Patent ID: 8231018

Claim:
A screw closure having a tamper-proof strip, wherein the screw closure ( 10 ) comprises: a head plate ( 1 ); an at least approximately cylindrical cap skirt ( 2 ) comprising a female screw thread ( 11 ); and the tamper-proof strip, the tamper-proof strip being connected to the lower edge of the cap skirt ( 2 ) by way of an easily tearable connection ( 8 ), the strip being in the form of a flexible strip ( 3 ) comprising a first portion ( 4 ) directed downwardly from the cap skirt ( 2 ) and a second portion ( 5 ) which is attached at the lower end of the first portion ( 4 ) and which is folded over inwardly and back in the direction of the head plate ( 1 ), for engaging behind a securing ring ( 21 ) on a container neck ( 20 ), wherein at least one extension ( 7 ) is provided in axial extension of the second portion ( 5 ), the extension ( 7 ) being attached to an outer edge of the upper surface ( 12 ) of the inwardly folded-over second portion ( 5 ) and leaving an inner edge of the upper surface ( 12 ) of said second portion ( 5 ) free, wherein the second portion ( 5 ) extending along the inner periphery of the screw closure has a plurality of apertures ( 9 ) provided at approximately equal angular spacing, wherein the extension ( 7 ) extends in the peripheral direction over at least one of said plurality of apertures ( 9 ) provided in the second portion ( 5 ), wherein the extension ( 7 ) bears with its radially inner surface against the outer periphery of the securing ring ( 21 ) of a container neck while the upper surface ( 12 ) of the second portion ( 5 ) is in opposite relationship to the underside ( 22 ) of the securing ring ( 21 ), wherein said tamper-proof strip further comprises a closed ring formed proximate the upper surface ( 12 ) of the second portion ( 5 ), and wherein said extension ( 7 ) is one of a plurality of extensions ( 7 ), and each of said plurality of apertures ( 9 ) extends to the upper surface ( 12 ) of the second portion ( 5 ) and is there bridged over by one of said plurality of extensions ( 7 ) to thereby form said closed ring.