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1. 发明授权

US5596394A Charging apparatus for charging a photo-sensitive member by magnetically holding magnetic particles in a charging zone 失效
标题翻译：充电装置，用于通过在充电区中磁性地保持磁性颗粒来对感光构件进行充电
公开(公告)号：US5596394A
公开(公告)日：1997-01-21
申请号：US245281
申请日：1994-05-18
申请人： Yasuo Nishiguchi , Susumu Kikuchi , Ryushi Imoo , Sigeki Tsukahara , Shinji Yamane
发明人： Yasuo Nishiguchi , Susumu Kikuchi , Ryushi Imoo , Sigeki Tsukahara , Shinji Yamane
IPC分类号： G03G15/02 , G03G15/01
CPC分类号： G03G15/0241 , G03G2215/022
摘要： A particle charging apparatus for charging a photo-sensitive drum by magnetically holding magnetic particles in a charging zone and impressing a charging bias on the magnetic particles. Adjacent to an opposed pole which is disposed on the back side of the photo-sensitive drum on the charging zone upstream side for forming a vertical magnetic field, an opposite polarity magnet or magnetic member is disposed such that a mainly horizontal magnetic field is formed on the drum by the opposed and adjacent poles. A vertical magnetic field is formed on the charging zone downstream side by a main pole and the opposed pole. A non-magnetic sleeve with the main pole therein is rotated in the direction opposite that of the drum, thus causing magnetic particles in the vertical magnetic field to be circulated toward the charging zone upstream side. Leakage and spattering of magnetic particles out of the charging zone is effectively prevented by simple construction, and stable charging is permitted even with a reduced photo-sensitive drum size or with assembling errors of a charging sleeve or the like.
摘要翻译：一种粒子充电装置，用于通过在充电区中磁性地保持磁性颗粒并对磁性颗粒施加充电偏压来对感光鼓进行充电。与位于充电区上游侧的用于形成垂直磁场的感光鼓的背侧上的相对的极相邻，设置相反极性的磁体或磁性构件，使得主要水平的磁场形成在鼓由相对和相邻的杆组成。通过主极和相对的极在充电区下游侧形成垂直磁场。其中具有主极的非磁性套筒沿与鼓的方向相反的方向旋转，从而使垂直磁场中的磁性粒子朝向充电区上游侧循环。通过简单的结构有效地防止了磁性颗粒从充电区域的泄漏和飞溅，即使减小了感光鼓尺寸或充电套筒等的装配误差，也允许稳定的充电。

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