Patent ID: 6419859
Filing Date: 2002-07-16
Classification: B29C,B29D,B29L,Y10S

Abstract:
A mold assembly for forming an ophthalmic lens, or a lens blank from which one ophthalmic lens is produced by effecting a cutting operation on at least one of a front surface and a back surface of said lens blank, said mold assembly consisting of a first mold having a molding surface and a second mold having a molding surface, which first and second molds are assembled together so as to define therebetween a mold cavity having a profile corresponding to that of said ophthalmic lens or said lens blank, said mold cavity being filled with a polymeric material which is polymerized to form said ophthalmic lens or said lens blank, wherein the improvement comprises:at least one of said first and second molds being a layered mold which is constituted by a composite sheet comprising a metal sheet layer and at least one resin layer which are laminated on each other, said at least one resin layer of said composite sheet providing said molding surface of said layered mold which partially defines said mold cavity.