Method for adding a thermoset overmold layer to a lens...

Details Method for adding a thermoset overmold layer to a lens... Method for adding a thermoset overmold layer to a lens...

2007-06-20

2010-10-26

Del Sole, Joseph S (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

C264S328700

Reexamination Certificate

active

07820082

ABSTRACT:
A method and coating used to prepare a photochromically-enabled bifocal ophthalmic lens. The method and equipment includes injection molding a single vision lens, for example, from polycarbonate. The clamp opens vertically and the top insert is exchanged for a bifocal mold having a base curve similar to the single vision lens. The thermoset coating includes compounds from several acrylate classes, and is applied to the single vision lens. The coating may include a photochromic dye. The coating is also formulated to receive a photochromic solution through an imbibition process.

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