发明授权
US08521071B2 Developer bearing member, developing apparatus, and image forming apparatus
有权
显影剂承载部件，显影装置和图像形成装置
- 专利标题： Developer bearing member, developing apparatus, and image forming apparatus
- 专利标题（中）： 显影剂承载部件，显影装置和图像形成装置
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申请号： US12958351申请日： 2010-12-01
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公开(公告)号： US08521071B2公开(公告)日： 2013-08-27
- 发明人: Katsuhiko Nishimura , Yukihide Ushio , Masahiro Okuda , Toshihiko Sugimoto
- 申请人： Katsuhiko Nishimura , Yukihide Ushio , Masahiro Okuda , Toshihiko Sugimoto
- 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： Canon U.S.A., Inc., IP Division
- 优先权： JP2009-276832 20091204
- 主分类号： G03G15/08
- IPC分类号： G03G15/08
摘要：
A developer bearing member includes a base body, a surface layer, and a plurality of concave portions provided on the surface layer, wherein a resistance value of the surface layer is 102 Ω·cm to 108 Ω·cm, the number of the concave portions per unit area is 2250/mm2 to 12254/mm2, a major diameter of an opening of the concave portion is 8 μm to 20 μm, a depth of the concave portion is 2 μm to 5 μm, a dimensional tolerance of the major diameter is 0.5 μm or less, and a dimensional tolerance of the depth is 0.5 μm or less.
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