METHOD OF COATING AN OPHTHALMIC LENS USING A STAMP COATING
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United States of America Patent
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app pub date -
Dec 21, 2006
filing date -
Dec 21, 2005
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Abstract
A method to produce in-mold coated lenses, and the coated lenses produced by the method. A cliche (80a) with a measured amount of thermoset acrylate-based coating solution is provided on, or adjacent to, the parting line of an injection molding machine. An inflatable silicone bladder (70b) is dipped into the cliche to pickup a thin film of coating. The bladder is transported along a vertical axis or plane or other path to press the coating against the heated mold insert (46a). The bladder pauses while the coating pre-cures and the bladder is peeled off, leaving the coating on the mold insert. The mold is closed and a thermoplastic resin is injected into the mold cavity to form a coated ophthalmic lens.
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