Three stage forming station and method for forming a hot glass sheet with transverse curvature
US9452948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2014 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | May 11, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B35/202
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass sheet three stage forming station utilizes first and second upper molds and a lower mold to provide three stage forming. The glass is curved on the upper mold in the first stage but retains straight line elements transverse to the curvature. Transfer of the initially formed glass sheet from the first upper mold to the lower mold then provides the second stage of gravity forming and the glass sheet is then press formed between the second upper mold and the lower mold in the third stage which reduces optical distortion in the central viewing area of the formed glass sheet. The glass sheet is moved horizontally on the first upper mold and released onto the lower mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.