发明授权
- 专利标题: Image forming apparatus which back-transfers residual toner from an intermediate transfer member to a photosensitive drum
- 专利标题(中): 图像形成装置将残留调色剂从中间转印部件反向转印到感光鼓上
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申请号: US651858申请日: 1996-05-21
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公开(公告)号: US5809373A公开(公告)日: 1998-09-15
- 发明人: Yasuo Yoda , Katsuhiko Nishimura , Koichi Hiroshima , Shinichi Tsukida , Toru Kosaka
- 申请人: Yasuo Yoda , Katsuhiko Nishimura , Koichi Hiroshima , Shinichi Tsukida , Toru Kosaka
- 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: JPX7-123904 19950523; JPX7-159977 19950602; JPX7-159978 19950602
- 主分类号: G03G15/16
- IPC分类号: G03G15/16
摘要:
An image forming apparatus has an image bearing member; toner image forming unit for forming a toner image with non-magnetic toner on an image bearing member; intermediate transfer member contactable to the image bearing member and movable along an endless path; primary transfer unit for effecting primary image transfer of the toner image formed on the image bearing member onto the intermediate transfer member at a first transfer position; secondary transfer unit for effecting a secondary image transfer of the toner image from the intermediate transfer member on the transfer material at a second transfer position; and a residual toner charger for charging the residual toner remaining on the intermediate transfer member to a polarity opposite from a regular polarity thereof. After the secondary image transfer, the residual toner remaining on the intermediate transfer member is charged by the residual toner charger to the opposite polarity, and is then passed through the first transfer position during the primary image transfer, so that the residual toner is transferred back to the image bearing member substantially simultaneously with a next primary image transfer, thus removing the residual toner from the intermediate transfer member.