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ALL PLASTIC SHOTSHELL CASE WITH TRANSVERSELY ORIENTED UNDULATIONS ON OUTER CYLINDRICAL SURFACE

  • US 3,808,974 A
  • Filed: 11/08/1971
  • Issued: 05/07/1974
  • Est. Priority Date: 11/08/1971
  • Status: Expired due to Term
First Claim
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1. An all plastic shotshell case comprising:

  • a substantially cylindrical sidewall of molded plastic open at one end;

    a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell; and

    a plurality of undulations on the outer surface of said sidewall projecting outwardly therefrom, said undulations being formed integrally with said sidewall and extending in longitudinally spaced circular patterns over more than one half of the length of said sidewall up to and along said open end thereof, and said undulations being in the form of circumferentially extending rings of varying width in a direction along the length of said cylindrical sidewall, with the narrower rings being disposed adjacent said open end of said sidewall and being deformable against a shotgun barrel under the pressure developed within said shotshell case upon firing.

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