carrier roller to form a restriction nip, restricts a thickness of the toner layer carried on the surface of the toner carrier roller in the restriction nip, and removes the toner layer on the convex sections from among the toner layer carried on the surface of the toner carrier roller at an upstream-side end of the restriction nip in a rotation direction of the toner carrier roller. | 04-30-2009 |
20090110444 | Developer Apparatus, Image Forming Apparatus and Image Forming Method - A developer apparatus, includes: a toner carrier roller which rotates while carrying a toner layer of charged toner on its surface, the toner carrier being shaped approximately like a cylinder and being provided, on a surface thereof, with a plurality of convex sections, which are regularly arranged along a width direction parallel to a rotation shaft of the toner carrier roller and a circumferential direction which is along a circumferential surface of the toner carrier roller, and concave sections which surround the convex sections; and a restriction member which abuts on the surface of the toner carrier roller, thereby restricting the toner layers which are carried on the surface of the toner carrier roller, the restriction member including an elastic abutting member formed by an elastic material, the elastic abutting member which includes an edge part which extends along the width direction parallel to the rotation shaft of the toner carrier roller and abuts on the surface of the toner carrier roller, wherein within a restriction nip which is created as the toner carrier roller and the restriction member abut on each other, a plurality of abutting segments where the edge part abuts on the plurality of convex sections and opening segments where the edge part and the concave sections are opposed each other with a gap between each other appear alternately along the width direction, and in the opening segments, the edge part of the elastic abutting member bulges toward bottom of the concave sections beyond linear lines which connect top surfaces of two adjacent convex sections which are on both sides to the concave sections which are opposed to the edge part. | 04-30-2009 |
20090110445 | Developer Apparatus, Image Forming Apparatus and Developing Method - A developer apparatus, includes: a container which houses toner; a toner carrier roller that is provided, on a surface thereof, with a plurality of convex sections which are regularly arranged and a concave section which surrounds the convex sections, is shaped approximately like a cylinder, and rotates while carrying a toner layer of charged toner on the surface thereof; and a restriction member that abuts on the surface of the toner carrier roller to form a restriction nip, restricts a thickness of the toner layer carried on the surface of the toner carrier roller in the restriction nip, and removes the toner layer on the convex sections from among the toner layer carried on the surface of the toner carrier roller at an upstream-side end of the restriction nip in a rotation direction of the toner carrier roller, wherein a part of toner carried by the concave section moves to the convex sections to cover the convex sections with the toner at a downstream side to the restriction nip in the rotation direction of the toner carrier roller. | 04-30-2009 |
20090110446 | Development device and image forming apparatus having same - A development device | 04-30-2009 |
20090142108 | Assembly for Achieving Uniform Doctor Blade Force - A doctor blade assembly for an electrophotographic printer comprises a first bracket having a first width dimension and a first height dimension, a second bracket having a second width dimension and a second height dimension, a doctor blade disposed between the front bracket and the rear bracket, the doctor blade having a cantilever length, the cantilever length varying from a first length at a first location and a second length at a second location moving along said width dimensions. | 06-04-2009 |
20090148197 | Developer Apparatus, An Image Forming Apparatus and An Image Forming Method - A developer apparatus, includes: a toner carrier roller that is shaped approximately like a cylinder, rotates while carrying a toner layer of charged toner on a surface thereof, and is provided, on the surface thereof, with plural convex section rows, each of which has plural convex sections arranged in a row in a width direction parallel to a rotational axis of the toner carrier roller and which are arranged in a circumferential direction orthogonal to the width direction and parallel to a circumferential surface of the toner carrier roller, the convex sections being so constructed and arranged that top surfaces of the convex sections coincide with a part of a curved surface of a single cylinder; and a restriction member that abuts on the surface of the toner carrier roller to restrict the toner layer carried on the surface of the toner carrier roller, includes an elastic abutting member which is made of an elastic material and has an edge part which extends in the width direction, the edge part being pressed into contact with the surface of the toner carrier roller, wherein a virtual surface which is obtained by extending the top surface of each convex section in the width direction and forms a part of the curved surface of the single cylinder is defined as a convex section extending surface of each convex section, and the convex section extending surfaces overlap each other between the convex sections belonging to the same convex section row, whereas the convex section extending surfaces do not overlap each other between the convex sections belonging to mutually different convex section rows. | 06-11-2009 |
20090169272 | Developing Device and Blade Assembly - A developing device includes: a developing roller, a casing which rotatably supports the developing roller; a thickness regulation blade; and first and second holding members which fix the thickness regulation blade on the casing. The first holding member includes: a first nipping surface which contacts the thickness regulation blade; and a first fixing surface. The second holding member includes: a second nipping surface which opposes the first nipping surface; and a second fixing surface contacting the first fixing surface. The thickness regulation blade includes a positioning opening and is sandwiched between the first nipping surface and the second nipping surface. The first nipping surface includes a projection which is fitted into the positioning opening of the thickness regulation blade. | 07-02-2009 |
20090169273 | Doctor Blade Surface Energy Modification - The present disclosure relates to a surface energy reduction material in the form of a topcoat or additive to a coating that may be applied to a toner regulating member such as a doctor blade which may reduce toner build-up about a nip region, pre-nip region, and/or post-nip region. The surface energy reduction material may be include any material having a surface energy of less than or equal to 35 dynes/cm, for example, between 15-30 dynes/cm, including all values and ranges therein. The surface energy reducing materials may include any material that provides a 25% or more reduction of the surface energy of the doctor blade compared to an untreated doctor blade, for example, greater than or equal to 50% reduction or greater than or equal to 75% reduction, including all values and ranges therein. | 07-02-2009 |
20090185836 | Developer, developer storage unit, developing device, and image forming apparatus - Developer includes toner formed of base particles containing at least a binder resin. The base particles have surfaces coated with an additive agent, and the toner has a volume average particle size between 3.9 μm and 6.1 μm. The developer further includes agglomerates in an amount between 0.01 wt % and 0.10 wt %. The agglomerates have a volume average particle size between 75 μm and 100 μm. | 07-23-2009 |
20090214271 | Development Roller, Development Device, Image Forming Apparatus, and Method of Manufacturing Development Roller - 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, and a surface layer formed on the circumference surface of the base unit and having on the circumference thereof a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. Surface hardness of the projection is higher than surface hardness of the recess. | 08-27-2009 |
20090245890 | IMAGE FORMING APPARATUS AND DEVELOPER THEREOF - An image forming apparatus and a developer thereof includes a developer frame to store a developing agent, a developing device rotatably mounted to the developer frame, a support member mounted to the developer frame, and a regulating member having a first end fixed to the support member, and a second end opposite to the first end, the second end installed in a trail-type manner. The support member includes a plurality of bending portions bent to reinforce a strength of the support member. A trail-type regulating device improved to maintain a sufficient strength and a sufficient elasticity is also disclosed. The regulating device allows the developing agent layer attached to the developing device can be uniform. | 10-01-2009 |
20090317144 | Image forming unit and image forming apparatus - An image forming unit includes a developer bearing body that supplies a developer to an image bearing body that bears a latent image, and a developer layer forming member that forms a layer of the developer on the developer bearing body. The developer has a mean volume diameter in a range from 3.0 to 5.0 μm, and a bulk density in a range from 0.26 to 0.32 g/cm | 12-24-2009 |
20090317145 | IMAGE FORMING APPARATUS - An image forming apparatus includes a pair of regulating members, for regulating movement of a recording material conveyed from a secondary transfer portion toward an intermediary transfer belt side, configured to be contactable to the recording material at both end portions with respect to a width direction perpendicular to a conveyance direction of the recording material; a moving mechanism capable of moving a position of the pair of regulating members with respect to the width direction; a recording material size detecting portion for obtaining width information of the recording material with respect to the width direction perpendicular to the conveyance direction; and a width control portion for controlling the moving mechanism so that the pair of regulating members to a position correspondingly to the width information obtained by the recording material size detecting portion. | 12-24-2009 |
