DEVELOPING ROLLER, MANUFACTURING METHOD OF DEVELOPING ROLLER, DEVELOPING DEVICE, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a flexible developing roller that has excellent compressive permanent set and durability, and reduced density unevenness, as well as a manufacturing method of a developing roller, a developing device, an electrophotographic process cartridge, and an electrophotographic image forming apparatus.;SOLUTION: A developing roller includes a conductive core body, an elastic layer, and a surface layer; the elastic layer is formed by continuously winding portions not containing foam cells in a spiral pattern from the conductive core body to the outer peripheral surface of the elastic layer.;COPYRIGHT: (C)2012,JPO&INPIT