Substrate elevator mechanisms

Conveyors: power-driven – Conveyor system for moving a specific load as a separate unit – System includes a rotating or endless carrier with a load...

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198486, 414416, B65G 2500, B65G 6502

Patent

active

045138559

ABSTRACT:
The development is an improved elevator hook forming part of an elevator for transferring ceramic substrates in a tray between a magazine and a stepwise indexable rotatable cage in a sputtering chamber. The improved hook has a vertical shank, a vertical arm disposed on one side of the shank and pivotally coupled thereto, a laterally salient horizontal elevator member disposed at the lower end of the arm for supporting the tab of such a tray, a horizontal retainer member laterally and vertically opposite the elevator member and transversely offset therefrom, and a spring urging the elevator member towards the retainer member. The gap is normally small enough to prevent a tray tab dislodged from the elevator member from falling through the gap. The tray tab is placed on the elevator member by causing the gap to open up, under force from a tray lug pressed against the members at one end of the gap, to a width sufficient to permit the lug to pass laterally through the gap to its other end at which the tray tab is deposited on the elevator member. Other features are that the gap at its entrance end has a flared entrance, and that the tray tab is rounded and is seated on the elevator member in a groove of such configuration that there is developed a horizontal force component tending to retain the tab in the groove.

REFERENCES:
patent: 1025853 (1912-05-01), Bartholomew
patent: 1994646 (1935-03-01), Heath
patent: 2166381 (1939-07-01), Taylor et al.
patent: 2868354 (1959-01-01), Harrison
patent: 3033345 (1962-05-01), Prymek
patent: 4336875 (1982-06-01), Minnetti

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