Method and apparatus for unloading stacks of trays

Details Method and apparatus for unloading stacks of trays Method and apparatus for unloading stacks of trays

1989-11-14

1991-04-16

Spar, Robert J.

Material or article handling

Movable rack having superposed, charge-supporting elements,...

Rack moved vertically by elevating means

414392, 414401, 4147966, B65G 5902, B65G 6724

Patent

active

050077856

ABSTRACT:
An apparatus for unloading a container having different shelves, each filled with a plurality of stacks of trays filled with a product, such as eggs. The container is comprised of four vertical support sections and horizontal connecting sections which support the stack carrying shelves. During the unloading of the various shelves, each of which carries at least three adjacent stacks of trays, the middle stack is, preferably, first removed, and more preferably after loosening such middle stack by lifting and moving it sideways a small distance to prevent jamming of the middle stack and an adjacent stack. In one embodiment, a fork-shaped unloading device can be inserted under tunnel-shaped openings of the lowermost of a stack of trays, and the points of which are provided with switch elements or sensors.

REFERENCES:
patent: 2535961 (1950-12-01), Schutt
patent: 3075656 (1963-01-01), Pearne
patent: 3637095 (1972-01-01), Kampfer
patent: 3884363 (1975-05-01), Ajlouny
patent: 4597707 (1986-07-01), Cornacchia
patent: 4634333 (1987-01-01), Butterly, Jr. et al.

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