| Patent application number | Description | Published |
|---|
| 20090061333 | CARRIER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT, AND DEVELOPER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT, METHOD OF FORMING AN IMAGE, DEVELOPER CARTRIDGE FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS USING THE SAME - A carrier for developing an electrostatic latent image includes carrier particles, and the carrier particles include magnetic particles and a coating layer coating the surfaces of the magnetic particles. The BET specific surface area of the magnetic particles is 0.1300 m | 03-05-2009 |
| 20090067894 | IMAGE FORMING APPARATUS - The present invention provides an image forming apparatus comprising at least an image holding member, an charging unit, a latent image forming unit, a developing unit, an intermediate transfer belt, a primary transfer unit, a secondary transfer unit, a fixing unit, and a cleaning unit, wherein a surface hardness of a side, of the intermediate transfer belt, contacting with the image holding member being 10 to 30, a carrier in the developer having at least two resin-coated layers on a surface of a core material containing ferrite, and the core material having a surface roughness Sm of 2.0 μm or less, a surface roughness Ra of 0.1 μm or more, and an average a circularity degree of 0.975 to 1.000. | 03-12-2009 |
| 20090109448 | ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, ELECTROSTATIC CHARGE IMAGE DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - An electrostatic charge image developing carrier includes: a magnetic particle; and a resin coating layer that covers a surface of the magnetic particle with a resin, the resin coating layer containing an acid having a cyclic diterpene structure and either of carbon black or nigrosine dispersed therein. | 04-30-2009 |
| 20090111042 | ELECTROSTATIC CHARGE IMAGE DEVELOPER, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - An electrostatic charge image developer includes a toner containing an external additive and a carrier comprising a resin-coated layer formed on a surface of a core material. The average shape factor SF1 of the toner is from 125 to 135, the number of particles having shape factor SF1 of less than 125 is from 5% to 30% by number with respect to the total number of toner particles, the number of particles having shape factor SF1 of greater than 135 is from 5% to 30% by number with respect to the total number of toner particles, the scratch line width in a scratch strength test of the resin used in the resin-coated layer is from 80 μm to 200 μm, and the scratch depth is from 60 μm to 150 μm. | 04-30-2009 |
| 20090245858 | ELECTROSTATIC CHARGE DEVELOPER, ELECTROSTATIC CHARGE IMAGE DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrostatic charge developer includes a carrier having a core material and a resin coating layer covering the surface of the core material, and a toner having a binder resin that contains a non-crystalline polyester resin and a crystalline polyester resin. The resin coating layer contains a copolymer that contains a nitrogen-containing acrylic ester or nitrogen-containing methacrylic ester and an alicyclic acrylic ester or alicyclic methacrylic ester. The non-crystalline polyester resin contains at least an alkyl succinic acid or an anhydride or lower alkyl ester thereof, or an alkenyl succinic acid or an anhydride or lower alkyl ester thereof. The crystalline polyester resin is an aliphatic polyester resin. | 10-01-2009 |
| 20100233605 | TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE AND IMAGE FORMING DEVICE - A toner for electrostatic charge image development has toner mother particles including a release agent, a colorant, and a binder resin including a crystalline resin, and an external additive to the toner mother particles including at least metatitanic acid and at least one selected from the group consisting of silicon oxide and fluoropolymer particles, and the addition weight ratio of the metatitanic acid to the at least one selected from the group consisting of silicon oxide and fluoropolymer particles is from 1:0.08 to 1:8.30 is provided. | 09-16-2010 |
| 20100239323 | CONTAINER FOR THE STORAGE OF TONER, CONTAINER FOR THE STORAGE OF DEVELOPER AND IMAGE-FORMING APPARATUS USING THESE CONTAINERS - A container for storing a toner includes: an electrostatic latent image developing toner that contains: a binder resin containing a polyester resin; a coloring agent; and a release agent, and that has a volume average particle size of about 4 to about 8 μm and an average degree of circularity of about 0.94 to about 0.99; and a toner container main body that stores the electrostatic latent image developing toner, the toner container main body including a material containing at least one of polyethylene terephthalate and polybutylene terephthalate. | 09-23-2010 |
| 20100330492 | CARRIER FOR ELECTROSTATIC DEVELOPMENT, DEVELOPER FOR ELECTROSTATIC DEVELOPMENT, DEVELOPER CARTRIDGE FOR ELECTROSTATIC DEVELOPMENT, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - The invention provides a carrier for electrostatic development, including ferrite particles and a coating layer including a resin having a cycloalkyl group, the ferrite particles including strontium in an amount of from about 0.1% by weight to about 1.0% by weight and having a BET specific surface area of from about 0.13 m | 12-30-2010 |
| 20110020747 | ELECTROPHOTOGRAPHIC CARRIER, ELECTROPHOTOGRAPHIC DEVELOPER, PROCESS CARTRIDGE AND IMAGE FORMING DEVICE - An electrophotographic carrier includes a magnetic core material and a resin layer that coats the magnetic core material, the resin layer comprising a resistance control agent and a polymer including a repeating unit derived from an alicyclic group-containing methacrylic ester, the resin layer including a monomer as a base material of the repeating unit in the polymer in an amount of from about 0.5% by weight to about 3.0% by weight relative to the total amount of the resin layer. | 01-27-2011 |
| 20110045399 | ELECTROSTATIC IMAGE DEVELOPING CARRIER, ELECTROSTATIC IMAGE DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - An electrostatic image developing carrier includes a ferrite particle and a resin layer that coats the ferrite particle, wherein a magnesium element content of the ferrite particle is from about 3.0% by weight to about 20.0% by weight; wherein a manganese element content of the ferrite particle is from about 0.2% by weight to about 0.8% by weight; and wherein a content of toluene is more than about 100 ppm and not more than about 2,000 ppm. | 02-24-2011 |
