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Gasket and mold assembly for producing plastic lenses

  • US 6,698,708 B1
  • Filed: 03/30/2000
  • Issued: 03/02/2004
  • Est. Priority Date: 03/30/2000
  • Status: Expired due to Term
First Claim
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1. A gasket configured to engage a first mold set for forming a first lens of a first power, the first mold set defining a mold cavity for receiving a lens forming composition, the gasket comprising at least four discrete projections for spacing mold members of the first mold set, wherein the projections are arranged on an interior surface of the gasket;

  • wherein the projections form an oblique angle with a steep axis and a flat axis of a mold member of the first mold set; and

    wherein the gasket further comprises a fifth projection positioned such that the fifth projection contacts a mold member of the first mold set, and wherein the fifth projection extends into the mold cavity when the gasket engages the first mold set.

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