发明授权
- 专利标题: Magnetic seal for a developing apparatus
- 专利标题(中): 用于显影装置的磁性密封
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申请号: US727547申请日: 1991-07-09
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公开(公告)号: US5287148A公开(公告)日: 1994-02-15
- 发明人: Yuji Sakemi , Masahiro Itoh , Akira Watanabe
- 申请人: Yuji Sakemi , Masahiro Itoh , Akira Watanabe
- 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: JPX2-183172 19900710
- 主分类号: F16J15/43
- IPC分类号: F16J15/43 ; G03G15/08 ; G03G15/09 ; G03G15/06
摘要:
A developing apparatus for developing electrostatic images comprises a container for containing a developer comprising magnetic material. A rotatable member is provided which is rotatable in the container in contact with the developer, the rotatable member being supported on bearings. A stationary magnetic member is disposed out of position inside the container and adjacent to the bearing with a clearance from the rotatable member, the stationary member enclosing the rotatable member. The stationary member has first and second magnetic poles disposed adjacent to each other and having the same magnetic polarity to form a repelling magnetic field to form a magnetic brush of the developer in a clearance between the magnetic member and the rotatable member.