Theory and application of draw control for elastic webs with nipped pull rollers
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Date
1993-06Author
Spielbauer, Thomas M.
Walker, Timothy J.
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Draw control is defined as changing or maintaining web tension by controlling surface speeds of consecutive driven rollers. Even though draw control is commonly used in web handling applications, there remains some misunderstanding of the relationship between machine draw and the resulting web elongation and tension. Fundamentals of draw control and a new analytical solution will be presented. Draw control is commonly used downstream of a constant tension zone. The strain at any point in the process is dependent on the upstream tension and the added web strain from the machine draw. Recent experimental studies of draw control have revealed a previously unknown influence of nip roller load, similar to pack rollers at winding. Models for nipped pull roller slip conditions, and nip induced draw and tension will be presented.
Citation
Spielbauer, T. M., & Walker, T. J. (1993, June). Theory and application of draw control for elastic webs with nipped pull rollers. Paper presented at the Second International Conference on Web Handling (IWEB), Stillwater, OK.