Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Rotational molding
Patent
1986-05-19
1987-07-14
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Rotational molding
264311, 425425, 425434, 425808, B29D 1100
Patent
active
046801499
ABSTRACT:
An improved mold apparatus and spin casting method adapted for use in the molding of precisely configured articles, e.g., a contact lens, from a liquid polymerizable reaction mixture containing at least one volatile component is disclosed. Loss of this volatile component from the reaction mixture is prevented by providing a separate reservoir filled with a liquid volatile substance which volatilizes and fills the space above the liquid polymerization mixture.
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Chang Robert
Glick Robert E.
Rawlings David L.
Dilworth Peter G.
International Hydron Corporation
Lowe James
Pirri Vincent P.
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