Patent application number | Description | Published |
20110183080 | PROCESS FOR PRODUCING ROLLER FOR ELECTROPHOTOGRAPHY - An object of the present invention is to provide a production process of a roller for an electrophotography, having a surface layer the electric resistance of which has been controlled by corona discharge treatment while keeping any pinholes from coming about on the surface. A production process of a roller for an electrophotography, said roller comprising a conductive mandrel and a conductive surface layer comprising a resin and carbon black dispersed in the resin, the process having the following steps (1) to (3):
| 07-28-2011 |
20120091608 | PROCESS FOR PRODUCING REGENERATED ELASTIC ROLLER - There is provided a process for producing a regenerated elastic roller which can be again used for the formation of high-quality electrophotographic images by sufficiently relaxing a compression set of the elastic roller having the compression set caused in an elastic layer in usage. The process for producing a regenerated elastic roller includes a step of heating an elastic roller having a conductive mandrel and an elastic layer and having a compression set caused in the elastic layer, in a cylindrical mold to thermally expand the elastic layer and to cause a surface of the elastic roller to contact an inner wall of the cylindrical mold. | 04-19-2012 |
20130164038 | DEVELOPING MEMBER AND PRODUCTION METHOD THEREFOR, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - Provided is a developing member capable of suppressing occurrence of compression set. The developing member comprises a substrate; an elastic layer provided on the substrate; and a coating layer provided on the elastic layer, wherein the elastic layer contains a cured substance of a mixture containing the following (A) to (D): (A) organopolysiloxane having two or more vinyl groups bonded to a silicon atom in one molecule and having a viscosity at 25° C. of 10 Pa·s or more and 100 Pa·s or less; (B) organopolysiloxane including constituent units of SiO | 06-27-2013 |
20130223892 | DEVELOPING MEMBER - Provided is a developing roller including elastic layer and resin layer adhered to each other and having an appropriately resistance, thereby suppressing fogging. The developing member comprises a mandrel; an elastic layer; and a resin layer, wherein: the resin layer comprises polyurethane resin obtained by isocyanate and polyol; and the elastic layer includes cured silicone rubber composition comprising (a)-(d):
| 08-29-2013 |
20130266339 | ELECTRO-CONDUCTIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is an electro-conductive member showing small unevenness of the residual state of charge. The electro-conductive member is an electro-conductive member, comprising: a substrate whose surface is electro-conductive; and an electro-conductive elastic layer provided on the substrate, wherein the elastic layer is obtained by curing a mixture containing the following (A) to (D): (A) an organopolysiloxane having at least two vinyl groups bonded to a silicon atom; (B) an organopolysiloxane represented by the following chemical structural formula (1); (C) a hydrogen polysiloxane having at least two hydrosilyl groups; and (D) carbon black (l, m, and n in the chemical structural formula (1) each independently represent a positive integer). | 10-10-2013 |
20130279937 | DEVELOPING MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - Provided is a developing member capable of suppressing a variation in resistance even when exposed to a high-temperature, high-humidity environment for a long time period. The developing member comprises: a mandrel; an electro-conductive elastic layer provided on a periphery of the mandrel; and a surface layer provided on a surface of the elastic layer, wherein: the elastic layer contains a dimethyl silicone rubber and carbon black; and an amount α of a hydrogen atom bound to a silicon atom of the dimethyl silicone rubber, and an amount β of a hydrogen atom of methyl groups bound to a silicon atom of the dimethyl silicone rubber, satisfy a relationship of 2.5×10 | 10-24-2013 |
20140064792 | DEVELOPING UNIT AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - Provided are a developing unit alleviating fogging occurrence and an electrophotographic image forming apparatus providing images over long periods. The developing unit comprises at least toner ( | 03-06-2014 |
20140064797 | DEVELOPING MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - A high-quality developing member which excels in filming resistance and excels in leak resistance despite high electroconductivity is provided. The developing member includes an electroconductive substrate, an elastic layer formed on the substrate, and a surface layer which covers a surface of the elastic layer. The surface layer includes a first resin which has, between two adjacent urethane linkages, a structure represented by the structural formula (1) and one or both of structures selected from the group consisting of a structure represented by the structural formula (2) and a structure represented by the structural formula (3), a second resin which has a structure represented by the structural formula (4) and one or both of structures selected from the group consisting of a structure represented by the structural formula (5) and a structure represented by the structural formula (6), and an electronically conductive filler. | 03-06-2014 |
20140072350 | DEVELOPING MEMBERINCLUDING ELASTIC MEMBER CONTAINING CURED PRODUCT OF ADDITION -CURING SILICONE RUBBER MIXTURE. PROCESSING CARTRIDGE INCLUDING THE DEVELOPING MEMBER, AND ELECTROPHOTOGRAPHIC APPARATUS INCLUDING THE DEVELOPING MEMBER - A developing roller includes: a mandrel; an elastic layer provided for an outer periphery of the mandrel, the elastic layer including an addition-curing silicone rubber; and a surface layer provided for an outer periphery of the elastic layer, in which: the elastic layer includes a compound represented by the following formula (1); when the content of such a compound that n in the formula (1) represents an integer of 3 to 12 in the elastic layer is represented by P1, and the content of such a compound that n in the formula (1) represents an integer of 13 to 20 in the elastic layer is represented by P2, P1+P2 is 5,000 ppm by mass to 12,000 ppm by mass; and P1 is 1,500 ppm by mass to 6,000 ppm by mass (In the formula (1), n represents an integer of 3 to 20): | 03-13-2014 |