Patent ID: 7886922
Filing Date: 2011-02-15
Classification: B65D

Abstract:
1. A multipart plastic closing device attachable over a receptacle, comprising a bung-shaped bottom part ( 3 ) with a cylindrical pouring spout ( 9 ) which is connected or connectable to the receptacle, and a closing cap ( 2 ) having a top cover and a cylindrical skirt extending downward from the top cover, the closing cap sealingly placeable on the spout ( 9 ) of the bottom part ( 3 ), as well as a cylindrical cutting ring ( 1 ) which is open on both sides in an axial direction and is helically movably provided in the spout ( 9 ) of the bottom part ( 3 ), within the closing cap ( 2 ) there being at least one axial driving cam extending downward from the top cover, separately from the cylindrical skirt, the at least one axial driving cam acting on the cutting ring ( 1 ) during an unscrewing movement of the closing cap ( 2 ), characterised in that the cutting ring ( 1 ) has a cylindrical outer wall ( 30 ) that is not continuously circular, and has at least one axial recess ( 6 ) disposed in the cylindrical outer wall ( 30 ), thereby forming a non-continuously circular cutting ring; the axial recess cooperates as a driver with the at least one axial driving cam ( 16 ) when said at least one axial driving cam engages within the axial recess ( 6 ), or as a stop when from inside the cutting ring ( 1 ) and outside the recess ( 6 ) the at least one axial driving cam engages the cutting ring, as a result of which the cutting ring ( 1 ), during an unscrewing movement of the closing cap ( 2 ) due to positively fitting means ( 5 , 13 ) moulded to an inner wall of the cylindrical pouring spout ( 9 ) of the bottom part ( 3 ) and to an outside of the cutting ring ( 1 ), is displaceable into a helical downward-leading movement during an initial unscrewing movement of the closing cap ( 2 ), and that the underside of the cutting ring ( 1 ) has a sharp cutting edge ( 4 ) extending from a bottom edge ( 29 ) of the cutting ring ( 1 ) and having an obtuse angle ( 21 ) relative to the bottom edge ( 29 ), and that the at least one axial recess ( 6 ) on the cutting ring ( 1 ) acts as a ventilation duct ( 26 ) when the contents are poured out.