Patent ID: 7336913
Filing Date: 2008-02-26
Classification: G03G

Abstract:
1. A developing apparatus comprising: a case having a slit-shaped opening; a developer retainer which is arranged along a longitudinal direction of the opening and supported by the case so as to be rotatable; and a pressing member, which is arranged at the opening of the case, for pressing a first sealing member and a second sealing member, wherein the first sealing member has a first elastic modulus and is arranged at the opening of the case and interposed between the pressing member and the case while being compressed by a first compressibility, and the second sealing member has a second elastic modulus smaller than the first elastic modulus and is arranged adjacent to the first sealing member at the opening of the case and interposed between the pressing member and the case while being compressed by a second compressibility larger than the first compressibility.