Suction control system for printing or duplicating machines

Details Suction control system for printing or duplicating machines Suction control system for printing or duplicating machines

1991-01-09

1992-09-01

Olszewski, Robert P.

Sheet feeding or delivering

Feeding

Separators

271107, B65H 308

Patent

active

051433648

ABSTRACT:
A printing or duplicating machine has a suction control system which includes a source of vacuum and a conduit connecting the source of vacuum to a suction feeder. An operator panel is used to set a pattern of relative weight of each sheet in a stack. A controlled bleed valve is operatively associated with any of the suction feeder, source of vacuum or conduit for automatically adjusting vacuum at the suction feeder responsive to relative weight of any given sheet as selected by an operator.

REFERENCES:
patent: 1736483 (1929-11-01), Broadmeyer
patent: 4391439 (1983-07-01), Edstrom
patent: 4589645 (1986-05-01), Tracy
patent: 5076559 (1991-12-01), Lawniczak
Wenthe, Jr., Stephen J., "Stack Weight Sensing Tray", Xerox Disclosure Journal. vol. 7, No. 4, pp. 229. (Jul./Aug. 1982).

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