20100003058 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developer carrier is provided in a rotatable manner. A layer-thickness control member makes a layer thickness of a developer carried on the developer carrier uniform. An accelerated agglomeration degree of the developer is equal to or less than 40%. The layer-thickness control member is formed with a blade. An angle between a rolling direction of the blade and a rotating direction of the developer carrier is set to 5 degrees to 80 degrees. | 01-07-2010 |
20100028057 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing device develops an electrostatic latent image formed on an image carrier with toner. The developing device includes a developer carrier, a developer supplying unit that supplies a developer on the developer carrier, a layer shaping member that shapes the developer supplied on the developer carrier into a thin layer, and an electric-field control member that is arranged downstream of a shaping nip formed between the developer carrier and the layer shaping member and that controls an intensity of an electric field generated between the developer carrier and the layer shaping member. | 02-04-2010 |
20100135701 | DEVELOPING UNIT OF IMAGE FORMING APPARATUS - A developing unit provided in an image forming apparatus includes a regulating member that improves developer layer regulation performance. The developing unit is configured to feed developer to a photoconductor, on which an electrostatic latent image is formed, to form an image. The regulating member of the developing unit includes a bending portion contacting an outer peripheral surface of a developing device provided in a frame of the developing unit. The width of the regulating member is variable to increase rearward from the bending portion. The regulating member may further include an extension portion extending from the bending portion. Sealing members may be attached to both ends of the frame of the developing unit so as to contact the respective ends of the bending portion. | 06-03-2010 |
20100150617 | DEVELOPING ROLLER MANUFACTURING METHOD, DEVELOPING ROLLER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A method of manufacturing a developing roller, including: a first rolling process for forming a first inclined groove which is continuous in a helical shape, by rotating a first die having blades inclined with respect to an axial direction and a circumferential direction, and a non-bladed die, and feeding an unprocessed developing roller between the first die and the non-bladed die; and a second rolling process for forming a second inclined groove which is continuous in a helical shape and intersects with the first inclined groove, by rotating a second die having blades inclined with respect to an axial direction and a circumferential direction in the direction opposite to that of the first die, and the non-bladed die in the same direction opposite to that in the first rolling process, and feeding the developing roller between the second die and the non-bladed die. | 06-17-2010 |
20100158580 | METERING SKIVE FOR A DEVELOPER ROLLER - A metering skive for a developer roller which is adapted to shear and/or meter developer at a developer-skive interface while minimizing compression of the metered developer. The metering skive is adjustable to various shear angles and has a geometry which enables a portion of the developer flow to be sheared away toward a curved second surface of the metering skive while metering the developer flow in a manner which minimizes or reduces compression of the developer. | 06-24-2010 |
20100158581 | Developing Device - The developing device includes a developing roller, a layer thickness regulating blade, a first supporting member, a second supporting member, and a securing member. The developing roller has a surface on which a developing agent is deposited. The layer thickness regulates blade that slidingly contacts the surface of the developing roller to regulate a thickness of the developing agent thereon. The first supporting member has a first pinching part and a first securing part oriented in different directions to have a first angle formed therebetween. The second supporting member having a second pinching part and a second securing part oriented in different directions to have a second angle formed therebetween, the second pinching part being urged against the first pinching part. The securing member secures the first securing part and the second securing part while pinching the layer thickness regulating blade between the first pinching part and the second pinching part. | 06-24-2010 |
20100166467 | DEVELOPING BLADE AND ITS MANUFACTURING METHOD - A developing blade ( | 07-01-2010 |
20100189472 | Developing Device and Image Forming Apparatus - A developing device include: a case; a developing roller supported by the case to be rotatable in a rotational direction; and a blade including a base end supported by the case and a tip end provided upstream of the base end in the rotational direction and contacting the surface of the developing roller at a contact portion to regulate a thickness of the toner on the developing roller. The blade further includes a bent portion that is bent from the contact portion at a radius of curvature from 0.2 mm to 0.4 mm to be separated from the developing roller as extending toward the tip end. An angle defined between a segment connecting the contact portion with a center of curvature of the bent portion and a segment connecting the tip end with the center of curvature of the bent portion is in the range from 45° to 90°. | 07-29-2010 |
20100202806 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member; a developer carrying member, contactable to the image bearing member, for carrying a developer to a developing position to develop an electrostatic image formed on the image bearing member with the developer; a supplying member for supplying the developer to the developer carrying member, wherein a peripheral speed of the developer carrying member is not less than 1.05 times and not more than 1.20 times a peripheral speed of the image bearing member, and an arithmetic average roughness Ra is not less than 0.20 times and not more than 0.33 times a volume average particle size of the developer, wherein a potential applied to the supplying member is different from a potential applied to the developer carrying member toward a larger potential of a regular charge polarity of the developer. | 08-12-2010 |
20100215410 | Developer regulating member, developing device, image forming apparatus and manufacturing method of developer regulating member - A developer regulating member regulates a thickness of a layer of a developer on a surface of a developer bearing body. The developer has a degree of circularity in a range from 0.94 to 0.97. The developer regulating member includes a resilient plate member composed of a metal material and having a bent portion. An outer surface of the bent portion contacts the surface of the developer bearing body so that a ridge line of the outer surface of the bent portion crosses a moving direction of the surface of the developer bearing body. A curvature radius R (μm) of the outer surface of the bent portion and a mean crystal grain diameter D (μm) of the metal material satisfy the relationship: | 08-26-2010 |
20100239326 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A developing device, an image forming apparatus and an image forming method are disclosed. The developing device includes a housing that stores toner therein; a toner carrying roller that has a plurality of convex portions and concave portions surrounding the convex portions are formed on the surface of the toner carrying roller; and a conductive regulation blade having a free end comes in contact with the surface of the toner carrying roller. The toner includes a conductive external additive as an external additive. The toner carrying roller carries both contact toner which is in direct contact with the surface of the toner carrying roller and non-contact toner which is not in direct contact with the surface of the toner carrying roller, on the concave portion. The regulation blade is applied with a regulation bias voltage of the same polarity as a normal charge polarity of the toner. | 09-23-2010 |
20100239327 | DEVELOPING DEVICE, IMAGE FORMING DEVICE AND IMAGE FORMING METHOD - A development device includes a housing having toner housed therein; a toner carrying roller that has a plurality of convex portions and concave portions surrounding the convex portions, formed on a surface thereof; and a conductive restriction blade in which a free end or an adjoining region adjacent to the free end abuts the surface of the toner carrying roller, thereby restricting the amount of the toner carried on surface of the toner carrying roller, wherein the toner has an external additive including a metal oxide, the restriction blade is applied with a restriction bias voltage of the same polarity as the regular electrification polarity of the toner, and a gap between the front end of the free end and the convex portion of the toner carrying roller is smaller than a volume average particle diameter of the toner. | 09-23-2010 |
20110026978 | DEVELOPING APPARATUS - An amount-of-developer regulating apparatus configured to restrict the amount of developer carried on a developer bearing member. The amount-of-developer regulating apparatus includes a flexible developer amount regulation member having a contact portion configured to contact with a developer bearing member, and first and second holding portions configured to hold the developer amount regulation member and to contact with the developer amount regulation member at further upstream and further downstream in a direction where the developer bearing member is rotationally moved than the contact portion. With a pressure distribution of the contact portion as to the developer bearing member, there are a plurality of local maximum values in the direction where the developer bearing member is rotationally moved. Thus, the apparatus can be reduced in size, and also image concentration unevenness after long-term use can be prevented. | 02-03-2011 |
