COMBUSTION GAS CARTRIDGE FOR GAS FASTENING DEVICE

摘要

Combustion gas cartridge for a gas internal combustion fastening device, comprising an external casing (2) over which is crimped the edge (6) of an internal cup (5) beyond which an outlet end (8) projects. The external casing (2) is stepped and includes three longitudinal zones having different respective diameters, namely a first edge zone (9), a second bearing zone (10) for the head of a crimping machine having a smaller diameter than that of the edge zone (9) and a third zone (11) having a diameter equal to or greater than that of the edge zone (9) and forming an annular shoulder (12) together with the second bearing zone ( 10) for the crimping head.