Patent ID: 8666281
Filing Date: 2014-03-04
Classification: G03G

Abstract:
1. A developing device detachably mountable to a main assembly of an image forming apparatus, comprising: a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive member, said developing roller including an elastic roller portion and a core metal portion for supporting said roller portion; a developing device frame for rotatably supporting said developing roller; a developer layer thickness regulating member, contacting said roller portion of said developing roller, for regulating a layer thickness of a developer carried on said developing roller; and a movement preventing portion for preventing movement of said developing roller in an axial direction, wherein said movement preventing portion is detachably mounted in said developing device and is inserted into a spacing between an end portion of said core metal portion and an opposing portion of said developing device frame opposing the end portion of said core metal portion with respect to the axial direction of said developing roller, wherein said movement preventing portion is detached from said developing device when said developing roller develops the electrostatic latent image.