20110158707 | RESTRICTING BLADE AND DEVELOPING DEVICE - A restricting blade includes: a metallic plate subjected to punching; a contact surface perpendicular to a thickness direction of the metallic plate, the surface being positioned upstream in a punch direction; an end surface of the metallic plate, formed by the punching, the surface being positioned at the metallic plate upstream in a rotational direction of the developing roller; and a coating layer formed in such a manner as to cover a part of a surface positioned opposite to the contact surface in the thickness direction of the metallic plate and the end surface with a resin or an elastomer. | 06-30-2011 |
20110158708 | DEVELOPING DEVICE - A developing device is provided. The developing device includes a housing, a developer carrier which is rotatably supported by the housing, and a layer thickness regulating member which includes a blade configured to contact the developer carrier along a rotational axial direction of the developer carrier, a support member supporting the blade, and a reinforcement member provided at an opposite side to the support member with respect to the blade and reinforcing the blade. The support member includes a first part which contacts the blade, and to which the blade is fixed, a second part which is connected to the reinforcement member, and a third part which is attached to the housing. As viewed from the rotational axial direction, the first part and the third part are provided on a same first plane, and the second part is provided on a second plane intersecting with the first plane. | 06-30-2011 |
20110158709 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device and an image forming apparatus including the developing device are provided. The developing device includes a housing, a developer carrier which is rotatably supported by the housing, and which carries developer on a circumferential surface thereof, a layer thickness regulating member which includes, a blade contacting the circumferential surface of the developer carrier along a rotational axial direction of the developer carrier, and a support member supporting the blade, the layer thickness regulating member for regulating a layer thickness of the developer on the circumferential surface of the developer carrier. The support member includes: a contact part which contacts the blade; and a pair of attachment parts which are attached to the housing. The attachment parts are provide at both sides of the contact part in the rotational axial direction and are further protruded than the contact part in a direction away from the developer carrier. | 06-30-2011 |
20110158710 | DEVELOPING DEVICE - A developing device includes: a housing made of resin; a developer carrier, which is rotatably supported by the housing, and which is configured to carry developer on a circumferential surface thereof; a receiving-side coupling member, which is provided rotatably to one of end portions of the developer carrier and is configured to couple with a driving-side coupling member in the rotational axial direction to transmit driving force to the developer carrier; a blade, which is provided along the rotational axial direction, and which configured to contact the circumferential surface of the developer carrier to regulate a layer thickness of the developer on the circumferential surface; and a support member, which is bent into an L-shape as viewed from the rotational axial direction, and which supports the blade, wherein the receiving-side coupling member is overlapped with a bending portion of the support member, as viewed from the rotational axial direction. | 06-30-2011 |
20110211870 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device is provided. A developing device bears a developer stored in a developer tank on a developing roller and conveys the developer to a photoreceptor drum to develop an electrostatic latent image. A doctor blade is provided to come into pressure-contact with the developing roller, and regulates layer thickness of the developer borne on the developing roller. The doctor blade has an elastic rubber section and a support section. The support section has a fixation section that is formed into a plate shape in parallel to the axis of the developing roller and is fixed to the developer tank, and an insertion section that continues from the fixation section and is inserted into the elastic rubber section. The insertion section has an proximity curved section that is curved in a direction in proximity to the developing roller. | 09-01-2011 |
20120045254 | DEVELOPER REGULATOR, DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS INCORPORATING SAME - A developer regulator to restrict an amount of a developer, including a base portion; an intermediate portion continuous with the base portion, the intermediate portion having a flat area on one face, the flat area having a roughened surface; and a distal end continuous with the intermediate portion, the distal end being bent relative to the base portion in a direction opposite the one face in which the flat area is formed. | 02-23-2012 |
20120045255 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - Provided is a developing device employing single-component development in which in an upstream side of a most proximate area of a developing roller and a blade for regulating a toner layer, toner aggregation is made difficult to occur between the developing roller and the blade, and uniformity of the toner layer on the developing roller is increased, so as to be able to perform development which does not apply heavy stress and is excellent in uniformity. In the developing device, the blade is divided into two areas of a downstream area in a rotational direction of the developing roller including the most proximate part to the developing roller and an upstream area in a rotational direction of the developing roller not including the most proximate part, and adhesion between a toner and the blade in the upstream area is made smaller than that in the downstream area. | 02-23-2012 |
20120099906 | DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS - A development device includes: a development roller that includes a cylindrical member and a shaft, which cylindrical member has a hollow portion through which the shaft is inserted, and is rotated around an axis, holding a developer containing a toner on a surface of the cylindrical member to supply the toner to an image holder; a rod-shaped regulation member that is disposed approximately in parallel with the development roller, and regulates a thickness of the toner held on the surface of the cylindrical member; a first supporting member that supports an end of the shaft of the development roller and an end of the regulation member; and a second supporting member that supports another end of the shaft of the development roller and another end of the regulation member. | 04-26-2012 |
20120114394 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer transport body that transports developer to develop an electrostatic latent image on an image carrier, a housing that holds the developer transport body and defines an exposed portion and an unexposed portion, the housing including a storage portion storing the developer, and a layer-thickness regulation member that regulates a layer thickness of the developer transported to the exposed portion and includes one side close to a surface of the developer transport body, a first portion, and a second portion. The housing includes first faces that define both ends of the storage portion in the rotation axis direction of the developer transport body, a second face, and a third face. The developing device further includes a closing member that closes a gap between the layer-thickness regulation member and the second and third faces, and a magnet provided between the second and third faces. | 05-10-2012 |
20120237270 | DEVELOPING ROLLER - A developing roller including: an electrically-conductive base; an elastic layer formed on an outer circumference of the electrically-conductive base; and a toner bearing layer formed on the elastic layer, wherein the toner bearing layer contains a polyurethane resin having an isocyanurate structure, and wherein the polyurethane resin has a ratio A/B of 1.0 to 10.0 where A denotes absorbance attributed to C═O of cyanurate and B denotes absorbance attributed to C═O of urethane in an infrared absorption spectrum of the polyurethane resin obtained by an ATR method. | 09-20-2012 |
20120251190 | DEVELOPING CARTRIDGE - Developing cartridge includes doctor blade in contact with developer carrying member. The doctor blade includes supporting plate having proximal end portion and distal end portion. Pressing portion is provided on the distal end portion to define contacting portion at which the doctor blade contacts surface of the developer carrying member. The pressing portion has end face extending in a direction away from the developer carrying member from the contacting portion and facing an upstream side in rotational direction of the developer carrying member. The proximal end portion is positioned downstream from the contacting portion in the rotational direction of the developer carrying member. Angle a between the end face and a plane tangent to the contacting portion, at a position in proximity to the developer carrying member, is not smaller than 90 degrees, as viewed in cross section orthogonal to axis of rotation of the developer carrying member. | 10-04-2012 |
20120301189 | REGULATING MEMBER, DEVELOPING DEVICE AND PROCESS CARTRIDGE - A regulating member for regulating a developer amount carried on a developer carrying member includes a plate-like supporting member having an elasticity, the supporting member being provided with a fixed portion for being fixed to a fixed part; a first contact portion contactable to the developer carrying member, the first contact portion protruding from the regulating member from a side of the supporting member; and a second contact portion contactable to and the developer carrying member, the second contact portion being at a position closer to the fixed portion than the first contact portion. | 11-29-2012 |
