December 2009 PFFC

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Twist & Shout

Web Lines A wrinkle is the web’s equivalent of a shout—stop it, you’re hurting me! To avoid your web shouting at you, think about how to apply uniform tension across it. Most converting equipment is designed with uniform tensioning in mind by ensuring all rollers are cylindrical and parallel to a tight tolerance. The two most common exceptions to our uniform tension plan are twists and bends. If a web twists or bends too much, it will “feel” excessively high shear, compressive or tensile stresses, and it will shout at you to stop it in the voice of ...

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