Gas filtering device for air bag gas generator

In a filtering device for removing particulate matter from an exhaust stream of a pyrotechnic gas generator for the inflation of an air bag which comprises a filtering body having parallel spaced apart side surfaces, one of which is exposed to a transversely directed exhaust gas stream of said gas generator and the other of which is adjacent an exhaust port of said gas generator, said filtering body having parallel spaced apart end surfaces which bear against metal surfaces within said gas generator to effect a partial seal therewith, the improvement which comprises a sheet formed of compressed particles of a combination of intercalated unexfoliated graphite and exfoliated flexible graphite positioned in a gasket relationship on the end surfaces of the filtering body so that said sheet bears against said metal surfaces.