Cartridge casing
OwnerRene Gerard Hugonetinventor
Life of this patent
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Abstract
Cartridge cases of the type which receive powder, a wadding and shot pellets are comprised of thermoplastic material and have a metal head. The head is joined to the plastic case body in an operation wherein heat and pressure are applied to cause the plastic material to flow both outwardly into the interior of a rim portion of the metal head and also inwardly into an annular recess defined in part by an internal reinforcing section of the case body. The reinforcing section of the case body may be either integral with or separable from the remainder of the cylindrically shaped case and the cylindrical portion of the case is provided with an extension which is deformed, by the application of heat and pressure during the manufacturing process, to form the element which locks the head to the plastic body.
Claims6
A cartridge case comprising:
- a metal head, said head including a cylindrical forward portion, a base portion oriented generally transverse to the axis of said cylindrical portion and a rim portion interconnecting said base and cylindrical portions, said rim portion extending outwardly with respect to said cylindrical portion to define a circular groove facing said axis of said cylindrical portion;
- and
- charge receiving body means, said body means being comprised of thermoplastic material and being of cylindrical shape, said body means having an outer diameter commensurate with said head cylindrical portion inner diameter and being received in said head cylindrical portion, said body means having a thin walled tubular portion which extends forwardly from said head cylindrical portion coaxially therewith, said body means also having a base portion of increased wall thickness which terminates in abutting relationship with said head base portion, said body means base portion having an outwardly extending integral flange which is engaged in said head rim portion circular groove thereby locking said head to said body means.
Dependencies are inferred from the claim text.