Patent application number | Description | Published |
20080267641 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND DEVELOPMENT ERROR DETECTING METHOD - A disclosed developing device includes a developing roller; a supply roller that is in contact with the developing roller and configured to supply toner to the developing roller; a current measuring unit configured to measure an electric current that flows from the developing roller to the supply roller when the toner is supplied from the supply roller to the developing roller; and an error determining unit configured to detect a development error of the developing roller based on the electric current measured by the current measuring unit. | 10-30-2008 |
20080280225 | IMAGE DEVELOPING METHOD, IMAGE DEVELOPING DEVICE, AND IMAGE FORMING DEVICE - An image developing method is disclosed that is able to efficiently remove degraded toner on a developing agent carrier, prevent formation of abnormal images, ensure good image quality over time, and increase the service life of the device. The developing method includes a step of calculating an amount of consumption of the developing agent during image formation and an amount of consumption of the developing agent in a compulsory toner consumption mode under different calculation conditions between the image formation and the compulsory toner consumption mode. In the compulsory toner consumption mode, a developing bias different from a developing bias used during image formation is applied for a predetermined time period to discharge residual developing agent on a developing agent carrier to a latent image carrier. | 11-13-2008 |
20090208252 | Developing device for image forming apparatus and process cartridge having the same - A developing device that can reliably supply toner from a toner supply roller to a developing roller and that does not generate scraping irregularities in the toner thin layer on the developing roller, and a process cartridge and an image forming apparatus having the same. The developing device has: a toner supply chamber; a developing roller provided in the toner supply chamber; a toner supply roller provided in the toner supply chamber for supplying toner to the developing roller; and a layer regulation member for forming the toner on the developing roller into a thin layer, and develops electrostatic latent images on an image carrier by applying bias voltage to the developing roller. An intermediate contact member is interposed between the developing roller and the toner supply roller. The intermediate contact member is a sheet member fixed at one end, and the free end of the sheet member is interposed between the developing roller and the toner supply roller, with the free end side protruding therebetween. | 08-20-2009 |
20100028057 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing device develops an electrostatic latent image formed on an image carrier with toner. The developing device includes a developer carrier, a developer supplying unit that supplies a developer on the developer carrier, a layer shaping member that shapes the developer supplied on the developer carrier into a thin layer, and an electric-field control member that is arranged downstream of a shaping nip formed between the developer carrier and the layer shaping member and that controls an intensity of an electric field generated between the developer carrier and the layer shaping member. | 02-04-2010 |
20110243616 | IMAGE DEVELOPER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An image developer, including a developer container containing a developer developing a latent image on a latent image bearer; a developer bearer bearing the developer, located close to or contacting the latent image bearer; and a developer feeding and collection roller feeding the developer onto the developer bearer and scraping the developer therefrom, rotating while contacting thereto with pressure, wherein the developer feeding and collection roller includes an inner layer formed of an electroconductive foamed rubber; and an outer layer formed of an insulative foamed rubber, and wherein the following relationship is satisfied: | 10-06-2011 |
20110249994 | CONDUCTIVE COMPOSITION, ELECTROPHOTOGRAPHIC BELT, IMAGE FORMING APPARATUS, AND METHOD OF MANUFACTURING CONDUCTIVE COMPOSITION - A conductive composition including a matrix resin comprising a thermoplastic resin, a conductive agent comprising a carbon black having an amine value of 1 to 100 mgKOH/g, and a stiffening agent comprising an acid anhydride, a carboxylic acid, or a compound having an epoxy group. | 10-13-2011 |
20120237270 | DEVELOPING ROLLER - A developing roller including: an electrically-conductive base; an elastic layer formed on an outer circumference of the electrically-conductive base; and a toner bearing layer formed on the elastic layer, wherein the toner bearing layer contains a polyurethane resin having an isocyanurate structure, and wherein the polyurethane resin has a ratio A/B of 1.0 to 10.0 where A denotes absorbance attributed to C═O of cyanurate and B denotes absorbance attributed to C═O of urethane in an infrared absorption spectrum of the polyurethane resin obtained by an ATR method. | 09-20-2012 |
20130136508 | DEVELOPING APPARATUS, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - To provide a developing apparatus, including: a developer bearing member which carries a one-component developer; a charge imparting member disposed in contact with the developer bearing member and charges the one-component developer on the developer bearing member; and a bias supplying member which supplies a bias voltage to the charge imparting member, wherein the one-component developer has a volume resistivity of 8.0 logΩ·cm to 10.9 logΩ·cm, and the developing apparatus satisfies: | 05-30-2013 |