Browsing OSU - International Conference on Web Handling by Title

Now showing items 143-162 of 429

    • Gauge optimization of the reference tension and nip-load in winding systems using wound internal stresses calculation 

      Knittel, Dominique; Bencheikh, Issam; Boutaous, M'hamed; Bourgin, Patrick (Oklahoma State University, 2013-06)
      In the winding process, the quality of the roll is directly related to its stress state. The winding tension and nip-load are the most significant parameters which play an important role in the stresses generated within a ...

    • Gauge optimization of the reference tension in winding systems using wound internal stresses calculation 

      Boutaous, M.; Knittel, D.; Bourgin, P. (Oklahoma State University, 2007-06)
      In winding process, the quality of the roll is directly connected to its stress state. The winding tension is the most significant parameter which plays an important role in the stresses generated within a roll, during ...

    • General model of lateral web dynamics between two reels 

      Muftu, Sinan; Yang, Hankang (Oklahoma State University, 2013-06)
      A flexible web unavoidably deviates from its prescribed (linear) path during processing. The lateral web dynamics can be caused by tilt of rollers, web defects, off axis motion of the reels and other factors. In this work ...

    • Gentle wavy defects in knurled wound rolls 

      Cole, Kevin (Oklahoma State University, 2009-06)
      The manufacture of many products involves the winding of continuous thin, flexible webs into wound rolls. In many applications involving the use of plastic webs, it is beneficial to mechanically emboss the edges of the web ...

    • Ground-effect theory and its application to air flotation devices 

      Chang, Y. B.; Moretti, P. M. (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 ...

    • Guidelines for allowable in-plane roller misalignment using wrinkling and web break models 

      Roisum, D. R. (Oklahoma State University, 2013-06)
      While we have had wrinkling and web break models for a quarter century and the means for precision roller alignment for a half century, no consistent recommendations have been made as to allowable tolerances for roller ...

    • How core stiffness and Poisson ratio affect energy balance roll structure formulas 

      Pfeiffer, J. D.; Hamad, W. Y. (Oklahoma State University, 1991-05)
      The stiffness of the core determines how much support it will offer for the initial wraps of web material, and whether this support will be maintained as internal pressures are developed. An expression is developed for ...

    • Impact of large deformations of webs transiting rollers 

      Shi, Jinxin; Markum, Ron E.; Good, J. K. (Oklahoma State University, 2017-06)
      Webs are subjected to large out-of-plane deformations when transiting rollers in process machinery. Webs are often treated as membranes in analysis but become subject to significant bending strains when transiting rollers. ...

    • Impact of mandrel support on core Ec 

      Gerhardt, T. D.; Rykard, D.; Yang, Y. (Oklahoma State University, 2001-06)
      Over the past 15 years, Sonoco has conducted solid mechanics research focused on structural behavior of spirally wound, paper tubes. The scope of this program has included experimental, numerical, and analytical mechanics ...

    • Impact of thickness measurement on predicting residual stresses due to winding 

      Good, J. K.; Mollamahmutoglu, C.; Markum, R.; Gale, J. W. (Oklahoma State University, 2015-06)
      Axisymmetric winding models were initially developed to deal with web thickness variations that were manifested in the machine and cross machine direction. The web thickness variation is a prime input to these models. Small ...

    • Impact of web permeability on high speed web transport 

      Beuther, Paul D.; Michal, Neal J. (Oklahoma State University, 2015-06)
      Measurements of drag on a moving web in a multi-span festoon show a stronger than expected dependency on the porosity of the web with a highly non-linear relationship. The experiments suggest a wall shear stress 3-4 times ...

    • 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 ...