Browsing Proceedings of the International Conference on Web Handling by Issue Date
Now showing items 41-60 of 429
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Air support conveyance of uniform and non-uniform webs
(Oklahoma State University, 1993-06)A web span model and solution technique have been developed to determine the stresses and deflections of uniform and non-uniform webs, subject to side loading from an air support system. Formulas are given to calculate the ... -
Dynamic behavior of dancer subsystems in web transport systems
(Oklahoma State University, 1993-06)A dancer subsystem may be used as a tension measurement or as a disturbance attenuator depending on its design. The design of a dancer subsystem to accomplish a desired result requires the development of a dynamic model ... -
Study of three-dimensional nonlinear nip mechanics
(Oklahoma State University, 1993-06)An understanding of nip pressure and deformed nip geometry is of vital importance to the design of web handling equipment. Axial variations in nip pressure and deformed nip geometry can lead to poor product performance 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 ... -
Computing wound roll stresses based upon web surface characteristics
(Oklahoma State University, 1993-06)Historically wound roll models have required the input of a radial modulus of elasticity. Heretofore this modulus has been measured using material testing systems which have shown the radial modulus to be dependent upon ... -
Analysis of web spreading induced by the concave roller
(Oklahoma State University, 1993-06)This paper describes the development of a model for predicting the elastic deformations and stresses in a web crossing a concave (or negative crown) roller. The Finite Element Method was used to compute web displacements, ... -
Simulation of wrinkling patterns in webs due to non-uniform transport conditions
(Oklahoma State University, 1993-06) -
Analysis of web spreading induced by the curved axis roller
(Oklahoma State University, 1993-06)This paper describes the development of a model for predicting the elastic deformations and stresses in a web crossing a curved-axis roller. The Finite Element Method was used to compute web displacements, forces and ... -
Tension control of webs - A review of the problems and solutions in the present and future
(Oklahoma State University, 1995-06)Production plants with continuous moving webs have a complex structure where mechanical and electrical problems are involved. To solve the problems of this systems, it is necessary to take into account the total system to ... -
Coupling between out-of-plane displacement and lateral stability of webs in air-support ovens
(Oklahoma State University, 1995-06)In drying ovens where the web zig-zags over and under air-support bars, the web sometimes drifts to one side or the other until it runs into the oven wall. This divergence is shown to be coupled to out-of-plane displacements ... -
On the web tension dynamics in an open draw
(Oklahoma State University, 1995-06)Increasing productivity of paper machines, i.e. speeds, and requirements on decreasing basis weights of paper grades demand a deeper insight of the web tension behavior in the open draws. Runnability of a paper machine is ... -
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 ... -
Stick-slip behavior of paper during friction testing
(Oklahoma State University, 1995-06)Paper often exhibits oscillatory stick-slip motion during friction testing using a horizontal sled apparatus. The motion consists of a constant-amplitude oscillation in the force required to move the sled, which may ... -
From predictive models to profitability in the web-handling industry
(Oklahoma State University, 1995-06)This paper attempts to put some of the work being done by researchers in the web-handling field, including some of the papers to be presented at this conference, into a broader business context. Various ways of utilizing ... -
Non-interacting tension control in a multi-span web transport system
(Oklahoma State University, 1995-06)A non-interacting tension control algorithm is proposed to reject the disturbance due to the interaction between neighboring processing sections. An 'auxiliary dynamic model' is derived. And an 'auxiliary controller' is ... -
Modeling web traction on rollers
(Oklahoma State University, 1995-06)When web tension changes between entry and exit on a roller, the tension change occurs in a slip zone in the last part of the wrap, whose size is given by the well-known Capstan or Belt equation. A method for modelling ... -
Effects of nip parameters on media transport
(Oklahoma State University, 1995-06)The mechanics of a web being transported through a set of elastomeric rollers has been investigated. Three general classes of roller materials are identified. These nip materials are then characterized by the speed at which ... -
Ground-effect theory and its application to air flotation devices
(Oklahoma State University, 1995-06)The ground-effect theories, originally developed for air cushion vehicles (or ground-effect machines), are re-examined and compared with the air bar test results. The geometries of the tested air bars are different from ... -
Electromagnetic lateral control system of floating strip
(Oklahoma State University, 1995-06)Strip floating system is effective to avoid strip wrinkles and defects caused by roll contact, and to keep high quality of steel strip in the continuous processing lines. -
Matrix interpolation based self-tuning web tension regulation
(Oklahoma State University, 1995-06)A self-tuning control scheme is proposed for tension regulation in a web transport system. A matrix interpolation based computationally efficient self-tuning method is first described. The frequency domain model of the ...