发明授权
- 专利标题： Charging apparatus, process cartridge and image forming apparatus
- 专利标题（中）： 充电设备，处理盒和成像设备
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申请号： US10140982申请日： 2002-05-09
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公开(公告)号： US06788911B2公开(公告)日： 2004-09-07
- 发明人: Harumi Ishiyama , Yasunori Chigono , Jun Hirabayashi
- 申请人： Harumi Ishiyama , Yasunori Chigono , Jun Hirabayashi
- 优先权： JP2001-138414 20010509
- 主分类号： G03G1502
- IPC分类号： G03G1502
摘要：
A charging device includes a charging member for electrically charging a member to be charged which is adapted to form a nip with a member to be charged which has a surface layer having a volume resistivity of 1×109-1×1014 &OHgr;cm, said charging member having an elastic member and movable with a peripheral speed difference relative to the member to be charged; and electroconductive particles carried on said charging member to the nip, wherein a peripheral speed Vd (mm/sec) of said member to be charged, a peripheral speed Vc (mm/sec) of said charging member, a width N (mm) of the nip measured in a moving direction of said charging member, and a coverage ratio Rc of said electroconductive particles on said charging member, satisfy: N·Rc·|Vc−Vd|/Vd≧1.