METHOD OF MANUFACTURING RIMLESS EYEGLASS LENS AND METHOD OF MANUFACTURING RIMLESS EYEGLASSES
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United States of America Patent
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Jun 1, 2017
app pub date -
Nov 30, 2015
filing date -
Nov 30, 2015
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Abstract
A method of manufacturing a rimless eyeglass lens includes: providing a lens-forming mold assembly that Includes first and second molds cooperatively defining a lens-forming cavity, the second mold including a base and at least two pin units mounted on the base, each of the pin units including at least one pin that projects from the base toward the first mold; injecting a molten plastic material into the lens-forming cavity under an injection pressure while maintaining the first and second molds at a melting temperature of the plastic material; and cooling the molten plastic material to form a rimless eyeglass lens having a shape corresponding to that of the lens-forming cavity and being formed with two through-hole units corresponding to the pin units.
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