Lens working apparatus

Details Lens working apparatus Lens working apparatus

1982-09-13

1985-04-23

Smith, James G.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

B24B 700

Patent

active

045121087

ABSTRACT:
A lens working apparatus permitting the formation of a circumferential rib on the edge of a lens for exact fit in a lens rim with interengagement of the circumferential rib and a V-shaped groove on the inner edge of the lens rim. Smooth formation of the rib is achieved by controlling axial positioning of the lens blank relative a grindstone in accordance with a defined contact angle formed between a lens model and a lens model partner piece. The lens model is fixedly rotated with the lens blank, and the changing contact angle is continuously monitored to control axial alignment of the lens blank.

REFERENCES:
patent: 3332172 (1967-07-01), Stern

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