Patent application number | Description | Published |
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 |
20110236813 | ELECTROPHOTOGRAPHIC DEVELOPER, DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrophotographic developer is provided which includes: a toner that includes toner base particles and an external additive attached to a surface of the toner base particles and has an amount of Al on the surface of the toner base particles of from about 0.002 to about 0.02 atm %; and a carrier that includes magnetic particles and a coating resin layer that coats the magnetic particles, the coating resin layer including particles with a volume-average particle diameter of from about 80 to about 800 nm, such as organic particles or inorganic particles having an organic layer on a surface of the inorganic particles, the carrier satisfying any one of the following formulas, where SP1, SP2 and SP3 represent a solubility parameter of resin of the coating resin layer, the organic particles, and the organic layer respectively: | 09-29-2011 |
20110236820 | ELECTROSTATIC CHARGE IMAGE DEVELOPMENT CARRIER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic charge image development carrier includes magnetic core particles and a resin coating layer that contains titanium dioxide particles doped with niobium and coats each of the magnetic core particles. | 09-29-2011 |
20120322004 | ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER, METHOD OF PRODUCING ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER, ELECTROSTATIC CHARGE IMAGE DEVELOPING DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic charge image developing carrier includes a core particle and a coating layer with which the surface of the core particle is coated. The coating layer includes an acrylic resin having a constituent unit in which a silicone chain is disposed in a branch. | 12-20-2012 |
20130040236 | CARRIER FOR TWO-COMPONENT DEVELOPER, TWO-COMPONENT DEVELOPER, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - A carrier for a two-component developer includes magnetic particles, and a resin coating layer that covers the magnetic particles. The resin coating layer contains metal boride particles having a volume average primary particle diameter of from about 300 nm to about 2,500 nm. | 02-14-2013 |
20140051022 | ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic charge image developing carrier includes a core particle that has a BET specific surface area of from 0.15 m | 02-20-2014 |