Patent ID: 8459478

Claim:
A self-opening closure for a combipack or a container spout sealed with a foil material, said self-opening closure comprising: a pouring spout ( 10 ) adapted to be assembled leak-proof on a combipack ( 15 ) or a container spout sealed with a foil material; a twist cap ( 9 ) engaged with the pouring spout ( 10 ); and a self-opening sleeve ( 1 ) arranged within the pouring spout ( 10 ) and adapted to be moved downward by the twist cap ( 9 ) inside the pouring spout; said self-opening sleeve ( 1 ) having a portion bent toward an interior thereof, forming an indentation ( 4 ) on an outer side of the self-opening sleeve ( 1 ); said indentation ( 4 ) extending from an upper edge ( 5 ) of the self-opening sleeve ( 1 ) downward and tapering toward a bottom edge ( 6 ) of the self-opening sleeve, and said indentation ( 4 ) forming an air channel for the combipack or a container.