Precision forged cartridge case
AssigneeThe National Machinery Company
InventorsThomas E. Hay, Jeffrey W. Carper, Stanley J. Wasserman
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Abstract
An improved cartridge case completely produced net shape on a progressive cold former that includes a trim to lengthy station with an internal shearing tool.
Claims5
A method of making a cartridge case on a single progressive forming machine comprising cold forming an elongated round wire blank with tools that increase its diameter and form holes on each of its ends and an intermediate web between the holes, drawing a part of the blank having one of the holes into a thin wall to form a cavity for eventually receiving a charge and a bullet, trimming a free end of the drawn thin wall while the blank is supported in the machine to obtain a uniform edge and upsetting the blank at the other hole in a segmented die that confines the blank to the finished shape of a cartridge case head including an ejector groove.
Dependencies are inferred from the claim text.