Apparatus for making ophthalmic lenses by vacuum lamination

Details Apparatus for making ophthalmic lenses by vacuum lamination Apparatus for making ophthalmic lenses by vacuum lamination

1996-03-22

1999-01-12

Crispino, Richard

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Automatic and/or material-triggered control

1563796, 1563798, 156382, B32B 3104, B32B 3128

Patent

active

058581634

ABSTRACT:
An apparatus is provided for making ophthalmic lenses by vacuum lamination wherein a front lens wafer is laminated to a back lens wafer with a layer of adhesive disposed within the interface between the two wafers forming a composite lens. An upper flexible, transparent sheet is located on the top side of the composite lens, a lower flexible, opaque or transparent sheet is located on the bottom side of the composite lens, and a seam is formed between the upper and lower flexible sheets which defines an evacuation chamber between the sheets for receiving the composite lens. A vacuum pump is connected in fluid communication with the evacuation chamber for evacuating air from the chamber and in turn drawing the upper and lower flexible sheets into engagement with the top and bottom sides of the composite lens, respectively, to press the lens wafers together and spread the adhesive throughout the wafer interface. A UV lamp is mounted above the composite lens for transmitting UV radiation through the upper flexible sheet and into the adhesive layer to cure the adhesive and form the composite lens.

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