Patent application number | Description | Published |
20100003614 | RESIN COATED CARRIER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - The resin coated carrier is used with a toner in which an external additive having an average primary particle size of 50 nm or more is added to a toner particle, and has a carrier core and a resin coating layer on the surface of the carrier core. In the resin coated carrier, the following expression (1) is satisfied: | 01-07-2010 |
20100055597 | METHOD FOR PRODUCING TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A method for producing a toner, that can produce a low temperature fixable toner in a stable manner, a toner produced by the production method, a two-component developer using the toner, a developing device and an image forming apparatus are provided. The toner is produced using an aqueous dispersion obtained by dispersing a crystalline self-dispersion polyester resin having at least one carboxyl group and containing a compound represented by the following chemical formula (I) as an alcohol component in an aqueous medium. The aqueous dispersion, a colorant particle aqueous dispersion and a wax particle aqueous dispersion are mixed to aggregate, and a non-crystalline self-dispersion polyester resin particle aqueous dispersion is further added to perform aggregation. The liquid mixture containing the aggregates is heated and washed, thereby obtaining a toner: | 03-04-2010 |
20100135700 | DEVELOPER ,DEVELOPING UNIT,DEVELOPING DEVICE,AND IMAGE FORMING APPARATUS - A developer of the present invention includes a toner and a carrier. The toner contains a charge control agent, and the carrier has on its surface a coating layer to which a charge control agent and electrically conductive particles are added. All of constituent elements of one of the charge control agent of the toner and the charge control agent of the carrier are contained in constituent elements of the other one of the charge control agents. With the configuration, the developer of the present invention is capable of stably maintaining a toner charge amount and outputting high-quality images for long periods. | 06-03-2010 |
20100183340 | RESIN COATED CARRIER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A resin coated carrier is provided that can stably charge a toner having added thereto an external additive having a large particle size over a long period of time and can prevent blocking of a developer. The resin coated carrier satisfies the following formula (1): | 07-22-2010 |
20100248116 | METHOD FOR PRODUCING RESIN-COATED CARRIER, RESIN-COATED CARRIER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A method for producing a low density resin-coated carrier having a small resin amount to a carrier core material and having a uniform resin coating layer formed on the carrier core material is provided. A resin-coated carrier has a carrier core material and a resin coating layer formed on the surface of the carrier core material. The carrier core material has pores and an apparent density of 1.6 g/cm | 09-30-2010 |
20100279221 | RESIN-COATED CARRIER METHOD OF MANUFACTURING THE SAME, TWO-COMPONENT DEVELOPER INCLUDING RESIN-COATED CARRIER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A resin-coated carrier is provided. A resin-coated carrier includes a carrier core and a resin coating layer formed on a surface of the carrier core. The carrier core is composed of a porous material having surface fine pores formed on a surface thereof, and has an apparent density of 1.6 to 2.0 g/cm | 11-04-2010 |
20110008724 | TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A two-component developer is provided. The two-component developer includes a toner containing a binder resin, a colorant and a release agent, and a resin-coated carrier composed of a carrier core material and a resin coating layer formed on a surface of the carrier core material. The toner has an exposure rate of the release agent on the toner surface of 1.00% or above and 3.07% or below. The carrier core material has an apparent density of 1.86 g/cm | 01-13-2011 |
20120082927 | TWO-COMPONENT DEVELOPER AND IMAGE FORMING METHOD - A two-component developer includes a toner and a resin-coated carrier. To the toner, a plurality of types of external additives each of which has a different average primary particle size are externally added, at least one type of the external additives having an average primary particle size of 0.1 μm or more. The resin-coated carrier includes a carrier core formed of ferrite having a volume average particle size of 25 μm or more and 90 μm or less, and a resin coating layer that is formed on the surface of the carrier core and contains a magnetic fine particle having a volume average particle size of 0.1 μm or more and 2 μm or less and a silicone resin, wherein 40 parts by weight or more and 100 parts by weight or less of the magnetic fine particle based on 100 parts by weight of the silicone resin are contained. | 04-05-2012 |
Patent application number | Description | Published |
20080299471 | CARRIER, DEVELOPER, DEVELOPMENT DEVICE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A carrier of the present invention is used in a developer including a toner which includes at least a binder resin and an organic colorant, and the carrier has a core and a coating formed on the surface of the core, the coating including (i) a charge control agent for controlling a charge whose polarity is the same as a polarity of a charge controlled by a charge control agent included in the toner, and (ii) a conductive particles. The use of the carrier of the present invention enables: prevention of decrease in the charging amount of the toner which includes at least a binder resin and an organic colorant; and formation of a stable, high-resolution, high-quality image which has very few image defects such as a photographic fog. | 12-04-2008 |
20090226838 | CARRIER, DEVELOPER, DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS - There are provided a carrier which enables stable charging of toner and formation of a stable, high-definition and high-quality image which has very few image defects such as a fog, as well as a developer, a developing apparatus, and an image forming apparatus. A carrier is obtained by including a carrier core and a coating layer with which a surface of the carrier core is coated, the coating layer being obtained by curing a resin composition for coating that includes a crosslinked silicone-modified acrylic resin containing a macromonomer represented by the following general formula (1). A developer is obtained by such a carrier and a toner. | 09-10-2009 |