Disc orienting device

Details Disc orienting device Disc orienting device

1983-04-28

1984-04-10

Nase, Jeffrey V.

Material or article handling

Article reorienting device

Article frictionally engaged and rotated by relatively...

198394, 406 87, B65G 4724

Patent

active

044418531

ABSTRACT:
A device for orienting a disc having a flat portion formed on the outer periphery thereof, for example, a wafer for the manufacture of a semiconductor circuit element. The disc is guided and rotated by a rotatable roller and a drive roller which point-contact the outer periphery of the disc. The rotation of the disc is stopped when the disc has come to a predetermined rotational position. By this, rough orientation of the disc is accomplished. Subsequently, the disc is urged toward the rotatable roller and the drive roller. At this time, the drive roller is disconnected from a drive source and becomes a low torque rotating roller. Accordingly, precise orientation is accomplished without hampering the rotation of the disc.

REFERENCES:
patent: 3820647 (1974-06-01), Waugh, Jr. et al.
patent: 3865254 (1975-02-01), Johannsmeier
patent: 3982627 (1976-09-01), Isohata

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