20130004210 | Developing Device and Image Forming Apparatus - A developing device and image forming apparatus are provided. The developing device includes a chassis; a developer carrying member; a thickness regulating member; a supply member; and a conveying member. In a state in which the developing device is attached to a main body an opening of the chassis faces upward; the thickness regulating member pressure-contacts the developer carrying member from below the developer carrying member; the conveying member is disposed below the developer carrying member; the supply member overlaps a portion of the conveying member in a horizontal direction; and a portion of the conveying member is disposed within a vertical projection plane between a pressure-contact position of the thickness regulating member to the developer carrying member, and a contact position of the supply member to the developer carrying member. The image forming apparatus includes a main body; a plurality of photosensitive members; and a plurality of developing devices. | 01-03-2013 |
20130011168 | DEVELOPING UNIT OF IMAGE FORMING APPARATUS - A developing unit provided in an image forming apparatus includes a regulating member that improves developer layer regulation performance. The developing unit is configured to feed developer to a photoconductor, on which an electrostatic latent image is formed, to form an image. The regulating member of the developing unit includes a bending portion contacting an outer peripheral surface of a developing device provided in a frame of the developing unit. The width of the regulating member is variable to increase rearward from the bending portion. The regulating member may further include an extension portion extending from the bending portion. Sealing members may be attached to both ends of the frame of the developing unit so as to contact the respective ends of the bending portion. | 01-10-2013 |
20130028640 | DEVELOPING APPARATUS HAVING THICKNESS REGULATING MEMBER - A developing apparatus includes a housing, a developing roller, a supply roller, and a thickness regulating member. The housing is configured to accommodate developer that includes developer particles having a mean volume diameter. The developing roller is rotatably supported in the housing and has a peripheral surface configured to carry the developer. The supply roller is rotatably supported in the housing, contacts the developing roller, and configured to supply the toner to the developing roller. The thickness regulating member includes a contact member contacting the peripheral surface. The contact member is configured to regulate a thickness of the developer on the peripheral surface such that an average of the thickness of the developer on the peripheral surface becomes smaller than or equal to the mean volume diameter. | 01-31-2013 |
20130051868 | Development Device - A development device includes a first frame and a second frame. The second frame is configured to be combined with the first frame by fixing first, second and third walls of the first frame to the second frame. The first and second walls are disposed opposite to each other, and the third wall is configured to connect the first and second walls. An opening is formed by the combined first and second frames. The first frame includes first and second engageable portions, and the second frame includes third and fourth engageable portions, such that engagement of the first and second engageable portions with the third and fourth engageable portions brings the first and second frames into alignment. The first and second engageable portions are disposed between the first wall and the second wall. | 02-28-2013 |
20130058684 | Developing Device Provided with Thickness-Regulating Member - A developing device includes: a first frame; a second frame; a developer-carrying member; and a thickness-regulating member. The first frame includes: a pair of first walls opposed with each other; and a second wall connecting the pair of first walls and having a first fixing part. The second frame includes a third wall opposed to the second wall and attached to the pair of first walls when assembled to the first frame. The developer-carrying member has an axis extending in a first direction, is configured to rotate about the axis, and is disposed between the pair of first walls. The thickness-regulating member is fixed to the first fixing part and is configured to regulate a thickness of developer carried on the developer-carrying member. The third wall is disposed between the second wall and the thickness-regulating member. | 03-07-2013 |
20130071147 | 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, and a planar metal developer regulator to adjust an amount of developer carried by the developer bearer to the development range. The developer bearer includes a developer carrying range having surface unevenness, and the developer regulator includes a fixed end portion held by a regulator holder and a free end portion to contact a surface of the developer bearer. | 03-21-2013 |
20130078007 | Blade Pressing Member and Developer Cartridge - A developer cartridge includes a casing, a developing roller, a blade, a first blade pressing member and a second blade pressing member. The casing is configured to store developer therein. The developing roller is rotatably supported by the casing. The blade has a first end portion and a second end portion opposite to the first end portion. The first end portion is supported by the casing. The blade is configured to regulate the developer carried on a peripheral surface of the developing roller to a predetermined thickness at the second end portion. The first blade pressing member is configured to press the first end portion of the blade. The second blade pressing member is configured to be attached to and removed from the casing. The second blade pressing member includes a pressing portion configured to press the second end portion of the blade toward the developing roller. | 03-28-2013 |
20130108330 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME | 05-02-2013 |
20130108331 | Developing Device for Preventing Toner Leakage | 05-02-2013 |
20130164046 | DOCTOR BLADE FOR IMAGE FORMING DEVICE - A doctor blade of an image forming device for controlling a thickness of a toner coated on a development roller to a uniform thickness inside the image forming device is disclosed. The doctor blade includes: a support rod serving as a support fixture; a plate formed in an L shape, the plate being mounted on the lower surface and the rear surface of the support rod in contact with them to thereby serve to keep a uniform thickness of the toner in a state where the bottom surface is in contact with the development roller, the plate including a base layer of a metallic material and a coated layer formed on the bottom surface of the base layer getting in contact with the development roller; and a torsion spring mounted above the support rod to pressurize the support rod and the plate in order to fix the support rod and the plate. The doctor blade is reusable because only the plate is simply replaced with a new one when the coated layer formed on the plate is worn out. | 06-27-2013 |
20130170876 | Developer Unit Architecture for an Imaging Device - A removable unit for an electrophotographic imaging device includes a housing having an opening, a rotatable roll disposed near the opening and adjacent to a bottom of the housing and a blade assembly coupled to the housing. The blade assembly includes a support bracket secured to a wall defining at least a part of the opening of the housing, and a blade member coupled to the support bracket and being positioned in the removable unit so that a distal end portion of the blade member engages with the rotatable roll. The housing, the blade assembly, and a portion of a surface of the rotatable roll define a substantially sealed enclosure for containing toner therein. | 07-04-2013 |
20130183068 | Bias Member for the Doctor Blade of the Developer Unit in an Imaging Device - A doctor blade assembly for the developer unit of an electrophotographic imaging system. The doctor blade assembly includes a blade member having a first longitudinal edge for contacting a developer roll of an imaging system; a bracket member operatively connected to the blade member; and at least one bias member having a first end portion along a first longitudinal end portion of the bracket member and a second end portion contacting a distal portion of the blade member so as to present a force thereon. The force presented by the bias member serves as a counterforce to at least partly offset a force presented on the doctor blade and developer roll by a seal member of the developer unit. | 07-18-2013 |
20130188996 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - This disclosure relates to a developing device supplying a non-magnetic one-component developer onto an image bearing member on which an electrostatic latent image is formed. The developing device has an accommodating portion, a supply roller, a development roller, and a regulating member. The accommodating portion accommodates the developer. The supply roller holds the developer accommodated in the accommodating portion on the outer circumferential surface thereof. The development roller has a roller portion, and a rotational shaft member. The roller portion receives the developer supplied from the supply roller and holds a developer layer on the outer circumferential surface thereof. The rotational shaft member is arranged to extend along a rotational axis and has at least one magnet portion. The regulating member is a plate member arranged to be surface contacted onto the surface of the developer layer on the development roller and having part thereof configured of a magnetic member. | 07-25-2013 |
