发明授权
- 专利标题： Charger, image forming apparatus, and charge control method
- 专利标题（中）： 充电器，成像设备和充电控制方法
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申请号： US11954762申请日： 2007-12-12
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公开(公告)号： US07639960B2公开(公告)日： 2009-12-29
- 发明人: Masaru Kobashi , Koji Migita , Masashi Nakatsu , Shinichi Kamoshida
- 申请人： Masaru Kobashi , Koji Migita , Masashi Nakatsu , Shinichi Kamoshida
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Hogan & Hartson LLP
- 优先权： JP2006-334498 20061212
- 主分类号： G03G15/02
- IPC分类号： G03G15/02
摘要：
A charger includes: a charging brush which is rotatably provided and is brought into contact with an image carrier to charge the surface of the image carrier; a charging roller which is brought into contact with the image carrier at a portion on the downstream side relative to the charging brush in the rotational direction of the image carrier to charge the surface of the image carrier; and a controller which controls voltages applied to the charging brush and charging roller, wherein the controller controls voltages applied to the charging brush and charging roller such that one-fifth of the absolute value of a charging brush current flowing between the image carrier and charging brush is lower than the absolute value of a charging roller current flowing between the image carrier and charging roller.
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