Sheet feeding system for printing machines

Details Sheet feeding system for printing machines Sheet feeding system for printing machines

1981-07-06

1984-02-21

Schacher, Richard A.

Sheet feeding or delivering

Delivering to stack and feeding therefrom

With sheet sensor for selective location

271 9, 271105, 271128, 271146, B65H 510

Patent

active

044325398

ABSTRACT:
Automatic transfer of one (4a) or a group or package (4'a) of secondary or scrap sheets from a stack (4) over a stack (3) of primary or good-quality sheets on which printing is to be effected, is controlled, for example by a microprocessor control system (12) by placing a stack (4) of secondary sheets adjacent the stack (3) of primary sheets. A secondary sheet transport system (9, 10, 11; 20, 9; 26, 27, 229, 32, 33) grips at least one (4a) or a package (4'a) of secondary sheets and pushes, pulls or similarly transfers the sheet or package of sheets over the topmost one of the primary sheets. To facilitate separation of sheets, a blower is provided blowing air against the edge of the secondary sheets where pick-up is to be effected. Automatic control is possible by introducing into the control unit monitoring signals derived from the printing machine.

REFERENCES:
patent: 1633937 (1927-06-01), Ford
patent: 3914154 (1975-10-01), Pfeiffer
patent: 4184672 (1980-01-01), Watkins
patent: 4211398 (1980-07-01), Bishop
patent: 4247093 (1981-01-01), Kistner

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