发明授权
- 专利标题: Developing roller, developing apparatus using the same, and image forming apparatus
- 专利标题(中): 显影辊,使用其的显影装置和图像形成装置
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申请号: US12061385申请日: 2008-04-02
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公开(公告)号: US07570905B2公开(公告)日: 2009-08-04
- 发明人: Takashi Kusaba , Ryota Kashiwabara , Minoru Nakamura
- 申请人: Takashi Kusaba , Ryota Kashiwabara , Minoru Nakamura
- 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: JP2006-275524 20061006
- 主分类号: G03G15/08
- IPC分类号: G03G15/08
摘要:
A developing roller having an elastic layer on the outer periphery of a mandrel and having a surface layer containing a resin and resin particles on its outer periphery, wherein the surface layer has a convex portion attributable to the resin particles, and has a surface of roughness in which a distortion degree Rsk of a roughness curve is 0.15 or more and 0.70 or less, wherein the resin particles have a peak P1 at a particle diameter d1 in a volume particle size distribution, and wherein “a”, “b”, “c”, d1, d2 and d3 satisfy a specific relationship, where, “a” denotes a volume fraction of the resin particle having the particle diameter d1 in the volume particle size distribution, and “b” and “c” denote volume fractions at particle diameters d2 and d3 respectively in the volume particle size distribution.