Closure for containers
AssigneeAlbert Obrist AG
InventorDietmar Aichinger
Life of this patent
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Abstract
A closure comprising a cap and downwardly depending band or skirt severable therefrom along a substantially annular predetermined tear line is disclosed. The band provides a tamper-proof or guarantee type closure. At least the band is made of heat deformable thermoplastic material whereby after positioning of the cap on the container the band is heat deformed to tightly encircle the container.
Claims17
A closure for containers consisting of a cap having a downwardly depending band at least partially severable therefrom along a substantially annular predetermined tear line, at least the depending band being of heat deformable thermoplastic material, the depending band increasing in thickness downwardly from the predetermined tear line, the depending band after positioning of the cap on a container being heat deformable into shape-locking engagement with the container, said band as it increases in thickness being devoid of abrupt changes in the contour of its walls such as would preclude axial removal of the cap and band from a nonexpanding mold engaging the band during formation in a molding process.
In combination, a container and a closure cap having a downwardly depending band at least partially severable therefrom along a substantially annular predetermined tear line, at least the depending band being of heat deformable thermoplastic material, the depending band after positioning of the cap on the container being heat deformable into shape-locking engagement with the container, the inner surfaces of the cap and band being adapted to the outer surface of the container whereby before heat deformation the band abuts firmly on the container in the region of the predetermined tear line, and said region of the band is protected against excessive heating by heat conduction into the abutting container.
Dependencies are inferred from the claim text.