Browsing Proceedings of the International Conference on Web Handling by Author "International Conference on Web Handling (2001)"

Now showing items 1-20 of 35

    • Air entrainment on two sides of a web passing through the nip of two rigid rolls 

      Lee, J.-Y.; Shelton, J. J.; Chang, Y. B. (Oklahoma State University, 2001-06)
      When web materials (paper, plastic films, or metal foils) are wound into rolls, excessive amounts of air can be entrapped between layers of the web, resulting in defective rolls. Entrapped air layer between a coated film ...

    • BOPP film trends; Some technology implications 

      Howard, J. (Oklahoma State University, 2001-06)
      Biaxially oriented polypropylene (BOPP) is an extremely versatile film that has demonstrated enormous growth in commercial usage over the approximately 40 years since its first introduction. A combination of material, web ...

    • Considerations in the selection of a dancer or load cell based tension regulation strategy 

      Carlson, D. H. (Oklahoma State University, 2001-06)
      Two methods are predominantly used to control tension in web lines: a position regulated dancer roller strategy or a regulator based on tension feedback from a load cell. Dancers are most typically used on the unwind or ...

    • Deformation in shear slitting of polymeric webs 

      Lu, H.; Wang, B.; Iqbal, J. (Oklahoma State University, 2001-06)
      Shear slitting of a 25.4 μm thick polypropylene web was conducted on a laboratory slitter using a pair of rotary blades at a constant speed up to 5.08 m/s under controlled tension. The effect of web speed on the slit-edge ...

    • Design of contoured rollers for web spreading 

      Markum, R. E.; Good, J. K. (Oklahoma State University, 2001-06)
      Contraction of a web in the cross width direction while running over rollers can be traced to runability problems and wound roll defects. These defects may include troughing, baggy lanes, wrinkles and registration difficulties ...

    • Development of web tension in a winding nip 

      Jorkama, M.; von Hertzen, R. (Oklahoma State University, 2001-06)
      Today practically all winding devices apply a nip to the wound roll. In this winding method, radial pressure is applied by a winding drum to the wound roll at the point where the web enters the roll. This reduces the air ...

    • Effects of air entrainment on vacuum drive roller traction 

      Dobbs, J. N. (Oklahoma State University, 2001-06)
      Vacuum assisted drive rollers are commonly used to provide additional traction in web tension control schemes. Single-sided web contact makes them a natural choice between a coating station and an oven where lower tensions ...

    • Empirical investigation of weave versus web-to-roller traction in floating loop dryers 

      Walton, R. L. (Oklahoma State University, 2001-06)

    • Experimental and numerical studies of the reelspool and the parent roll interaction under gravity forces 

      Innala, M.; Vanninen, R. (Oklahoma State University, 2001-06)
      In wide paper machines, gravity forces may cause excessive stresses to the paperlayers of the parent roll due to bending of the reel spool. Experimental and numerical studies of these effects will be described in this ...

    • 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 ...

    • 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 ...

    • Lateral control of a web using estimated velocity feedback 

      Pagilla, P. R.; Dwivedula, R. V.; Zhu, Y. L.; Mandal, S. S.; Hopcus, K.; Haque, J. (Oklahoma State University, 2001-06)
      The focus of this paper is on lateral control of a web using estimated motor velocity feedback. A reduced state velocity observer is designed to estimate the motor velocity based on the measured lateral position of the web ...

    • Lateral deflections of webs in air-flotation ovens 

      Moretti, P. M. (Oklahoma State University, 2001-06)
      A long web span supported by many, regularly spaced, alternating air-bars is studied. The focus is on the lateral forces on the web due to the interaction of lateral curvature with out-of-plane deflections. The effect of ...

    • Lateral mechanics of an imperfect web 

      Olsen, J. E. (Oklahoma State University, 2001-06)
      A model describing the lateral mechanics of an imperfect web has been derived which brings forward information on the much debated fourth boundary condition. The model is based upon a generalized beam theory. Calculations ...

    • Lateral response and control of a multi-span web system to dynamic changes to the web and conveyance hardware 

      Forrest, A. W., Jr. (Oklahoma State University, 2001-06)
      A multi-span model that predicts the lateral response of webs to changes in the upstream position of the web and any type of motion of the included rolls is presented. The model uses a beam approximation for the deflection ...

    • Linear image detector-based edge scan sensor 

      Haque, M. M.; Yates, J.; Schmidt, S.; Winter, D.; Hueppelsheuser, D.; Storie, G. (Oklahoma State University, 2001-06)
      It has always been problematic to accurately sense a nonwoven (spunbond) material edge by an analog photoelectric or ultrasonic means. A sensor based on analog photoelectric or ultrasonic detection determines the lateral ...

    • 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 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 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 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 ...