BRIEF DESCRIPTION OF THE DRAWINGS [0014]FIG. 1 is a longitudinal sectional view through a gas generator according to the invention; [0015]FIGS. 2a and 2 b are a top view and a perspective view of a first embodiment of the insert that can be used with the gas generator according to the invention; [0016]FIG. 2c is a top view of the membrane with a tear line that is formed by the insert according to