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Now showing items 71-80 of 153
Computation of span length variations due to out-of-round material rolls
(Oklahoma State University, 2009-06)
It is well known that non-ideal elements such as out-of-round/eccentric material rolls affect web tension. However, the mechanism through which these non-ideal components induce tension oscillations was not clear previously. ...
Mechatronic damping for contact rolls in film winders
(Oklahoma State University, 2007-06)
The winding of a web is one of the most extensive and error-prone processes in web handling. All known solutions are limited in the range of properties and production parameters. To broaden the mentioned limits, a new ...
Study of stress-strain relation for paper roll
(Oklahoma State University, 2001-06)
In the present method a wound roll of paper is loaded against a nip roller and the measured values of the nip width and the roll indentation are compared with the corresponding calculated values of the non-linear problem. ...
Real time dynamic simulation for control system software verification
(Oklahoma State University, 2001-06)
It is a common practice in the paper industry to verify large portions of the control system software during machine commissioning. This is inefficient since the verification is done under production conditions when time ...
Web sag and the effect of camber on steering
(Oklahoma State University, 2007-06)
A web in a horizontal span will deflect downwards due to gravity. This sag is more pronounced for heavy materials in long spans under low tension. It is possible for a web whose unstretched length is greater than the span ...
Buckling of orthotropic webs in process machinery
(Oklahoma State University, 2003-06)
Many webs in web process machinery exhibit out-of-plane deformations, defined as troughs, in free web spans between rollers. In other cases when the troughs become severe the out-of-plane web deformations will begin to ...
Practical application of idler roller performance measurements and models
(Oklahoma State University, 2003-06)
Idler rollers are present in abundance on most web processing lines. Their simple design, a rotating cylinder driven by the web-to-roller traction, lead most to go unmonitored until degrading performance results in product ...
Effects of non-ideal webs on roll winding
(Oklahoma State University, 2003-06)
In typical winding processes, webs are rarely (if ever) ideal but instead thickness non-uniformity and distortions (two examples) are the norm. These deviations from ideal have significant ramifications to both predictive ...
Prevention of wound roll defect of coated web
(Oklahoma State University, 2009-06)
The web which is coated with a coating agent on the surface to add a function is called coated web. This coated web is often made into wound roll to ease handling and storage after coating, and then it is passed to next ...
Practice application and design of concave rollers
(Oklahoma State University, 2007-06)
A concave roller is an effective and inexpensive wrinkle-preventing roller design. By definition, a concave roller (a.k.a. a reverse-crowned roller) is a roller with a larger diameter at the edges than at its center. But ...