Bowed Roller Failure Modes – Kinks in Curvature

Bowed roller quality can be measured in many ways.  One is appropriately sized curvature (bow magnitude) that we cover in great detail in our Web101 class.  (The last one this year in the US is Aug 22-23 in Patterson NJ, though you can take it anytime as video-on-demand).  Another is a reasonably uniform curvature arc as we discuss here; perhaps the only time in the literature, internet or otherwise.  Putting these two quality metrics together we would have a uniform spreading profile.  In other words, the CD stress (unslit webs) or gaps (slit webs) would be consistent across the width.  If the curvature is too high and especially if the curvature quality is poor, we can have the tendency to wrinkle at local lanes instead of spread.  The former is called ‘quarter-point’ spreading problems and the latter ‘kinks’ in the bow.

Web201.44e – Bowed Roller Failure Modes – Kinks in Curvature

https://www.youtube.com/watch?v=IRz3Br8SkEg

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