Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1994-04-08
1996-11-12
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 23, 264 25, 264446, 264484, 264 85, 264 83, 264161, B29D 1100
Patent
active
055737153
ABSTRACT:
An apparatus and method for causing the polymerized excess monomer to separate from a molded lens by increasing the surface energy of the flange area of one mold piece, causing the polymerized excess monomer to stick thereto. Specifically when manufactured under inert atmosphere conditions, a particular manifold is needed to supply an oxygen bearing gas, air, to the area to be treated while preventing the oxygen from contaminating the lens manufacturing area of the molds or diluting the nitrogen atmosphere of other lens process areas. 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.
REFERENCES:
patent: 3423488 (1969-01-01), Bowser
patent: 4468184 (1984-08-01), Rawlings
patent: 4609507 (1986-09-01), Wichterle et al.
patent: 5236636 (1993-08-01), Tisack
patent: 5326505 (1994-07-01), Adams et al.
Adams Jonathan P.
Heaton John C.
Rastrelli Edmund C.
Wagner Thomas J.
Weber Kenneth J.
Johnson & Johnson Vision Products Inc.
Vargot Mathieu D.
LandOfFree
Method for treating an ophthalmic lens mold does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for treating an ophthalmic lens mold, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for treating an ophthalmic lens mold will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-560313