Conductive member, process cartridge using conductive member...

Electrophotography – Image formation – Charging

Reexamination Certificate

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Reexamination Certificate

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07734221

ABSTRACT:
The present invention provides a conductive member10with a superior durability by controlling an electric resistance value of an electric resistance adjusting layer2within a semi conductive range, preventing an ion conductive material from bleeding out of the electric resistance adjusting layer2to avoid improper charging and avoiding strength decreasing of a weld portion of the electric resistance adjusting layer and an electric resistance value fluctuation. The electric resistance adjusting layer2is made from a resin composition prepared by melting and kneading a thermoplastic resin, a high molecular ion conductive material containing an alkali metal salt and a graft copolymer which has an affinity for both the thermoplastic resin and the high molecular ion conductive material.

REFERENCES:
patent: 2005/0100365 (2005-05-01), Narita et al.
patent: 2005/0175374 (2005-08-01), Kosuge
patent: 2006/0188293 (2006-08-01), Narita et al.
patent: 2006/0270541 (2006-11-01), Narita et al.
patent: 3-240076 (1991-10-01), None
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patent: 2001082451 (2001-03-01), None
patent: 2002-132019 (2002-05-01), None
patent: 2005-17767 (2005-01-01), None
patent: 2005-91818 (2005-04-01), None
patent: 2006-113444 (2006-04-01), None
U.S. Appl. No. 11/837,751, filed Aug. 13, 2007, Nakamura, et al.
U.S. Appl. No. 11/836,950, filed Aug. 10, 2007, Tokuwaki, et al.
U.S. Appl. No. 11/854,947, filed Sep. 13, 2007, Oshima, et al.

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