Charging roller, process cartridge and electrophotographic...

Details Charging roller, process cartridge and electrophotographic... Charging roller, process cartridge and electrophotographic...

2007-01-30

2007-01-30

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Charging

Reexamination Certificate

active

10808479

ABSTRACT:
A charging roller for a contact charging assembly is provided including a conductive substrate, an elastic layer which covers the periphery of the conductive substrate, and a seamless tube externally so fitted as to cover the periphery of the elastic layer. The seamless tube constitutes a surface layer of the charging roller, and the charging roller has a surface of 3.0 μm or less in ten-point average roughness (Rz jis 94) and 0.10 mm or less in roughness curve average length (RSm).

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