Controlled wafer relaxing in making composite lenses

Details Controlled wafer relaxing in making composite lenses Controlled wafer relaxing in making composite lenses

1983-09-01

1985-01-22

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

65 37, 156 99, 156106, 264 11, 264 17, 351159, 351166, 351177, B32B 1710

Patent

active

044950152

ABSTRACT:
Disclosed, in a method for preparing a preformed thermoplastic/thermoset wafer for lamination to a prefinished ophthalmic lens, the improvement comprising: storing the preformed thermoplastic/thermoset wafer immediately after manufacture under refrigerating conditions; and subjecting said stored wafer to a temperature of 90.degree. to 120.degree. F. at 50% to 70% RH for no more than 48 hours just prior to lamination of same to an ophthalmic lens.

REFERENCES:
patent: 2408540 (1946-10-01), Williams
patent: 3801397 (1974-04-01), Casserley
patent: 4103070 (1978-07-01), Ammons
patent: 4364786 (1982-12-01), Smith et al.

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