Disposable compressed gas cartridge with integral sealing member

A disposable compressed gas cartridge in combination with a compressed gas consuming device having a charging pin extending in a longitudinal direction and a seat surface about the charging pin which is transverse to the longitudinal direction, the disposable compressed gas cartridge consisting solely of:

• i) a cartridge envelope which extends longitudinally between a first end and a second end thereof, the cartridge envelope including:
• a generally cylindrical wall portion defining a hollow chamber therein;
• an end wall portion enclosing the generally cylindrical wall portion at the first end of the cartridge envelope;
• a neck portion formed on the generally cylindrical wall portion at the second end of the cartridge envelope in which the neck portion defines a neck passage therethrough in communication with the hollow chamber of the generally cylindrical wall portion, the neck portion having a cylindrical portion of prescribed diameter locating an outermost end face of the envelope thereon;
• and
• a membrane spanning across the neck passage of the neck portion at the outermost end face of the envelope such that the cartridge envelope is arranged to contain gas under pressure therein, the membrane being arranged to be punctured by the charging pin of the compressed gas consuming device;
• and
• ii) a resilient sealing member supported entirely on the outermost end face of the cartridge envelope by adhesive between the resilient sealing member and the outermost end face of the cartridge envelope such that an outer diameter of the resilient sealing member is equal to the prescribed diameter of the cylindrical portion of the neck portion of the cartridge envelope, the resilient sealing member further comprising an external sealing surface which is arranged to abut the seat surface about the charging pin of the compressed gas consuming device when puncturing the membrane with the charging pin.