发明授权
- 专利标题: Carrier for electrophotography, two-component type developer, and image forming method
- 专利标题(中): 电子照相用载体,双组分型显影剂和成像方法
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申请号: US246146申请日: 1994-05-19
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公开(公告)号: US5512402A公开(公告)日: 1996-04-30
- 发明人: Kenji Okado , Toshiyuki Ugai , Ryoichi Fujita , Makoto Kanbayashi , Tsuyoshi Takiguchi , Yasuhiro Ichikawa , Wakashi Iida
- 申请人: Kenji Okado , Toshiyuki Ugai , Ryoichi Fujita , Makoto Kanbayashi , Tsuyoshi Takiguchi , Yasuhiro Ichikawa , Wakashi Iida
- 申请人地址: JPX 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: JPX Tokyo
- 优先权: JPX5-139925 19930520; JPX5-173583 19930622; JPX5-195309 19930713
- 主分类号: G03G9/09
- IPC分类号: G03G9/09 ; G03G9/097 ; G03G9/10 ; G03G9/107 ; G03G9/08
摘要:
A carrier for electrophotography has carrier particles. The carrier has a 50% average particle diameter (D.sub.50) of from 15 .mu.m to 45 .mu.m and contains from 1% to 20% of carrier particles with a size smaller than 22 .mu.m, not more than 3% of carrier particles with a size smaller than 16 .mu.m, from 2% to 15% of carrier particles with a size of 62 .mu.m or larger, and not more than 2% of carrier particles with a size of 88 .mu.m or larger. The carrier has a specific surface area S.sub.1 as measured by an air-permeability method and a specific surface area S.sub.2 as calculated by the following expression:S.sub.2 =(6/.rho..D.sub.50).times.10.sup.4wherein .rho. is a specific gravity of carrier; satisfying the following condition:1.2.ltoreq.S.sub.1 /S.sub.2 .ltoreq.2.0.
公开/授权文献
- US6064301A Roadway deviation prevention system 公开/授权日:2000-05-16