Method and apparatus for press sealing an arc tube body section
US4319906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1980 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Dec 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C27/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for press sealing a tubular quartz arc tube body section about a ribbon-type metallic seal. The method includes applying different intensities of heat to the quartz arc tube body section to be pressed in such a manner that four portions of the quartz arc tube body section which are located within diametrically opposed quadrant sections are heated to a higher softened-state temperature than those portions of the heated quartz arc tube body which are positioned intermediate the higher-heated quartz arc tube body portions, with the higher-heated quartz arc tube body portions collapsing somewhat due to the surface tension of the softened quartz. Utilizing this method results in an improved press seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.