Patent ID: 8479943

Claim:
A container closure ( 2 ) for a container ( 3 ) having a push-pull closure ( 6 ) capable of a push and pull motion, comprising a sheet-material piercer ( 1 ), which is configured to be substantially rotationally symmetrical about an axis of rotational symmetry (R) and is inserted in the container closure ( 2 ) so that the sheet-material piercer ( 1 ) is axially displaceable in the direction of the axis of rotational symmetry (R) independently from the push-pull closure, wherein the sheet-material piercer ( 1 ) is in one piece and has at least one sealing formation ( 16 , 17 , 18 ) which is likewise configured to be rotationally symmetrical about the axis of rotational symmetry (R) and is arranged between an actuating end ( 13 ) and a piercing end ( 14 ) of the sheet-material piercer ( 1 ) and is configured for sealing and latchable contact with the container closure ( 2 ), wherein the container closure ( 2 ) comprises a cover part ( 5 ) which can be attached around a container opening, the push-pull closure ( 6 ) being attached displaceably on the cover part ( 5 ) in such a manner that a drinking opening ( 20 ) can be released or closed by displacing the push-pull closure ( 6 ) on the cover part ( 5 ), wherein a tearable or piercable closure film ( 11 ) is attached to the cover part ( 5 ) so that the closure film ( 11 ) is firmly connected to the cover part ( 5 ) and an additional chamber ( 12 ) tightly separated from container content is formed in an inner chamber of the cover part ( 5 ) facing the push-pull closure ( 6 ), the additional chamber ( 12 ) of the container closure ( 2 ) being configured tightly for accommodating a substance of liquid or powdery consistency and the closure film ( 11 ) in an intact state preventing an outflow of the container content through the drinking opening ( 20 ), wherein the sheet-material piercer ( 1 ) is attached displaceably in the cover part ( 5 ) so that the sheet-material piercer ( 1 ) is moveable from a first position to a second position by an actuation of the sheet-material piercer ( 1 ), wherein the closure film ( 11 ) is configured to be torn apart or pierced when the sheet-material piercer ( 1 ) is moved from the first position to the second position by the actuation of the sheet-material piercer ( 1 ), thus enabling a substance to enter into the container ( 3 ) from the additional chamber ( 12 ), and wherein the sheet-material piercer ( 1 ) and the push-pull closure ( 6 ) are displaceable independently from one another on the cover part ( 5 ) and the sheet-material piercer ( 1 ) can be positioned in sealing and latching manner in the cover part ( 5 ) via the at least one sealing formation ( 16 , 17 , 18 ) so that the at least one sealing formation ( 16 , 17 , 18 ) is in sealing contact with the cover part ( 5 ) when the sheet-material piercer ( 1 ) is in the first position or the second position or in another position between the first position and the second position.