Charging device having charging roller with specific...

Details Charging device having charging roller with specific... Charging device having charging roller with specific...

2011-04-26

2011-04-26

Gray, David M (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S175000, C399S176000

Reexamination Certificate

active

07933533

ABSTRACT:
A charging device for charging an image supporting member includes a charging roller for charging the image supporting member; and a cleaning member for cleaning the surface of the charging roller. The charging roller has a surface, and the surface has irregularity oriented in a direction opposite to a direction that the cleaning member slides against the charging roller. Further, the surface has a maximum peak height Rp within a range of 2 μm≦Rp≦10 μm, and an average profile length RSm within a range of 40 μm≦RSm≦200 μm.

REFERENCES:
patent: 5610691 (1997-03-01), Takahashi et al.
patent: 6263175 (2001-07-01), Sawada et al.
patent: 2005/0226659 (2005-10-01), Ebe
patent: 2000-172055 (2000-06-01), None
patent: 2001-042608 (2001-02-01), None
patent: 2001-290340 (2001-10-01), None
patent: 2003-207966 (2003-07-01), None

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