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Now showing items 101-110 of 153
Design of contoured rollers for web spreading
(Oklahoma State University, 2001-06)
Contraction of a web in the cross width direction while running over rollers can be traced to runability problems and wound roll defects. These defects may include troughing, baggy lanes, wrinkles and registration difficulties ...
Measurement of nip induced tension and contact stresses
(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). Kandadai and Good ...
New objective method for quantitative assessment of cut edge quality for paper and board
(Oklahoma State University, 2001-06)
In the paper converting and finishing industry the cut edge quality is of particular importance to the manufacturing processes, e.g. the printing process. In this paper an objective method for the quantitative evaluation ...
Applying hundreds of years of scientific and engineering knowledge in 50 years of time
(Oklahoma State University, 2007-06)
Aspects of lateral behavior discussed in this paper include (1) the concept of a web span as a tensioned beam, analyzed for large ratios of L/W, small ratios, and general ratios, and (2) static interaction of two spans and ...
Improvement of slippage and wrinkling of transporting webs using micro-grooved rollers
(Oklahoma State University, 2009-06)
We describe an entirely new method of improving the slippage between web and roller. First, the concept of a micro-grooved roller is introduced, and then a theoretical model for estimating the slip onset velocity under the ...
Modeling wound rolls using explicit FE methods
(Oklahoma State University, 2007-06)
A new method of wound roll analysis using an explicit finite element formulation is presented in this paper. The stresses developed in center wound rolls with and without an undriven nip roller are discussed and compared ...
Theoretical modeling of traction characteristics between paper-web and steel-roller based on the contact mechanics
(Oklahoma State University, 2005-06)
This report describes the theoretical modeling of friction coefficient between uncoated paper web (newsprint; for example) and steel roller. In the modeling, the paper base is approximated by the linear spring and surface ...
Predicting web wrinkles on rollers
(Oklahoma State University, 2009-06)
There are two levels of web instability in web lines. The first level of web instability is called web troughs. Web troughs are due to the instability of webs that occur in free web spans. Web troughs have been shown to ...
Wound-in-tension in a non-woven web
(Oklahoma State University, 2005-06)
Literature on wound roll structure of non-homogeneous webs is scarce. Experimental and analytical research on wound roll structure of homogeneous materials such as plastic films and paper has been reported extensively, ...
Method for measuring wound-on-tension
(Oklahoma State University, 2003-06)
The Wound On Tension (WOT) is the web machine direction stress as it has just passed the winding nip into the roll. It is the most important quantity that determines the wound roll structure and its internal radial stress ...