Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Composite or multiple layer
Reexamination Certificate
2005-12-21
2010-11-16
Crispino, Richard (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Composite or multiple layer
C264S002200, C264S002700, C264S255000, C425S808000, C351S159000, C351S177000
Reexamination Certificate
active
07833442
ABSTRACT:
A method for in-mold coating of an injection molded thermoplastic lens that resides in an injection molding machine oriented to a horizontal parting line. An optical lens is initially formed by injecting molten thermoplastic resin into an edge-gated lens-forming cavity held closed under a primary clamp force. The mold is opened at a time when the lens is rigid enough to retain its shape. An unpressurized full metered charge of coating is applied onto the center of the lens. The coating is co-molded by ramping up the clamp force from zero to a secondary clamp force less than the primary clamp force to compress the coating into a uniformly thick, fringe-free layer.
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Chen Xu
Lockwood Matthew
Yang Hsinjin
Bell William P
Crispino Richard
Essilor International "Compagnie Generale d'Optique"
Keusey & Associates, P.C.
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