Cartridge

Claim 1

A blank cartridge comprising: a casing, means closing said casing at one end, a primer at said one end, said casing having an annular reverse roll at its opposite end and a reverse direction inner tubular section extending in unitary relation with and rearwardly from said annular reverse roll, said casing forming a star-crimp closure extending across the inner end of said inner tubular section, and spaced from said one end, of said inner tubular section, frangible wadding disposed within said casing, adjacent and rearwardly of said star-crimp closure, and an ignitable main powder charge disposed between the closed one end of said casing and said frangible wadding, said frangible wadding being essentially the only effective longitudinal motion restrainer between said star-crimp closure and said main powder charge, said frangible wadding and said reverse roll end and inner tubular section and star-crimp closure being of a combined longitudinal restraining strength to effect retention of said main powder charge up to a pressure within said casing for said main powder charge to effect substantially full ignition and burning thereof, said star-crimp being severable upon full burning pressure by said main powder charge and said inner tubular section and reverse roll being unrollable to straight tubular form under such full burning pressure, said frangible wadding being essentially disintegrable to minute particle size upon firing of said main charge and expulsion thereof into the atmosphere by the firing of said charge.