Packaging machine with induction heating and flux guide means

Abstract

The present invention relates to an apparatus for packaging items into a film, whereas the film is formed and or sealed by forming- and/or sealing-means each comprising a heating body which is heated by induction heating means and which is moving and/or difficult to access.

1 . Apparatus for packaging items into a film, whereas the film is formed and/or sealed by forming and/or sealing means each comprising a heating body which is heated by induction heating means and which is moving and/or difficult to access, characterized in that the induction heating means comprises flux guide means, wherein the flux guide means comprises an inlet and an outlet and that the heating body passes through the flux guide means from the inlet to the outlet. 
     
     
         2 . Apparatus according to  claim 1 , characterized in that the flux guide means is U-shaped or C-shaped. 
     
     
         3 . Apparatus according to  claim 1 , characterized in that the flux guide means comprise a section which is tangentially oriented to the moving path of the heating body. 
     
     
         4 . Apparatus according to  claim 1 , characterized in that the electrical conductivity of the flux guide means is less than 10 S/m. 
     
     
         5 . Apparatus according to  claim 1 , characterized in that the relative permeability flux guide means is greater than 300 and less than or equal to 25,000. 
     
     
         6 . Apparatus according to  claim 1 , characterized in that the electrical conductivity of the heating body is less than 1.0e 6  S/m-1.12e 7  S/m. 
     
     
         7 . Apparatus according to  claim 1 , characterized in that the relative permeability of the heating body is greater than 2000 and less than or equal to 25,000. 
     
     
         8 . Apparatus according to  claim 1 , characterized in that there is an air gap between the flux guide means and the heating body and that the air gap is less than 5 mm. 
     
     
         9 . Apparatus according to  claim 1  comprising a multitude of forming and/or sealing means and that each forming and/or sealing means comprise wireless temperature measurement means, respectively, which are directly or indirectly connected to the forming and/or sealing means. 
     
     
         10 . Apparatus according to  claim 1 , characterized in that each forming and/or sealing means comprise a transmitter and/or a receiver that transmits or receives energy and/or a signal wirelessly. 
     
     
         11 . Apparatus according to  claim 1 , comprising infrared temperature measurement means and that the measurement is carried out in a dark environment. 
     
     
         12 . Apparatus according to  claim 1 , characterized in that the forming and/or sealing means are partially insulated. 
     
     
         13 . Apparatus according to  claim 1 , characterized in that the electrical conductivity of the flux guide means is less than 5 S/m. 
     
     
         14 . Apparatus according to  claim 1 , characterized in that the electrical conductivity of the flux guide means is less than 1 S/m. 
     
     
         15 . Apparatus according to  claim 1 , characterized in that the relative permeability flux guide means is greater than 500 and less than or equal to 20,000. 
     
     
         16 . Apparatus according to  claim 1 , characterized in that the relative permeability of the heating body is greater than 2500 and less than or equal to 24,000. 
     
     
         17 . Apparatus according to  claim 8 , characterized in that the air gap is less than 3 mm. 
     
     
         18 . Apparatus according to  claim 8 , characterized in that the air gap is less than 1 mm.