Patent ID: 8720744

Claim:
A closeable opening device ( 1 ) for a sealed packaging, which contains a flowable medium, wherein the device comprises a spout fitting ( 2 ) having a cylindrical pipe section ( 20 ) and flange ( 21 ), said pipe section being furnished with an internal thread ( 23 ) and an external thread ( 22 ), as well as a cylindrical cutting element ( 3 ), a lower edge of which being equipped with one or a plurality of teeth ( 35 ) and an internal jacket surface of which being furnished with driving dogs ( 37 ) that protrude in a radial direction and interact with driving dogs ( 45 ) in a screw cap ( 4 ) comprising a jacket wall ( 41 ) and cover surface ( 40 ), wherein the spout fitting ( 2 ) and the cylindrical cutting element ( 3 ) are produced as a one-piece semi-finished good ( 5 ) connected to one another via predetermined breaking point bridges ( 34 ), characterized in that the cylindrical cutting element ( 3 ) has at an upper edge thereof ( 32 ) a plurality of recesses ( 36 ) uniformly distributed around a circumference and in that ring wall segments ( 46 ) diametrically opposite the recesses ( 36 ) are integrally formed on the cover surface ( 40 ) in the screw cap ( 4 ), wherein said ring wall segments, when rotated, are able to slide onto the upper edge ( 33 ) of the cutting element ( 3 ) until said segments engage in the recesses ( 36 ) in the upper edge ( 33 ).