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US 5,516,468 AGranted
Method for the production of plastic lenses
AssigneeQ2100, Inc.
InventorsN. Thornton Lipscomb, Omar M. Buazza, Stephen C. Luetke, John J. Robinson
Life of this patent
Estimating the term…
Abstract
The method includes disposing a liquid monomer or a monomer mixture and a photosensitive initiator into a mold cavity defined by mold members and directing ultraviolet light to act on the lens forming material in the cavity to produce a lens therefrom. The mold members are cooled by air.
Claims37
A method of making a plastic eyeglass lens, comprising:
- placing a polymerizable lens forming material in a mold cavity formed by at least a first mold member having a casting face and a non-casting face, and a second mold member having a casting face and a non-casting face;
- directing ultraviolet light toward at least one of the first and second mold members;
- and
- directing air from an air distributor towards at least one non-casting face of a mold member, the air distributor comprising an air jet having a substantially cylindrical bore, the bore having a plurality of openings disposed about the circumference thereof, and the air being directed from the openings toward the non-casting face of a mold member.
1 more element
A method of making a plastic eyeglass lens, comprising:
- placing a polymerizable lens forming material in a mold cavity formed by at least a first mold member having a casting face and a non-casting face, and a second mold member having a casting face and a non-casting face;
- directing ultraviolet light toward at least one of the first and second mold members;
- and
- directing air from an air distributor such that air flows from the edges to the center of a non-casting face of the first mold member, and from the edges to the center of a non-casting face of the second mold member.
1 more element
Dependencies are inferred from the claim text.