Patent ID: 7155137
Filing Date: 2006-12-26
Classification: G03G

Abstract:
1. A developing cartridge detachably mountable to a main assembly of an electrophotographic photosensitive member, said developing cartridge comprising: a developing roller, configured and positioned to develop an electrostatic latent image formed on an electrophotographic photosensitive member, having an elastic roller portion and a shaft portion supporting said elastic roller portion; a developer regulating member contactable to said elastic roller portion and configured and positioned to regulate the amount of the developer deposited on said elastic roller portion; and a protecting member including: wherein the width of contact between said portion to be sandwiched and said elastic roller portion when said portion to be sandwiched is sandwiched between said elastic roller portion and said developer regulating member, is larger than the width of contact between said developer regulating member and said elastic roller portion when said portion to be sandwiched is not sandwiched between said elastic roller portion and said developer regulating member, wherein when said protecting member is mounted between said elastic roller portion and said developer regulating member, said portion to be sandwiched contacts said elastic roller portion, and said supporting portion contacts said developer regulating member.