Material or article handling – Device for emptying portable receptacle – Nongravity type
Patent
1997-05-16
1998-09-08
Bucci, David A.
Material or article handling
Device for emptying portable receptacle
Nongravity type
414811, 414937, 901 9, 901 47, B65G 104
Patent
active
058036962
ABSTRACT:
A safety interlock system and method of unloading a standard manufacturing cassette using a safety interlock system are described which prevent the robotic arm used to unload the cassettes from unloading the cassette unless the cassette is in the proper unloading position. The safety interlock system uses a light beam emitted by a light source and illuminating a light sensitive switch if the cassette is not in the proper unloading position. If the cassette is in the proper unloading position the cassette interrupts the light beam and the light sensitive switch is not illuminated. Illuminating the light sensitive switch energizes a relay primary coil which interrupts power delivered to the electrical control unit of the robotic arm and activates an alarm unit.
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Lin Te Yun
Lin Y. F.
Tsai Po-Yueh
Wang Rea-Chang
Ackerman Stephen B.
Bucci David A.
Prescott Larry J.
Saile George O.
Taiwan Semiconductor Manufacturing Company , Ltd.
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