Plastic closure device for a tubular bag

Abstract

The invention relates to a plastic closure device ( 1 ) for a tubular bag made of plastic or a multi-layer plastic film, comprising at least one bottom part ( 5 ) that has a spout ( 7 ), a spout opening ( 8 ), and a flange ( 4 ). The flange ( 4 ) has an energy-introduction arrangement ( 10 ) on the flange underside surface ( 9 ) of the flange. The energy-introduction arrangement can be connected to the plastic material or the plastic film of the tubular bag by means of ultrasonic welding. The energy-introduction arrangement ( 10 ) has at least one energy-introduction rib ( 12 ) arranged concentrically to the spout opening ( 8 ) in the peripheral region ( 11 ) of the flange ( 4 ). A concentrating rib ( 13 ) is provided on the flange underside surface ( 9 ). The concentrating rib extends within the energy-introduction arrangement ( 10 ) and protrudes from the flange underside surface ( 9 ) higher than the energy-introduction rib ( 12 ) and also extends directly adjacent to the spout opening ( 8 ).

1 . A plastic closure device ( 1 ) for a tubular bag from plastic or from a multilayered plastic film, wherein
 the plastic closure device ( 1 ) comprises at least one lower part ( 5 ) with a spout ( 7 ), a spout opening ( 8 ) and a flange ( 4 ) having a flange lower side and a peripheral region, and wherein   an energy-introducing arrangement ( 10 ), which is connectable by means of ultrasonic welding to the plastic material or to the plastic film of the tubular bag, is arranged on the flange ( 4 ) on a face of the flange lower side ( 9 ), and wherein   the energy-introducing arrangement ( 10 ) has at least one energy-conducting rib ( 12 ) which is arranged concentrically with the spout opening ( 8 ) in the peripheral region ( 11 ) of the flange ( 4 ),   characterized in that   a concentration rib ( 13 ), which runs centrically offset to the energy-introducing arrangement ( 10 ) and, with respect to the energy-conducting rib ( 12 ), protrudes higher from the face of the flange lower side ( 9 ) and is arranged immediately adjacent to the spout opening ( 8 ), is provided on the face of the flange lower side ( 9 ).   
     
     
         2 . The plastic closure device ( 1 ) as claimed in  claim 1 , characterized in that the concentration rib ( 13 ) is an elevation which has a rounded cross section. 
     
     
         3 . The plastic closure device ( 1 ) as claimed in  claim 1 , characterized in that the concentration rib ( 13 ) extends in a circular manner along an entire inner circumference of the flange ( 4 ). 
     
     
         4 . The plastic closure device ( 1 ) as claimed in  claim 1 , characterized in that the concentration rib ( 13 ) extends along part of an inner circumference of the flange ( 4 ). 
     
     
         5 . The plastic closure device ( 1 ) as claimed in  claim 4 , characterized in that the part of the inner circumference along which the concentration rib ( 13 ) extends is at maximum 330°. 
     
     
         6 . The plastic closure device ( 1 ) as claimed in  claim 1 , characterized in that the plastic closure device ( 1 ) has an opening device with a cutting device ( 6 ) with at least one cutting tooth ( 19 ), wherein the at least one cutting tooth ( 19 ), during actuation of the plastic closure device ( 1 ), is movable in an encircling manner in a vicinity of the concentration rib ( 13 ) in order to cut open the plastic material or the multilayered plastic film. 
     
     
         7 . The plastic closure device ( 1 ) as claimed in  claim 6 , characterized in that the cutting device ( 6 ) is arranged and guided such that it cuts open only a pitch circle region of the tubular bag, said pitch circle region running at least almost immediately alongside the concentration rib ( 13 ). 
     
     
         8 . The plastic closure device ( 1 ) as claimed in  claim 1 , characterized in that further conducting ribs ( 21 ), which run radially to the at least one energy-conducting rib ( 12 ) substantially up to a periphery of the flange ( 4 ), are also provided. 
     
     
         9 . The plastic closure device ( 1 ) as claimed in  claim 4 , characterized in that the part of the inner circumference along which the concentration rib ( 13 ) extends 240° to 300°. 
     
     
         10 . The plastic closure device ( 1 ) as claimed in  claim 2 , characterized in that the concentration rib ( 13 ) extends in a circular manner along an entire inner circumference of the flange ( 4 ). 
     
     
         11 . The plastic closure device ( 1 ) as claimed in  claim 2 , characterized in that the concentration rib ( 13 ) extends along part of an inner circumference of the flange ( 4 ). 
     
     
         12 . The plastic closure device ( 1 ) as claimed in  claim 11 , characterized in that the part of the inner circumference along which the concentration rib ( 13 ) extends is at maximum 330°. 
     
     
         13 . The plastic closure device ( 1 ) as claimed in  claim 12 , characterized in that the plastic closure device ( 1 ) has an opening device with a cutting device ( 6 ) with at least one cutting tooth ( 19 ), wherein the at least one cutting tooth ( 19 ), during actuation of the plastic closure device ( 1 ), is movable in an encircling manner in a vicinity of the concentration rib ( 13 ) in order to cut open the plastic material or the multilayered plastic film. 
     
     
         14 . The plastic closure device ( 1 ) as claimed in  claim 13 , characterized in that the cutting device ( 6 ) is arranged and guided such that it cuts open only a pitch circle region of the tubular bag, said pitch circle region running at least almost immediately alongside the concentration rib ( 13 ). 
     
     
         15 . The plastic closure device ( 1 ) as claimed in  claim 14 , characterized in that further conducting ribs ( 21 ), which run radially to the at least one energy-conducting rib ( 12 ) substantially up to a periphery of the flange ( 4 ), are also provided. 
     
     
         16 . The plastic closure device ( 1 ) as claimed in  claim 11 , characterized in that the part of the inner circumference along which the concentration rib ( 13 ) extends 240° to 300°.