Material or article handling – Device for emptying portable receptacle – Nongravity type
Patent
1986-12-02
1988-10-04
Werner, Frank E.
Material or article handling
Device for emptying portable receptacle
Nongravity type
414786, 414752, 414754, 414757, 414627, 414331, 414281, 414280, 414225, 414217, 414661, 118729, 118500, B65G 100
Patent
active
047752815
ABSTRACT:
Apparatus for loading and unloading wafers including a support structure having associated with it a predetermined wafer engagement position at which wafers can be engaged by the processing machine, a temporary storage device mounted on the support structure for storing a wafer in position for pick up, the flat surfaces of the wafer being parallel to an X-axis and perpendicular to a Z-axis, a first wafer engagement member for carrying the wafer on the first engagement member between the temporary storage device and the engagement position, a first X-direction mover mounted on the support structure and operable to move the first engagement member parallel to the X-axis, a second wafer engagement member for carrying the wafer on the second engagement member between the temporary storage device and the engagement position, a second X-direction mover mounted on the support structure and operable to move the second engagement member parallel to the X-axis independent of the first engagement member, a Z-direction mover mounted on the support structure and operable to move the first and second engagement members in the Z-direction, and a controller to cause the first X-direction mover to move the first engagement member parallel to the X-axis toward the engagement position at the same time as or shortly after the second engagement member moves parallel to said X-axis away from the engagement position.
REFERENCES:
patent: 3823836 (1974-07-01), Cheney et al.
patent: 3868759 (1975-03-01), Hartleroad et al.
patent: 4457661 (1984-07-01), Flint et al.
patent: 4465416 (1984-08-01), Burkhalter et al.
patent: 4558983 (1985-12-01), Freeman et al.
patent: 4618292 (1986-10-01), Judge et al.
W. T. Anderson, "Workpiece Transfer Unit", Apr. 1976, IBM Technical Disclosure Bull.
Teradyne, Inc.
Werner Frank E.
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