Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1992-12-21
1994-07-05
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 23, 264 25, 264 27, B29D 1100
Patent
active
053265050
ABSTRACT:
An apparatus and method for directing accelerated electrons to at least part of one surface of one ophthalmic mold piece prior to filling with monomer and lens polymerization. In particular it has been found that generation of the ionized oxygen by means of a corona treatment electrode sufficiently increases the adherence of the polymer to the mold piece so treated. In the preferred embodiment, the flange around the convex, male piece of the lens mold is corona treated so that when the mold pieces are separated after lens polymerization, the flashing of excess polymerized material surrounding the lens cavity adheres to that male, convex piece flange while the lens is removed with the female, concave piece.
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"Electrical Surface Treatment of Medical Plastics", Robert P. Wettermann; Medical Device & Diagnostic Industry, Oct. 1990, Cannon Communications, Inc.
"Corona Systems" Tantec, Inc. Brochure, Tantec, Inc. 630 Estes Ave. Schaumburg, IL 60193
Adams Jonathan P.
Heaton John C.
Rastrelli Edmund C.
Johnson & Johnson Vision Products Inc.
Lowe James
Petrow Joel R.
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