20130188997 | Developing Device Having Thickness Regulation Blade - A developing device includes: a casing; a developing roller rotatably supported to the casing; a resiliently deformable blade supported to the casing and extending in an axial direction of the developing roller; and a regulation portion. The developing roller is rotatable in a rotational direction and to carry a layer of developer thereon. The blade has a first surface facing the developing roller. The regulation portion is configured to be in contact with the developing roller to regulate a thickness of the layer of the developer. The blade is formed with a through-hole to allow a material of the regulation portion to pass therethrough to form the regulation portion, the through-hole being exclusively formed in a central area in the axial direction assuming that the blade were divided into three areas each having an identical length in the axial direction with each other. | 07-25-2013 |
20130188998 | Developing Device Having Thickness Regulation Blade - A developing device includes: a casing; a developing roller rotatably supported to the casing; a resiliently deformable blade supported to the casing; a regulation portion; and a covering portion. The developing roller is rotatable in a rotational direction and carries a layer of developer thereon. The blade extends in an axial direction of the developing roller and has one axial end portion formed with a through-hole, the blade having a first surface facing the developing roller and a second surface opposite to the first surface. The regulation portion is configured to be in contact with the developing roller to regulate a thickness of the layer of the developer carried on the developing roller. The covering portion is provided on the second surface and positioned to cover the through-hole. | 07-25-2013 |
20130188999 | DEVELOPER CARRYING MEMBER, PROCESS FOR ITS PRODUCTION, AND DEVELOPING ASSEMBLY - A developer carrying member is provided the surface layer of which can make a developer stable by controlling its triboelectric charging strongly and which can maintain a high image quality over a long period of time even where a developer made highly spherical-particle or a small-particle developer is used. The developer carrying member has a substrate and a surface layer. The surface layer is a cured product of a resin composition containing a binder resin, conductive particles, a quaternary ammonium salt and an azo metal complex compound, the binder resin has in the molecular structure at least one structure selected from the group consisting of an —NH | 07-25-2013 |
20130209143 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device including: a toner bearing member configured to bear a toner on a surface of the toner bearing member and configured such that the surface thereof is rotated to supply the toner to and develop a latent electrostatic image on a surface of a latent electrostatic image bearing member in a developing region which faces the latent electrostatic image bearing member; and a regulating member configured to regulate an amount of the toner to be moved towards the developing region, wherein the surface of the toner bearing member has regularly arranged convex portions, and wherein a non-electrostatic adhesive force between the toner and the surface of the toner bearing member is less than 9.0 nN. | 08-15-2013 |
20130216276 | DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE INCORPORATING SAME - A development device includes a developer bearer to carry by rotation developer to a development range facing a latent image bearer and a developer regulator to adjust an amount of developer transported to the development range by the developer bearer. The developer bearer includes a developer carrying range having surface unevenness; and a surface of the developer bearer is coated with a coating material including a resin material and particles to roughen the surface. | 08-22-2013 |
20130216277 | DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE INCORPORATING SAME - A development device includes a developer bearer to carry by rotation developer to a development range facing a latent image bearer, and a developer regulator to adjust an amount of developer transported to the development range by the developer bearer. Multiple projections are formed in a surface of the developer bearer, and, in a direction in which the developer bearer rotates, a downstream end of each of the multiple projections is higher than an upstream end of the projection. | 08-22-2013 |
20130216278 | DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE INCORPORATING SAME - A development device includes a developer bearer to carry by rotation developer to a development range facing a latent image bearer, and a developer regulator to contact the developer bearer and adjust an amount of developer transported to the development range by the developer bearer. Multiple projections are formed in a surface of the developer bearer. The developer regulator has an end face, an opposed face facing the developer bearer, and an edge face connecting the opposed face to the end face, and the edge face of the developer regulator contacts the developer bearer. | 08-22-2013 |
20130243498 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing apparatus for an image forming apparatus, the developing apparatus comprising a developer carrying member for carrying a developer to develop an electrostatic latent image formed on an image bearing member; and a regulating member contacted to the developer carrying member to regulate a layer thickness of the developer on the developer carrying member, wherein the developer carrying member includes a surface layer having a storage modulus E′ satisfying 15 Pa≦E′≦30 Pa, the regulating member includes an free end having a curved surface to define a space with the surface layer to provide an entrance for the developer, and the curved surface has a radius of curvature R satisfying 100 μm≦R≦500 μm. | 09-19-2013 |
20130243499 | DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS AND PROCESS UNIT INCORPORATING SAME - A development device includes a developer bearer to carry developer thereon and receive a development bias and a developer regulator to adjust an amount of developer carried on the developer bearer. Multiple recesses recessed from a reference surface area are formed in a surface of the developer bearer, the developer bearer includes a conductive base in which the recesses are formed, and the conductive base in the reference surface area is coated with an insulative surface layer. | 09-19-2013 |
20130272754 | DEVELOPING DEVICE - According to one embodiment, a developing device includes a developer carrier arranged opposite to an image carrier on which an electrostatic latent image is formed and configured to supply toner for the electrostatic latent image and a toner layer regulating member configured to be pressed against the developer carrier to regulate the thickness of a toner layer on the developer carrier and the pressured surface of the developer carrier can be moved. | 10-17-2013 |
20130279947 | DEVELOPING APPARATUS AND PROCESS CARTRIDGE - A developing apparatus used in an image forming apparatus, including: a developer carrying member configured to carry a developer; and a control member configured to control the amount of a developer carried on the developer carrying member, wherein the control member is manufactured by cutting a supporting member covered with a covering member in a cutting direction intersecting a surface of the supporting member so as to be a predetermined length in the longitudinal direction thereof, and the covering member provided on the upstream side of the control member in the cutting direction comes into contact with the developer carrying member. | 10-24-2013 |
20130287453 | DEVELOPING APPARATUS AND PROCESS CARTRIDGE - A developing apparatus, including: a developer carrying member; a developer feeding member configured to feed the developer to the developer carrying member in abutment with the developer carrying member; and a developer regulating member having a distal end portion directed toward an upstream side in a rotation direction of the developer carrying member, and configured to regulate a layer thickness of the developer on the developer carrying member in abutment with a surface thereof. Surfaces of the developer carrying member and the developer feeding member move in the same direction in an abutment portion. The distal end portion of the developer regulating member has a developer taking-in portion away from the surface of the developer carrying member toward the upstream side in the rotation direction. The developer taking-in portion is positioned upstream of an abutment position between the developer regulating member and the developer carrying member. | 10-31-2013 |
20130322932 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developer regulating member is rotatably supported. A distance from the rotation center of the developer regulating member to the center of a developer carrying member is more than a distance from the center of a shaft portion to the leading edge of an elastic member and the bending angle β of the elastic member which is calculated from β=PL | 12-05-2013 |
20140003845 | DEVELOPING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS | 01-02-2014 |
20140086642 | DEVELOPING CARTRIDGES WITH FIXED PROTRUSIONS AND MANUFACTURING METHOD THEREOF - Developing cartridges include a main body, a developer transport member, and a developer thickness regulating member. The main body includes a first and second side portions separated from each other along a direction. The developer thickness regulating member regulates a developer thickness and extends in a direction between the first and second side portions. The developer thickness regulating member includes an end portion, which is disposed near the first side portion, and a first protrusion, which extends along the particular direction from the end portion to at least the first side portion. The main body forms a cavity in the first side portion. The cavity is defined by at least a first surface, a second surface opposing the first surface, and a second protrusion that protrudes from the first surface toward the second surface. The first protrusion is fixed at a position between the second protrusion and the second surface. | 03-27-2014 |
