CARTRIDGE

摘要

A cartridge (1) is provided which includes an elongate tube (3) having a central body (5) that is closed at each end (11, 13) and containing a gas producing substance (30) therein. The tube (3) is made from a plastics material that is capable of outward deformation and a band (15) of an elastically deformable material is provided about the tube (3) adjacent each closed end. The tube (3) is configured such that internal pressure in the tube (3) caused by initiation of the gas producing substance (30) results in outward deformation of the body (5) and each band (15) and subsequent rupture of the body (5) prior to the closed ends being ruptured or opened.

主权项

1. A cartridge which includes an elongate tube having a central body closed at each end and containing a gas producing substance, wherein the tube is made of a plastics material capable of outward deformation, with a band of an elastically deformable material provided about the tube adjacent an end that is to be stemmed and configured so that, in use, internal pressure in the tube caused by initiation of the gas producing substance results in outward deformation of the body and the band being effectively urged into sealing contact with a surrounding wall of a borehole to stem the borehole prior to any subsequent rupture of the elongate tube or dislodgement of any closure from the tube.