Shadow mask with plurality of recessed regions extending across mask in two directions
US4048536A · kind A · utility
7Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1976 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A shadow mask for a colored TV picture tube contains the conventional foraminous or translucent area formed by multiple vertical rows of miniature apertures or slits with the improvement being a pattern set of recesses which are located between the rows of slits and which extend into the margin of the mask. Because of the patterned set of recesses, doming the mask can be accurately and smoothly accomplished for insertion into the envelope of a colored television picture tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.