发明授权
- 专利标题： Electrophotographic apparatus, process cartridge and electrophotographic photosensitive member unit
- 专利标题（中）： 电子照相设备，处理盒和电子照相感光元件单元
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申请号： US10842488申请日： 2004-05-11
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公开(公告)号： US07071962B2公开(公告)日： 2006-07-04
- 发明人: Atsushi Fujii , Masato Tanaka , Ryuji Higashi
- 申请人： Atsushi Fujii , Masato Tanaka , Ryuji Higashi
- 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： JP2002-349401 20021202
- 主分类号： B41J2/435
- IPC分类号： B41J2/435
摘要：
An electrophotographic apparatus has a beam spot made to have a small spot diameter by the use of a laser having an oscillation wavelength within the range of from 380 nm to 450 nm, and enables image reproduction at ultra-high resolution and with ultra-high image quality. The apparatus includes I) an electrophotographic photosensitive member unit having i) an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support and ii) fitting members fitted to the end portions of the electrophotographic photosensitive member, and II) an exposure device having a laser having an oscillation wavelength within the range of from 380 nm to 450 nm, and in which a spot diameter Di (μm) of a beam spot formed on the surface of the electrophotographic photosensitive member by a laser beam emitted from the laser is 40 μm or less, and the cylinder deflection De (μm) of the electrophotographic photosensitive member unit is 1.5 times or less the spot diameter Di (μm) of the beam spot.