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    Apparatus for detecting media leading edge and method for substantially eliminating pick skew in a media handling subsystem
    41.
    发明公开
    Apparatus for detecting media leading edge and method for substantially eliminating pick skew in a media handling subsystem 失效
    一种用于检测打印介质和方法，用于避免歪斜，在片材处理子系统，在适当情况下夹紧时发生的前沿，

    公开(公告)号：EP0723873A3

    公开(公告)日：1997-06-25

    申请号：EP95309238.4

    申请日：1995-12-19

    申请人： Hewlett-Packard Company

    发明人： Quintana, Jason

    IPC分类号： B41J13/26

    CPC分类号： B41J13/03

    摘要： A media handling subsystem (10) picks a media sheet (S) from a stack (42), then moves the picked sheet along a media path. Any skewing of the media sheet existing in the media stack or occurring during the pick cycle is removed before the sheet reaches a position to receive print markings. In particular, the alignment of the skewed media sheet is altered (i.e., the sheet is moved) to square the media sheet to the media path. An electro-optic sensor (16) detects when the top (56) of a media sheet is adjacent to or at a drive roller (28) and pinch roller (46). The media sheet moves a mechanical flag (23) into the light circuit of the optical sensor. After the media sheet trips the flag, the drive roller (28) moves the top edge of the media sheet backward along the media path out of the grasp of the pinch roller and drive roller. As the sheet moves out of the grasp, the top edge of the sheet falls into squared alignment with the drive roller and pinch roller. The squared media sheet then is moved forward tripping the flag again. The drive roller then pulls the sheet along the media path into the path of the optical sensor so that the optical sensor detects the top of the page. The sensor then is shuttled to scan for a side of the page. With the top of page and side of page known, and with it known that the page is squared to the media path, markings are placed accurately on the media sheet.

    Apparatus for detecting media leading edge and method for substantially eliminating pick skew in a media handling subsystem
    43.
    发明公开
    Apparatus for detecting media leading edge and method for substantially eliminating pick skew in a media handling subsystem 失效
    一种用于检测打印介质和方法，用于避免歪斜，在片材处理子系统，在适当情况下夹紧时发生的前沿，

    公开(公告)号：EP0723873A2

    公开(公告)日：1996-07-31

    申请号：EP95309238.4

    申请日：1995-12-19

    申请人： Hewlett-Packard Company

    发明人： Quintana, Jason

    IPC分类号： B41J13/26

    CPC分类号： B41J13/03

    摘要： A media handling subsystem (10) picks a media sheet (S) from a stack (42), then moves the picked sheet along a media path. Any skewing of the media sheet existing in the media stack or occurring during the pick cycle is removed before the sheet reaches a position to receive print markings. In particular, the alignment of the skewed media sheet is altered (i.e., the sheet is moved) to square the media sheet to the media path. An electro-optic sensor (16) detects when the top (56) of a media sheet is adjacent to or at a drive roller (28) and pinch roller (46). The media sheet moves a mechanical flag (23) into the light circuit of the optical sensor. After the media sheet trips the flag, the drive roller (28) moves the top edge of the media sheet backward along the media path out of the grasp of the pinch roller and drive roller. As the sheet moves out of the grasp, the top edge of the sheet falls into squared alignment with the drive roller and pinch roller. The squared media sheet then is moved forward tripping the flag again. The drive roller then pulls the sheet along the media path into the path of the optical sensor so that the optical sensor detects the top of the page. The sensor then is shuttled to scan for a side of the page. With the top of page and side of page known, and with it known that the page is squared to the media path, markings are placed accurately on the media sheet.

    摘要翻译： 该方法涉及从堆栈拾取介质片材，然后移动沿着媒体路径拾取片材。存在于媒体栈或拾取周期过程中发生的介质片材的任何歪斜除去片材到达一个位置，以接收打印标记之前 ， 特别地，倾斜介质片材的取向被改变（即，片材被移动）到方形介质片材的介质通道。一种电光传感器检测当介质片材的顶部的驱动辊和夹送之间进入 摩托车。 在进入中，介质片材移动的机械标志到光传感器的光电路。 介质片材跳闸标志之后，驱动辊沿所述介质路径向后移动介质片材的顶部边缘从夹送辊和驱动辊的把握。 作为片材移出把握的，片材的顶部边缘落入与所述驱动辊和夹送辊平方对准。 平方介质片材然后向前移动再次跳闸旗。 驱动辊然后再换片沿着介质路径进入光学传感器的路径如此做了光学传感器检测到页面的顶部。 然后，传感器穿梭扫描的页面的一侧。 用页面的顶部，并且已知的网页的侧边，并与它已知所做的页面被平方到媒体路径，标记被准确地设定放置在介质片材。