Browsing OSU - International Conference on Web Handling by Title

Now showing items 226-245 of 429

    • Modeling and H-infinity robust control for winding systems 

      Koc, H.; Knittel, D.; de Mathelin, M.; Abba, G. (Oklahoma State University, 2001-06)
      This paper presents the modeling and the H-infinity robust control for an elastic web transport system including an unwinder, a winder and a traction motor. This model has been created using laws of Physics concerning ...

    • Modeling and identification of the source of oscillations in web tension 

      Branca, C.; Pagilla, P. R.; Reid, K. N. (Oklahoma State University, 2009-06)
      Although there has been much work in dynamic modeling of different web handling elements and web longitudinal behavior, efforts to systematically validate models by experimentation on a web platform are non-existent. ...

    • Modeling grooved rolls with moving 2D porous media 

      Nurmi, Simo; Berstrom, Fredrik; Immonen, Eero; Lehtinen, Antti; Juppi, Kari; Martinsson, Lars (Oklahoma State University, 2009-06)
      Rolls are widely used in paper machines to heat, press and support paper webs and fabrics in order to facilitate rapid drying and transport of the paper web through the machine. In modern high speed paper machines, however, ...

    • Modeling nip induced tension in wound rolls 

      Good, J. K. (Oklahoma State University, 2001-06)
      Web materials are wound into coils by a variety of winders. Some winders center wind only. In this type of winding torque is provided to a core and web winds up on the core. Other types of winders have a roller, often ...

    • Modeling of edge rolls defects 

      Olsen, J. E. (Oklahoma State University, 1999-06)
      Based upon Hakiel's nonlinear orthotropic model for wound rolls, a model has been developed which takes into account widthwise variations in web properties. The model includes widthwise variations in the elastic modulus ...

    • Modeling of laminated webs 

      Pagilla, P. R.; Reid, K. N.; Newton, J. (Oklahoma State University, 2007-06)
      A dynamic model of the longitudinal behavior of a laminated web is developed. A single web model that takes into account both thermal and hygral strains is developed first from first principles; the model assumes heat ...

    • Modeling of nip pressures and web feed rates in rubber covered nip rollers 

      Cole, Kevin (Oklahoma State University, 2013-06)
      Nip rollers are used extensively in converting processes; however, correct design and usage of these types of rollers requires a sound understanding of the mechanics of the nip in both the machine and cross-width directions. ...

    • Modeling of the transport behavior of low modulus webs 

      Raul, Pramod R.; Pagilla, Prabhakar R. (Oklahoma State University, 2013-06)
      We consider three key issues in this study for low modulus webs. First, transport in the high strain region is considered when the materials exhibit nonlinear and viscoelastic behavior. Second, in-plane biaxial strain is ...

    • Modeling rubber covered nip rollers in web lines 

      Good, J. K. (Oklahoma State University, 2001-06)
      Rubber covered nip rollers have a number of applications within web lines. Rubber covered rollers are often used to nip the web against a metal surfaced roller that is driven to achieve a certain web velocity or web tension. ...

    • Modeling slip between a web and a roller 

      Reish, Benjamin D.; Reid, Karl N. (Oklahoma State University, 2019-06)
      In roll-to-roll processes, slip between a web and a roller may be considered a defect. Slip can cause scratches which can be detrimental to a product, if not catastrophic. As line speeds increase to meet demands for more ...

    • Modeling the behavior of the paper web in printing presses 

      Vuorinen, S.; Parola, M. (Oklahoma State University, 2005-06)
      The production efficiency of printing presses is limited by runnability problems such as web breaks, register errors, wrinkling and lateral instability of the paper web. To explore these phenomena, one must study the ...

    • Modeling the tension of the paper web 

      Vuorinen, S.; Parola, M. (Oklahoma State University, 2001-06)
      The tension distribution of a paper web in a paper machine is typically uneven and the edges of the web are normally slacker than the middle areas. This contributes to many problems not only in the paper making process but ...

    • Modeling web behaviour in printing press and in printed electronics 

      Parola, Markku; Sorvari, Joonas (Oklahoma State University, 2013-06)
      VTT together with several companies in the printing value chain have studied web handling through the printing press. Studies have focused on the web tension formation mechanisms in printing which have an effect e.g. on ...

    • Modeling web traction on rollers 

      Zahlan, N.; Jones, D. P. (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 ...

    • Modeling wound rolls using explicit FE methods 

      Kandadai, B. K.; Good, J. K. (Oklahoma State University, 2007-06)
      A new method of wound roll analysis using an explicit finite element formulation is presented in this paper. The stresses developed in center wound rolls with and without an undriven nip roller are discussed and compared ...

    • Movement of layers and induced tension in the nip area between drum and paper layers 

      Hoffmann, Peter; Desch, Michael; Dorsam, Edgar (Oklahoma State University, 2011-06)
      During paper manufacture and processing production losses occur during winding of machine-wide paper rolls and finished rolls due to winding faults. During the winding process at least one drum (steel or rubber-covered) ...

    • Moving web instability caused by the bending deflection of the support idle roller 

      Ma, Li'e; Shao, Mingyue; Wu, Jimei; Liu, Shanhui; Liu, Dingqiang (Oklahoma State University, 2015-06)
      The moving web is transported through a lot of rollers in the roll to roll process machines. These rollers are usually driven rollers, dancer rollers and idle rollers. The number of the idle roller is the largest in the ...

    • Multi-stage tensile straining during drying of SC paper 

      Kouko, J.; Kekko, P. (Oklahoma State University, 2011-06)
      During multi-cylinder drying on a paper machine, the paper web is under stress in the machine direction, whereas the cross direction is more or less free. The web shrinks due to drying and contracts due to web draws. The ...

    • Multiple-tension control using a new approach in signal-processing 

      Krebs, S. (Oklahoma State University, 1997-06)
      A new tension control system is described, which allows the simultaneous control of up to four actuators, such as drives, brakes or clutches. It incorporates four speed/torque control modules and three tension control ...

    • Myth busters: Web handling and the power of modeling 

      Lynch, Ronald (Oklahoma State University, 2013-06)
      Web handling is filled with myths and folklore about things to do and not to do, about how to design web paths, and about how to handle specific situations. The folklore and myths are often industry specific and many web ...