Annular gasket for moulding lenses for organic material
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United States of America Patent
Stats
-
Feb 17, 1981
Grant Date -
N/A
app pub date -
Feb 21, 1980
filing date -
Feb 23, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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