Shadow mask support frame for a cathode-ray display tube
US6528933B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2000 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Feb 22, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A shadow mask support frame for a cathode-ray color display tube of generally rectangular shape in top plan view. The shadow mask support frame includes two end upstands, which are located opposite each other and which are intended to support a shadow mask, and two lateral upstands, which are intended to keep the end upstands apart or separated from each other. The end upstands and the lateral upstands are of generally tubular shape and constitute an almost continuous closed hollow body containing at least one plane closed line located entirely inside the hollow body and passing inside each of the end and lateral upstands. It may be produced by folding a single metal strip or by fitting two drawn shells together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.