发明名称 |
Precision referencing/latching system for document separation and transport in a scanning unit |
摘要 |
<p>In a scanning unit such as a facsimile machine, an automatic document feeder transports individual sheets from a stack of documents along a document path over a scanning window to an output tray. Precise co-planar referencing is provided between a pick roller mounted on a frame beneath a document path and a document separator mechanism mounted on an upper guide member which moves between an open position for allowing manual access to the document path to a closed position for scanning document sheets. An integrated sheet metal chassis on the upper guide member provides a direct reference path between a central portion of the chassis which carries the document separator mechanism as well as Z axis and Y-axis (media transport direction) reference datums on both side edges of the channels which are engaged by a rigid vertical reference arm. A latching device is located closely adjacent to the reference datums to securely hold the upper guide member in a predetermined closed position, as well as determine positioning in the X axis. A pair of pivotal arms at the post-scanning end of the chassis allow clearance in the X-axis and Y-axis while providing secondary referencing in the Z-axis. <IMAGE></p> |
申请公布号 |
EP0707975(A2) |
申请公布日期 |
1996.04.24 |
申请号 |
EP19950116310 |
申请日期 |
1995.10.16 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
WILCOX, DARREN W.;SONNENBURG, DENNIS, (NMI) |
分类号 |
B65H3/52;B41J13/10;H04N1/00;(IPC1-7):B41J29/00;B41J13/00 |
主分类号 |
B65H3/52 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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