Back to results
US 4,564,121 AGranted
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 protective polymeric layer over the metallic can end which is adhered to the tape adhesive with a bond greater than the bond between the layer and the supporting surface therefor affording removal of the layer upon breaking the coating and delaminating the same from the support surface upon removal of the tape.
Claims7
A container end assembly comprising:
- a container end formed of tin-free steel having an exterior surface and an interior surface and being formed with a pour opening;
- a polymeric layer comprised of a vinyl chloride/vinyl acetate copolymer bonded to said exterior surface of said end;
- and
- a tape strip comprising a backing coated on one surface with a thermoplastic adhesive and bonded by said adhesive to an area of the exterior surface of said layer circumjacent and covering said pour opening, said adhesive forming a bond between said tape strip and said layer having greater strength than the bond between said layer and the exterior surface of said tin-free steel end supporting said layer, causing said layer to break and peel from said end upon removal of the tape strip from the container end.
1 more element
Dependencies are inferred from the claim text.