Method of producing a lens with an embedded foil
US11813814B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2022 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Dec 16, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2715/006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing a lens with an embedded foil, comprising the steps of positioning a foil (10) on a foil fixation holder, providing adhesive attachment dots (41) on the foil (10) on surface portions (12) opposite to the foil fixation holder, positioning the front mould (30) ensuring the contact of the attachment dots (41) with a surface (31) of the front mould (30), retracting the foil fixation holder and positioning a back mould (120) opposite to the front mould (30). Then the front mould (30) and the rear mould (120) are connected with a sealing bridging element (90) to build an assembly in order to form a mould cavity (45, 155) with a pouring opening, wherein the edge (11) of the foil (10) is spaced apart (112) from the bridging element (90) and the assembly comprises passages between the attachment dots (141), the foil (10) and the front mould backside (31) allowing pouring a monomer into the entire mould cavity (45, 155) before curing the monomer and decomposing the assembly as well as cutting the lens with the embedded foil from the polymer block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.