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AssigneeDynamit Nobel Aktiengesellschaft
InventorsKurt Ballreich, Hans Umbach, Jurgen Ahlborn, Wolfgang Reuter
Estimating the term…
A cartridge case and a process for the production thereof wherein the cartridge case includes an elongated tubular member and a separate bottom part. The separate bottom part is insertable in said elongated tubular member such that at least a portion of the wall surfaces of said bottom part and said tubular member contact one another and at least one of said separate bottom part and said elongated tubular member in the region of the wall surfaces to be contacted is provided with transfer elements. The transfer element means are responsive to ultrasonic energy for joining said bottom part and said elongated tubular member together such that a cartridge case is formed especially utilizable as a shot cartridge case.
A cartridge case comprising an elongated tubular member and a separate bottom part, said separate bottom part being insertable in said elongated tubular member such that at least a portion of the wall surfaces of said bottom part and said tubular member contact one another, at least one of said separate bottom part and said elongated tubular member in the region of the wall surfaces to be contacted being provided with transfer element means, said bottom part being provided with a rear surface extending transversely to the wall surface thereof, said elongated tubular member and said separate bottom part being formed of synthetic resin materials of different density, said transfer element means being responsive to ultrasonic energy for joining said bottom part and said elongated tubular member to form a gas-tight and firm bond therebetween without disadvantageously altering the strength and shape of said bottom part and said elongated tubular member to enable withstanding of the gas pressures occurring within the cartridge case during firing.
A process for the production of a cartridge case comprising the steps of forming an elongated tubular member and a separate bottom part, at least one of the tubular member and the bottom part being provided with transfer elements on the wall surface thereof arranged for contact upon insertion of the bottom part into the tubular member, the bottom part being formed with a rear surface extending transversely to the wall surface thereof, inserting the bottom part into the tubular member, and applying ultrasonic energy only to the rear surface of the bottom part in the longitudinal direction of the tubular member for causing the transfer elements to form a welded, gas-tight joint between the bottom part and the tubular member at least in the region of the transfer elements without disadvantageously altering the strength and shape of the bottom part and tubular member to enable withstanding of the gas pressures occurring within the cartridge case during firing.
Dependencies are inferred from the claim text.