Patent ID: 6851576
Filing Date: 2005-02-08
Classification: B65D

Abstract:
1. A closure device of plastic which is attachable via a piercable location of a closed receptacle (B) and which has a bung-like lower part ( 2 ) with a cylindrical pour-out spout ( 20 ) which is connectable to the receptacle, and of a screw cap ( 4 ) which is screwable onto the lower part ( 2 ), as well as of a cylindrical piercing element ( 3 ) which in an axial direction is open on both sides and which is displaceably mounted in the lower part, and during a screwing-off movement of the screw cap for a first time the piercing element ( 3 ) is moved helically downwards, the closure device comprising: the piercing element ( 3 ) having at least two cutting elements ( 33 ) arranged running after one another by an offset angle (α) of less than 180° and more than 100° so that after a rotation of the piercing element ( 3 ) by the offset angle (α) a continuous cutting line of 2 α arises, and a displacing element ( 34 , 35 , 38 ) acting in a non-separated region which pushes a partly cut-out lobe of the receptacle out of a region of the pour-out spout ( 20 ).