Apparatus for moving individual sheets from a stack of sheets

Details Apparatus for moving individual sheets from a stack of sheets Apparatus for moving individual sheets from a stack of sheets

1988-11-22

1990-11-20

Spar, Robert J.

Material or article handling

Apparatus for moving intersupporting articles into, within,...

Unstacking apparatus

271262, 414 21, 414752, B65H 308, B65H 712

Patent

active

049715151

ABSTRACT:
A measuring device (60) measures the value (t) of a chosen parameter (thickness) of what has been lifted by a lifting assembly (40) from a stack of sheets (1) of material and allows the lifted material to be moved from the stack when the value is in a predetermined relationship to a reference value (T). One (45a) of a plurality of selectively releasable members (45) on the lifting assembly (40) is moveable in two horizontal directions to locate a sheet attached to the one releaseable member (45a) against locating pins (5, 6) on the work table (3) of the punch press (4). The entire system may be operated automatically by a controller (90).

REFERENCES:
patent: 2936171 (1960-05-01), Williams
patent: 3215427 (1965-11-01), Pierce, Jr.
patent: 3409149 (1968-11-01), Graux
patent: 3716147 (1973-02-01), Pipes
patent: 4391439 (1983-07-01), Edstrom
patent: 4806071 (1989-02-01), Sartorio

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