发明授权
- 专利标题: Document feeder, image reader, and image forming apparatus
- 专利标题(中): 文件馈送器,图像读取器和图像形成装置
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申请号: US13158557申请日: 2011-06-13
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公开(公告)号: US08376349B2公开(公告)日: 2013-02-19
- 发明人: Yasumasa Morimoto , Hiroshi Nakatani , Masato Tamehira , Sohichi Takata
- 申请人: Yasumasa Morimoto , Hiroshi Nakatani , Masato Tamehira , Sohichi Takata
- 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
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2010-135490 20100614
- 主分类号: B65H5/22
- IPC分类号: B65H5/22
摘要:
A document feeder includes a document placing portion, a pick-up roller, a pair of feed rollers, a pair of registration rollers, a document sensor, a moving mechanism, and a control portion. The pick-up roller can move between a sheet feeding position where the pick-up roller contacts with the upper surface of the document placed on a placement surface and a standby position where the pick-up roller does not contact with the upper surface of the document placed on the placement surface. The document sensor detects a document between the feed rollers and the registration rollers in a document feed direction. The moving mechanism moves the pick-up roller up and down. The control portion moves the pick-up roller up to the standby position at a timing when the leading edge of the card document reaches the document sensor in a card document mode in which card documents are successively fed.