Apparatus and method for making cast ophthalmic lenses

Details Apparatus and method for making cast ophthalmic lenses Apparatus and method for making cast ophthalmic lenses

1980-05-30

1981-07-21

Lowe, James B.

Static molds

Container-type molding device

Including means securing molding device to detachable,...

249155, 249157, 249169, 264 18, 264 25, 425808, B29D 1100

Patent

active

042794013

ABSTRACT:
Cast multifocal lenses are produced from ledged casting pieces molded from a master die having a molding surface made up of juxtapositioned die components each precision surfaced to a curvature and finish corresponding to a multifocal surface desired to be cast upon a lens and relatively prearranged according to desired height and position of cast lens ledging.

REFERENCES:
patent: 3109696 (1963-11-01), Whitney
patent: 3273204 (1966-09-01), Craddock
patent: 3423488 (1969-01-01), Bowser
patent: 3649236 (1972-03-01), Rosenbauer
patent: 3946982 (1976-03-01), Calking et al.

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