Precision referencing/latching system for document separation an

Details Precision referencing/latching system for document separation an Precision referencing/latching system for document separation an

1994-10-17

1996-09-10

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

Separators

271 41, 271 1011, 271274, 271121, 358498, B65H 306

Patent

active

055538428

ABSTRACT:
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.

REFERENCES:
patent: 3661383 (1972-05-01), Morrison
patent: 4474365 (1984-10-01), DiBlasio
patent: 4854757 (1989-08-01), Kikuchi
patent: 5412462 (1995-05-01), Matsuo et al.

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