Patent ID: 6257547
Filing Date: 2001-07-10
Classification: B29C,B29D,Y10S

Abstract:
A mold assembly for forming an ophthalmic lens, said mold assembly comprising a first mold and a second mold which cooperate with each other to define therebetween a mold cavity having a profile following that of said ophthalmic lens with said first and said second molds being held in line contact with each other at a predetermined radial position, wherein the improvement comprises:at least one of said first and said second molds consisting of a central molding portion located radially inwardly of said radial position, and an outer rim portion located radially outwardly of said radial position, said central molding portion of said at least one mold cooperating with the other mold to define therebetween said mold cavity when the two molds are assembled together; andsaid at least one mold having a mold surface which is opposed to a mold surface of the other mold when the two molds are assembled together, said mold surface of said at least one mold consisting of a central lens-forming region in said central molding portion, and an outer peripheral non lens-forming region in said outer rim portion, at least a part of said lens-forming region which is adjacent to said radial position being concave to the mold surface of said at least one mold, while at least a part of said outer peripheral non lens-forming region which is adjacent to said radial position being convex to the mold surface of said at least one mold.