Patent ID: 8583001
Filing Date: 2013-11-12
Classification: G03G

Abstract:
1. A developing device comprising: a developing container, provided with an opening, for containing a developer; a developing roller, provided at said opening, for forming a developer image on an image bearing member; a seal member, provided at said opening along an end portion of said developing roller, for preventing toner leakage from a gap between said opening and said developing roller; and a developer supplying roller, including a core material and a cylindrical elastic member that is provided around said core material and is contacted to said developing roller, for supplying the developer to said developing roller, wherein said cylindrical elastic member has an end surface and a central portion with respect to a longitudinal direction thereof, and wherein said end surface has an outer diameter that is smaller than that of said central portion so as to not be in contact with said seal member, and wherein said end surface is contacted to an inner wall of said developing container.