Patent ID: 8662626

Claim:
Device for controlling the tension of a substrate web that is conveyed along a transport path, the device comprising: a first driving unit with a first driving roller around which a substrate web is partially guided and tensioned; a second driving unit with a second driving roller around which the substrate web is partially guided and tensioned, with the first and the second driving units featuring different rotational moments of inertia; a measuring unit for delivery of a measured value of the tension of the substrate web; a control unit in connection with the measuring unit and the first and second driving units, the control unit comprising a first and a second filtering unit displaying different filtering characteristics for filtering the measured value, the control unit comprising a first control device for controlling the first driving unit based on the measured value filtered by the first filtering device, as well as a second control device for controlling the second driving unit based on the measured value filtered by the second filtering device.