Method of manufacturing a lens presenting a graded tint
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United States of America Patent
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Issued Date -
Nov 6, 2003
app pub date -
Apr 22, 2003
filing date -
May 2, 2002
priority date (Note) -
Abandoned
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Abstract
A method of manufacturing a lens presenting a graded tint, the lens comprising first and second layers each of which is made of a thermoplastic material, with only one of the layers being colored in the tint concerned, the method comprising the steps of: injecting the thermoplastic material of the first layer into a first mold cavity in order to form the first layer; and placing the first layer in a second mold cavity and injecting therein the thermoplastic material of the second layer so as to form the second layer on the first layer.
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