发明授权
US4954404A Developing method and device and color image forming method and
apparatus using same
失效
显影方法和装置以及使用其的彩色图像形成方法和装置
- 专利标题: Developing method and device and color image forming method and apparatus using same
- 专利标题(中): 显影方法和装置以及使用其的彩色图像形成方法和装置
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申请号: US251780申请日: 1988-10-03
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公开(公告)号: US4954404A公开(公告)日: 1990-09-04
- 发明人: Masahiro Inoue , Hatsuo Tajima , Yuji Sakemi , Kenji Okado
- 申请人: Masahiro Inoue , Hatsuo Tajima , Yuji Sakemi , Kenji Okado
- 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: JPX62-252046 19871005
- 主分类号: G03G15/01
- IPC分类号: G03G15/01 ; G03G13/01 ; G03G13/09
摘要:
A method of reverse development for depositing the toner particles to the light potential area of a photosensitive member. The developer used contains magnetic carrier particles and toner particles. An alternating electric field is formed in the developing position or zone. A relative volumetric ratio Q (%) of the magnetic carrier particles in the developing position satisfies 15.0.ltoreq.Q.ltoreq.28.0. The relative volumetric ratio is defined asQ=(M/h).times.(1/.rho.).times.C.sigma./(T+C)where M (g/cm.sup.2) is an amount of applied developer on a developing sleeve surface per unit area, h (cm) is a height of space in the developing position, .rho. (g/cm.sup.3) is a true density of the magnetic carrier particles, C/(T+C) (%) is a weight ratio of the carrier particles in the developer on the surface of the sleeve, and .sigma. is a ratio of a peripheral speed of the sleeve relative to the peripheral speed of the photosensitive member.