Mold for forming a contact lens and method of preventing formation of small strands of contact lens material during contact lens manufacture
US7156641B2 · kind B2 · utility
13Cited by
110References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Feb 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention provides a mold for forming a contact lens comprising an overflow collector, which causes the overflow reactive mixture to be accumulated, and not to spread out as it would upon the typically flat surface of a prior art mold. This invention further provides a method of preventing the formation of contaminating pieces of overflow reactive mixture comprising the step of: preventing the overflow reactive mixture from spreading out on the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.