Replaceable lens surfacing pad with integral wear indicating pat

Details Replaceable lens surfacing pad with integral wear indicating pat Replaceable lens surfacing pad with integral wear indicating pat

1976-02-23

1977-04-26

Smith, Al Lawrence

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51209DL, 51DIG34, B24D 1102

Patent

active

040192890

ABSTRACT:
A replaceable lens surfacing pad with integral wear indicating pattern. Pad material is conformable to the face of a lens surfacing tool and is impervious to the abrasive slurry used in fining and polishing operations in the manufacture of optical quality lenses. A wear indicating pattern is milled, embossed, or etched into the pad face which contacts the lens in association with the abrasive slurry. The pattern consists of one or more intermediate faces at one or more levels between the pad face contacting the lens and the opposite pad face bonded with pressure sensitive adhesive to the lens surfacing tool. As the lens surfacing operation progressively erodes the pad face contacting the lens, the remaining distance to one or more intermediate faces reveals the regularity or irregularity and amount of pad wear before surfacing tool damage occurs.

REFERENCES:
patent: 2701192 (1955-02-01), Maass
patent: 3583111 (1971-06-01), Volk
patent: 3699721 (1972-10-01), Beasley
patent: 3921342 (1975-11-01), Day

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