Computer lens block and method of forging

Details Computer lens block and method of forging Computer lens block and method of forging

1978-11-13

1984-07-17

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

419 28, B24B 4106

Patent

active

044597843

ABSTRACT:
A lens block used to secure an opthalmic lens during its formation by conventional forming equipment wherein the lens block comprises an integrally formed single piece structure of hardened metal material having centering means including a plurality of linearally aligned apertures each having a substantially conical configuration formed directly in the surface of the lens block oppositely disposed to the surface which is interconnected to the lens itself. The lens block is formed from a powdered metal material comprised of hard metal alloys which is sintered and heat treated to attain a desired condition of particle hardness in the upper range of the Rockwell C Scale.

REFERENCES:
patent: 2224168 (1940-12-01), Tillyer
patent: 2686391 (1954-08-01), Porter
patent: 3140568 (1964-07-01), Beasley
patent: 3192676 (1965-07-01), Buckminster
patent: 3448549 (1969-06-01), McCall
patent: 4002471 (1979-01-01), Sarnes

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