发明授权
- 专利标题： Developing unit and image forming device
- 专利标题（中）： 显影单元和成像装置
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申请号： US12352094申请日： 2009-01-12
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公开(公告)号： US08010025B2公开(公告)日： 2011-08-30
- 发明人: Hiroyuki Hamakawa , Akihiro Watanabe , Masashi Fujishima , Hiroshi Yamazaki , Asami Kotera , Sayo Uemura
- 申请人： Hiroyuki Hamakawa , Akihiro Watanabe , Masashi Fujishima , Hiroshi Yamazaki , Asami Kotera , Sayo Uemura
- 申请人地址： JP
- 专利权人： Kyocera Mita Corporation
- 当前专利权人： Kyocera Mita Corporation
- 当前专利权人地址： JP
- 代理机构： Ostrolenk Faber LLP
- 优先权： JP2008-005936 20080115
- 主分类号： G03G15/08
- IPC分类号： G03G15/08
摘要：
A developing unit includes a developing roller which rotates about a rotational axis to supply toner to a photoreceptor, the developing roller including: a cylindrical core portion which includes an electric conductor; a first resistive layer which covers a cylindrical surface of the core portion; a second resistive layer which covers the first resistive layer, and has electric-resistivity lower than that of the first resistive layer; and a current leakage control member which prevents leakage of electric current from the core portion toward the second resistive layer through an end of the developing roller along a direction of the rotational axis.
公开/授权文献
- US20090180818A1 DEVELOPING UNIT AND IMAGE FORMING DEVICE 公开/授权日：2009-07-16