Plastic closure

Abstract

The invention relates to a plastic closure ( 1 ) having a bottom part ( 2 ) and a top part ( 3 ) in order to make a tubular bag ( 4 ) user-friendly and provide it with a secure closure. The bottom part ( 2 ) has a flange ( 20 ) on which a nozzle ( 21 ) is integrally formed. The nozzle has a cylindrical part ( 22 ), in the region of which a form-fit means ( 25 ) is attached to one side and an external thread ( 26 ) located above is attached to the other side. A tapering, arched, conical part ( 23 ) follows over the cylindrical part. The top part ( 3 ) consists of a retaining ring ( 30 ), which is connected to a cap ( 40 ) via a tightening strap ( 31 ). The retaining ring ( 30 ) comprises form-fit means ( 33 ) which engage with the form-fit means ( 25 ) on the cylindrical part ( 22 ) of the nozzle. The retaining ring ( 30 ) is thus held on the nozzle ( 21 ) in a rotatable but axially fixed manner. The cap ( 40 ) has an internal thread ( 48 ) which clamps with the external thread ( 26 ) of the nozzle ( 21 ).

1 . A plastic closure ( 1 ) for application on a tubular bag ( 4 ) having a dispensing opening ( 5 ), the closure comprising a bottom part ( 2 ) having a nozzle ( 21 ) which is disposed over the dispensing opening and a top part ( 3 ) having a cap ( 40 ) for tight sealing of the nozzle ( 21 ), characterized in that the cap ( 40 ) can be directly mounted on said nozzle ( 21 ) so as to be movable in a screw-like fashion and is indirectly held pivotably on said nozzle ( 21 ) so as to be able to be opened and closed. 
     
     
         2 . The plastic closure ( 1 ) according to  claim 1 , characterized in that the nozzle ( 21 ) is a drink nozzle comprising a cylindrical part ( 22 ), to which a tapering, arched, conical part ( 23 ) attaches, wherein the cylindrical part ( 22 ) is provided with a flange ( 20 ) configured to connect to the tubular bag. 
     
     
         3 . The plastic closure ( 1 ) according to  claim 2 , characterized in that the cap ( 40 ) is connected via a tightening strap ( 31 ) to a retaining ring ( 30 ) which is held on the cylindrical part ( 22 ) of the nozzle ( 27 ) in a rotatable and axially fixed manner. 
     
     
         4 . The plastic closure ( 1 ) according to  claim 3 , characterized in that the retaining ring ( 30 ) is not as tall as a height of the cylindrical part ( 22 ) of the nozzle ( 21 ) in an axial direction. 
     
     
         5 . The plastic closure ( 1 ) according to  claim 2 , characterized in that an external thread ( 26 ) is integrally formed with an upper region of the cylindrical part ( 22 ) of the nozzle and the cap ( 40 ) has an internal thread which is matched thereto. 
     
     
         6 . The plastic closure ( 1 ) according to  claim 3 , characterized in that the retaining ring ( 30 ) is connected by means of a circumferential form-fit means ( 33 ) onto a corresponding mirror-inverted form-fit means ( 25 ) on the cylindrical part ( 22 ) of the nozzle ( 21 ) in an axially fixed manner, but rotatably to said nozzle. 
     
     
         7 . The plastic closure ( 1 ) according to  claim 3 , characterized in that the tightening strap ( 31 ) moves from an approximately stretched position into a completely stretched, tensioned position when the cap ( 40 ) is being screwed open. 
     
     
         8 . The plastic closure ( 1 ) according to  claim 7 , characterized in that after the cap ( 40 ) has been completely screwed open, a bottom edge ( 47 ) of said cap ( 40 ) ends up at least in a region in the proximity of the transition from the cylindrical part ( 22 ) into the tapering, arched, conical part ( 23 ) of the nozzle ( 21 ). 
     
     
         9 . The plastic closure ( 1 ) according to  claim 6 , characterized in that a tamperproof element ( 45 ) is integrally formed with the cap ( 40 ), the element engaging in the circumferential form-fit means of the nozzle in a tamperproof position. 
     
     
         10 . The plastic closure ( 1 ) according to  claim 9 , characterized in that the tamperproof element ( 45 ) is a plate, which is connected to the cap ( 40 ) via breaking point bridges ( 44 ). 
     
     
         11 . The plastic closure ( 1 ) according to  claim 9 , characterized in that the retaining ring ( 30 ) comprises a recess which extends in an assembled state from top to bottom across the form-fit means on the nozzle ( 21 ) and corresponds at least to the size of the plate ( 45 ). 
     
     
         12 . The plastic closure ( 1 ) according to  claim 9 , characterized in that a tear-off tab ( 46 ) is molded to the plate ( 45 ). 
     
     
         13 . The plastic closure ( 1 ) according to  claim 3 , characterized in that the retaining ring ( 30 ) is connected by means of a circumferential form-fit retaining bead onto a corresponding mirror-inverted form-fit means ( 25 ) on the cylindrical part ( 22 ) of the nozzle ( 21 ) in an axially fixed manner, but rotatably to said nozzle. 
     
     
         14 . The plastic closure ( 1 ) according to  claim 3 , characterized in that the retaining ring ( 30 ) is connected by means of a circumferential form-fit means retaining groove onto a corresponding mirror-inverted form-fit means ( 25 ) on the cylindrical part ( 22 ) of the nozzle ( 21 ) in an axially fixed manner, but rotatably to said nozzle.