Invention Grant
- Patent Title: Charging device, process cartridge, and image forming apparatus
- Patent Title (中): 充电装置，处理盒和成像装置
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Application No.: US12299625Application Date: 2007-12-04
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Publication No.: US08126354B2Publication Date: 2012-02-28
- Inventor: Shuji Tanaka
- Applicant: Shuji Tanaka
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2006-327044 20061204
- International Application: PCT/JP2007/073745 WO 20071204
- International Announcement: WO2008/069339 WO 20080612
- Main IPC: G03G15/02
- IPC: G03G15/02
Abstract:
A charging device includes a charging roller and a cleaning roller configured to make contact with the charging roller. The cleaning roller is rotated following the charging roller. A dynamic friction coefficient of a surface of the charging roller measured by a Euler belt method is equal to or larger than 0.5.
Public/Granted literature
- US20090180794A1 CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS Public/Granted day:2009-07-16
Information query
