Plastic lens molding apparatus

Details Plastic lens molding apparatus Plastic lens molding apparatus

1991-08-29

1993-05-25

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to lock mold in closed position

425423, 425808, 264 11, 249154, B29C 4526, B29D 1100

Patent

active

052138259

ABSTRACT:
A plastic lens molding apparatus. A first mold, having a concave optical surface, and a second mold, having a convex optical surface, are arranged so that the optical surfaces are opposed to each other, each of the optical surfaces having an apex. An adhesive tape is applied over both the first and second molds to form a cavity between the molds. A plastic material is injected into the cavity and is then set. A plane including a tangent at an apex of the optical surface of at least one of both the first and second molds is inclined at a predetermined angle to an optical axis of the lens.

REFERENCES:
patent: 2406361 (1946-08-01), Fairbank et al.
patent: 2728106 (1955-12-01), Herman et al.
patent: 3211811 (1965-10-01), Lanman
patent: 3273204 (1966-09-01), Craddock
patent: 3460928 (1969-08-01), Casko
patent: 3902693 (1975-09-01), Crandon et al.
patent: 4163541 (1979-08-01), Campbell
patent: 4383672 (1983-05-01), Kreuttner
patent: 4659524 (1987-04-01), Neefe

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