Molded multifocal lens and mold assembly
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United States of America Patent
Stats
-
Apr 10, 1984
Grant Date -
N/A
app pub date -
Mar 24, 1980
filing date -
Mar 24, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lens having a set of physical features provided on the edge thereof for permitting a set of reference marks to be placed on the lens surface together with an apparatus for applying these physical features to the lens. The apparatus comprises a mold assembly in which the gasket is provided with a plurality of precisely located ridges which define a plurality of corresponding notches formed on the edge of the lens to locate, for example, the distance portion optical center and the 0.degree.-180.degree. lines of a progressive power lens. The gasket is additionally provided with other ridges adapted to mate with grooves formed on the mold member defining the progressive lens surface to ensure proper alignment of that member with the gasket.
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Family
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Cited Art Landscape
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