| 摘要 |
<p>A device (18, 60) and a method for controlling a twist of a tube (20, 62) of packaging material in relation to an apparatus (28) for transverse sealing of the tube, are provided. The device is characterized by comprising a number of rollers (30,64) forming an aperture (32) through which the packaging material is arranged to pass. A rolling surface (34, 66) of each of the rollers is arranged to be in contact with an outer surface of the tube. Further, a direction of a rotation axis of at least one of the rollers is adjustable so as to control the twist of the tube.</p> |
