Sheet feeding or delivering – Feeding – Separators
Patent
1988-12-23
1990-07-10
Rolla, Joseph J.
Sheet feeding or delivering
Feeding
Separators
271108, 271 31, 414797, 294 641, 73 377, 33552, 101232, B65H 308
Patent
active
049402218
ABSTRACT:
A suction-type sheet-separating device for a feeder of a printing press has suction-type grippers for lifting off an uppermost sheet from a pile of sheets and for transferring the lifted-off sheet to a transporting device for conveying the lifted-off sheet in a sheet travel direction towards a printing unit of the printing press. The suction-type grippers are disposed above the pile of sheets in the vicinity of the trailing edge of each sheet and when suction air is applied thereto, they initially grip the uppermost sheet and then execute a prestroke to a first height. The device includes a lifting gear drive and a horizontal carrying shaft parallel to the trailing edge of the sheet and carrying the suction-type grippers, the suction-type grippers being aligned with respect to the carrying shaft. The lifting gear drive serves, on an upward stroke and a downward stroke in phase with the printing press, to raise and lower the carrying shaft on a substantially straight, vertical path in a manner that, on an upward stroke, the suction-type grippers are raised to a second height located above the first height. The carrying shaft is held in the lifting gear drive so that it is able to swivel about its own longitudinal axis and is rotationally rigidly connected, so as to be rigid against relative rotation, to a link for a swivelling device for selective swivel positions. The link is guidable substantially parallel to itself in the selectable swivel positions.
REFERENCES:
patent: 2689730 (1954-09-01), Tebbs
patent: 3194055 (1965-07-01), Knobel
patent: 3937457 (1976-02-01), Schwebel
patent: 3938800 (1976-02-01), Wirz
patent: 4458891 (1984-07-01), Kawaguchi
Krause Detlev
Wirz Arno
Bollinger David H.
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
Rolla Joseph J.
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