Browsing OSU - International Conference on Web Handling by Author "International Conference on Web Handling (2005)"
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Abilities and inabilities of wound roll models to predict winding defects
Good, J. K. (Oklahoma State University, 2005-06)Wound roll models began appearing in the literature 40 years ago. These models predict internal stresses within wound rolls due to winder operating conditions and web material properties. The models have progressed much ... -
Adaptive, self-underpressurizing suction roll for fast web handling concepts
Kurki, M.; Martihainen, P. (Oklahoma State University, 2005-06)In web handling one of the most demanding area is nip or pocket area for incoming or outgoing web. Depending on speed of web and rotating roll surfaces, boundary layers transport air causing negative or positive relative ... -
Analysis of trough formation and lateral steering of a web due to a tapered downstream roller
Beisel, J. A.; Good, J. K. (Oklahoma State University, 2005-06)Cylindrical rollers are never perfectly cylindrical. A common defect of a cylindrical roller is radial taper. A roller with a radial taper will induce a lateral shear force into the web. This shear force will cause a ... -
Challenges and opportunities in flat panel industry
Fuchigami, S. (Oklahoma State University, 2005-06)The Flexible Panel Display (FPD) business is rapidly growing in Asia. Many industrial companies not only from traditional coating industries but from others such as electronics, printing, and film manufacturing industries, ... -
Complete material law of paper for modelling and simulation of finishing processes
Welp, E. G.; Wolf, E.; Niebuhr, V. (Oklahoma State University, 2005-06)A complete three-dimensional material law is necessary for the mathematical description of the material behaviour and for the simulation and calculation of finishing or converting processes. In order to achieve this goal, ... -
Control and online tension reference optimization in winding systems: Application to an identified three-motors simulator
Knittel, D.; Bourgin, P.; Boutaous, M. (Oklahoma State University, 2005-06)It is well known that the tension reference value, which a priori guarantees a good quality roll, is based on the stress generated within the roll. However, due to the imperfections of the winding systems and to the limited ... -
Effect of compliance and backlash on the output speed of a transmission system
Ramamurthy, R. V.; Pagilla, P. (Oklahoma State University, 2005-06)Backlash is one of the most commonly encountered nonlinearities in drive systems employing gears or ball-screws and indicates the play between adjacent movable parts. Presence of backlash causes delays and oscillations and ... -
Effects of concave rollers, curved-axis rollers and web camber on the deformation and translation of a moving web
Brown, J. L. (Oklahoma State University, 2005-06)A new method of analysis is applied to three problems that have resisted detailed solution. These are: -
In-roll stress analysis considering air-entertainment at the roll-inlet with the effect of grooves on nip roll surface
Sasaki, M.; Kohno, K.; Tanimoto, K.; Takahashi, S.; Suzuki, S.; Hashimoto, H. (Oklahoma State University, 2005-06)High-speed winding of paper web sometimes leads the winding system into unstable states, interlayer slippage of wound roll, paper breakage and so on, due to the excessive air-entrainment at the roll-inlet of nip contact ... -
Influence of the gap throttle effect on the winding process and roll quality
Welp, E. G.; Kleinert, A.; Smukala, V. (Oklahoma State University, 2005-06)In the paper industry the winding technology has a significant influence on the quality of finished rolls. The rising productivity and quality efforts require a constant optimization of the winding process concerning the ... -
Interaction between two web spans because of a misaligned downstream roller
Shelton, J. J. (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 ... -
Investigation of fluid mechanics of slotted air-jets for air reverser applications
Lopez, E.; Muftu, S. (Oklahoma State University, 2005-06)The fluid mechanics of the air flow, caused by a series of impinging air-jets, in a constant-height, rigid channel is investigated using computational fluid dynamics (CFD). The primary goal of this work is to investigate ... -
Lateral mechanics of baggy webs at low tensions
Olsen, J. E. (Oklahoma State University, 2005-06)Existing mathematical models describing lateral movement of webs such as paper or plastic film, assume that the entire width of the web is carrying tension or that the web is capable of supporting compressive stresses. For ... -
Mechanics of a thin web wrapped helically about a turn bar
Muftu, S. (Oklahoma State University, 2005-06)The mechanics of the interactions between a flexible web and an externally pressurized air cushion is modeled. The web is wrapped around the porous cylindrical turn-bar at an oblique angle (helically). The turn-bar supplies ... -
Modeling the behavior of the paper web in printing presses
Vuorinen, S.; Parola, M. (Oklahoma State University, 2005-06)The production efficiency of printing presses is limited by runnability problems such as web breaks, register errors, wrinkling and lateral instability of the paper web. To explore these phenomena, one must study the ... -
New method for analyzing the deformation and lateral translation of a moving web
Brown, J. L. (Oklahoma State University, 2005-06)A new method is presented for modeling the elastic behavior of webs conveyed over rollers. In addition to producing detailed descriptions of stress fields, it provides a new way of looking at problems that will help web ... -
On the durability of cores and rest roll dynamics
Ilomaki, M. (Oklahoma State University, 2005-06)The printing industry is facing the same challenges as many other industries, in that demand is increasing for its processes to run faster and more reliably. Roll weight, width and web speed are steadily increasing which ... -
Optimization by integrating engineering and business models
Roisum, D. R. (Oklahoma State University, 2005-06)To optimize is to find the "'best" solution given certain conditions and constraints. What is meant by best and how to find it has received scant attention. To the engineer, "best" may be fastest, strongest, most reliable ... -
Prediction model of paper-web wrinkling and some numerical calculation examples with experimental verifications
Hashimoto, H. (Oklahoma State University, 2005-06)In the web handling technology, it is very important engineering problems to predict and protect web wrinkling from several view points of product quality, manufacturing cost and so on. In this paper, the prediction model ... -
Recent advances in web longitudinal control
Pagilla, P. R.; Knittel, D. (Oklahoma State University, 2005-06)Stable web transport through processing machinery is critical in the web processing industry. Demands for improved performance under a wide variety of dynamic conditions and web materials are placing additional emphasis ...