Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Rotational molding
Patent
1992-08-03
1993-11-09
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Rotational molding
264 26, B29D 1100
Patent
active
052600017
ABSTRACT:
An improved process for spincasting contact lenses with differently shaped concave lens surfaces from the same mold design comprises providing molds with uniformly shaped concave surfaces, and spincasting in the molds a series of polymerizable mixtures. Contact lenses with differently shaped concave lens surfaces are obtained by varying the ratio of the monomers and an organic diluent in the polymerizable mixtures.
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Bawa Rajan S.
Nandu Mahendra P.
Bausch & Lomb Incorporated
Larson Craig E.
Lowe James
Thomas John E.
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