Now showing items 21-40 of 66023

    • Wound roll structures and practical applications 

      Michal, Neal J. (Oklahoma State University, 2019-06)
      Winding is an integral process in the manufacturing and converting of nearly all web materials such as paper, film, tissue, nonwovens, aluminum and steel. Wound rolls are the most convenient, economical, and most prevalent ...
    • Parametric study of nip load control on a pope reel 

      Bettendorf, Robert (Oklahoma State University, 2019-06)
      The secondary arms on a conventional pope reel control the nip load between the winding parent roll and the reel drum. As the parent roll grows, the secondary arms pivot away from the reel drum changing the angle of contact ...
    • Tension disturbances in a turret winder 

      Klassen, Clarence (Oklahoma State University, 2019-06)
      Turret winders are designed to produce batches of rolls from a continuously moving web. Typically, two spindles are mounted on a turret, 180 degrees apart. The winding roll remains in the inside (winding) position until ...
    • Exploring the strain transport formula 

      Lynch, Ron (Oklahoma State University, 2019-06)
      The strain transport formula relates the velocity of a moving web to its strain. It is based on the conservation of mass which, when applied to webs, becomes the conservation of relaxed length. Simply stated it says, the ...
    • Real time data analytics as applied to web-to-roller traction in manufacturing 

      Cole, Kevin A.; Hopkins, R. W.; Hotto, N. A.; Scheible, J. J.; Schneider, Brooks J.; White, Thomas J. (Oklahoma State University, 2019-06)
      Avoidance of web handling-related imperfections is often a challenge. As an example, the limit of web-to-roller traction is typically not detected until it is exceeded, resulting in product damage. Detection is often made ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Connection between longitudinal and lateral web dynamics 

      Brown, Jerald L. (Oklahoma State University, 2019-06)
      Where does the entry angle come from? This paper will show that the answer to this question reveals a connection between longitudinal and lateral behavior that has gone largely unnoticed.
    • Regional biaxial mechanical data of the mitral and tricuspid valve anterior leaflets 

      Laurence, Devin; Ross, Colton; Jett, Samuel; Johns, Cortland; Echols, Allyson; Baumwart, Ryan; Towner, Rheal; Liao, Jun; Bajona, Pietro; Wu, Yi; Lee, Chung-Hao (2019-06)
      The collective data associated with this article presents the biaxial mechanical behavior for six smaller, delimited regions of the mitral valve and tricuspid valve anterior leaflets. Each data set consists of five columns ...
    • 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 ...
    • Evaluation of physical properties of thin film and measurement of unsteady thermal stress 

      Nishida, Takeshi; Sunami, Yuta; Hashimoto, Hiromu (Oklahoma State University, 2019-06)
      Winding defect such as the roll wrinkles or slips to lose the value of the product. Winding defect is caused by the internal stress condition in the roll and the temperature change of the roll after winding. Therefore, it ...
    • Roll variability analysis for non-statisticians 

      Thuer, Amy; Dennison, Avery (Oklahoma State University, 2019-06)
      Roll variability can be characterized by several different methods. Off line cross-direction (CD) scans of thickness or coat weight give a snapshot of CD variation over a small machine-direction (MD) range. Roll hardness ...
    • Viscoelastic web curl due to storage in wound rolls 

      Pan, S.; Azoug, Aurelie; Good, J. K. (Oklahoma State University, 2019-06)
      While bending strains result from any web being wound at a radius of curvature into a roll, these bending strains are largest for the thicker homogeneous webs and laminates. Many webs are viscoelastic on some time scale ...
    • New governing equation for web tension by employing a Neo-Hookean material model 

      Gomez-Constante, A. R.; Pagilla, Prabhakar R.; Rajagopal, K. R. (Oklahoma State University, 2019-06)
      In this work, we derive a governing equation for web tension in a span by employing a Neo-Hookean material model that is applicable for transport of web materials under both small and large strains. This governing equation ...
    • Predicting the web length and layers in a wound roll 

      Gajjalla, A.; Markum, Ron E.; Good, J. K. (Oklahoma State University, 2019-06)
      The length of web in a wound roll is one mark of roll quality. The available web length in a roll is a concern for many who process webs and those who convert webs. There are algorithms that estimate the length of web and ...
    • 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 ...
    • Systematic method for determining the controller gains in a multi-span web line 

      Reish, Benjamin D.; Reid, Karl N. (Oklahoma State University, 2019-06)
      A web line may have multiple locations where feedback systems are used to control web and roller speeds, and web tension. The Euclid Web Line (EWL) in the Web Handling Research Center at Oklahoma State University is such ...
    • Removing the invisibility cloak: Using space design to influence patron behavior and increase service desk usage 

      Pierce, Stephaine; Schilling, Amanda (2019-05-21)
      In small branch libraries, patrons seeking assistance from library staff outside of the dedicated single-service desk often results in large staffing inefficiencies. This paper presents a case study in which the authors ...