Method and apparatus for masking removable optical lens markings

Details Method and apparatus for masking removable optical lens markings Method and apparatus for masking removable optical lens markings

1992-09-18

1994-09-06

Rachuba, M.

Abrading

Abrading process

Utilizing shield

451 42, 451390, B24B 100

Patent

active

053436571

ABSTRACT:
A method and apparatus for protecting removable markings on an optical lens during grinding thereof to a desired prescription. A mask is placed over the markings prior to application of an adhesive tape, to which a low temperature alloy block is bonded for holding of the lens during grinding. The mask preferably covers only the markings, and is transparent to allow alignment thereof. Preferably the mask is held in place on the lens surface without the use of an adhesive, although a low tack adhesive may be used which does not remove the markings when the mask is peeled away from the lens. A preferred material for the mask is a static cling vinyl.

REFERENCES:
patent: 4221083 (1980-09-01), Carroll
patent: 4925518 (1990-05-01), Wasserman et al.
patent: 4942696 (1990-07-01), Winthrop et al.

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