20140119781 | FITTING STRUCTURE FOR A PLATE-FORM MEMBER - A fitting structure for fitting a plate-form member to a fitting destination member such that a position of the plate-form member relative to a target member is adjustable, the fitting structure has an adjustment pin inserted, in a fashion movable in a position adjustment direction, in an adjustment hole formed in the plate-form member; and a screw member for fastening the plate-form member to the fitting destination member, wherein a direction of a force of the screw member that acts upon the plate-form member when the screw member is in a position where the screw member fastens the plate-form member points from a side where a gap formed between the adjustment pin and the adjustment hole is smaller to a side where the gap is larger. | 05-01-2014 |
20140178108 | SYSTEM AND APPARATUS FOR TONER CHARGING USING CHARGE/METERING BLADE HAVING AN ADJUSTABLE NIP - A developer apparatus including a housing defining a chamber storing a supply of toner, and a developer roll disposed in the chamber, the developer roll configured to rotate about a longitudinal access to transport toner on a surface of the developer roll to a development zone. The developer apparatus also includes a charge/metering blade having a curved section configured to contact the surface of the developer roll so as to form an adjustable contact nip. The charge/metering blade also includes an overhang configured to control an amount of toner to enter the adjustable contact nip formed by the at least one curved section of the charge/metering blade. | 06-26-2014 |
20140212183 | DEVELOPING DEVICE - A developing device is provided. The developing device includes a housing, a developer carrier which is rotatably supported by the housing, and a layer thickness regulating member which includes a blade configured to contact the developer carrier along a rotational axial direction of the developer carrier, a support member supporting the blade, and a reinforcement member provided at an opposite side to the support member with respect to the blade and reinforcing the blade. The support member includes a first part which contacts the blade, and to which the blade is fixed, a second part which is connected to the reinforcement member, and a third part which is attached to the housing. As viewed from the rotational axial direction, the first part and the third part are provided on a same first plane, and the second part is provided on a second plane intersecting with the first plane. | 07-31-2014 |
20140241761 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device and an image forming apparatus including the developing device are provided. The developing device includes a housing, a developer carrier which is rotatably supported by the housing, and which carries developer on a circumferential surface thereof, a layer thickness regulating member which includes, a blade contacting the circumferential surface of the developer carrier along a rotational axial direction of the developer carrier, and a support member supporting the blade, the layer thickness regulating member for regulating a layer thickness of the developer on the circumferential surface of the developer carrier. The support member includes: a contact part which contacts the blade; and a pair of attachment parts which are attached to the housing. The attachment parts are provide at both sides of the contact part in the rotational axial direction and are further protruded than the contact part in a direction away from the developer carrier. | 08-28-2014 |
20140255061 | DEVELOPING DEVICE - A developing device includes: a developer carrying member (sleeve); a regulating portion including an edge portion at a closest position to a surface of the sleeve or a flat portion tilted, at the closest position, by an angle of 2 degrees or less relative to a contact flat plane contacting the surface of the sleeve; and a rectifying portion connected with the edge or flat portion. The rectifying portion has a concavely curved surface such that a rate of a decrease in gap between the rectifying portion and the contact flat plane increases toward a downstream side of the developer feeding direction and is formed by smoothly connecting rectilinear or curved lines each of 0.2 mm or less except for the edge portion so that the gap between the rectifying portion and the contact flat plane is monotonically decreases toward the downstream side of the developer feeding direction. | 09-11-2014 |
20140270861 | DEVELOPING DEVICE AND PROCESS UNIT AND IMAGE FORMING APPARATUS INCORPORATING SAME - A developing device includes a toner bearer including a surface in which multiple recesses having a cross-sectional void rate of 50% or smaller are formed, a toner supply member to supply toner to the toner bearer, and a developer regulator disposed facing or in contact with the toner bearer and including a bent tip portion. The toner bearer has a surface roughness Ra within a range from 1.0 μm to 2.0 μm, and a surface area ratio within a range from 2.0 to 4.0. The developing device uses polymerized toner having a weight average particle diameter of 8.0 μm or smaller and an average circularity of 0.98 or greater. | 09-18-2014 |
20140314453 | DEVELOPING UNIT AND IMAGE FORMING APPARATUS USING THE SAME - A developing unit and an image forming apparatus using the may include a photosensitive body having an electrostatic latent image formed thereon, a feed roller to supply a developing agent, a regulating member to regulate the amount of the developing agent transported to the developing member, and a protection member having a protection blade disposed at one side of the regulating member to be spaced apart from the regulating member to protect the regulating member. The regulating member may be prevented from being damaged or degraded and protected from an external environment. | 10-23-2014 |
20140321887 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing device for an image forming apparatus includes a developing roller for carrying a developer; a developing blade including a blade member for regulating a developer amount carried on a surface of the developing roller and a supporting member for supporting the blade member; and a frame supporting the supporting member: wherein the supporting member is fixed to the frame in a state that a first region thereof adjacent the blade member tends to expand and a second region thereof remote from the blade member tends to contract, such that a stretching force is applied to the blade member in a rotation axial direction of the developing roller, and the blade member is fixed to the supporting member in the first region. | 10-30-2014 |
20140348556 | DEVELOPING DEVICE AND PROCESS CARTRIDGE - A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member. | 11-27-2014 |
20140356033 | IMAGE FORMING APPARATUS - An image forming apparatus includes a plurality of developing portions. Each of the developing portions includes a developer supporting member for supplying developer containing at least a binder resin to an image supporting member that supports a static latent image to develop the static latent image; and a layer regulating member arranged to contact with a surface of the developer supporting member and regulate a layer of developer. The image forming apparatus includes a first developing portion that uses first developer containing a metal oxide in the binder resin, and a second developing portion that uses second developer containing no metal oxide in the binder resin. The layer regulating member of the first developing portion is configured to apply a pressure to the developer supporting member smaller than that of the layer regulating member of the second developing portion applied to the developer supporting member. | 12-04-2014 |
20140356034 | DEVELOPING DEVICE - A developing device includes: a housing made of resin; a developer carrier, which is rotatably supported by the housing, and which is configured to carry developer on a circumferential surface thereof; a receiving-side coupling member, which is provided rotatably to one of end portions of the developer carrier and is configured to couple with a driving-side coupling member in the rotational axial direction to transmit driving force to the developer carrier; a blade, which is provided along the rotational axial direction, and which configured to contact the circumferential surface of the developer carrier to regulate a layer thickness of the developer on the circumferential surface; and a support member, which is bent into an L-shape as viewed from the rotational axial direction, and which supports the blade, wherein the receiving-side coupling member is overlapped with a bending portion of the support member, as viewed from the rotational axial direction. | 12-04-2014 |
20150030356 | CHARGE BLADE HAVING MULTIPLE CONTACT POINT METERING - A charge blade meters and applies an electrical charge to toner while the toner is on a development roll. The end portion of the charge blade comprises a first curved surface and a second curved surface touching the development roll. The first curved surface has a smaller radius and is a longer distance from the middle portion of the charge blade relative to the second curved surface. The first curved surface produces a first amount of charge in the toner on the development roll, and the second curved surface increases and makes more uniform the charge within the toner on the development roll. Also, the smaller radius of the first curved surface controls the amount of toner positioned on the development roll and the larger radius of the second curved surface does not affect the amount of toner metered by the first, smaller radius curved surface. | 01-29-2015 |
