Tape closure for a can end
AssigneeMinnesota Mining and Manufacturing Company
InventorWilfred R. Brochman
Life of this patent
Estimating the term…
Abstract
A tape closure which is adhesively adhered about a pour opening on the exterior surface of a can end having a first coating over the metallic can end and a second coating over said first coating comprising a vinyl chloride/vinyl acetate copolymer having at least about 10 percent vinyl acetate which is adhered to the tape adhesive with a bond greater than the bond between the second coating and the first coating affording removal of the second coating upon breaking the coating and delaminating the same from the first coating upon removal of the tape.
Claims12
A container end assembly comprising:
- a container end formed of metallic material having an exterior surface and an interior surface and being formed with a pour opening;
- a first coating over said exterior surface of said end;
- a second coating on said exterior surface over said first coating and bonded thereto, said second coating comprising a vinyl chloride/vinyl acetate copolymer;
- a tape bonded by an adhesive to an area of the exterior surface of said second coating circumjacent and covering said pour opening, said adhesive forming a bond between said tape and said second coating which is greater than the bond between said second coating and said first coating whereby upon peeling of the tape from said container end said second coating delaminates in the area of the adhesive bond to said second coating, peeling said second coating from said first coating upon removal of the tape from the container end.
A tamper-resistant tape closure for a container having
- a container end formed of metallic material, said end having an exterior surface and an interior surface and being formed with a pour opening;
- a first coating over said exterior surface of said end;
- a second coating on said exterior surface over said first coating and bonded thereto, said second coating comprising a vinyl chloride/vinyl acetate copolymer;
- a tape comprising a polymeric backing and thermoplastic adhesive, said tape being bonded to an area of the exterior surface of said second coating circumjacent and covering said pour opening, said adhesive forming a bond between said tape and said second coating which is greater than the bond between said second coating and said first coating whereby upon peeling of the tape from said end said second coating delaminates in the area of the adhesive bond to said second coating, peeling said second coating from said first coating and exposing the first coating about said opening while leaving a coating on the adhesive to restrict subsequent adhesive bonding again to said container end in the area said tape is peeled from the container end.
Dependencies are inferred from the claim text.