Tray stacking and unstacking apparatus

Details Tray stacking and unstacking apparatus Tray stacking and unstacking apparatus

1976-01-09

1977-08-23

Paperner, L. J.

214 6TS, 214 85K, B65G 6000

Patent

active

040434605

ABSTRACT:
An apparatus for stacking or unstacking trays comprising a tray holding mechanism and a drive member for moving the tray holding mechanism from an initial position along a prescribed closed path. In the stacking mode of operation, upon movement along the path, the tray holding mechanism moves downwardly depositing a first tray held thereby onto a second tray previously supplied to a receiving station on a tray support platform such as a conveyor. Continued movement along the path causes the tray holding mechanism to engage the second tray and to raise the stacked first and second trays to permit a third tray to be supplied to the receiving station by the conveyor. This sequence is continued until as many trays as desired are stacked. Alternatively, the disclosed apparatus may be switched to an unstacking mode wherein trays are deposited in succession from a stack to the receiving station on the conveyor.

REFERENCES:
patent: 3043476 (1962-07-01), Zwarycz
patent: 3401808 (1968-09-01), Kemp
patent: 3752361 (1973-08-01), Van Linder et al.
patent: 3765546 (1973-10-01), Westerling
patent: 3782591 (1974-01-01), Fries
patent: 3858732 (1975-01-01), Kemper
patent: 3884366 (1975-05-01), Leenaards

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