Patent ID: 8851310

Claim:
A closure for a container comprising: a pouring spout having a neck to define a pour opening and a cover portion closing one end of said neck; a cap which can be rotated about a longitudinal axis to be fitted to, and removed from, the pouring spout; a cam element for transforming a rotational force applied to said cap about said axis into a stroke of said cap having a rotational component about said axis and a translational component along said axis to couple/detach said cap with/from said pouring spout; a weakening line provided on said end of said neck; first opening promoting means provided on an annular outer periphery of said cover portion; second opening promoting means provided on an annular inner periphery of said cap and arranged for engaging said first opening promoting means upon removal of said cap from the pouring spout to produce a lifting thrust on said cover portion along said axis so as to obtain at least a partial separation of the cover portion from said neck along the weakening line; and wherein said first and second opening promoting means comprise at least one further cam element arranged along an angular portion of the annular periphery of one of said cap and said cover portion and configured to enhance the lifting thrust produced by the cap on the cover portion as a result of the action of said cam element during removal of said cap from said pouring spout.