发明授权
US08538310B2 Image transfer apparatus, image fixing apparatus, and registration apparatus which prevent a load torque variation upon entry or exit of a sheet into a nipping portion
有权
图像转印装置，图像定影装置和登记装置，其防止片材进入夹持部分的进入或退出时的负载扭矩变化
- 专利标题： Image transfer apparatus, image fixing apparatus, and registration apparatus which prevent a load torque variation upon entry or exit of a sheet into a nipping portion
- 专利标题（中）： 图像转印装置，图像定影装置和登记装置，其防止片材进入夹持部分的进入或退出时的负载扭矩变化
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申请号： US12222348申请日： 2008-08-07
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公开(公告)号： US08538310B2公开(公告)日： 2013-09-17
- 发明人: Hiromichi Matsuda , Toshiyuki Andoh , Takashi Hashimoto , Takashi Hodoshima , Tatsuhiko Oikawa , Hidetaka Noguchi , Seiji Hoshino , Makoto Komatsu
- 申请人： Hiromichi Matsuda , Toshiyuki Andoh , Takashi Hashimoto , Takashi Hodoshima , Tatsuhiko Oikawa , Hidetaka Noguchi , Seiji Hoshino , Makoto Komatsu
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Harness, Dickey & Pierce, P.L.C.
- 优先权： JP2007-223895 20070830
- 主分类号： G03G15/00
- IPC分类号： G03G15/00 ; G03G15/08 ; G03G15/16
摘要：
A load torque variation upon entry or exit of a sheet into a nipping portion is reduced while a nipping force necessary for image formation is provided. An image transfer apparatus, an image fixing apparatus, or a registration apparatus comprises an opposite roller, a transfer roller, and a compression spring for pressing the opposite roller onto the transfer roller. A sheet of transfer material is transported into a nipping portion between the opposite roller and the transfer roller, where an image on the opposite roller is transferred to the transfer material. The apparatus includes a retaining unit configured to retain a certain distance between the first rotating body and the second rotating body as long as the thickness of the transfer material that passes through the nipping portion remains the same.