Method for producing contact lenses by centrifugal casting

Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Rotational molding

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264311, 425434, 425808, B29D 1100

Patent

active

046263888

ABSTRACT:
The invention pertains to a method for producing contact lenses by centrifugal casting in molds inserted as a vertical row into a rotating polymerization column.
According to this method of production, objects of cylindric shape, corresponding to the casting molds by the diameter and height, are inserted between the casting molds, whereas the ratio of weight to volume of these objects is larger than 3.

REFERENCES:
patent: 4516924 (1985-05-01), Rawlings
patent: 4517139 (1985-05-01), Rawlings et al.
patent: 4517140 (1985-05-01), Rawlings

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