| 摘要 |
The invention relates to a tubular bag machine (10) having a tube forming device (15), comprising a forming shoulder (16) and a forming pipe (17) for forming a packaging material tube (5) made of at least one packaging material web (11), a vacuum-assisted take-off device (25) in the form of endless recirculating belts (26, 27) in the region of the forming pipe (17), a storage roll (12) for storing the packaging material web (11), wherein a partial length of the packaging material web (11) is intermediately stored in a buffer device (38) between the storage roll (12) and the forming pipe (17), and wherein the buffer device (38) comprises at least one dancer roll (43, 44) having a force applied thereto by means of a tensioning device (48) and applying a tension to the packaging material web (11) in the region of the buffer device (38), which tension acts at least partially unto the region of the take-off device (25). According to the invention, the force application of the at least one dancer roll (43, 44) can be modified by the tensioning device (48) as a function of the operating state of the take-off device (25). |
