Charging member having a foamed layer of a material with specifi

Details Charging member having a foamed layer of a material with specifi Charging member having a foamed layer of a material with specifi

1994-04-28

1996-08-06

Pendegrass, Joan H.

Photocopying

Contact printing

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361225, G03G 1502

Patent

active

055438997

ABSTRACT:
A charging member for charging a member to be charged includes a foamed layer; a supporting member for supporting the foamed layer, and for being supplied with a voltage; a resistance layer closer to the member to be charged than the foamed layer; wherein the foamed layer has a specific gravity not less than 0.1 (g/cm.sup.3) and not more than 0.6 (g/cm.sup.3), and wherein an average outer diameter of pores in a cross-section of said foamed layer is not less than 50 microns and not more than 1 mm.

REFERENCES:
patent: 4823689 (1989-04-01), Kishino et al.
patent: 5390007 (1995-02-01), Kugoh et al.

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