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  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Taxonomy of web and winding defects 

    Roisum, David R. (Oklahoma State University, 2019-06)
    Constructing taxonomies can be useful for the researcher and troubleshooter alike. First, it gives us a precise language for conversation within our own plant or with our customers. This language helps us avoid using the ...
  • 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 ...
  • 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 ...
  • Photonic curing for enhancing the performance of roll-to-roll printed electronic devices 

    Maskey, Bijendra Bishow; Koirala, Gyan Raj; Kim, Yushin; Park, Hyejin; Yadav, Pravesh; Park, Jinhwa; Sun, Junfeng; Cho, Gyoujin (Oklahoma State University, 2019-06)
    The advent in printing technology promotes the possibility of roll-to-roll manufacturing process for low-cost, high throughput, and large area printing of the electronic devices in flexible substrate materials. However, ...
  • 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 ...
  • 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 ...
  • 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.
  • Roll-to-roll gravure printed smart food package to replace the "use-by" date system of foods 

    Maskey, Bijendra Bishow; Koirala, Gyan Raj; Kim, Seongryeong; Sun, Junfeng; Shrestha, Kiran; Kim, Yushin; Park, Hyejin; Cho, Gyoujin (Oklahoma State University, 2019-06)
    The implementation of internet of things (IoT) to the food industry offers a great deal, accompanying each functional unit from production to the consumption to ensure the quality of a particular food item. Among several ...
  • 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 ...
  • 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 ...
  • Web length creep in wound rolls 

    Mollamahmutoglu, C.; Gajjalla, A.; Markum, Ron E.; Azoug, Aurelie; Good, J. K. (Oklahoma State University, 2019-06)
    For convenience, webs are stored in wound rolls. The available web length in a wound roll is one mark of roll quality and a concern for many who process and convert webs. Elastic winding models have proven very precise at ...
  • 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 ...
  • Assessing wound roll quality using a measured stiffness/model method 

    Markum, Ron E.; Good, J. K. (Oklahoma State University, 2019-06)
    For those concerned with roll quality it is difficult to suppress the urge to compress the outer surface of a wound roll with your thumb to sense how tightly the roll was wound and how large the internal pressures might ...
  • 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 ...
  • 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 ...
  • 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 ...

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