Process and apparatus for casting lenses

Details Process and apparatus for casting lenses Process and apparatus for casting lenses

1987-11-09

1990-07-31

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 22, 264 25, 264 402, 425135, 425150, 4251744, 425808, B29D 1100

Patent

active

049448994

ABSTRACT:
A process for casting lenses using male and female mold halves, which includes placing a polymerizable liquid into the female mold, introducing the male mold down into the female mold until the male mold touches the surface of the liquid and then allowing the male mold to fall into the female mold. Also, an apparatus suitable for carrying out the casting process is provided which includes a horizontal support for the female mold, a holder for releasably holding the male mold, a mechanism for moving the holder down towards and into the female mold and a mechanism for detecting contact between the male mold and the surface of the liquid and causing the holder to then release the male mold. The molds are maintained under a predetermined closing pressure during curing by spot welding their flanges together while under that pressure.

REFERENCES:
patent: 2332674 (1943-10-01), Smith
patent: 3005234 (1961-10-01), Oriani et al.
patent: 3423488 (1969-01-01), Bowser
patent: 3894710 (1975-07-01), Sarofeen
patent: 4113224 (1978-09-01), Clark et al.
patent: 4402659 (1983-09-01), Greenbaum
patent: 4440699 (1984-04-01), Smid et al.
patent: 4469646 (1984-09-01), Rawlings
patent: 4540532 (1985-09-01), Petcen et al.
patent: 4565348 (1986-01-01), Larsen
patent: 4623496 (1986-11-01), Verhoeven et al.

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