Browsing OSU - International Conference on Web Handling by Title

Now showing items 246-265 of 429

    • New decentralized control in processing machines with continuous moving webs 

      Wolfermann, W.; Schroeder, D. (Oklahoma State University, 1993-06)
      Web-products are manufactured in sections of rollers which transport the web according to specific technological demands. To achieve the required final product, the transport of the web has to be successful without material ...

    • New governing equation for web tension by employing a Neo-Hookean material model 

      Gomez-Constante, A. R.; Pagilla, Prabhakar R.; Rajagopal, K. R. (Oklahoma State University, 2019-06)
      In this work, we derive a governing equation for web tension in a span by employing a Neo-Hookean material model that is applicable for transport of web materials under both small and large strains. This governing equation ...

    • 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 ...

    • New method for measurement of wound-in-tension in webs wound into rolls 

      Good, J. K.; Kandadai, B. K.; Markum, R. (Oklahoma State University, 2007-06)
      The Wound-In-Tension (WIT) is the tension in the outermost layer of a winding roll. The Wound-In-Tension is an important parameter that controls the stresses inside the wound roll which in turn determines the quality of ...

    • New model for the steady state deformation and friction of webs on rollers 

      Jones, Dilwyn P. (Oklahoma State University, 2017-06)
      A web moving through process machinery interacts with rollers through frictional forces, which may change its direction of motion and tension. By modelling the web as a beam, these forces can be calculated from its tension, ...

    • New objective method for quantitative assessment of cut edge quality for paper and board 

      Welp, E. G.; Wolf, E.; Heindl, J. (Oklahoma State University, 2001-06)
      In the paper converting and finishing industry the cut edge quality is of particular importance to the manufacturing processes, e.g. the printing process. In this paper an objective method for the quantitative evaluation ...

    • New parameter for dynamic characterization of PET film surface topography 

      Boutaous, M.; Bourgin, P. (Oklahoma State University, 1999-06)
      It is well-known that handling and winding flexible media involve aerodynamic phenomena which are crucial for the process. Among those parameters which govern the final thickness value of the air layers separating the film ...

    • Nip impinged center-winding including a nonlinear beam model 

      Mollamahmutoglu, C.; Good, J. K.; Markum, R.; Gale, J. W. (Oklahoma State University, 2017-06)
      Nip pressure is commonly applied in winding processes in order to maintain structural stability and prevent air entrainment at high speeds. In nip induced winding modeling nip and roll are assumed to be beams with ...

    • Nip mechanics of nano-impression lithography in roll-to-roll process machines 

      Ren, Yao; Good, J. K. (Oklahoma State University, 2017-06)
      Nano-Impression Lithography (NIL) has been demonstrated to produce nano features on webs that have value to society. Such demonstrations have largely been the result of NIL processes that involve the discrete stamping of ...

    • Non-interacting tension control in a multi-span web transport system 

      Shin, K. H.; Reid, K. N.; Kwon, S. O. (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 ...

    • Non-linear tension control in a winding process by using the contact roll 

      Shin, K. H.; Kim, K. T.; Cheon, S. M. (Oklahoma State University, 1997-06)
      In a web winding process, the contact roll plays many important roles including air-entrainment control and WIT (Winound In Tension) regulation. The behavior of the contact roll significantly affects the winding tension ...

    • Nonlinear finite element model for web spreading 

      Stack, K.; Perconti, J.; Jeans, A.; LaFleche, J.; Benson, R. (Oklahoma State University, 1997-06)
      This study concerns the modification of a commercial finite element code (ABAQUS) to efficiently model webs moving over stationary, frictional guides. This modification will allow the user to refine the mesh in areas of ...

    • Nonlinear model to calculate the stressed state of a center-wound roll 

      Piper, C. A. (Oklahoma State University, 1995-06)
      This work develops a model to calculate the stressed state of center-wound rolled webs, such as film, paper, or foil. The model is built on a lesser known linear model developed by Umanskii and accounts for the nonlinear ...

    • Nonlinear orthotropic viscoelastic winding model 

      Qualls, W. R.; Good, J. K. (Oklahoma State University, 1995-06)
      A realistic and adaptive viscoelastic model for prediction of transient wound roll stress distributions is presented. The web material is taken to be orthotropic with a nonlinear radial creep compliance dependent upon ...

    • Observations on the vibrations of paper webs 

      Raman, A.; Wolf, K.-D.; Hagedorn, P. (Oklahoma State University, 2001-06)
      Frequency clustering and edge vibration localization of thin, wide, high-speed translating webs are investigated using a linear, translating, tensioned Kirchhoff plate model with very small but finite bending stiffness to ...

    • 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 ...

    • On the dynamics of web transfer in an open draw 

      Pakarinen, Pekka; Ryymin, Risto; Kurki, Matti; Taskinen, Pekka (Oklahoma State University, 1993-06)
      A paper web running in an open draw of a high speed paper machine is subjected to various internal and external forces which stretch it and which can ultimately rupture it. The forces arise from speed differences between ...

    • On the effect of width direction thickness variations in wound rolls 

      Hakiel, Z. (Oklahoma State University, 1991-05)
      A first order model has been developed, which predicts the widthwise variability in wound roll diameter and stresses. This model has been verified experimentally on wound rolls of film and qualitative agreement between the ...

    • On the governing equation for web tension with out-of-round rolls 

      Branca, Carlo; Pagilla, Prabhakar R.; Reid, Karl N. (Oklahoma State University, 2013-06)
      In roll-to-roll (R2R) manufacturing the presence of non-ideal elements, such as out-of-round or eccentric rolls, induces periodical oscillations in the web tension signal. Model simulations based on ideal elements do not ...

    • On the web tension dynamics in an open draw 

      Kurki, M.; Juppi, K.; Ryymin, R.; Taskinen, P.; Pakarinen, P. (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 ...