Patent application number | Description | Published |
20100151378 | TONER - Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer member and a secondary transfer member with a cleaning blade, the toner containing at least toner particles (A) and small particles (B), wherein the toner particles (A) have an average circularity of from 0.93 to 0.99 and a number-based median diameter (D | 06-17-2010 |
20120028186 | PRODUCTION METHOD OF TWO-COMPONENT DEVELOPER - Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pit apertures on a surface of the particle, and the method comprises steps of blocking the pit apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore openings have been blocked, and mixing the resin coated carrier and the toner. | 02-02-2012 |
20120225379 | TWO-COMPONENT DEVELOPER - A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side. | 09-06-2012 |
20130171559 | TWO-COMPONENT DEVELOPING AGENT AND DEVELOPING METHOD - A two-component developing agent includes toner and a carrier including carrier particles. The toner includes a binding resin. The carrier particle includes a porous ferrite core particle and a resin covering layer. The resin covering layer covers the porous ferrite core particle. The resin covering layer includes ferrite particles. An average particle diameter of the ferrite particles ranges from 0.1 to 1.0 μm. | 07-04-2013 |
20140205326 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 1.05 to 1.65. | 07-24-2014 |
20140205327 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 0.60 to 0.95. | 07-24-2014 |
20140363762 | TWO-COMPONENT DEVELOPING AGENT FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND METHOD FOR FORMING ELECTROPHOTOGRAPHIC IMAGE - A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom. | 12-11-2014 |
20150212443 | TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, TWO-COMPONENT DEVELOPER, AND METHOD FOR FORMING IMAGE - To provide a toner for electrostatic charge image development, a two-component developer, and a method for forming an image in which a high quality image can be stably obtained by suppression of a decrease in image density as caused by excessive electrification in a low temperature and low humidity environment, prevention of fogging as caused by lowered electrification property in a high temperature and high humidity environment, and suppression of a difference in image density. | 07-30-2015 |