Plastic article or earthenware shaping or treating: apparatus – Press forming apparatus having opposed press members – Periphery of female mold limiting the movement of a dynamic...
Patent
1979-05-14
1980-06-24
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Press forming apparatus having opposed press members
Periphery of female mold limiting the movement of a dynamic...
425412, 425808, 249117, 249160, 264 1, B29C 500, B29D 1100
Patent
active
042092892
ABSTRACT:
A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.
REFERENCES:
patent: 3278285 (1966-10-01), Pickering
patent: 3915609 (1975-10-01), Robinson
patent: 4113224 (1978-09-01), Clark et al.
patent: 4121896 (1978-10-01), Shepherd
patent: 4138086 (1979-02-01), Mizutani et al.
Davignon Paul A.
Hopkins Ethan C.
Newcomb Paul D.
American Optical Corporation
Duggan Jeremiah J.
Flint, Jr. J. Howard
Schneeberger Stephen A.
Spencer Alan H.
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