Asymmetric bladder compression for elimination of lamination defects on progressive addition lenses
US8920585B2 · kind B2 · utility
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2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2012 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Nov 19, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1028
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for elimination of lamination defects on progressive addition lenses. The lamination method uses a flexible bladder designed to apply pressure evenly across the lens surface. A spacer is positioned between a Hard Multi-Coat carrier and the flexible bladder. The spacer is located in a region of the carrier which is designated to deliver a coating to a section of the lens which is farthest from the carrier. The spacer asymmetrically increases the pressure applied to the carrier to eliminate lamination defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.