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Device and method for controlling the tension of a substrate web

  • US 8,662,626 B2
  • Filed: 11/18/2010
  • Issued: 03/04/2014
  • Est. Priority Date: 11/30/2009
  • Status: Expired due to Fees
First Claim
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1. 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.

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