Method of manufacturing a flat glass panel for a picture display device
US6021648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1998 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Apr 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2217/49264
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flat glass panel 1 for a picture display device of the flat type, is formed by two glass cover plates (3, 5) with at least one glass plate (4, 4', 4", . . . ) between them, and a vitreous frit (8) between the cover plates along the outer edges of the cover plates so as to obtain a box-type glass panel in which a channel structure is present. After heating to the melting temperature of the frit (8), the panel is cooled down to a transitional temperature of the frit, while the space between the cover plates is partly exhausted during the cooling-down phase at a temperature which lies between the melting temperature and the transitional temperature of the frit. Then the temperature is kept constant at approximately the transitional temperature until the frit has become undeformable, said space (13) between the cover plates (3, 5) being fully evacuated then. Finally, cooling-down continues to room temperature, and the space (13) inside the panel is hermetically sealed off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.