Apparatus and method for releasably fusing mold lens pieces

Details Apparatus and method for releasably fusing mold lens pieces Apparatus and method for releasably fusing mold lens pieces

1996-12-06

1998-06-02

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1565802, 264 11, 264 127, 264 27, 264445, 4251742, 425808, B29D 1100

Patent

active

057593183

ABSTRACT:
A method and apparatus for releasably securing mold pieces used to mold an artificial eye lens, for example a hydrophilic contact lens. The apparatus includes an ultrasonic welding system to provide directed energy, modified so that the output horn is convex to extend within the outer concave portion of one of the mold pieces and has a shoulder to rest upon the flange of said piece thereby centering it. The method applies directed energy, such as ultrasonic vibrations, through the energy emitter horn to soften or melt then fuse the mating peripheral edge portion of the lens mold pieces.

REFERENCES:
patent: 3899378 (1975-08-01), Wragg et al.
patent: 4529473 (1985-07-01), Mims
patent: 5135592 (1992-08-01), Melvin
patent: 5152788 (1992-10-01), Isaacson et al.
patent: 5518578 (1996-05-01), Persells et al.
patent: 5593620 (1997-01-01), Galas
patent: 5648024 (1997-07-01), Galas

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