Plastic article or earthenware shaping or treating: apparatus – Means applying electrical or wave energy directly to work – Radiated energy
Patent
1984-10-03
1986-02-04
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Means applying electrical or wave energy directly to work
Radiated energy
4251742, 4251744, 425808, 4251748E, 425446, 219 1055F, 264 25, 264 14, B29D 1100, H05B 906
Patent
active
045682623
ABSTRACT:
The invention concerns a method and an apparatus for manufacturing a contact lens, through molding within water-tight molds. The polymerization of lenses is insured by arranging a number of molds within one or several sealed metallic chambers (9) constituting a resonant cavity of a unique mode for an ultra high frequency wave; these molds are positioned in an area of the cavity where the electromagnetic field approximately of ultra high frequency waves is homogeneous, and are distributed so that the amounts of basic composition to be polymerized act as a load fitted to the inside of said cavity.
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patent: 3611582 (1971-10-01), Hamid et al.
patent: 4221948 (1980-09-01), Jean
patent: 4269581 (1981-05-01), Ury et al.
patent: 4276462 (1981-06-01), Kisman
patent: 4339648 (1982-07-01), Jean
Alcon Pharmaceuticals Limited
Flint, Jr. J. Howard
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