摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a developing device making an image uniform by a simple configuration, also to prevent a decrease in productivity in the manufacture of a developing device, to suppress peeling of an elastic layer from the lengthwise ends of a supply roller, and thereby to effectively preventing nonuniform image resulting from peeling of the elastic layer, and also to provide a process cartridge using the developing device. <P>SOLUTION: The developing device 10 has: a developer carrier 21 for carrying developer on its peripheral face; a supply roller 22 for supplying developer to the outer peripheral face of the developer carrier 21; a layer thickness regulating member 23; and a developing case 24. In the developing device 10, the supply roller 22 includes: a roller shaft 22a; an adhesive layer 22b formed on the roller shaft 22a; and an elastic layer 22c formed on the adhesive layer 22b. The surface of the elastic layer 22c has a step m so that the outside diameterΦ1 of each end in the lengthwise direction X of the roller is smaller than the outside diameterΦ2 of the middle of the roller 22. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |