Method for molding ophthalmic lenses made of plastic material
US6579476B2 · kind B2 · utility
2Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for molding a plastic ophthalmic lens which comprises introducing a liquid polymerizable composition in a molding cavity of a two-piece mold through a filling nozzle in flow communication with the upper half of the molding cavity and spaced apart from the central vertical axis of the molding cavity up to the time the lower half of the molding cavity is filled. Then, tilting the mold to bring the filling in register with the central axis of the molding cavity and achieving full filling of the molding cavity. Thereafter, polymerizing the composition and recovering the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.