发明授权
- 专利标题： Developing roller with an identical polarity magnetic part
- 专利标题（中）： 显影辊具有相同的极性磁性部分
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申请号： US813845申请日： 1991-12-27
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公开(公告)号： US5206690A公开(公告)日： 1993-04-27
- 发明人: Tamotsu Shimizu , Hiroshi Murasaki , Masahiko Matsuura , Susumu Mikawa
- 申请人： Tamotsu Shimizu , Hiroshi Murasaki , Masahiko Matsuura , Susumu Mikawa
- 申请人地址： JPX Osaka
- 专利权人： Minolta Camera Kabushiki Kaisha
- 当前专利权人： Minolta Camera Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX3-1810 19910111; JPX3-255646 19911003
- 主分类号： G03G15/09
- IPC分类号： G03G15/09
摘要：
A developing device comprises a rotatable developing sleeve, a magnet member stationarily disposed inside the developing sleeve and a developer restricting member which restricts an amount of developer transported on a peripheral surface of the developing sleeve toward a developing region in accordance with rotation of the developing sleeve. The magnet member has a developing magnetic pole confronting the developing region, an identical polarity magnetic part which is provided between the developer restricting member and the developing magnetic pole and is formed of a plurality of adjacent magnetic poles of an identical polarity, and a magnetic pole which is provided between the identical polarity magnetic part and the developing magnetic pole for transporting the developer.
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