Method for fabricating cathode structure for cathode ray tube
US6626726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Jan 15, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49812
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for fabricating an indirectly-heated cathode structure including inserting a heater into a mold, injecting a thermoplastic resin into the space of the mold to embed the heater in the thermoplastic resin, inserting the heater embedded in the thermoplastic resin into a sleeve having a cap on an end, connecting the sleeve and the heater using a support body to assemble a cathode structure, and heating the cathode structure to remove the thermoplastic resin from the cathode structure. Therefore, in an indirectly-heated cathode structure, deviation of a heater from a center position in a sleeve can be prevented, and it is easy to adjust the gap between a heater, a sleeve, and a cap. Thus, the heater can be positioned at a desired position inside the sleeve, preventing current leakage due to a breakdown in the heater. In particular, the sleeve and the cap can be uniformly heated, reducing a local difference in thermion emitting density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.