Cathode ray tube and method of manufacturing same
US6054805A · kind A · utility
2Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/263
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a cathode ray tube includes the steps of providing a stem with a flange having an outer diameter smaller than an inner diameter of a bottom end of the neck, performing a sealing operation between the stem and the neck in such a state that a bottom side of the flange is in a position, externally distant from the bottom end of the neck less than a thickness (mm) of the flange while internally distant from it less than twice the thickness of the flange, and moving the stem downward during the sealing operation so as to elongate the sealed portion of the neck, thereby preventing it from being deflated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.