Tamper-resistant packaging tape
AssigneeMinnesota Mining and Manufacturing Company
InventorHak-Rhim Han
Life of this patent
Estimating the term…
Abstract
A pressure sensitive adhesive tape capable of providing tamper detection to capped containers and comprising a backing having an outer layer with sufficiently high tensile strength to maintain its integrity when removed from the tape and an inner layer adjacent the adhesive which is thin and deformable, wherein the outer layer can be removed from the inner layer without disrupting the adhesive bond of the inner layer to the pressure sensitive adhesive.
Claims33
A pressure sensitive adhesive tape comprising a backing with a pressure sensitive adhesive thereon, said backing comprising an outer layer having a sufficiently high tensile strength to maintain its integrity when removed from said tape and a plastic inner layer, adjacent said adhesive, which is thin and stretchable or deformable, the adhesion between said outer and inner layers being sufficiently low when compared to the adhesion between said adhesive and said inner layer, whereby said outer layer may be removed from said inner layer without disrupting the adhesive bond between said inner layer and said adhesive.
A sealed container comprising an open-mouthed container having a cap sealed thereon, and adhesively attached to said cap and said container at the location of said cap a pressure sensitive tape, said tape comprising a backing with a pressure sensitive adhesive thereon, said backing comprising an outer layer having a sufficiently high tensile strength to maintain its integrity when removed from said tape and a plastic inner layer, adjacent said adhesive, which is thin and stretchable or deformable, the adhesion between said outer and inner layers being sufficiently low when compared to the adhesion between said adhesive and said inner layer, whereby said outer layer may be removed from said inner layer without disrupting the adhesive bond between said inner layer and said adhesive.
A method for providing tamper detection to a sealed container wherein the seal is provided by a cap over the open mouth of said container, said method comprising adhesively attaching to said cap and said container a pressure sensitive tape, said tape comprising a backing with a pressure sensitive adhesive thereon, said backing comprising a heat shrinkable outer layer having a sufficiently high tensile strength to maintain its integrity when removed from said tape and a plastic inner layer, adjacent said adhesive, which is thin and stretchable or deformable, the adhesion between said outer and inner layers being sufficiently low when compared to the adhesion between said adhesive and said inner layer, whereby said outer layer may be removed from said inner layer without disrupting the adhesive bond between said inner layer and said adhesive;
- heating of said tape to cause shrinkage thereof around said cap and container.
A unitary package comprising individual boxes having been unitized by the attachment thereto of a pressure sensitive tape, said tape comprising a backing with a pressure sensitive adhesive thereon, said backing comprising an outer layer having a sufficiently high tensile strength to maintain its integrity when removed from said tape and a polymeric inner layer, adjacent said adhesive, which is thin and stretchable or deformable, the adhesion between said outer and inner layers being sufficiently low when compared to the adhesion between said adhesive and said inner layer, whereby said outer layer may be removed from said inner layer without disrupting the adhesive bond between said inner layer and said adhesive.
Dependencies are inferred from the claim text.