Low oxygen molding of soft contact lenses

Details Low oxygen molding of soft contact lenses Low oxygen molding of soft contact lenses

B - Operations, Transporting

29

D

B29D 11/00 (2006.01) B29C 33/38 (2006.01) B29C 37/00 (2006.01) B29C 39/42 (2006.01) B29C 45/00 (2006.01)

Patent

CA 2151333

A process and a system for providing essentially fully degassed complementary concave and convex lens molds to filling and mold assembly stations, respectively, in a continuous or semi-continuous automated soft contact lens manufacturing system. The process comprises injection molding the lens molds and immediately transferring the lens molds to an inert gas atmosphere. The lens molds are degassed and are then filled with a polymerizable monomer under the inert gas prior to mold assembly.

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