Cathode ray tube
US4720748A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1985 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Apr 18, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/87
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a cathode ray tube which uses a tension band to afford an implosion protection. The cathode ray tube of this invention includes a panal (21) formed of a face portion (4) which is respectively formed as a curved surface and a skirt portion (5). A mold match line (23) of this panel (21) is formed so as to substantially follow the boundary between the face portion (4) and the skirt portion (5) and a tension band (29) for use in implosion protection is wound around this mold match line (23). Accordingly, the tension of the tension band can effectively be transmitted to the entire periphery of the face portion and thus the implosion protection of the panel can be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.