Contact lens mold
US4284399A · kind A · utility
105Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1980 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Jun 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Location of the mold parting line tangent to the lens edge substantially eliminates registration problems when a relief groove is provided at the edge of the female member. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.