发明申请
US20070201910A1 Pretransfer charging device and image forming apparatus including same
有权
预传输充电装置和包括其的图像形成装置
- 专利标题: Pretransfer charging device and image forming apparatus including same
- 专利标题(中): 预传输充电装置和包括其的图像形成装置
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申请号: US11704388申请日: 2007-02-09
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公开(公告)号: US20070201910A1公开(公告)日: 2007-08-30
- 发明人: Toshiaki Kagawa , Hideki Ohnishi , Hiroshi Kida , Yoshiaki Masuda
- 申请人: Toshiaki Kagawa , Hideki Ohnishi , Hiroshi Kida , Yoshiaki Masuda
- 申请人地址: JP Osaka
- 专利权人: SHARP KABUSHIKI KAISHA
- 当前专利权人: SHARP KABUSHIKI KAISHA
- 当前专利权人地址: JP Osaka
- 优先权: JP2006-35786 20060213; JP2006-51122 20060227; JP2006-355593 20061228; JP2006-355594 20061228
- 主分类号: G03G15/16
- IPC分类号: G03G15/16
摘要:
The present invention is made to provide a pretransfer charging device, which allows (i) reduction of generation of discharge products such as ozone and nitroxide, (ii) excellent uniform charging, (iii) continuous stable charging for a long period of time, and (iv) restraint of distortion of a toner image. The pretransfer charging device includes (i) ion generation needles each provided face to face with an image carrier such as a photoconductor drum or an intermediating transfer belt, and (ii) a high-voltage power supply for applying a negative voltage to each of the ion generation needles. The voltage to be applied from the high-voltage power supply is not less than an ion production threshold voltage but is less than a corona discharge threshold voltage. With this, no corona discharge occurs but negative ions can be generated. This makes it possible to solve various problems caused due to the corona discharge.