Vacuum document feeder

Details Vacuum document feeder Vacuum document feeder

1981-11-16

1983-10-25

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separator and conveyor

271 20, 271 30A, 271 91, 271106, 271107, B65H 308

Patent

active

044114168

ABSTRACT:
A new and improved vacuum document feeder provides a vacuum cup support mechanism which follows a somewhat crescent-shaped coupler curve that eliminates the vacuum cup wear-producing disadvantages of the prior art; improves separation of documents, and provides for increased feeding rates. A four-bar system moves a table over the somewhat crescent-shaped coupler curve, while at all times holding an edge of the table parallel to the documents. Two vacuum cups are individually pivotally mounted on the table, to sweep over an angle which accommodates leaning documents. Cams on a drive pulley associated with the transport system coordinates the table movement with both the pivoting and vacuumizing of the cups. The cups move in a manner to cause the document to buckle thereby improving separation between documents and eliminating double feeding.

REFERENCES:
patent: 2145764 (1939-01-01), Goebel
patent: 2950913 (1960-08-01), Staines
patent: 3673759 (1972-07-01), Ayres
patent: 3690477 (1972-09-01), Nilsson
patent: 4013283 (1977-03-01), Tress

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