Method and apparatus for making glass sheet
US9676650B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 27, 2012 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Mar 27, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/091
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method for producing a glass sheet by down-drawing includes an air pressure controlling step of controlling the air pressure of a furnace outside space formed between a furnace and a covering part that covers the furnace, the furnace including a forming furnace and a lehr, a melting step of melting glass raw materials to form molten glass, a supplying step of supplying the molten glass to a forming cell disposed inside the forming furnace, a forming step of forming a glass sheet by allowing the molten glass to flow down the forming cell, an annealing step of cooling the glass sheet while allowing the glass sheet to flow in one direction in the lehr, and a cutting step of cutting the glass sheet that has been cooled. In the air pressure controlling step, air pressure is controlled such that the air pressure is higher, inside the furnace outside space, at a position more toward the upstream side of the flow direction of the glass sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.