Charging member, charging apparatus and image forming apparatus

Details Charging member, charging apparatus and image forming apparatus Charging member, charging apparatus and image forming apparatus

2005-04-19

2005-04-19

Braun, Fred L. (Department: 2852)

Electrophotography

Image formation

Charging

C399S174000

Reexamination Certificate

active

06882814

ABSTRACT:
A charging member electrically charges a member to be charged in a state that said charging member forms a nip with the member to be charged and electroconductive particles are present at the nip. The charging member includes an elastic foam member provided at a surface of said charging member. The elastic foam member includes cell portions and cell wall portions defining the cell portions. The cell wall portions have a thickness proportion to the cell portions of not less than 2% and not more than 40%.

REFERENCES:
patent: 6023597 (2000-02-01), Mayuzumi et al.
patent: 6128456 (2000-10-01), Chigono et al.
patent: 6343199 (2002-01-01), Kodama
patent: 6393243 (2002-05-01), Satoh et al.
patent: 20020197082 (2002-12-01), Hosokawa et al.
patent: 1 094 370 (2001-04-01), None
patent: 1 251 409 (2002-10-01), None
patent: 2000-81763 (2000-03-01), None

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