Winding device comprising electrostatic charging means and method for fixing a multi-layered film

Abstract

The present invention relates to a device for winding up web-shaped material ( 35, 40, 41 ). This web-shaped material ( 35, 40, 41 ) is particularly film that is wound up on winding cores ( 7 ). The device for winding up web-shaped material ( 35, 40, 41 ) is equipped with at least one device for electrostatically charging ( 38, 42 ) the web-shaped material ( 35, 40, 41 ). Said device for electrostatically charging ( 38, 42 ) the web-shaped material ( 35, 40, 41 ) is arranged in such a manner with respect to the web-shaped material ( 35, 40, 41 ) and the winding core ( 7 ) that it exposes the web-shaped material ( 35, 40, 41 ) to an electrical field before it reaches the winding core ( 7 ).

1 . Device for winding up of web-shaped material ( 35 ,  40 ,  41 )—particularly film, on winding sleeves ( 7 ), that comprises of at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is arranged in such a manner with respect to the web-shaped material and the winding sleeve ( 7 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field before it reaches the position of the winding core ( 7 ) in the transport direction (z) of the web-shaped material ( 35 ,  40 ,  41 ).  
   
   
       2 . Device pursuant to  claim 1  characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is provided, which is arranged in such a manner with respect to the web-shaped material ( 35 ,  40 ,  41 ) and the winding core ( 7 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field in the transport direction (z) of the web-shaped material  30  centimeters before it reaches the winding core ( 7 ).  
   
   
       3 . Device pursuant to the preceding claim characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is provided, which is arranged in such a manner with respect to the web-shaped material ( 35 ,  40 ,  41 ) and the winding core ( 7 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field in the transport direction (z) of the web-shaped material 50 centimeters before it reaches the winding core.  
   
   
       4 . Device pursuant to  claim 1  characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is provided, which is arranged in such a manner with respect to the web-shaped material ( 35 ,  40 ,  41 ) and the winding core ( 7 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field before it reaches the last roller ( 18 ) of the winding device guiding the film before reaching the winding core ( 7 ).  
   
   
       5 . Device pursuant to the preceding claim characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is provided, which is arranged in such a manner with respect to the web-shaped material ( 35 ,  40 ,  41 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field when it runs on the last deflecting roller ( 37 ), that is upstream to the last roller ( 18 ) of the winding device and that guides the film before reaching the winding core ( 7 ).  
   
   
       6 . Device pursuant to  claim 4  characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is provided, which is arranged in such a manner with respect to the web-shaped material ( 35 ,  40 ,  41 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field before it runs on the last deflecting roller ( 37 ).  
   
   
       7 . Device pursuant to  claim 6  characterized in that at least one device for electrostatically charging ( 38 ,  42 ) the web-shaped material ( 35 ,  40 ,  41 ) is provided, which is arranged in such a manner with respect to the web-shaped material ( 35 ,  40 ,  41 ) that it exposes the web-shaped material ( 35 ,  40 ,  41 ) to an electrical field when it runs on a deflecting roller that is upstream to the last deflecting roller ( 37 ).  
   
   
       8 . Process for winding multi-layered, web-shaped material ( 35 ,  40 ,  41 ), preferably of film, in which the web-shaped material is exposed to the influence of an electrical field and thus is held down on components of the film roll characterized in that multi-layered web-shaped material ( 41 ) is wound up and that at least one layer of the web-shaped material ( 35 ,  40 ,  41 ) is laid down on at least one other layer of web-shaped material ( 40 ) during transport through the device for winding up web-shaped material.  
   
   
       9 . Process pursuant to the preceding claim characterized in that at least one web of material ( 41 ) is laid down on at least one other web of material ( 40 ).  
   
   
       10 . Process pursuant to  claim 8  characterized in that one wall of a tube of material is laid down on the other wall.  
   
   
       11 . Process pursuant to  claim 8  characterized in that the multi-layered web-shaped material ( 35 ,  40 ,  41 ) is exposed to an electrical field before it reaches the cutting point ( 12 ,  13 ).  
   
   
       12 . Process pursuant to  claim 9  characterized in that the multi-layered web-shaped material ( 35 ,  40 ,  41 ) is exposed to an electrical field before it reaches the cutting point ( 12 ,  13 ).  
   
   
       13 . Process pursuant to  claim 10  characterized in that the multi-layered web-shaped material ( 35 ,  40 ,  41 ) is exposed to an electrical field before it reaches the cutting point ( 12 ,  13 ).