Die cast battery cup and anvil

Claim 1

INA CARTRIDGE HAVING A HEAD END ADAPTED TORECEIVE A PRIMER IN A CONVENTIONAL MANNER, SAID PRIMER COMPRISING AN INTEGRALLY FORMED, UNITARY BATTERY CUP AND ANVIL INSERTABLE IN SAID CARTRIDGE HEAD, SAID UNITARY BATTERY CUP AND ANVIL COMPRISING A TUBULAR CASING HAVING A CONTINUOUS FLANGE MEANS INTEGRAL WITH AND PROJECTING INWARDLY FROM THE INNR WALL OF THE FORWARD PORTION OF SAID CASING, AN ELONGATED ANVIL INTEGRAL WITH SAID FLANGE MEANS AND PROJECTING REARWARDLY TOWARDS AN OPEN END OF SAID CASING, A PLURALITY OF WEAKENED WALL PORTIONS INTEGRAL WITH SAID FLANGE MEANS AND SAID ANVIL THUS PROVIDING AN INTEGRAL, IMPERFORATE CLOSURE FOR THE FORWARD END OF SAID CASING, AND A PRIMER CUP MEANS HAVING PRIMING MATERIAL MOUNTED THEREIN POSITIONED TO CLOSE OFF THE OPEN END OF SAID BATTERY CUP AND TO SPACE THE PRIMING MATERIAL A DESIRED DISTANCE FROM THE END OF THE ANVIL, SAID WEAKENDED WALL PORTIONS ADAPTED TO BE BLOWN OUT BY THE EXPLOSIVE PRIMING MATERIAL GASES USPON IGNITION, SAID WEAKENED WALL PORTIONS COMPRISING CURVED WALL PORTIONS OF PREDETERMINED THICKNESS WHICH, WHEN TAKEN TOGETHER WITH A CURVED BOTTOM PORTION OF SAID ANVIL FORM A HEMISPHERCAL DOME.