Casting process for plastic lenses

Details Casting process for plastic lenses Casting process for plastic lenses

1978-01-19

1980-03-04

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264313, B29D 1100

Patent

active

041917170

ABSTRACT:
A process and apparatus particularly suited for casting ophthalmic lenses from a liquid monomer such as "CR-39". The liquid monomer and a catalyst are metered into a plastic lower mold member. A plastic upper mold member is supported by the upper surface of the liquid and by a suspension arrangement which includes a spacer ring and a plurality of ears extending from the upper mold member. The upper mold member is controllably drawn downwardly as the liquid plastic solidifies. Optical surfaces are obtained without polishing or other finishing.

REFERENCES:
patent: 2304217 (1942-12-01), Tillyer
patent: 2333051 (1943-10-01), Smith
patent: 2406361 (1946-08-01), Fairbanks et al.
patent: 2479935 (1949-08-01), Johnson
patent: 3056166 (1962-10-01), Weinberg
patent: 3240854 (1966-03-01), Ewer
patent: 3278654 (1966-10-01), Grandperret
patent: 3337659 (1967-08-01), Grandperret
patent: 3555611 (1971-01-01), Reiterman
patent: 3761208 (1973-09-01), Bondet et al.
patent: 4008031 (1977-02-01), Weber
patent: 4113224 (1978-09-01), Clark et al.
patent: 4121896 (1978-10-01), Shepherd

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