Annular gasket for moulding lenses for organic material

Details Annular gasket for moulding lenses for organic material Annular gasket for moulding lenses for organic material

1980-02-21

1981-02-17

Flint, Jr., J. Howard

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

425808, 249187, B29D 1100

Patent

active

042514746

ABSTRACT:
An annular gasket for use in the moulding of ophthalmic or optical lenses of organic material, comprises two axially spaced ridges on its inner periphery arranged to cooperate tightly with two mould shells.
At least one of the annular ridges is formed at the end of an elastically deformable annular flange extending around the inner periphery at an angle to the axis of the gasket. The flange projects both from a corresponding transverse face of the gasket and from its internal peripheral face.

REFERENCES:
patent: 3136000 (1964-09-01), Slyk
patent: 3555610 (1971-01-01), Reiterman
patent: 3761208 (1973-09-01), Boudet et al.
patent: 4166088 (1979-08-01), Neefe

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