Master pattern assembly for lens circumference grinding

Details Master pattern assembly for lens circumference grinding Master pattern assembly for lens circumference grinding

1985-09-10

1987-09-15

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51284E, 51216LP, B24B 900

Patent

active

046930345

ABSTRACT:
A master pattern assembly for providing eyeglass lens circumference shape guidance in an edge grinding machine, suitable for creation of a replacement lens for eyeglasses where one lens is broken and one remains intact. The intact lens is removed from the frame, its optical center is located, and the lens is adhered to a dual-adhesive pad which is also adhered on a side opposite the lens to a body block. The block and pad define coaxial throughgoing bores centered on the optical center of the lens. The bore of the block is then received on a rotatable axis of a conventional edge grinding machine, where the assembly is rotated and the circumference of the intact lens acts as a cam in contact with a pattern follower, controlling circumference formation of a new lens.

REFERENCES:
patent: 3962833 (1976-06-01), Johnson

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