Sheet feeding or delivering – Delivering – With transfer means between conveyor and receiver
Patent
1990-03-12
1991-07-23
Olszewski, Robert P.
Sheet feeding or delivering
Delivering
With transfer means between conveyor and receiver
271188, 271207, 271220, 271258, B65H 702
Patent
active
050337319
ABSTRACT:
In a sheet stacking control system for a printer or copier in which sheets are sequentially fed by a sheet output for stacking in a stacking tray up to a desired preset maximum stacking level, a plural mode stack height sensing and sheet delivery detection apparatus in which a common sensor with a common actuating member is actuated by a sheet being fed by the sheet output to provide a first intermittent signal, and this same plural mode apparatus is also actuated to provide a second signal in response to the stack of sheets in the tray approaching a desired preset maximum stacking level. The first and second signals from the common sensor are distinguishable signals, so that the first, intermittent, signal is interpreted as a count of the number of sheets being outputted, and the second, continuous, signal is interpreted as a full tray condition or a sheet jam, and this second signal can provides a control signal for stopping the production or outputting of further sheets to that output tray. The actuating member is preferably an elongated light weight pivotal arm normally angularly extending across the sheet output path and down into the stacking tray to normally rest with its outer end on top of the stack of sheets except when pivoted up by another sheet being fed into the tray. Corrugating and downward pressure on the sheet being outputted upstream of the exit rolls cooperatively resists both premature sheet lead edge drooping over the stack and the weight of the actuating arm, which arm weight subsequently provides trail edge sheet settling or knockdown assistance once the trail edge of the sheet is released by the exit rolls.
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"Auto Stapler Folder", Auto Stapler-II Service Manual Revision O, Canon, May 1989, Fy8-13A3-000.
Milef Boris
Olszewski Robert P.
Xerox Corporation
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