Material or article handling – Device for emptying portable receptacle – For emptying contents thereof into portable receiving means
Patent
1992-07-02
1994-01-04
Bucci, David A.
Material or article handling
Device for emptying portable receptacle
For emptying contents thereof into portable receiving means
414331, 414416, 414937, B65G 6500
Patent
active
052755215
ABSTRACT:
A wafer transfer device is intended to transfer wafers between a wafer boat in which a plurality of wafer support plates are vertically arranged at regular intervals and a cassette in which a plurality of wafer-mounted levels are vertically arranged at regular intervals. Each of the wafer support plates is ring-shaped having an opening in the center thereof and a passage is defined by openings of the wafer support plates, extending vertically in the boat. The wafer is horizontally transferred into and out of the wafer boat between the wafer support plates by a fork. The fork can be moved in vertical and horizontal directions and it can also be swung. A wafer push-up disk is arranged movable up and down through the passage in the boat. Three wafer supports are projected from the top of the push-up disk. These projections on the push-up disk are arranged contactable with the underside of the wafer without interfering with the fork. The fork and the push-up disk are associated with each other by a controller to achieve the transferring of wafers.
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patent: 4775281 (1988-10-01), Prentakis
patent: 4985722 (1991-01-01), Ushijima et al.
patent: 5022695 (1991-06-01), Ayers
patent: 5054988 (1991-10-01), Shiraiwa
patent: 5110248 (1992-05-01), Asano et al.
patent: 5125784 (1992-06-01), Asano
patent: 5162047 (1992-11-01), Wada et al.
Bucci David A.
Tokyo Electron Sagami Limited
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