Method for molding plastic lenses
US6416689B1 · kind B1 · utility
4Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Mar 21, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2793/009
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method for making an optical lens which includes:filling a molding cavity vertically oriented and defined by two mold pieces at the periphery of which is disposed an annular closure member with a polymerizable synthetic composition through a disposable check valve provided in the closure member;polymerizing the composition to form the lens; andrecovering the lens with the disposable check valve imprisoned within the polymerized composition at the periphery thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.