Invention Grant
- Patent Title: Conductive member, process cartridge using conductive member and image formation apparatus using process cartridge
- Patent Title (中): 导电部件,使用导电部件的处理盒和使用处理盒的成像装置
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Application No.: US11620365Application Date: 2007-01-05
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Publication No.: US07734221B2Publication Date: 2010-06-08
- Inventor: Tadayuki Oshima , Hiroki Furubayashi , Taisuke Tokuwaki , Tadaaki Hattori , Toshio Kojima , Makoto Nakamura , Yutaka Narita
- Applicant: Tadayuki Oshima , Hiroki Furubayashi , Taisuke Tokuwaki , Tadaaki Hattori , Toshio Kojima , Makoto Nakamura , Yutaka Narita
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2006-011276 20060119
- Main IPC: G03G15/02
- IPC: G03G15/02

Abstract:
The present invention provides a conductive member 10 with a superior durability by controlling an electric resistance value of an electric resistance adjusting layer 2 within a semi conductive range, preventing an ion conductive material from bleeding out of the electric resistance adjusting layer 2 to 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 layer 2 is 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.
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