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Comparison of center and surface winding using the wound-in-tension method
(Oklahoma State University, 1999-06)
Pfeiffer first defined the wound-in-tension measurement in 1968[1]. This technique requires the outer layer of web to be pulled away from a winding roll and a measure of the web tension is made prior to returning the web ...
Shear in multispan web systems
(Oklahoma State University, 1997-06)
Wrinkling research has been concentrated in past years on understanding web wrinkling in isolated spans in web lines [1]. It is expected that some of the fundamentals which govern single span behavior will also apply to ...
Using FSRs to measure radial pressure in wound rolls
(Oklahoma State University, 1991-05)
The Force Sensing Resistor (FSRTM)1 is a device which changes resistance in a predictable manner with the application of force on its surface.[1] The FSR has been used in a variety of applications since its invention in ...
Stresses within rolls wound in the presence of a nip roller
(Oklahoma State University, 1991-05)
Models which can be used to calculate the internal stresses within wound rolls of web material have all been confined to the center winding technique to date. In this publication a new boundary condition is presented which ...
Entrained air films in center wound rolls - with and without the nip
(Oklahoma State University, 1997-06)
Development of analytical expressions predicting the thickness of fluid layers in the area of a foil bearing has been ongoing for nearly forty years. These expressions have been adapted to include air as the lubricating ...
Shear wrinkling in isolated spans
(Oklahoma State University, 1997-06)
Web wrinkling is a problem which plagues the web process industry. Most webs are quite thin, on the order of 4-150 μm, and become subject to lateral shear during transport either by misaligned rollers or by guide rolls. ...
Effect of air entrainment in centerwound rolls
(Oklahoma State University, 1993-06)
Internal stress models for centerwound rolls have existed for over thirty years but no model to date has accounted for air which is entrained due to the web velocity and the viscosity of air. This paper reports the results ...
Wrinkling of webs due to twist
(Oklahoma State University, 1999-06)
Webs are often required to endure twisting in web process machinery. There is a limit to the degree to which the web can be twisted prior to wrinkling. The objective of this publication is to document a closed form technique ...
Nonlinear orthotropic viscoelastic winding model
(Oklahoma State University, 1995-06)
A realistic and adaptive viscoelastic model for prediction of transient wound roll stress distributions is presented. The web material is taken to be orthotropic with a nonlinear radial creep compliance dependent upon ...
Importance of torque capacity in predicting crepe wrinkles and starring in wound rolls
(Oklahoma State University, 1995-06)
Roll models provide information about the radial stresses and circumferential stresses that exist in a wound roll of web material. A derived quantity that is available from the radial stress profile is the torque capacity. ...