Cartridge end closure using a disc of resilient, closed-cell...

Details Cartridge end closure using a disc of resilient, closed-cell... Cartridge end closure using a disc of resilient, closed-cell...

F - Mech Eng,Light,Heat,Weapons

42

B

102/11

F42B 3/00 (2006.01) B65D 39/00 (2006.01) F42B 3/24 (2006.01)

Patent

CA 1146803

- 7 - Abstract: Cartridge end-closure A tubular explosives cartridge having at least one end closed by a transverse closure disc of resilient closed-cell foamed synthetics plastics material, for example, foamed polyethylene, the disc having an uncompressed diameter greater than the internal diameter of the tubular cartridge case. The closure provides a waterproof seal without preventing communication of detonation between cartridges and may be readily pierced for the in- sertion of a detonator. When the closure consists of nitrogen blown polyethylene, it does not increase the risk of firedamp ignition in coal mines.

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