发明公开
EP1434104A2 Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography
审中-公开
磁性载体，双组分显影剂，显影方法，图像制作显影装置和电子照相设备
- 专利标题： Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography
- 专利标题（中）： 磁性载体，双组分显影剂，显影方法，图像制作显影装置和电子照相设备
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申请号： EP03029279.1申请日： 2003-12-22
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公开(公告)号： EP1434104A2公开(公告)日： 2004-06-30
- 发明人: Enoki, Shigekazu , Ariizumi, Osamu , Kurosu, Hisao , Namekata, Shinichi , Ozeki, Takamasa , Maruta, Takayuki , Yoneda, Takuji
- 申请人： Ricoh Company Ltd.
- 申请人地址： 3-6 Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP
- 专利权人： Ricoh Company Ltd.
- 当前专利权人： Ricoh Company Ltd.
- 当前专利权人地址： 3-6 Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP
- 代理机构： Schwabe - Sandmair - Marx
- 优先权： JP2002380935 20021227; JP2003051489 20030227
- 主分类号： G03G9/107
- IPC分类号： G03G9/107 ; G03G15/09
摘要：
A two-component developer including toner and magnetic carriers is provided. The two-component developer is
characterized in that when a development device including a developer bearing member bearing the two-component developer is operated under a development condition of an image forming apparatus using a quasi photoconductor in which a layer of tetrafluoroethylene resin is provided to a conductive material in 10µm thick, the number of times of light emission occurring in a magnetic brush formed on the developer bearing member due to partial conduction in the magnetic brush is 10 times or less per second at an observation cross section that is perpendicular relative to a rotation axis of the developer bearing member.
characterized in that when a development device including a developer bearing member bearing the two-component developer is operated under a development condition of an image forming apparatus using a quasi photoconductor in which a layer of tetrafluoroethylene resin is provided to a conductive material in 10µm thick, the number of times of light emission occurring in a magnetic brush formed on the developer bearing member due to partial conduction in the magnetic brush is 10 times or less per second at an observation cross section that is perpendicular relative to a rotation axis of the developer bearing member.
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