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US 6,576,167 B1Granted
Methods and apparatus for eyeglass curing using ultraviolet light and improved cooling
AssigneeQ2100, Inc.
InventorsOmar M. Buazza, Stephen C. Luetke, Galen R. Powers
Life of this patent
Estimating the term…
Abstract
Method and apparatus for making and coating a plastic lens. Oxygen barrier containing photoinitiator is used to cure incompletely cured lens portions. Radiation pulses are used to control lens curing rate. Lens is posted while in a mold cavity using a conductive heat source. Air may be directed toward the mold cavity to help remove heat form the lens. An in-mold scratch resistant coating may be formed from two separate material which both contain a photoinitiator.
Claims28
A method for making an eyeglass lens, comprising:
- placing a first coating composition within a mold member, the mold member comprising a casting face and a non-casting face, the first coating composition comprising a photoinitiator and at least one ethylenically unsaturated component, wherein the first coating composition is curable upon exposure to ultraviolet light;
- spinning the mold member to distribute the first coating composition over the casting face;
- directing ultraviolet light at the mold member to cure at least a portion of the first coating composition;
- placing a second coating composition within the mold member, the second coating composition comprising at least one ethylenically unsaturated component and a photoinitiator, wherein the second coating composition is curable upon exposure to ultraviolet light;
- spinning the mold member to distribute the second coating composition over the portion of the first coating composition that has been cured;
- directing ultraviolet light at the mold member, thereby curing at least a portion of the second coating composition and forming a substantially clear combination coat comprising at least a portion of each of the first and second coating composition;
- assembling the mold member with a second mold member to form a mold having a cavity between the mold members;
- placing a lens-forming composition with the cavity, the lens-forming composition comprising a photoinitiator and being curable upon exposure to ultraviolet light;
- and
- directing ultraviolet light at the mold to cure at least a portion of the lens-forming material to form a lens and wherein the combination coat adheres to the cured portion of the lens-forming material.
7 more elements
Dependencies are inferred from the claim text.