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Now showing items 321-330 of 429
Comparison of multi-span lateral dynamics models
(Oklahoma State University, 2015-06)
It's obvious that when a web changes its lateral position at a roller, subsequent spans will be affected. Less obvious, is the fact that transient stress variations will also affect downstream spans. Multi-span models are ...
Roller nip deflections
(Oklahoma State University, 2017-06)
Rubber covered nip rollers are used in many web handling and processing applications. Successful use of these systems requires an accurate knowledge of the impact of various design and process parameters on key response ...
Wound-on-tension for two drum winders
(Oklahoma State University, 2003-06)
The two drum winder remains to be a high productivity winder for rewinding some paper and nonwoven webs at very high speeds. Winding models of varied capabilities exist for center winders, center winders with rider rollers, ...
Mechanics of non-uniform webs
(Oklahoma State University, 1999-06)
This paper lays the groundwork in an effort to determine appropriate boundary conditions and basic principles that can be used to extend current web mechanics models to include webs that are not "initially straight and ...
Theory and application of draw control for elastic webs with nipped pull rollers
(Oklahoma State University, 1993-06)
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 ...
Finite element analysis of winding nip mechanics
(Oklahoma State University, 2009-06)
Wound-on-Tension (WOT) is the tension in the outermost layer of a winding roll that is created due to the incoming web tension and the tension induced by the nip roller called Nip-Induced-Tension (NIT). This paper presents ...
Estimation of air film thickness between moving webs and guide rollers
(Oklahoma State University, 1997-06)
In this paper, in order to estimate an air film thickness between moving web and guide roller (web spacing height), the air film thickness formula was derived based on the finite width compressible foil bearing theory. In ...
Predicting the web length and layers in a wound roll
(Oklahoma State University, 2019-06)
The length of web in a wound roll is one mark of roll quality. The available web length in a roll is a concern for many who process webs and those who convert webs. There are algorithms that estimate the length of web and ...
Measurement of web curl
(Oklahoma State University, 2017-06)
Generally it is desirable for web based products to have a flat planar shape. Unfortunately coated and laminated products often assume a curved shape. This is a defect commonly called "Curl". The first step in solving most ...
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 ...