Method and device for separating lifts from a stack of sheets

Details Method and device for separating lifts from a stack of sheets Method and device for separating lifts from a stack of sheets

1992-12-22

1995-08-15

Huppert, Michael S.

Sheet feeding or delivering

Feeding

Separators

271118, 271126, 4147989, 414786, B65H 310

Patent

active

054412498

ABSTRACT:
Lifts or sets of precise count are withdrawn from a stack of sheets. A reciprocating vacuum head serially pulls away sheet corners from the stack. Each sheet is stripped from the head and held by the backside of the head at a holding zone axially spaced apart from the stack until the desired quantity in the set is accumulated. A wedge then interposes in the space between the set of restrained corners and the rest of the stack, to bend the upper half of the sheet set away from the stack while the rest of the set remains in contact with the stack. Then nip rollers engage the bent away parts as a set and draw away the whole of the set transversely.

REFERENCES:
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patent: 3690475 (1972-09-01), Pfaffle
patent: 3757970 (1973-09-01), Pfaffle
patent: 4286908 (1981-09-01), Pfaffle
patent: 4484735 (1984-11-01), Goi
patent: 4928944 (1990-05-01), Golicz
patent: 5064183 (1991-11-01), Nishigaki et al.
patent: 5072921 (1991-12-01), Golicz
patent: 5096176 (1992-03-01), Golicz et al.
GBR Systems Corp. "Smart Feeder Folder Cut Sheet System 420" (Unknown Date) 2 pg.
Intelligent Technologies Corp. Brochure (Unknown Date) 6 pg.
Mathias Baverle GmbH "Operating Instructions for Synchronised Sheet Feeder" (Unknown Date) 1 pg.

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