Method for making lenses
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United States of America Patent
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-
Nov 29, 1994
Grant Date -
N/A
app pub date -
Aug 19, 1992
filing date -
Aug 19, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for forming a preform mass of thermoplastic material into a lens without the formation of air bubbles or the entrapment of air pockets in the finished lens includes softening the preform mass under a predetermined pressure and temperature and continuing to apply the predetermined pressure while increasing the temperature until the mass has been compressed between two molds into the shape of the lens.
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Cited Art Landscape
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