| Patent application number | Description | Published |
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| 20080267668 | DEVELOPING UNIT, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD AND APPARATUS - A developing unit used in an image forming apparatus with a latent image carrier includes a developer carrier, a supply compartment, a recovery compartment, a separation member, and a gap. The developer carrier facing the latent image carrier rotates while carrying two-component developer containing toner and carrier and supplies the toner to the latent image. The supply compartment includes a supply transport member to transport the developer in a first direction. The recovery compartment includes a recovery transport member to transport the developer in a second direction. The separation member includes one end portion facing the latent image carrier at a facing area. The separation member separates the supply compartment and the recovery compartment and is disposed above the recovery compartment behind the separation member. The gap is provided at the facing area. The gap has a width of not more than 1.4 millimeters. | 10-30-2008 |
| 20090103943 | DEVELOPER, DEVELOPING DEVICE, IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD - A two-component developer used in an image forming apparatus including a latent image bearing member and a developing device includes a magnetic carrier and a toner. The toner includes a toner base and inorganic fine particles as an external additive. A loose apparent density of the toner is not greater than 0.39 g/cm | 04-23-2009 |
| 20100068645 | Carrier for developing electrostatic latent image, two-component developer, supplemental developer, process cartridge, and image forming method - A carrier for developing an electrostatic latent image which includes a core material and a resin coating layer provided on the core material. The resin coating layer includes a resin and a particulate tin oxide, and the surface of the particulate tin oxide is coated with carbon. | 03-18-2010 |
| 20100239975 | CARRIER FOR USE IN DEVELOPER DEVELOPING ELECTROSTATIC IMAGE, DEVELOPER USING THE CARRIER, AND IMAGE FORMING METHOD AND APPARATUS AND PROCESS CARTRIDGE USING THE DEVELOPER - The carrier includes a particulate core material having magnetism; and a resin layer located on the surface of the particulate core material. The resin layer is prepared by forming a layer including a copolymer, which includes a unit (A) having a specific acrylic siloxane structure, a unit (B) having a specific acrylic silicone structure having a crosslinking ability, and a unit (C) having a specific acrylic structure in a specific ratio, on the particulate core material, and then subjecting the layer to a heat treatment to crosslink the layer. | 09-23-2010 |
| 20110091802 | CARRIER, METHOD FOR PREPARING THE CARRIER, DEVELOPER USING THE CARRIER, DEVELOPER CONTAINER, AND IMAGE FORMING METHOD AND PROCESS CARTRIDGE USING THE DEVELOPER - The carrier is used for a two-component developer for developing an electrostatic latent image, and includes a particulate magnetic core material; and a cover layer located on a surface of the core material and including a crosslinked material and barium sulfate. The cover layer is formed by applying a coating medium including barium sulfate, a copolymer including a unit (A) having a specific acrylic siloxane structure including a tris(trialkylsiloxy)silanyl group and a unit (B) having a specific acrylic silicone structure having a crosslinking ability, and a condensation reaction catalyst, heating the applied medium to a temperature of from 100° C. to 230° C. so that the copolymer is hydrolyzed to produce a material having a silanol group, and the material and the catalyst are subjected to a condensation reaction to form the crosslinked material. | 04-21-2011 |
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| 20080317508 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - A developing device capable of conveying discharged developer to the outside of the device well by preventing developer from firmly adhering within a discharge conveyance path, as well as an image forming apparatus and a process cartridge having this developing device. A developing device, having: a developing roller; a developer conveyance path having a supply screw and a supply conveyance path; a toner replenishment controller for replenishing the developer to the developer conveyance path; a discharge conveyance path for conveying the developer to the outside of the developing device; a discharge screw serving as a discharge conveying member for applying a conveying force to the developer within the discharge conveyance path; and a developer discharge port serving as developer discharge means for discharging the developer to the discharge conveyance path, wherein the conveying force is applied to the discharged developer intermittently by the discharge screw serving as a discharge conveying member, whereby a shock is applied intermittently to the discharged developer within the discharge conveyance path. | 12-25-2008 |
| 20090324977 | LASER-WELDABLE RESIN COMPOSITION AND MOLDED PRODUCT - A laser-weldable polybutylene terephthalate-series resin composition having a high laser weldability, a high welding strength, and a high heat shock resistance is provided. | 12-31-2009 |
| 20110065037 | LATENT ELECTROSTATIC IMAGE DEVELOPING CARRIER, TWO-COMPONENT DEVELOPER AND IMAGE FORMING METHOD - A latent electrostatic image developing carrier including a carrier core material, and a coating layer containing a resin and provided on a surface of the carrier core material, wherein the coating layer includes a particulate material containing at least first fine conductive particles and second fine conductive particles, and wherein the first fine conductive particles and the second fine conductive particles satisfy the relationships expressed by Expressions 1 and 2, 3≦D1/D2≦15 . . . Expression 1, where D1 denotes a dispersed particle diameter of the first fine conductive particles and D2 denotes a dispersed particle diameter of the second fine conductive particles, and −7E≦R1×R2≦8E . . . Expression 2, where R1 denotes a powder specific resistance of the first fine conductive particles and R2 denotes a powder specific resistance of the second fine conductive particles. | 03-17-2011 |
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| 20090074473 | DEVELOPING AGENT REGULATING MEMBER, DEVELOPMENT UNIT AND IMAGE FORMING APPARATUS USING SAME, AND METHOD OF MANUFACTURING DEVELOPING AGENT REGULATING MEMBER - A developing agent regulating member and a method of manufacturing the same is provided. The method includes providing a non-magnetic member and a magnetic member. The non-magnetic member and the magnetic member are fixed together by caulking such that an end face of the non-magnetic member and an end face of the magnetic member are substantially aligned with each other, and such that the non-magnetic member and the magnetic member are closely pressed together in order to reduce a gap between the non-magnetic member and the magnetic member. The end face of the non-magnetic member and the end face of the magnetic member are polished so as to prepare the regulating face of the developing agent regulating member by making the end face of the non-magnetic member and the end face of the magnetic member flush. | 03-19-2009 |
| 20090232532 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - Provided is a developing device containing a two-component developer including a magnetic carrier and a toner; a developer bearing member containing a nonmagnetic developing sleeve configured to bear the two-component developer on a surface thereof while rotating; a magnetic field generating unit fixed inside of the nonmagnetic developing sleeve; and a developer amount control member configured to control an amount of the two-component developer borne on the developer bearing member. The magnetic carrier contains a core material and a coating layer coated on the core material, and the coating layer containing a binder resin and conductive particles. The magnetic carrier satisfy a ratio D/h of 1.00<[D/h]≦1.95, where D denotes an average primary particle diameter of the conductive fine particles, and h denotes a thickness of the coating layer, and a ratio Ra/D of 1.0<[Ra/D]≦10.0, where Ra denotes a surface roughness of the developing sleeve. | 09-17-2009 |
| 20100233613 | CARRIER - A carrier which is capable of avoiding excess blocking of the carrier particles at the time of forming a covering layer and is excellent in durability, a developer containing the carrier, and a developer container containing the developer, as well as an image forming method and a process cartridge which use the developer are provided. A carrier including at least a core material particle and a covering layer, a surface of the core material particle being covered with the covering layer, wherein the covering layer contains a condensate which is obtained by condensation of a silicone resin having at least one of a silanol group and a functional group which can be converted to the silanol group by hydrolysis, using a titanium diisopropoxy bis(ethylaceto-acetate) catalyst. | 09-16-2010 |
