Browsing Proceedings of the International Conference on Web Handling by Title

Now showing items 360-379 of 429

    • Traction force between rotating roll and moving web considering the effect of air-entrainment and friction 

      Sasaki, M.; Tanimoto, K.; Kohno, K.; Takahashi, S.; Suzuki, S. (Oklahoma State University, 2003-06)
      High-speed transportation of paper web sometimes leads the web handling system into unstable state because of increase in the air-entrainment into the gap between a rotating roll and moving web or the nip region of winding system.

    • Traction in web handling: A review 

      Jones, D. P. (Oklahoma State University, 2001-06)
      In web processes, at least one moving machine component must drive the material through a friction force at the interface. This force, or traction, inevitably falls as speed increases, and is accompanied by a degree of ...

    • Transient 2D paper web drying model based on CFD 

      Lehtinen, Antti; Bergstrom, Fredrik; Immonen, Eero; Nurmi, Simo; Martinsson, Lars; Ingvarsson, David; Juppi, Kari (Oklahoma State University, 2009-06)
      In the present article, a model combining the benefits of the small scale and large scale approaches towards modeling paper drying in a paper machine dryer section environment is described. The model is transient and ...

    • Twenty major developments in seven years - Thinking outside the box at the Beloit Downingtown Research Lab 

      Pfeiffer, J. D.; Lucas, R. G. (Oklahoma State University, 2005-06)
      The Bi-Wind and the Rho-Meter hardness tester are two well-known achievements of the Beloit Corporation's Downingtown Research Lab and there were many more in the period 1964 to 1971. A small group of researchers, building ...

    • Two-dimensional behavior of a thin web on a roller 

      Brown, Jerry (Oklahoma State University, 2009-06)
      A web on a roller is usually modeled as a one-dimensional belt in a state of pure circumferential stress. However, most of the important problems in lateral web behavior involve shear stress and cross web stress. Furthermore, ...

    • Two-dimensional behavior of a thin web on a roller 

      Brown, J. (Oklahoma State University, 2011-06)
      This paper presents a continuation of work described at the 2009 IWEB conference in a paper titled, "Two-dimensional Behavior of a Thin Web on a Roller" [1]. In that paper (which will be referred to as Part I), linear ...

    • Two-dimensional model to predict web-to-roller traction at small wrap angles 

      Rice, B. S.; Gans, R. F. (Oklahoma State University, 2003-06)
      We have studied the traction developed between a thin, flexible web and a rotating circumferentially grooved cylindrical roller. The traction model developed by Rice and Gans [1] is inadequate for small wrap angles, because ...

    • Two-drum winder run simulation model 

      Jorkama, M.; Von Hertzen, R. (Oklahoma State University, 1997-06)
      A dynamic, analytical model for winder run simulations is presented. The model consists of elastic drums, deformable paper rolls and a rigid rider roll beam. A paper roll nip flexibility model is derived and a profound ...

    • Ultrasonic based multiple web sensing for lateral control application 

      Haque, Jami; Winter, Darcy; Ploetz, William (Oklahoma State University, 2009-06)
      As sensing requirements in guiding applications increase in complexity, innovation must increase to meets these needs. In applications with multiple webs, space restrictions often limit the placement of sensors. In this ...

    • Understanding friction 

      McDonald, J. D. (Oklahoma State University, 1999-06)
      Friction plays a critical role in many web handling and winding problems in the paper industry. Although these problems can often be reduced to simple mechanical models, the models require the coefficient of friction of ...

    • Unexpected wrinkling mechanism in thin webs 

      Jones, Dilwyn P. (Oklahoma State University, 2019-06)
      Wrinkles and creases are a particular problem in thin web materials, leading to functional and visual defects. Their precursor is the wavy pattern in spans between rollers. Troughs running along or close to the machine ...

    • Unified model for longitudinal and lateral web dynamics 

      Brown, Jerald L. (Oklahoma State University, 2019-06)
      In "The Effect of Mass Transfer on Multi-Span Lateral Dynamics of Uniform Webs" [1], it is shown that behavior of Shelton's lateral dynamic beam model [2] can be explained as the interaction of the normal entry equation ...

    • Unwind and rewind guiding 

      Hopcus, K. I. (Oklahoma State University, 1993-06)
      Lateral control of a web through a process line involves the use of web guides and control systems at different points in the process. There are three general areas for guiding. Guides are typically located at the terminal ...

    • Updated model for lateral displacement of nonuniform webs 

      Olsen, Jan Erik (Oklahoma State University, 2009-06)
      The theory for lateral mechanics of nonuniform webs in the open literature is believed to be flawed and an updated theory is presented. The theory is based on beam theory and a set of boundary conditions. The so-called ...

    • Use of conservation of mass in modeling lateral behavior in moving webs 

      Brown, J. (Oklahoma State University, 2011-06)
      Though conservation of mass has played a prominent role in modeling longitudinal tension, it has seen limited use in modeling problems where lateral behavior is important. This may be due to the fact that most lateral ...

    • Using a two dimensional winding model to predict wound roll stresses that occur due to circumferential steps in core diameter or to cross-web caliper variation 

      Kedl, D. M. (Oklahoma State University, 1991-05)
      This paper describes a model for estimating the stresses throughout a wound roll as a function of both radius and width. Width direction stresses are influenced by non-uniform winding tensions created through stacking ...

    • Using a winding model to reduce winding defects 

      Thuer, Amy (Oklahoma State University, 2017-06)
      As a roll is wound, stresses in the roll develop - and change as the roll builds. The stresses on each layer in the wound roll influence whether the roll is likely to telescope, star, cinch, yield, block or ooze - to name ...

    • Using finite element model to define how wrinkles form in a single web span without moment transfer 

      Gopal, H.; Kedl, D. M. (Oklahoma State University, 1991-05)
      This paper describes a finite element model that successfully predicts the formation of troughs and shear wrinkles in plastic webs for a single span bounded by two idler rollers. For this model, wrinkles are created when ...

    • Using FSRs to measure radial pressure in wound rolls 

      Good, J. K.; Fikes, M. W. R. (Oklahoma State University, 1991-05)
      The Force Sensing Resistor (FSRTM)1 is a device which changes resistance in a predictable manner with the application of force on its surface.[1] The FSR has been used in a variety of applications since its invention in ...

    • Using roll hardness to screen for excessive web bagginess 

      Thuer, Amy (Oklahoma State University, 2013-06)
      Various methods are available for quantifying bagginess. But they can be tedious and impractical in a production setting. Often one just needs to know if a roll is too baggy to run without wrinkling during converting. ...