Low oxygen molding of soft contact lenses
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United States of America Patent
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May 19, 1998
Issued Date -
N/A
app pub date -
Mar 6, 1997
filing date -
Jun 10, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A process for providing degassed complementary concave and convex lens molds to filling and mold assembly stations in a continuous or semicontinuous automated soft contact lens manufacturing system. The process includes injection molding the lens molds, immediately transferring the lens molds to an inert gas atmosphere, degassing the lens molds, and filling the lens molds with a polymerizable monomer under the inert gas prior to mold assembly.
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