Sheet feeder for printing machines and the like

Details Sheet feeder for printing machines and the like Sheet feeder for printing machines and the like

1991-04-08

1992-07-21

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separators

271183, 271218, B65H 3132

Patent

active

051316471

ABSTRACT:
A sheet delivery for a printing machine or the like with a device for changing a sheet pile while the machine is in operation, includes suction-type grippers insertable into a sheet feeder, opposite to a conveying direction of the sheets and between pile stops for a leading edge of the sheets, the suction-type grippers having a device for gripping by suction, in an inserted end position of the grippers, the leading edge of a sheet deposited onto the suction-type grippers and for holding the sheet at a distance above the sheet pile in an auxiliary-pile position, so as to permit the insertion of an auxiliary-pile device beneath the sheet, and a device for stretching the sheet after the leading edge of the sheet has been gripped by the inserted suction-type grippers, the sheet-stretching device being effective for withdrawing the suction-type grippers a predetermined distance towards the pile stops for the leading edge of the sheet.

REFERENCES:
patent: 2106199 (1938-01-01), Wormser
patent: 2785894 (1957-03-01), Reinartz
patent: 2836418 (1958-05-01), Blattner et al.
patent: 3966195 (1976-06-01), Simeth

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