20150043949 | DEVELOPMENT DEVICE HAVING MULTIPLE CHARGE BLADES - A printing apparatus herein includes a sheet feeder and a photoreceptor adjacent the sheet feeder. The photoreceptor receives print media from the sheet feeder, and the photoreceptor transfers toner to the print media. A development roll is adjacent the photoreceptor. The development roll supplies a metered amount of charged toner to the photoreceptor. Also, a supply roll is adjacent the development roll. The supply roll supplies toner to the development roll. In this device, multiple charge blades (e.g., first, second, third, etc., charge blades) contact the development roll, and a charge generator can be electrically connected to the charge blade, supply roll, and development roll. | 02-12-2015 |
20150043950 | DEVELOPING DEVICE AND LAYER THICKNESS REGULATING MEMBER - A developing device includes: a developer carrying member and a layer thickness regulating member. The layer thickness regulating member includes: an opposing portion, a regulating portion, side wall portions, and a plurality of rib portions each extending from the side wall portion in one end side to the side wall portion in the other end side with respect to the rotational axis direction of the developer carrying member. A space is formed by being defined by the side wall portions and the rib portions. Substantial no rib portion dividing the space with respect to a longitudinal direction of said layer thickness regulating member is provided. | 02-12-2015 |
20150043951 | LAYER THICKNESS REGULATING MEMBER FOR REGULATING LAYER THICKNESS OF DEVELOPER CARRIED ON DEVELOPER CARRYING MEMBER AND LAYER THICKNESS REGULATING MEMBER MANUFACTURING METHOD - A layer thickness regulating member includes: an opposing portion having an opposing surface to a peripheral surface of a developer carrying member; and a layer thickness regulating portion, projected from the opposing surface toward the developer carrying member, for regulating a layer thickness of a developer carried on the developer carrying member. The layer thickness regulating portion is integrally molded with the opposing portion. The layer thickness regulating member is, after being molded in a metal mold, separated by being pushed from a side opposite from the opposing portion of the layer thickness regulating member when the layer thickness regulating member is separated from the metal mold. | 02-12-2015 |
20150043952 | REGULATING MEMBER AND DEVELOPING DEVICE - A regulating member for regulating a layer thickness of a developer carried on a developer carrying member, includes: a regulating portion for regulating the layer thickness of the developer carried on the developer carrying member; an opposing portion provided integrally with the regulating portion at an opposing position to the developer carrying member, wherein the opposing portion is provided so as to cover a rectilinear line passing through a developing gap formed, when the regulating member is mounted relative to the developer carrying member, with a predetermined interval between the developer carrying member and an image bearing member on which a latent image to be developed by the developer carrying member is formed; and an opening provided on the rectilinear line passing through the developing gap at the opposing portion. | 02-12-2015 |
20150055988 | DEVELOPING ASSEMBLY, PROCESS CARTRIDGE, AND IMAGE-FORMING APPARATUS - In a developing assembly, the surface of a developer bearing member on which a developer is borne is provided with a first dielectric portion and a second dielectric portion. A regulating portion that regulates the layer thickness of the developer borne on the developer bearing member, the first dielectric portion, and the second dielectric portion each have a charge polarity opposite to the charge polarity of the developer. In a triboelectric series, one of the first dielectric portion and the second dielectric portion is positioned between the developer and the other dielectric portion, and the other dielectric portion is positioned between the one of the dielectric portions and the regulating portion. | 02-26-2015 |
20150055989 | DEVELOPING ASSEMBLY, PROCESS CARTRIDGE, AND IMAGE-FORMING APPARATUS - First and second dielectric portions and colored particles have − polarity, and a regulating portion and an externally added particles have + polarity; concerning triboelectric series, (−)the difference between the regulating portion and the externally added particles. | 02-26-2015 |
20150055990 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developing agent bearing member and a regulating member. The developing agent bearing member bears on a surface thereof a developing agent including colored particles and additive particles disposed on the surface of the colored particles. The surface of the developing agent bearing member includes first and second dielectric portions. The regulating member regulates the thickness of a layer of developing agent borne by the developing agent bearing member. In triboelectric series, the first dielectric portion is between the regulating member and the additive particles, the additive particles are between the first dielectric portion and the second dielectric portion, and the second dielectric portion is between the additive particles and the colored particles. The difference between the work functions of the colored particles and second dielectric portion is smaller than that between the second dielectric portion and additive particles. | 02-26-2015 |
20150055991 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer bearing member that bears a developer on its surface to supply the developer to an image bearing member having a first dielectric portion and a second dielectric portion in its surface, a regulating member that regulates a thickness of a layer of the developer carried by the developer bearing member, and a flexible sheet-like charging auxiliary member disposed so as to be in contact with the developer bearing member at a position downstream of a contact portion between the developer bearing member and the image bearing member and upstream of a contact portion between the developer bearing member and the regulating member in a rotational direction of the developer bearing member, where the charging auxiliary member charges the developer carried by the developer bearing member. In a triboelectric series, the charging auxiliary member is positioned between the first and second dielectric portions. | 02-26-2015 |
20150078789 | DEVELOPING APPARATUS HAVING THICKNESS REGULATING MEMBER, SEALING MEMBER, AND RESTRICTING MEMBER - In a developing apparatus, a sealing member has a first part contacting an axial end part of a developing roller and a second part including a first side surface. A roller body of a supply roller includes a contact surface that contacts the peripheral surface, and a second side surface located at an end of the contact surface in the axial direction. The restricting member has a one side and another side. The one side is opposed to the second side surface in the axial direction. The another side is opposed to the first side surface in the axial direction with a gap. The gap is communicated with an interior space of a developer accommodating frame such that the developer is capable of moving away from a nip position between the supply roller and the developing roller toward the bottom wall of the developing frame in the gap. | 03-19-2015 |
20150086249 | Cartridge - A cartridge include a housing configured to accommodate a developing agent therein, a developing agent carrying member configured to carry the developing agent, a layer thickness restricting member disposed between the housing and the developing agent carrying member and configured to restrict a layer thickness of the developing agent carried by the developing agent carrying member, and a spacer disposed between the housing and the layer thickness restricting member in a first direction in which the developing agent carrying member and the layer thickness restricting member face one another and in which is orthogonal to a longitudinal direction of the developing agent carrying member. The spacer includes a first engaged portion configured to be engaged. The layer thickness restricting member includes a first engaging portion configured to engage with the first engaged portion such that relative movement of the spacer and the layer thickness restricting member is restricted. | 03-26-2015 |
20150093155 | Developing Device, Blade Assembly, and Developing Device Manufacturing Method - A developing blade apparatus may include a supporting a protrusion and a developing blade connected to the supporting member and including an opening. The protrusion of the supporting member may be disposed within the opening. The developing blade may include a plurality of weld marks that includes a first weld mark and a second weld mark. The protrusion and the opening are disposed between the first weld mark and the second weld mark on an imaginary straight line connecting the first weld mark and the second weld mark. | 04-02-2015 |
20150093156 | Developing Device, Blade Unit, and Developing Device Manufacturing Method - Aspects include an apparatus, a blade assembly, and a method for manufacturing the apparatus with the blade assembly. The apparatus may include a developer carrier for carrying developer and a blade assembly. The blade assembly may include a blade disposed adjacent to the developer carrier and configured to regulate an amount of developer on the developer carrier. The blade may include a plurality of weld marks joining the blade to the supporting member. Each of the plurality of weld marks may overlap with an adjacent one of the plurality of weld marks. Together the weld marks may form a combined weld mark that extends in a direction that the blade extends. | 04-02-2015 |
20150093157 | Developing Device, Blade Unit, and Developing Device Manufacturing Method - Aspects include an apparatus, a blade assembly, and a method for manufacturing the apparatus with the blade assembly. The apparatus may include a developer carrier for carrying developer and a blade assembly. The blade assembly may include a blade disposed adjacent to the developer carrier and configured to regulate an amount of developer on the developer carrier. The blade may include a weld mark joining the blade to the supporting member. A first dimension of the weld mark in a first direction may be greater than a second dimension of the weld mark in a second direction perpendicular to the first direction, and a third dimension of the weld mark in a third direction may be a dimension of the thickness of the blade. The weld mark may be formed by irradiating a laser beam onto the blade while moving the laser beam or the blade. | 04-02-2015 |
