发明授权
- 专利标题： Printing method in which both sides of the recording sheet are inspected and apparatus therefor
- 专利标题（中）： 检查记录纸的两面的印刷方法及其装置
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申请号： US337376申请日： 1989-04-13
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公开(公告)号： US5004928A公开(公告)日： 1991-04-02
- 发明人: Akio Suzuki , Yoshihiro Takada , Masami Izumizaki , Toshimitsu Danzuka
- 申请人： Akio Suzuki , Yoshihiro Takada , Masami Izumizaki , Toshimitsu Danzuka
- 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： JPX63-095063 19880418; JPX63-095064 19880418; JPX63-095065 19880418; JPX63-095066 19880418; JPX63-095067 19880418
- 主分类号： B41J29/00
- IPC分类号： B41J29/00 ; G01N21/55 ; G01N21/86
摘要：
According to a method and apparatus for detecting a kind of a recording sheet, a light source for emitting a beam on the recording sheet and a photosensitive element for detecting an amount of beam are used. The photosensitive elements located at predetermined positions are caused to detect amounts of beams reflected by upper and lower surfaces of the recording sheet. The kind of upper or lower surface of the recording sheet is discriminated on the basis of a difference between the amounts of beams reflected by the upper and lower surfaces or one of the amounts of beams.