Device for picking up bendable flat parts

Details Device for picking up bendable flat parts Device for picking up bendable flat parts

1992-07-17

1995-01-10

Huppert, Michael S.

Material or article handling

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

Unstacking apparatus

4147969, 414907, B65G 5902

Patent

active

053801474

ABSTRACT:
A device for lifting one or more flexible, flat parts such as stacked pap pasteboard, cardboard, plastic is disclosed. The device relies on the propensity of a bundle of such parts to flex up around its edge when compressed at a point away from that edge. In one embodiment, a compression device presses down on one bundle in a stack of several bundles of parts to be lifted and a second compression device presses down the underlying stack, thus opening up a gap between the upper bundle and lower stack. A lifting arm is driven into this gap, and a clamp presses down on the bundle above the lifting arm, grasping the bundle. Two retainers are extended down onto the lower stack to prevent the stack from moving as the bundle is lifted. Once contact between the lifted bundle and the remaining stack is broken, the retainers are withdrawn and the lifting device is maneuvered to a delivery position.

REFERENCES:
patent: 4861227 (1989-08-01), Cinotti
patent: 4911608 (1990-03-01), Krappitz et al.
patent: 5040942 (1991-08-01), Brinker et al.
patent: 5102293 (1992-04-01), Schneider
patent: 5107085 (1991-05-01), Ishikawa
patent: 5169284 (1992-12-01), Berger et al.

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