发明申请
- 专利标题： CHARGING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
- 专利标题（中）： 充电装置，过程盒和图像形成装置
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申请号： US11276257申请日： 2006-02-21
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公开(公告)号： US20060188292A1公开(公告)日： 2006-08-24
- 发明人: Kohei Matsuda , Tetsuya Kobayashi , Masato Koyanagi , Shinichi Agata , Shinya Yamamoto , Kentarou Kawata , Taku Watanabe
- 申请人： Kohei Matsuda , Tetsuya Kobayashi , Masato Koyanagi , Shinichi Agata , Shinya Yamamoto , Kentarou Kawata , Taku Watanabe
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 优先权： JP045457/2005 20050222; JP039570/2006 20060216
- 主分类号： G03G15/02
- IPC分类号： G03G15/02
摘要：
A charging device for electrically charging an image bearing member, includes a contact charging member contactable to the image bearing member to charge the image bearing member, the contact charging member being supplied only with a DC voltage; and a contact member contacted to the charging member, wherein the image bearing member is adapted to carry a toner image of toner which contains an externally added material comprising silica, wherein work functions of the charging member, the contact member and the silica satisfy, (the work function of the contact member)>(the work function of the silica)>(the work function of the charging member).
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