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US 5,928,575 AGranted
Methods for eyeglass lens curing using ultraviolet light
AssigneeQ2100, Inc.
InventorOmar M. Buazza
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 postcured while in a mold cavity using a conductive heat source.
Claims35
A method for making a plastic eyeglass lens, comprising:
- placing a liquid polymerizable lens forming composition in a mold cavity defined by at least a first mold member and a second mold member;
- directing first ultraviolet rays toward at least one of the mold members to cure the lens forming composition so that it forms a lens with a back face, edges, and a front face;
- after the lens is formed, applying a mold member of the mold cavity to a substantially solid conductive heat source;
- and
- conductively applying heat to a face of the lens by (a) conductively transferring heat to a face of a mold member from the conductive heat source, and (b) conductively transferring heat through such mold member to the face of the lens.
2 more elements
A method for making a plastic eyeglass lens, comprising:
- placing a liquid polymerizable lens forming composition in a mold cavity defined by at least a gasket, a first mold member, and a second mold member;
- directing first ultraviolet rays toward at least one of the mold members to cure the lens forming composition so that it forms a lens with a back face, edges, and a front face;
- shaping a flexible member such that it substantially conforms to a face of a mold member;
- applying a mold member of the mold cavity to the flexible member, the flexible member being on top of a conductive heat source;
- conductively applying heat to a face of the lens by (a) conductively applying heat to a face of a mold member from the conductive heat source, and (b) conductively transferring heat through such mold member to the lens.
2 more elements
Dependencies are inferred from the claim text.