Centrifugal casting of contact lenses

Details Centrifugal casting of contact lenses Centrifugal casting of contact lenses

1982-09-13

1983-12-27

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Rotational molding

264311, 425808, B29D 1100

Patent

active

044229844

ABSTRACT:
A method of casting contact lenses by forcing the liquid monomer into the optical molds under very high pressure, the pressure being provided by centrifugal force by revolving the lens mold around a center of rotation perpendicular to the optical axis of the lens and polymerizing the liquid monomer under pressure to form the lens.

REFERENCES:
patent: 2325019 (1943-07-01), Rubisson
patent: 2429692 (1947-10-01), Joyce
patent: 3010153 (1961-11-01), Bittner
patent: 3274301 (1966-09-01), Kulp, Jr.
patent: 3660545 (1972-05-01), Wichterle
patent: 4002418 (1977-01-01), Wallace
patent: 4217124 (1980-08-01), Wyden

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