Mold for manufacturing contact lenses

Details Mold for manufacturing contact lenses Mold for manufacturing contact lenses

1977-06-22

1979-02-06

Spicer, Jr., Robert L.

Static molds

Including coating or adherent layer

Super-imposed metal layers

249135, 425806, 425808, 425DIG58, B29D 1100

Patent

active

041380860

ABSTRACT:
A mold for manufacturing silicone contact lenses is provided. The mold comprises a male section and a female section plated with chromium or nickel which when joined together come into contact with each other only at a portion at which the mold surface of one section becomes continuous with that of the other section to define a cavity therebetween. The contact between both sections is not in a flat-to-flat fashion but in a line or edge-to-edge fashion so that a contact lens whose surface and edge are completely freed from flashes or irregularities can be obtained. Further, with the use of chromium or nickel plated mold of the present invention, a contact lens of excellent quality can be obtained from a silicone resin which is affinitive to chromium and nickel.

REFERENCES:
patent: 285058 (1883-09-01), Nickerson
patent: 2292917 (1942-08-01), Williams
patent: 3166796 (1965-01-01), Wehinger
patent: 3915609 (1975-10-01), Robinson

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