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Now showing items 41-50 of 429
Industrial use for the "nip-inducted effect" to separate sheets
(Oklahoma State University, 2009-06)
This paper introduces an analytical method for the explanation of the nip inducted effect. This effect is known for a long term as a disturbance effect in the web handling industry. Here it is used for breaking bindings ...
Wound roll stress analysis including air entrainment and the formation of roll defects
(Oklahoma State University, 1995-06)
Numerous procedures have been developed to determine the stresses inside wound rolls of film. These typically use factors such as winding tension, film thickness and film properties to calculate the stresses. The calculation ...
Using finite element model to define how wrinkles form in a single web span without moment transfer
(Oklahoma State University, 1991-05)
This paper describes a finite element model that successfully predicts the formation of troughs and shear wrinkles in plastic webs for a single span bounded by two idler rollers. For this model, wrinkles are created when ...
Lateral mechanics of an imperfect web
(Oklahoma State University, 2001-06)
A model describing the lateral mechanics of an imperfect web has been derived which brings forward information on the much debated fourth boundary condition. The model is based upon a generalized beam theory. Calculations ...
Fully nonlinear solution to the stresses inside wound rolls
(Oklahoma State University, 1999-06)
The Hakiel approach has been the accepted method for calculating stresses in wound rolls. It determines the stress in rolls by summing the stress induced by wraps of film applied to the roll surface. This approach is called ...
Century of web handling literature
(Oklahoma State University, 2011-06)
This paper is a review of some 3,500 published works in the areas of web handling, winding, converting and related subjects. These individual works include articles, books, columns, conference papers, instruction manuals, ...
Wrinkling of wide webs
(Oklahoma State University, 2011-06)
Wrinkling remains one of the top causes of converting process waste. Though wrinkles created by roller misalignment and web bending (shear wrinkles) are well-understood, nearly all the published research and modeling has ...
Air entrainment on two sides of a web passing through the nip of two rigid rolls
(Oklahoma State University, 2001-06)
When web materials (paper, plastic films, or metal foils) are wound into rolls, excessive amounts of air can be entrapped between layers of the web, resulting in defective rolls. Entrapped air layer between a coated film ...
What we know that just isn't so
(Oklahoma State University, 2007-06)
This paper proposes a metric for the permeation of the science of web handling into industry. The variable of interest is misunderstandings, myths if you will, that are common in plants. The origin of the myths is unimportant ...
Impacts of a 90 degree twist on lateral web dynamics
(Oklahoma State University, 2015-06)
Twists are sometimes used to turn or provide passive lateral control for narrow webs in those cases where space for a sufficient twist span length (to avoid a wrinkle) is achievable. This paper uses the finite element ...