Projectile rotating band

• US 3,910,194 A
• Filed: 04/25/1973
• Issued: 10/07/1975
• Est. Priority Date: 02/01/1971
• Status: Expired due to Term

• Current Assignee: Burton E. Tew Jr, Henry C. Dehm
• Original Assignee: Burton E. Tew Jr, Henry C. Dehm
• Inventors: Dehm, Henry C., Tew, Burton E. Jr.
• Primary Examiner(s): Stahl, Robert F.
• Application Number:
  US05/354,414
• Time in Patent Office: 895 Days
• Field of Search: 102/93,94,56
• US Class Current: 102/527
• CPC Class Codes: F42B 14/02 Driving bands; Rotating bands F42B14/04 takes precedence

Abstract

A plastic rotating band for a projectile. More particularly, this invention relates to a projectile having a plastic rotating band chemically bonded to the projectile.

Claims

1. A METAL PROJECTILE HAVING A HIGH DENSITY POLYTHYLENE ROTATING BAND SECURED TO THE SURFACE OF THE METAL PROJECTILE THE INTERSECTION OF THE SURFACE OF THE METAL PROJECTILE AND THE POLYETHYLENE ROTATING BAND DEFINING AN INTERFACE, SAID POLYETHYLENE ROTATING BAND BEING SECURED TO THE METAL PROJECTILE SOLELY BY A CHEMICAL BOND FORMED BETWEEN THE METAL PROJECTILE AND A PRIMER AND BETWEEN THE PRIMER AND POLYETHYLENE ROTATING BAND AT THE METAL PROJECTILE-ROTATING BAND INTERFACE, SAID PRIMER BEING PREPARED FROM A SOLUTION COMPRISING ETHYLENE-ACRYLIC ACID COPOLYMER, SAID CHEMICAL BOND HAVING A STRENGTH SUCH THAT THE CHEMICALLY BONDED POLYETHYLENE ROTATING BAND WHEN TESTED TO FAILURE IN TENSION OR IN SHEAR FAILS IN THE POLYETHYLENE ROTATING BAND RATHER THAN AT THE METAL PROJECTILE-ROTATING BAND INTERFACE.

2. A metal projectile having a polypropylene rotating band secured to the surface of the metal projectile, the intersection of the surface of the metal projectile and the polypropylene rotating band defining an interface, said polypropylene rotating band being secured to the metal projectile solely by a chemical bond formed between the metal projectile and a primer and between the primer and polypropylene at the metal projectile-rotating band interface, said primer being prepared from a solution of a maleic anhydride modified polymer of propylene prepared by chemically combining solid propylene polymers with from about 0.05% to about 5% by weight of maleic anhydride, said chemical bond having a strength such that the chemically bonded polypropylene rotating band when tested to failure in tension or in shear fails in the prolypropylene rotating band rather than at the metal projectile-rotating band interface.