Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Including step of mold making
Patent
1991-05-28
1993-02-09
Frinks, Ronald
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Including step of mold making
264 11, 623 6, 623901, 156182, B29D 1100, A61F 216
Patent
active
051851075
ABSTRACT:
A lens, having an optical power surface, which may have multiple radii portions or aspherical portions as well as spherical portions, is molded in a coined mold. A pair of core pins, positioned within the mold cavity during the lens forming process, will produce a pair of haptic-mounting holes within the lens. As the lenses are subsequently tumbled to remove flash, indentations will form adjacent to the haptic-mounting holes. These indentations allow for tangential attachment of the haptic to the lens which, in turn, enables maximum flexibility without exceeding the width of the optic.
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Frinks Ronald
Iovision, Inc.
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