Method for manufacturing silicone contact lenses

Details Method for manufacturing silicone contact lenses Method for manufacturing silicone contact lenses

1978-10-10

1981-08-25

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

264338, B29D 1100

Patent

active

042858909

ABSTRACT:
A method for manufacturing silicone lenses by use of a mold of specific structure is provided. The mold comprises a male section and a female section each of which has a mold surface plated with chromium, hard chromium or nickel. Both sections when joined together come into line contact with each other to define a mold cavity therebetween. With this type of mold, the method of the present invention is carried out in such a manner that a silicone resin material is cast into the mold cavity and the mold is heated in hot water until the material is cured. The cured material makes itself a finished contact lens of excellent quality.

REFERENCES:
patent: 3811647 (1974-05-01), Pink
patent: 3915609 (1975-10-01), Robinson
patent: 4208364 (1980-06-01), Shepherd

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