发明授权
- 专利标题： Sheet feeding apparatus and image forming apparatus with lifter mechanism
- 专利标题（中）： 送纸装置和具有升降机构的成像装置
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申请号： US12202490申请日： 2008-09-02
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公开(公告)号： US07971868B2公开(公告)日： 2011-07-05
- 发明人: Akira Matsushima , Minoru Kawanishi , Yasuhiro Uchida , Eiji Wakiyama
- 申请人： Akira Matsushima , Minoru Kawanishi , Yasuhiro Uchida , Eiji Wakiyama
- 申请人地址： JP 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： JP Tokyo
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2007-232260 20070907
- 主分类号： B65H3/06
- IPC分类号： B65H3/06
摘要：
A sheet feeding apparatus includes a middle plate, a lifter mechanism, and a sheet-feed roller. The sheet-feed roller can move to a first position retracted from the sheet, a second position lower than the first position for feeding the sheet, and a third position lower than the second position. The sheet feeding apparatus has a position control mode in which when a sheet is fed, the sheet-feed roller is moved from the first position to the third position and stopped there, the middle plate is moved toward the sheet-feed roller by the lifter mechanism, the sheet stacked on the middle plate is brought into abutment against the sheet-feed roller, the middle plate is moved until a position detection sensor outputs the detection signal that the sheet-feed roller is in the second position, and a height of the sheet is controlled.
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