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US 2009/0214272 A1Published application
Developing device and image forming apparatus
AssigneeOki Data Corporation
InventorSatoru Furuya
Life of this patent
Estimating the term…
Abstract
A developing device includes a developer supporting member for supporting developer and a developer charging member disposed to face the developer supporting member for charging and supplying the developer to the developer supporting member. The developer supporting member has a surface having a calculated average surface roughness Ra between 0.1 μm and 0.6 μm and a surface free energy SFE between 15 mN/m and 26 mN/m. Further, the developer charging member has an Asker F hardness Haf between 24° and 56°.
Claims10
A developing device comprising:
- a developer supporting member for supporting developer, said developer supporting member including a surface having a calculated average surface roughness Ra between 0.1 μm and 0.6 μm and a surface free energy SFE between 15 mN/m and 26 mN/m;
- and
- a developer charging member disposed to face the developer supporting member for charging and supplying the developer to the developer supporting member, said developer charging member having an Asker F hardness Haf between 24° and 56°.
Dependencies are inferred from the claim text.