Molding contact lenses using a directed stream of gas

Details Molding contact lenses using a directed stream of gas Molding contact lenses using a directed stream of gas

1982-08-26

1984-07-10

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Rotational molding

264 11, 264 85, 264310, 425808, B29D 1100

Patent

active

044592469

ABSTRACT:
The lens is molded in a concave lens mold, the liquid lens monomer is placed in the concave mold and a controlled stream of gas is directed at the center of the liquid surface and shapes the concave lens surface upon polymerization of the monomer.

REFERENCES:
patent: 2302020 (1942-11-01), Frederick, Jr.
patent: 3454686 (1969-07-01), Jones
patent: 3660545 (1972-05-01), Wichterle
patent: 3691263 (1972-09-01), Stoy et al.
patent: 3699089 (1972-10-01), Wichterle

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