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
Patent
1992-04-23
1993-10-19
Nguyen, Khanh P.
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, 249134, 264 23, B29C 3334, B29C 3940
Patent
active
052540006
ABSTRACT:
A mold for an organic polymer, ophthalmic lens element has separate upper and lower mold members with each mold member being composed of a thermoplastic polymer. The lower mold member has a central, bowl-shaped cavity with contours that conform to those of a lens to be molded therein, and has an annular rim surrounding the upper edge of the cavity. The upper member has a central portion with an under surface that corresponds in contour to that of the upper surface of the lens to be molded, and has an annular rim that surrounds the central portion and rests on the annular rim of the lower member when the two members are assembled.
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Friske Mark S.
Hollon Paul W.
Keyes Donald L.
Noll Frederick E.
Corning Incorporated
Nguyen Khanh P.
Peterson M. M.
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