Browsing OSU - International Conference on Web Handling by Title

Now showing items 71-90 of 429

    • Control of the web lateral position and slope by employing spatially dependent transfer functions 

      Cobos Torres, Edison O.; Pagilla, Prabhakar R. (Oklahoma State University, 2019-06)
      In this work, we employ a non-dimensional state space representation of the spatially dependent lateral transfer functions to study web lateral position behavior in response to lateral displacement and rotation of the guide ...

    • Controller gain scheduling in a multi-span web line 

      Reish, Benjamin D.; Reid, Karl N. (Oklahoma State University, 2019-06)
      Gain scheduling is a common method of variable gain feedback control used to account for changes in the diameters of an unwind roll and a rewind roll during the operation of a web line. This paper focuses on three methods ...

    • Controlling static on an unwinding roll 

      Robinson, K. (Oklahoma State University, 2011-06)
      Excessive static charges on insulating webs are the root cause for a number of problems in roll-to-roll manufacturing operations. Static charges attract contaminants and cause discharges that can ignite flammable vapors, ...

    • Coupling between out-of-plane displacement and lateral stability of webs in air-support ovens 

      Moretti, P. M.; Chang, Y. B. (Oklahoma State University, 1995-06)
      In drying ovens where the web zig-zags over and under air-support bars, the web sometimes drifts to one side or the other until it runs into the oven wall. This divergence is shown to be coupled to out-of-plane displacements ...

    • Coupling of winding models and roll quality instruments 

      Mollamahmutoglu, C.; Bulut, O.; Adari, S.; Good, J. K. (Oklahoma State University, 2015-06)
      Winding models have been under development for roughly 50 years. These models have become mature in their ability to predict the internal residual stresses within a wound roll as a function of winder type, winder operating ...

    • Deflection and critical velocity of rollers 

      Shelton, J. J. (Oklahoma State University, 1995-06)
      A coordinate system with its origin at the center of the roller, and with the origin moving as the roller deflects, is used for solution of the fourth order differential equation of beam mechanics. The result is a continuous ...

    • 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 ...

    • Deformation of highly compressed wound rolls 

      Benson, R. C.; LaFleche, J. E.; Stack, K. D. (Oklahoma State University, 1995-06)
      This study concerns the loss of lap tension and interlayer pressure in a wound roll due to the compression of the web. Compression of the web thickness also affects the amount of material that may be wound into a roll of ...

    • 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 ...

    • Design of fixed structure controllers for web tension control 

      Pagilla, P. R.; Cimino, M.; Knittel, D. (Oklahoma State University, 2007-06)
      It is a common practice in industry to design a Proportional-Integral (PI) velocity feedback controller cascaded with a PI outer tension loop to regulate web velocity and tension to their desired values. The controller ...

    • Design of tension control systems to minimize interaction and disturbance propagation in web process lines 

      Raul, Pramod R.; Pagilla, Prabhakar R. (Oklahoma State University, 2015-06)
      In roll-to-roll systems (R2R), a local controller is designed for each section or tension zone based on measurement of web tension and speed from that section; this is typically referred to as decentralized control. This ...

    • Detection and characterization of web vibrations by artificial vision 

      Doignon, C.; Knittel D. (Oklahoma State University, 2003-06)
      In this paper, we address the problem of the detection of transverse web vibrations by means of a digital camera and a laser dots pattern device. For this purpose, we briefly present some video processings which yield an ...

    • Determination of linear viscoelastic material properties of paper for web mechanics in printing presses 

      Lif, J. O.; Ostlund, S.; Fellers, C. (Oklahoma State University, 1997-06)
      Analysis of multispan web handling systems such as printing presses requires that viscoelasticity is considered. Guided by the plane and anisotropic nature of paper webs and the relatively small strain levels in a printing ...

    • Determination of wound roll structure using acoustic time of flight measurement 

      Swanson, R. P. (Oklahoma State University, 1991-05)
      Roll structure measurement is presently done with destructive and intrusive measuring devices, such as FSR's or with specially instrumented winders. These methods are generally limited to research and development applications. ...

    • Determining the amount of sheets in a stack of paper by using a pressure stamp 

      Desch, M.; Dorsam, E. (Oklahoma State University, 2011-06)
      The paper will investigate the quality of an easy measuring procedure for determining the amount of sheets in a stack of paper.

    • Development of intelligent plastic film winder "Windstar" 

      Hashimoto, Hiromu; Tominaga, Yasumasa; Morikawa, Ryo (Oklahoma State University, 2015-06)
      Flexible continuous plastic films are used to produce various products, including optical films and packaging materials, because plastic film is suited to use in mass production manufacturing processes. Generally, the web ...

    • 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 ...

    • Differentially driven S-wrap rolls for improved tension isolation 

      Forrest, A. W., Jr.; Bennett, A. N.; Jones, M. R. (Oklahoma State University, 1997-06)
      Achieving adequate tension isolation is necessary in both the manufacture and subsequent processing of webs of all types. Several techniques currently are available including nips, vacuum rolls, driven rolls and S-wraps. ...

    • Dimensional stability of substrates for printed electronics 

      Jones, Dilwyn P. (Oklahoma State University, 2015-06)
      Substrates for flexible displays must retain registration between multiple process steps. Although polyester substrates offer cost and handling advantages, their dimensions are affected by tension, temperature and humidity. ...

    • Disturbances during reel change in paper machines 

      Eriksson, L. (Oklahoma State University, 1997-06)
      Paper machines operate continuously. When a machine reel is full, the paper web is transferred to an empty spool. The disturbances in the web which occur during the reel change period are wound-in and later released when ...