Apparatus for making ophthalmic lenses by vacuum lamination
US6106665A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Nov 19, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2551/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus is provided for making ophthalmic lenses by vacuum lamination wherein a front lens wafer (20) is laminated to a back lens wafer (22) with a layer of adhesive (24) disposed within the interface between the two wafers forming a composite lens (18). An upper flexible, transparent sheet (12) is located on the top side of the composite lens (18), a lower flexible, opaque or transparent sheet (14) is located on the bottom side of the composite lens, and an approximately air-tight enclosure (16) is formed between the sheets for receiving the composite lens. A vacuum pump (36) draws the upper and lower flexible sheets into engagement with the composite lens to press the wafers together. A UV lamp (38) transmits radiation through the upper flexible sheet (12) and into the adhesive layer to cure the adhesive and form the composite lens (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.