Mold assembly for forming ophthalmic lens, method of producing the same, and method of producing ophthalmic lens using the mold assembly
US6315929A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | May 10, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mold assembly for forming an ophthalmic lens, the 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 the ophthalmic lens, wherein the improvement comprises: at least one of the first and second molds being a coated mold consisting of a body portion including a backing surface having rigidity and mechanical strength enough to withstand a molding operation for forming the ophthalmic lens in the mold cavity, and a thermoplastic film retained on the body portion such that the thermoplastic film covers the backing surface of the body portion, the thermoplastic film having a molding surface which partially defines the mold cavity and which gives a corresponding one of opposite surfaces of the ophthalmic lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.