Tray for use in manufacturing contact lenses
US10029430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2017 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Aug 24, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0041
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tray (20) for holding contact lens mold assemblies (70) during thermal curing of a contact lens precursor material in an oven (210) to form contact lenses. The tray (20) comprises a plurality of plates (60) and a frame (25) supporting the plates (60). The frame (25) is configured to be stacked vertically with a plurality of identical frames to form a tray stack (10). Each plate (60) is a carbon-fiber reinforced polymer plate and comprises a plurality of support structures (110) each arranged to support one contact lens mold assembly (70) during curing and a plurality of channels (90, 100) connecting the support structures (110), to allow gases to flow between them in the tray stack (10) during curing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.