20150104224 | METHOD AND COMPOSITION FOR RECOATING TONER CARTRIDGE DEVELOPING MEMBER - Methods of recoating a developing member such as the doctor blade, developing member bar or a developing sleeve, of an electro-photographic image forming apparatus, such as a laser printer toner cartridge, methods of re-using the original components by re-coating them, to cut the cost of using new aftermarket parts and to reduce waste, which methods include close quality control and “tailoring” of formulations to a specific developing system, thus achieving better print quality in terms of density, page yield, and uniformity for the repaired or remanufactured toner cartridge. | 04-16-2015 |
20150132028 | IMAGE FORMING APPARATUS - In an image forming apparatus having a photosensitive drum capable of carrying a toner image, a developing roller that is provided to be capable of rotating while carrying toner, and that supplies the toner to the photosensitive drum by contacting the photosensitive drum, a regulating blade that regulates a layer thickness of the toner carried on the developing roller, and voltage applying device for applying a voltage to the developing roller and the regulating blade, the developing roller includes a conductive base layer and a surface layer covering the base layer, and a surface charge density of the developing roller is equal to or smaller than a surface charge density of the toner. | 05-14-2015 |
20150132029 | REGULATING MEMBER, DEVELOPING DEVICE AND PROCESS CARTRIDGE - A regulating member for regulating a developer amount carried on a developer carrying member includes a plate-like supporting member having an elasticity, the supporting member being provided with a fixed portion for being fixed to a fixed part; a first contact portion contactable to the developer carrying member, the first contact portion protruding from the regulating member from a side of the supporting member; and a second contact portion contactable to and the developer carrying member, the second contact portion being at a position closer to the fixed portion than the first contact portion. | 05-14-2015 |
20150147098 | PRINTER CARTRIDGE WITH TONER WALL - An improved printer cartridge is provided with a barrier for reducing pressure on printing assembly components in an extended yield cartridge. A printing assembly, including cartridge casing, magnetic developer roller, and hopper, is provided for use with laser printers. A barrier formed by a base and a wall is positioned within the cartridge casing, between the magnetic developer roller and a feed section of the hopper. The wall of the barrier is tangent to the magnetic developer roller, minimizing the area of the magnetic developer roller which is exposed to a medium stored within the hopper and feed section, such as toner. Since exposed surface area is reduce, the amount of pressure on the magnetic developer roller is correspondingly reduced, allowing for an increase in lifespan for the magnetic roller and interactive components, primarily a doctor blade and sealing blade. | 05-28-2015 |
20150301474 | Capacitive Toner Level Sensor - A toner container including a first electrode disposed within the toner container, a second electrode electrically connected to the first electrode and disposed within the toner container, and a sense electrode disposed between the first electrode and the second electrode. The sense electrode and the first electrode form a first capacitor having a first capacitance that changes in response to a change in toner amount existing therebetween. The sense electrode and the second electrode form a second capacitor having a second capacitance that changes in response to a change in toner amount existing therebetween. | 10-22-2015 |
20150301475 | Image Forming Device Having Detachable Developing Device Unit - An image forming device includes a plurality of developing devices, and a plurality of sloping members disposed in one-to-one correspondence with the plurality of developing devices. Each developing device includes a developer accommodating chamber and a developing roller disposed above the developer accommodating chamber. Each developing device is movable between a first position and a second position lower than the first position in a height direction generally parallel to a vertical direction. Each sloping member has a sloped surface movable in the height direction and a biasing member biasing the sloped surface upward in the height direction. Each sloping member is movable between a third position where the corresponding developing device is placed on the sloped surface and a fourth position where the corresponding developing device is released from being pressed by the sloped surface in a predetermined direction generally perpendicular to the vertical direction. | 10-22-2015 |
20150331353 | Developing Cartridge - A process cartridge, which includes a developing cartridge and a photosensitive cartridge for use with an image forming apparatus including a driving force output part and a feeding part, is provided. The developing cartridge includes a developer carrier, a first electrode provided at one side thereof, and a driving force receiving part provided at another side thereof and aligned with the first electrode such that the driving force receiving part overlaps the first electrode in a side view. The photosensitive cartridge, to which the developing cartridge is removably mounted, includes a photosensitive member, and a second electrode that contacts the first electrode when the developing cartridge is mounted in the photosensitive cartridge and that contacts the feeding part when the photosensitive cartridge is mounted in the image forming apparatus. The first electrode is pressed toward the driving force receiving part by contact with the second electrode. | 11-19-2015 |
20150338772 | CARTRIDGE AND IMAGE FORMING APPARATUS - A cartridge includes a rotating body, a blade that extends in an axial direction of the rotating body and is disposed on the rotating body, a supporting member that is fixed to the blade and configured to support the blade in such a manner that the blade protrudes toward the rotating body in a shorter direction crossing the axial direction, a frame body including a placing surface that supports the supporting member, and a fixed portion that is disposed on the placing surface via the supporting member and fixed to the frame body. The supporting member includes a cut portion extending in the axial direction. The fixed portion includes a deformed portion deformed by given energy, and the deformed portion engages with the cut portion so that movement of the supporting member with respect to the frame body is restricted. | 11-26-2015 |
20150362858 | DEVELOPING ASSEMBLY AND IMAGE FORMING APPARATUS - A sliding member has a free end that extends toward the downstream side of the direction of rotation of a developer bearing member, and a tip portion on the free end side of the sliding member slides against the developer bearing member. The developer bearing member has a region where, when a developer is placed on a vertical direction upper side of the developer bearing member which is in a stationary state, the developer can remain without dropping. A position against which the tip portion of the sliding member slides, the abovementioned region, and a position against which a regulating member slides are located on the developer bearing member in this order toward the downstream side of the direction of rotation of the developer bearing member. | 12-17-2015 |
20160062265 | DEVELOPING DEVICE AND PROCESS CARTRIDGE - A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member. | 03-03-2016 |
20160070197 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a drum unit having a photosensitive drum: a developing device having a developing roller that supplies toner to the image bearing member and a developer container that rotatably supports the developing roller; and a main apparatus body to which the drum unit and the developing device are detachably attached. The drum unit and the developing device are integrally attachable to and integrally detachable from the main apparatus body. The developer container includes a pair of ribs on an upper surface thereof at positions corresponding to opposite axial ends of the developing roller. The ribs abut against a casing part of the main apparatus body while the drum unit and the developing device are being integrally attached to and integrally detached from the main apparatus body. | 03-10-2016 |
20160109824 | DEVELOPING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A developing device includes: a developing container, a developer carrying member, and a plate-like elastic member. An angle formed between a reference surface passing through a surface of the elastic member continuous to a contact portion of the elastic member with the developer carrying member and downstream of the contact portion with respect to the movement direction of the developer carrying member and a tangent plane of the developer carrying member under no load at a contact position between the elastic member and the developer carrying member is 10° or more and 45° or less. The elastic member includes a first region including the contact portion and a second region provided continuously from the first region toward the supporting portion of the elastic member and lower in rigidity than the first region. The second region is provided downstream of the reference surface with respect to the movement direction. | 04-21-2016 |
20160154337 | Capacitive Toner Level Sensor | 06-02-2016 |
20160187810 | DEVELOPING UNIT, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - There is provided a developing unit capable of suppressing a memory to leave on a developing roller even when held under high-temperature and high-humidity conditions for a long period of time before the start of use. | 06-30-2016 |