Container and innerseal capable of indicating heat tampering
AssigneeMinnesota Mining and Manufacturing Company
InventorJeffrey O. Emslander
Life of this patent
Estimating the term…
Abstract
Innerseal for bottles or other containers comprising a facing layer, an insulating layer adhered to one major surface of said facing layer, and a thermally sensitive layer adhered to said insulating layer. In a second embodiment, the innerseal comprises a facing layer and a thermally sensitive layer adhered to said facing layer. Upon application of a sufficient amount of heat to the thermally sensitive layer, said layer will change its appearance in such a way as to provide an indication of tampering by means of heat.
Claims18
An innerseal, capable of detecting tampering by means of heat, comprising:
- (a) a facing layer,
- (b) an insulating layer adhered to one major surface of said facing layer, and
- (c) a thermally sensitive layer adhered to the surface of said insulating layer that is not adhered to said facing layer, said thermally sensitive layer capable of changing its appearance upon application of a sufficient amount of heat thereto.
An innerseal, capable of detecting tampering by means of heat, comprising:
- (a) a facing layer, and
- (b) a thermally sensitive layer adhered to said facing layer, said thermally sensitive layer capable of changing its appearance upon application of a sufficient amount of heat thereto
- wherein said thermally sensitive layer is formed of randomly dispersed, equiaxed, irregularly shaped particles of thermoplastic polymer, said particles being spaced from one another to provide a network of micropores therebetween, said particles being connected to each other by fibrils which radiate from each particle to the adjacent particles.
A container having a tamper-indicating innerseal comprising
- (a) a facing layer,
- (b) an insulating layer adhered to one major surface of said facing layer, and
- (c) a thermally sensitive layer adhered to the surface of said insulating layer that is not adhered to said facing layer, said thermally sensitive layer capable of changing its appearance upon application of a sufficient amount of heat thereto.
A container having a tamper-indicating innerseal comprising:
- (a) a facing layer, and
- (b) a thermally sensitive layer adhered to said facing layer, said thermally sensitive layer capable of changing its appearance upon application of a sufficient amount of heat thereto
- wherein said thermally sensitive layer is formed of randomly dispersed, equiaxed, irregularly shaped particles of thermoplastic polymer, said particles being spaced from one another to provide a network of micropores therebetween, said particles being connected to each other by fibrils which radiate from each particle to the adjacent particles.
Dependencies are inferred from the claim text.