Patent ID: 7650104
Filing Date: 2010-01-19
Classification: G03G

Abstract:
1. A developing apparatus comprising: a developer carrying member that carries a mono-component developer; and a developer regulating member that abuts on the developer carrying member to regulate a thickness of a layer of the developer carried by the developer carrying member, wherein, surface roughness parameters of a surface of the developer carrying member satisfy the following equations (1) and (2), and at least at an abutment portion between the developer carrying member and the developer regulating member, surface roughness parameters of a surface of the developer regulating member satisfy the following equations (3) and (4), where, Sm is a mean spacing of profile irregularities [mm] specified in JIS-B0601-1994; Rpk is an initial wear height [μm] specified in DIN 4776; Rvk is an oil retaining depth [μm] specified in DIN 4776; Mr Pc