Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1991-02-28
1993-01-26
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 17, 264 27, 264 23, B29D 1100
Patent
active
051820536
ABSTRACT:
A process for forming an intraocular lens with haptics having high fracture toughness mixing solid particles with an uncured polymer matrix and introducing the uncured mixture into a mold. Ultrasonic energy is then applied to the mold until the uncured mixture begins to solidify. Sufficient heat is then applied to the polymer mixture to completely cure the polymer. The cured polymer which will form the haptics, is then removed from the mold and a hole for forming the optic is formed in the cured polymer. An uncured polymer matrix suitable for use, when cured, as an optic, is then introduced into the hole and cured. An intraocular lens is then machined from the resulting cured composition.
REFERENCES:
patent: 3454332 (1969-07-01), Siegel
patent: 4622184 (1986-11-01), Barnhart et al.
patent: 4638025 (1987-01-01), Fuhrman
patent: 4737322 (1988-04-01), Bruns
Plastics World, "Use of Ultrasonic Vibrations in Resin Compounding and Casting", Black et al., Feb. 1963, pp. 26-27 (264/23).
Creasman Edwin A.
McCullough Jimmy D.
Navarrete David R.
Paul Thomas R.
Soodjinda Churchai T.
Lowe James
Optical Radiation Corporation
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