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Now showing items 1-10 of 11
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 ...
Interaction between two web spans because of a misaligned downstream roller
(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 ...
Dynamics of a web accumulator
(Oklahoma State University, 1999-06)
A conventional accumulator with no driven rollers and all rollers identical is studied for avoidance of excessive tension, slackness and slippage on the rollers. The total force imposed by the web spans on the carriage is ...
Limitations to sensing of web tension by means of roller reaction forces
(Oklahoma State University, 1999-06)
Classical frequency response analysis of a dancer or a roller mounted on load cells reveals that such devices are severely limited in their ability to sense the dynamic tension in a web. The response of a tension control ...
Simplified model for lateral behavior of short web spans
(Oklahoma State University, 2001-06)
For ratios of L/W less than approximately 2.0, the effects of shear stresses on the shape of a web must be considered. In basic manufacturing and processing of webs, such ratios are very common. The analysis of a general ...
Aerodynamic dancer in web handling
(Oklahoma State University, 2007-06)
This paper discusses the aerodynamic dancer that is effective in a wide range of frequency and do not cause excessive lateral web deflection, touching, or flutter. An aerodynamic model of air-turn bar has been developed. ...
Shear wrinkling in isolated spans
(Oklahoma State University, 1997-06)
Web wrinkling is a problem which plagues the web process industry. Most webs are quite thin, on the order of 4-150 μm, and become subject to lateral shear during transport either by misaligned rollers or by guide rolls. ...
Installation and performance of classical web guides
(Oklahoma State University, 2003-06)
This paper depicts proper installations of conventional web guides and examines the theory of web mechanics and the theory of automatic control as foundations for the practice of web guiding. Conditions which would damage ...
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 ...
Effects of web camber on handling
(Oklahoma State University, 1997-06)
The definition of camber and a laboratory method of measurement of camber are presented. Common problems caused by camber and methods for avoidance of these problems are discussed.