发明授权
- 专利标题： Charging roller, process cartridge and electrophotographic apparatus
- 专利标题（中）： 充电辊，处理盒和电子照相设备
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申请号： US12704818申请日： 2010-02-12
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公开(公告)号： US07835669B2公开(公告)日： 2010-11-16
- 发明人: Takumi Furukawa , Tomohito Taniguchi , Hidekazu Matsuda , Yusuke Yagisawa
- 申请人： Takumi Furukawa , Tomohito Taniguchi , Hidekazu Matsuda , Yusuke Yagisawa
- 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
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2008-281599 20081031
- 主分类号： G03G15/02
- IPC分类号： G03G15/02
摘要：
The present invention provides a charging roller having a stable chargeability and capable of preventing occurrence of “fogging” on an electrophotographic image. The invention relates to a contact-charging type charging roller which includes a conductive support and a surface layer. The surface layer contains a binder, resin particles containing a carbon black dispersed in the binder, and graphitized particles dispersed in the binder; and the surface layer has, on its surface, convex portions derived from the resin particles, and convex portions derived from the graphitized particles. These convex portions have a specific relationship.