发明授权
US5450180A Image forming apparatus having constant current and voltage control in
the charging and transfer regions
失效
图像形成装置在充电和转印区域中具有恒定的电流和电压控制
- 专利标题： Image forming apparatus having constant current and voltage control in the charging and transfer regions
- 专利标题（中）： 图像形成装置在充电和转印区域中具有恒定的电流和电压控制
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申请号： US240212申请日： 1994-05-09
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公开(公告)号： US5450180A公开(公告)日： 1995-09-12
- 发明人: Yukihiro Ohzeki , Koichi Hiroshima , Junji Araya , Yasushi Sato , Toshio Miyamoto , Kimio Nakahata
- 申请人： Yukihiro Ohzeki , Koichi Hiroshima , Junji Araya , Yasushi Sato , Toshio Miyamoto , Kimio Nakahata
- 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： JPX63-276106 19881102; JPX63-276107 19881102
- 主分类号： G03G15/16
- IPC分类号： G03G15/16
摘要：
An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a charging member disposed opposed to the image bearing member; and bias application device for applying a bias voltage to the charging member, wherein the bias applying device effects a constant voltage control to the charging member when an image area of the image bearing member is in a charging region of the charging member, and effects a constant current control during at least a part of a period in which an area of the image bearing member other than the image area is in the charging region, and wherein a level of a constant voltage of the constant voltage control is determined during the constant current control.
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