Top stack feeder

Details Top stack feeder Top stack feeder

1974-10-21

1976-03-16

Blunk, Evon C.

Sheet feeding or delivering

Feeding

Pack holders

271147, B65H 114

Patent

active

039442160

ABSTRACT:
A workpiece feeding apparatus for feeding workpieces from the top of a stack of workpieces, and which includes a support frame on which is movably mounted a vertical gear rack having a lifting plate on the upper end thereof for engagement with the lower end of a stack of workpieces. A horizontally disposed shaft is rotatably mounted on the support frame, and a gear is detachably fixed to the shaft for driving the gear rack upwardly. The gear may be detached from a driving engagement with the shaft after the gear rack has reached its uppermost feeding position to permit the gear rack to move by gravity downwardly to its initial starting position. A first clutch member is operatively mounted on the shaft, and is operated by a power means for driving the shaft in one direction to turn said gear and move the gear rack upwardly through a predetermined upward feeding movement. The first clutch member is overriding relative to said shaft during a succeeding downward, gravity operated retracting movement of a travel length less than said upward feeding movement. A second clutch means is operatively mounted on said shaft, and it is overriding relative to the shaft during the upward feeding movement, and it is in braking engagement with the shaft during the retracting movement. Gage means is provided to regulate the length of the retracting movement.

REFERENCES:
patent: 2350511 (1944-06-01), Lake et al.
patent: 3125337 (1964-03-01), Cruzen

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