Method of lens casting without using a gasket
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 8, 2000
Grant Date -
N/A
app pub date -
Mar 19, 1999
filing date -
Mar 19, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for casting lens without using a gasket that can be used to form all powers and geometric shapes of lenses. An elastomeric strip is used to wrap around the edges of two molds to form a sleeve-like structure, which in turn cooperates with the molds to form a molding cavity. Moreover, this sleeve-like structure does not crumple or shrink during the lens polymerization process. Instead, it allows the molds to slide axially within it to compensate for any shrinkage that occurs during the lens polymerization process.
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