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Method for manufacturing lenses

  • US 4,873,029 A
  • Filed: 10/30/1987
  • Issued: 10/10/1989
  • Est. Priority Date: 10/30/1987
  • Status: Expired due to Term
First Claim
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1. A method for tinting plastic lens comprising:

  • (a) arrange a first mold form for receiving molding material;

    (b) delivering plastic molding material to said first mold form;

    (c) inserting a tinted wafer of solidified plastic material capable of intermolecular bonding with said plastic molding material into said first mold form in contiguous relationship with said plastic molding material;

    (d) fixing a second mold form in sealed relationship with said first mold form to form a mold having a cavity between said wafer and said second mold form;

    (e) inserting additional plastic molding material into said mold cavity;

    (f) said mold forms configured to form a lens of preselected shape;

    (g) subjecting said mold to oven curing process to solidify the plastic molding material and to cause intermolecular bonding between the molding material and the wafer; and

    (h) removing said molded material from said mold with said wafer in the form of a lens.

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