Process for covering a tube with a foil, and an igniter element

Details Process for covering a tube with a foil, and an igniter element Process for covering a tube with a foil, and an igniter element

1990-06-18

1991-07-30

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

Electrical primer or ignitor

F42C 1910

Patent

active

050351796

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.

REFERENCES:
patent: 520116 (1894-05-01), Mason
patent: 1163937 (1915-12-01), Macomber
patent: 2240438 (1941-04-01), Durant
patent: 2868128 (1959-01-01), Ramsey
patent: 3295446 (1967-01-01), Harnau
patent: 4103619 (1978-08-01), Fletcher et al.

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