Method of removing molded lenses from the mold

Details Method of removing molded lenses from the mold Method of removing molded lenses from the mold

1978-02-07

1979-05-22

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

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

264313, 264334, 425808, B29D 1100

Patent

active

041559622

ABSTRACT:
A method of making plastic lenses by casting a liquid monomer in a container having the required optical curve on the bottom of the container, polymerizing the monomer to form a solid having an optical surface formed within the container and cutting a second optical surface on the solid lens material with the container supporting the lens material during the cutting and polishing operation. Removing the lens from the casting container by applying force against the sides of the container to distort the container and stretching the surface to effect the release of the lens.

REFERENCES:
patent: 1378064 (1921-05-01), Terranova
patent: 3353220 (1967-11-01), Lenoble
patent: 3841598 (1974-10-01), Grucza
patent: 3876734 (1975-04-01), Howden
patent: 3931373 (1976-01-01), Beattie
patent: 4027845 (1977-06-01), Putzer

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