People have observed that once slit lanes cross each other, even momentarily, and particularly when they double up on a wound roll, that the trouble doesn’t want to clear itself. This can happen most generally when a trim crosses over into the winding roll. On an axial winder, such as a two drum, this can happen when one cut moves into its neighbor. So, why is this behavior sticky once started? Simple, the web pulls to the high diameter (and/or high nip) when in traction. A doubled up layer makes for a higher diameter, which makes for a bigger pull and so on in a self-exciting loop. That really sucks (the web over).
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Dr. Roisum is a well-known authority in the area of web handling and converting. He has authored seven books, including Winding, Rollers and Web-Handling and has coauthored or edited several others. He was a technical editor for Converting Magazine with a monthly column entitled "Web Works." An accomplished professional speaker and instructor, Roisum has been praised for his skill at translating highly technical information into a common sense practical reference. Dave has been honored by TAPPI with their Finishing & Converting Division Award, Thomas W. Busch Prize and Finest Faculty awards and is a TAPPI Fellow. Dave received his Ph.D. from the Web Handling Research Center where he later became an Industrial Advisory Board member.
Dave has worked for the Beloit Corporation as a designer of winding machinery and later as a manager of research, and for Kimberly-Clark as a converting expert serving all business units. He is now a principal of Finishing Technologies Inc., providing consulting services to more than 300 clients who convert or manufacture: paper, film, foil, nonwovens, textiles and many other materials. He has accumulated much practical experience working in nearly 1,000 plants over the course of more than three decades.
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