Method and apparatus for molding contact lenses and making their

Details Method and apparatus for molding contact lenses and making their Method and apparatus for molding contact lenses and making their

1995-02-02

1996-06-11

Coan, James F.

Package making

Methods

With contents treating

53122, 53453, 53561, 264 11, 264 25, 425808, B29D 1100

Patent

active

055244190

ABSTRACT:
An improved, automated method and apparatus for molding contact lenses generally comprises the steps of: (1) forming anterior and posterior mold cavities in longitudinally spaced relation in first and second webs of material, respectively; (2) dispensing a liquid, curable, lens material (e.g., monomer) in each anterior cavity of the first web; (3) aligning and bringing the posterior and anterior cavities into sequential, mating, centered engagement with each other; (4) curing the lens material captured between respective posterior and anterior molds; and (5) separating the webs to release the lenses cast therebetween. In an advantageous embodiment of the invention, the mold cavities are vacuum-formed in the respective webs, and packaging receptacles are formed in one or both of the webs used to mold the lenses.

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