Production of color selection mechanism for cathode-ray tube
US4746315A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Jun 23, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0788
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process of producing a color selection mechanism for a cathode-ray tube which eliminates operations such as heat treatment at a high temperature for annealing and processing with levellers, to simplify production steps and resolves problems of rejects and dependability due to segregation of components involved in the stamping operation of a conventional process. A color selection electrode having a plurality of electron beam-passing openings formed therein is merely bent within the elastic limit of the material of the electrode, without causing a drawing effect, into a curved facial shape having substantially a cylindrical face as a basic facial shape thereof, and is permanently mounted in the curved condition on a frame to form a color selection mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.