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Calculating coilset based on curvature of a web
(Oklahoma State University, 2003-06)
A web which has passed over a roll can exhibit coilset due to differential yielding of fibers through its thickness. Modeling can provide a radius of curvature, R, the web would achieve if no external forces were applied. ...
Phenomens of rolling contact in paper calendering
(Oklahoma State University, 2009-06)
In soft calenders synthetic roll covers are "state of the art", without knowing their detailed rolling contact behavior and their phenomenological effects to gloss and smoothness of paper. Complex interactions of process ...
Non-linear tension control in a winding process by using the contact roll
(Oklahoma State University, 1997-06)
In a web winding process, the contact roll plays many important roles including air-entrainment control and WIT (Winound In Tension) regulation. The behavior of the contact roll significantly affects the winding tension ...
Vibration and stability of axially moving webs coupled to surrounding air
(Oklahoma State University, 2003-06)
High-speed web flutter is of significant importance in a variety of paper, plastics, textiles, and sheet metal industries. The natural frequencies of vibration and the onset of flutter in thin, wide, high-speed webs are ...
Effect of mass transfer on multi-span lateral dynamics of nonuniform webs
(Oklahoma State University, 2017-06)
Since the publication of Shelton's original work [1] on lateral web dynamics in 1968, the cambered1 web has attracted the attention of researchers. Shelton, himself, felt it was a natural "next step" in lateral dynamics. ...
Development of intelligent plastic film winder "Windstar"
(Oklahoma State University, 2015-06)
Flexible continuous plastic films are used to produce various products, including optical films and packaging materials, because plastic film is suited to use in mass production manufacturing processes. Generally, the web ...
Explicit analysis of the lateral mechanics of webs transiting concave rollers
(Oklahoma State University, 2011-06)
All previous analyses of webs encountering spreading devices have required enforcement of assumed boundary conditions. An example is the normal entry boundary condition which has been employed in many web/roller analyses. ...
Interaction between two web spans because of a misaligned downstream roller
(Oklahoma State University, 2005-06)
Fourth order differential equations for two web spans are solved, with the required eight boundary conditions reflecting conditions at the upstream end of the first span, the downstream end of the second span (at the ...
Behavior of a flexible web in contact with a roller
(Oklahoma State University, 2013-06)
In the contact patch between a web and a roller, there may be regions of stick and microslip or full slip. Within the stick zone, the velocities of web and roller surface match, but in the microslip zone they differ by a ...
Effects of parameter uncertainties on longitudinal web dynamics
(Oklahoma State University, 2013-06)
Web handling systems are very common in industry for metal, paper, textile and polymer material treatments. The key variables to monitor and control are the web speed and web tension in each span. The objective is to reach ...