Browsing Proceedings of the International Conference on Web Handling by Title

Now showing items 211-230 of 429

    • Mechanics of a thin web wrapped helically about a turn bar 

      Muftu, S. (Oklahoma State University, 2005-06)
      The mechanics of the interactions between a flexible web and an externally pressurized air cushion is modeled. The web is wrapped around the porous cylindrical turn-bar at an oblique angle (helically). The turn-bar supplies ...

    • Mechanics of cambered web belts on aligned rollers 

      Shi, Jinxin; Smith, J.; Markum, Ron E.; Good, J. K. (Oklahoma State University, 2019-06)
      The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. Webs can enter a cylindrical roller normally if the forces required to sustain normal entry and ...

    • Mechanics of grooved flexible spreader rolls 

      Good, J. K.; Markum, R. (Oklahoma State University, 2007-06)
      All known web spreading hardware work based upon one of three principles. Sometimes it is unclear which principle(s) apply to a given spreading device. The flexible spreader roller is such a device. In this paper we will ...

    • Mechanics of non-uniform webs 

      Swanson, R. P. (Oklahoma State University, 1999-06)
      This paper lays the groundwork in an effort to determine appropriate boundary conditions and basic principles that can be used to extend current web mechanics models to include webs that are not "initially straight and ...

    • Mechanics of web spreading 

      Roisum, David R. (Oklahoma State University, 1993-06)
      Web spreading systems are governed by a universal set of web handling principles such as bending, minimal energy path, normal entry, and traction. These laws, which apply for all web materials and spreading systems, can ...

    • Mechanistic survey of accumulating, resonant, and self-exciting systems in web handling 

      Roisum, David R. (Oklahoma State University, 2009-06)
      Certain problems in web handling can be challenging because they tend to get worse with time. Consider mechanical resonance. The longer you run at resonant vibration conditions, the worse the problem will initially get. ...

    • Mechatronic damping for contact rolls in film winders 

      Sieber, Bernd (Oklahoma State University, 2007-06)
      The winding of a web is one of the most extensive and error-prone processes in web handling. All known solutions are limited in the range of properties and production parameters. To broaden the mentioned limits, a new ...

    • Method for calculating catenary web spans 

      Dobbs, James N.; Carlson, Daniel H. (Oklahoma State University, 2013-06)
      The methods for calculating the catenary droop of a wire or cable hanging from fixed supports are well understood. For many common web materials, catenary droop or sag is not a consideration but for webs having a significant ...

    • Method for measuring wound-on-tension 

      Paanasalo, J. (Oklahoma State University, 2003-06)
      The Wound On Tension (WOT) is the web machine direction stress as it has just passed the winding nip into the roll. It is the most important quantity that determines the wound roll structure and its internal radial stress ...

    • Model for the prediction of wound roll dishing 

      Cole, K. A. (Oklahoma State University, 1997-06)
      Historically, wound-roll models have been used to predict stress levels which develop within winding and wound rolls. To gain maximum benefit from these models, stresses must be incorporated into defect or failure models. ...

    • Model-based control of lateral web behavior - An interconnection of two web guiding systems within packaging machinery 

      Philipp, Andre; You, Chang (Oklahoma State University, 2015-06)
      Within packaging industry mostly web materials are used to form bags or similar shaped packages. In order to professionally convert these materials and achieving increasing quality requirements of bags, detailed knowledge ...

    • Modeling and analysis of rotogravure printing presses 

      Seshadri, A.; Pagilla, P. R.; Lynch, J. E. (Oklahoma State University, 2011-06)
      Print registration is the method of overlapping successive printed patterns to form a complex multicolor pattern. Registration error is the misalignment in the overlapped patterns. This paper deals with modeling machine ...

    • Modeling and computer simulation of zero speed splice unwinds 

      Pagilla, Prabhakar R. (Oklahoma State University, 2017-06)
      A computer program for conducting model simulations for zero speed splice unwinds is described in this paper. A typical unwind system consisting of the unwinding material roll, festoon, dancer, and pull rolls is considered. ...

    • Modeling and control of web velocity and tension: An industry/university perspective on issues of importance 

      Carlson, Dan H.; Pagilla, P. R.; Weaver, Mark D. (Oklahoma State University, 2009-06)
      The goal of this paper is to provide an overview of current industrial practice in control of web velocity and tension and discuss some critical issues that require future research from the community which is pertinent to ...

    • Modeling and frequency response of web tension with a pendulum dancer, and comparison of load-cell and dancer based tension control systems 

      Raul, P. R.; Pagilla, P. R. (Oklahoma State University, 2011-06)
      In web processing lines, web tension is typically regulated using an outer loop that provides a trim to the velocity reference of the inner velocity loop. The feedback signal for the outer tension loop is either a position ...

    • 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 ...