Mold and method for spin casting a precisely configured article
US4680149A · kind A · utility
23Cited by
25References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved mold apparatus and spin casting method adapted for use in the molding of precisely configured articles, e.g., a contact lens, from a liquid polymerizable reaction mixture containing at least one volatile component is disclosed. Loss of this volatile component from the reaction mixture is prevented by providing a separate reservoir filled with a liquid volatile substance which volatilizes and fills the space above the liquid polymerization mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.