Apparatus for the manufacture of contact lenses using microwave energy
US4568262A · kind A · utility
20Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Oct 3, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a method and an apparatus for manufacturing a contact lens, through molding within water-tight molds. The polymerization of lenses is insured by arranging a number of molds within one or several sealed metallic chambers (9) constituting a resonant cavity of a unique mode for an ultra high frequency wave; these molds are positioned in an area of the cavity where the electromagnetic field approximately of ultra high frequency waves is homogeneous, and are distributed so that the amounts of basic composition to be polymerized act as a load fitted to the inside of said cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.