Variable pitch lapping block for polishing lenses

Details Variable pitch lapping block for polishing lenses Variable pitch lapping block for polishing lenses

1993-04-06

1994-09-13

Lavinder, Jack W.

Abrading

Work holder

Lens or prism

451384, B24B 13005

Patent

active

053457250

ABSTRACT:
A variable pitch lapping block for use in polishing a range of prescription lenses having different radii of curvatures is obtained by the use of an element made of rubber or the like, which is associated with a pressurized chamber, wherein the element exhibits a range of curvatures depending upon the variation of the pressure in the chamber.

REFERENCES:
patent: 490419 (1893-01-01), Webster
patent: 2189472 (1940-02-01), Peterson
patent: 2475972 (1949-07-01), Longley
patent: 3886696 (1975-06-01), Bruck

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