Process for covering a tube with a foil, and an igniter element produced by said process
US5035179A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1990 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Jun 18, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/282
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
For the purpose of welding one side of a metallic foil to a relatively thick-walled metal tube, it is proposed to cover the foil from the other side in an annular fashion with a similar or identical tube section also made of metal and to join the tube and the tube section from the outside by means of welding, e.g., plasma welding; in this procedure, the welding bond is not allowed to extend through the entire tube wall thickness. In this way, tubular elements such as cylindrical casings of primer caps can be made tight, which primer caps can be filled from the front in a simple way, but wherein it has thus far been difficult to test for the reliability of the cover formed over a primer charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.