Method of making plastic cartridge casing
AssigneeRemington Arms Company, Inc.
InventorsGeorge R. Eckstein, William G. Moyher
Life of this patent
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Abstract
A method of making a primer seal for a one-piece plastic shotgun shell, i.e. where the tubular body and base portion are integral, by extruding a ring of plastic around the primer opening and then forcing the plastic ring inside the primer opening to form a continuous, annular, gas sealing ring of plastic within the primer opening.
Claims1
A method of making a primer seal for a plastic shotgun shell comprising forming of a tubular plastic body having an integral transverse base portion with a longitudinally extending primer opening therein, extruding a collar of plastic around the primer opening which projects rearwardly from the rear face of the base portion to establish a volume of plastic at the correct radial distance from the axis of the shell, forcing said plastic collar forwardly so as to position the plastic material of said collar inside said primer opening so as to form a continuous, annular gas sealing ring of oriented plastic which is integral with and has a smaller diameter than the remaining side wall of the primer opening.
Dependencies are inferred from the claim text.