Browsing Proceedings of the International Conference on Web Handling by Title

Now showing items 154-173 of 429

    • Impacts of a 90 degree twist on lateral web dynamics 

      Carrle, Jeremy; Lange, Steve; Ba, Shan (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 ...

    • Importance of torque capacity in predicting crepe wrinkles and starring in wound rolls 

      Good, J. K.; Vaidyanathan, N. (Oklahoma State University, 1995-06)
      Roll models provide information about the radial stresses and circumferential stresses that exist in a wound roll of web material. A derived quantity that is available from the radial stress profile is the torque capacity. ...

    • Improvement of control of a web accumulator 

      Shelton, John J. (Oklahoma State University, 2009-06)
      Previous analysis of the dynamics of a conventional accumulator (no driven rollers within the accumulator, with all rollers identical) was published by Shelton [1]. This 1999 analysis showed that such accumulators commonly ...

    • Improvement of slippage and wrinkling of transporting webs using micro-grooved rollers 

      Hashimoto, Hiromu; Hikita, Shinji (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 ...

    • Improvement of web spacing characteristics by two types of guide rollers 

      Hashimoto, H. (Oklahoma State University, 1999-06)
      In the manufacturing fields of plastic sheet, paper, magnetic tape, thin metal plate, photographic film etc., the web transporting systems supported by guide rollers are often used. In such systems, it is of cardinal ...

    • 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 ...

    • In-roll stress analysis of wound roll with the air entrainment and the permeation 

      Tanimoto, K. (Oklahoma State University, 2001-06)
      The quality of a wound roll is highly dependent upon the in-roll stress distribution, which is controlled by the operating parameters of center torque, nip and tension. With increasing demands for higher performance of ...

    • Industrial use for the "nip-inducted effect" to separate sheets 

      Desch, M.; Dorsam, E.; Kaulitz, T. (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 ...

    • Inexpensive multipoint roller speed measurement system 

      Bentz, A. R. (Oklahoma State University, 1997-06)
      Machines that manufacture photographic web products use rollers to convey the web. Product imperfections, like scratches and scuff marks, are caused by loss of traction between these rollers and the web. Loss of traction ...

    • Influence of heating on tensile and relaxation behavior of wet paper 

      Kouko, Jarmo; Retulainen, Elias; Kekko, Pasi (Oklahoma State University, 2013-06)
      The influence of increasing temperature on the strength and relaxation of wet never-dried paper was studied using C-IMPACT, a tensile tester equipped with a special heating chamber. The heating device formed a small climate ...

    • 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 ...

    • Influence of web warpage on the lateral dynamics of webs 

      Benson, R. C. (Oklahoma State University, 1999-06)
      The transport of long flexible webs is of great importance in many manufacturing applications, including the processing of paper, textiles, magnetic tapes and photographic film. Beginning with the pioneering work of Shelton ...

    • Installation and performance of classical web guides 

      Shelton, J. J. (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 ...

    • Instrumenting rolling nips for video recording and strain recording 

      Pfeiffer, J. D. (Oklahoma State University, 1993-06)
      An apparatus has been constructed to study the effect of a rolling nip on multiple layers of paper or other material. The use of a roller in contact with the surface of a winding product roll excludes air and produces ...

    • Intelligent roll platform for better runnability 

      Pitkanen, Tatu; Bettendorf, Bob; Tuomisto, Martti (Oklahoma State University, 2009-06)
      An intelligent roll is a mechatronic system consisting of a roll in a web handling machine that is also used as a transducer for sensing cross machine tension or linear load. The intelligent roll has electret film force ...

    • 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 ...

    • Interactions of time dependent, thermal and hygroscopic characteristics and runnability properties of paper 

      Welp, E. G.; Niebuhr, V. (Oklahoma State University, 2007-06)
      For purposes of design and optimization of industrial processing, many of the physical properties of paper have to be taken into account. The knowledge of the mechanical properties as part of the physical ones must be ...

    • 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 ...

    • Irreversible reduction of foil tension due to aerodynamical effects 

      Bouquerel, F.; Bourgin, P. (Oklahoma State University, 1993-06)
      Computation of the residual stress generated during the winding of a plastic film has been coped with by many authors. These studies are based on the assumption that the residual stresses mainly depend on two winding ...

    • Issues in modeling slitting of magnetic tapes 

      Andruet, R. H.; Cook, R. F.; Qualls, W. R. (Oklahoma State University, 2003-06)
      In order to quantify and understand the driving force for film layer fracture, delamination, and the cutting phenomena in general, an idealized two-dimensional "slitting" model was developed. The model includes two lower ...