Method for manufacturing a fluorescent lamp
US5833506A · kind A · utility
0Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Nov 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Two arc tubes which are to be connected are held at different levels. Predetermined portions in the vicinity of an end of each arc tube are evenly heated and softened by a flame of a burner from the side. An air flow is supplied to blowing up the softened portion to form a semi-junction bridge having a circular cross-section and a flat connecting face. The thickness of the wall of the semi-junction bridge is even. The arc tubes having the semi-junction bridges are disposed on the same plane and one arc tube is moved to the other to connect the semi-junction bridges while the connecting faces are softened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.