Browsing OSU - International Conference on Web Handling by Author "International Conference on Web Handling (2013)"

Now showing items 1-20 of 31

    • Adaptive feedforward based control strategy for attenuation of periodic tension oscillations in roll-to-roll manufacturing 

      Branca, Carlo; Pagilla, Prabhakar R.; Reid, Karl N. (Oklahoma State University, 2013-06)
      Considering the aforementioned issues, an adaptive feedforward (AFF) algorithm that can work in parallel to an existing feedback control systems is developed for control of web tension and to attenuate periodic oscillations. ...

    • Application of dimensional analysis to roll-to-roll manufacturing systems 

      Raul, Pramod R.; Pagilla, Prabhakar R. (Oklahoma State University, 2013-06)
      In this paper, we investigate the application of dimensional analysis for R2R systems. First, dimensional form of governing equations for web tension and speed are transformed to non-dimensional form using dimensional ...

    • Behavior of a flexible web in contact with a roller 

      Jones, Dilwyn P. (Oklahoma State University, 2013-06)
      In the contact patch between a web and a roller, there may be regions of stick and microslip or full slip. Within the stick zone, the velocities of web and roller surface match, but in the microslip zone they differ by a ...

    • Behavior of webs transiting crowned rollers 

      Vaijapurkar, S.; Beisel, J. A.; Good, J. K. (Oklahoma State University, 2013-06)
      Crowned rollers are known to center running belts by observation. Crown can be an unintentional artifact of rollers whose surfaces are machined on lathes while supported at their ends. The bending stiffness of the rotating ...

    • Comparison of control strategies for roll-to-roll printing presses 

      Seshadri, Aravind; Pagilla, Prabhakar R. (Oklahoma State University, 2013-06)
      Flexible printed electronics is touted to be a significant part of the future of the roll-to-roll (R2R) printing industry. Electronic devices, such as RFID tags, low-cost displays and lighting devices, polymer solar cells, ...

    • Control design for longitudinal web dynamics: Benefits and drawbacks of robust control approaches 

      Knittel, Dominique; Frechard, Jonathan; Martz, Yannick (Oklahoma State University, 2013-06)
      Web tension and speed are two key variables to be monitored and controlled in order to achieve the expected final product quality. One of the main objectives in web handling plants is to reach an expected web speed while ...

    • Control of registration accuracy of R2R gravure for fabricating inexpensive electronic devices 

      Lee, Wookyu; Koo, Hyunmo; Yeom, Dong Sun; Oh, Jung-who; Cho, Gyoujin (Oklahoma State University, 2013-06)
      The errors of the overlay printing registration in roll-to-roll (R2R) gravure are generated from many sources such as uneven web tension, thermal expansion and contraction of plastic web, uneven impression roll pressure, ...

    • Effect of winder type and web material properties on wound-on-tension 

      Ren, Y.; Kandadai, B.; Good, J. K. (Oklahoma State University, 2013-06)
      The choice of winder type for various web materials has long been a qualitative discussion. Web materials are vast and hence the range of web material properties is also vast. Valid but conflicting opinions for an optimal ...

    • Effects of parameter uncertainties on longitudinal web dynamics 

      Frechard, Jonathan; Knittel, Dominique; Martz, Yannick (Oklahoma State University, 2013-06)
      Web handling systems are very common in industry for metal, paper, textile and polymer material treatments. The key variables to monitor and control are the web speed and web tension in each span. The objective is to reach ...

    • Evaluating the impact of non-uniform paper properties on web lateral instability on printing presses 

      Parent, Frederic; Hamel, Jean (Oklahoma State University, 2013-06)
      Lateral instability of the paper web during printing may lead to several quality issues such as print misregistration, wrinkles, tracking issues, etc. The problem often leads to paper rejects and claims from printers. There ...

    • Fully R2R gravure printed smart tags and related web handling challenges 

      Cho, Gyoujin (Oklahoma State University, 2013-06)
      Although a smart tag which can communicate with a smart phone via NFC (Near Field Communication) has been considered as a core tool for bringing up the ubiquitous society, the difficulties in integrating 13.56 MHz RFID ...

    • Gauge optimization of the reference tension and nip-load in winding systems using wound internal stresses calculation 

      Knittel, Dominique; Bencheikh, Issam; Boutaous, M'hamed; Bourgin, Patrick (Oklahoma State University, 2013-06)
      In the winding process, the quality of the roll is directly related to its stress state. The winding tension and nip-load are the most significant parameters which play an important role in the stresses generated within a ...

    • General model of lateral web dynamics between two reels 

      Muftu, Sinan; Yang, Hankang (Oklahoma State University, 2013-06)
      A flexible web unavoidably deviates from its prescribed (linear) path during processing. The lateral web dynamics can be caused by tilt of rollers, web defects, off axis motion of the reels and other factors. In this work ...

    • Guidelines for allowable in-plane roller misalignment using wrinkling and web break models 

      Roisum, D. R. (Oklahoma State University, 2013-06)
      While we have had wrinkling and web break models for a quarter century and the means for precision roller alignment for a half century, no consistent recommendations have been made as to allowable tolerances for roller ...

    • Influence of heating on tensile and relaxation behavior of wet paper 

      Kouko, Jarmo; Retulainen, Elias; Kekko, Pasi (Oklahoma State University, 2013-06)
      The influence of increasing temperature on the strength and relaxation of wet never-dried paper was studied using C-IMPACT, a tensile tester equipped with a special heating chamber. The heating device formed a small climate ...

    • Lateral dynamics simulation of webs having cross-machine direction variation 

      Lange, Stephen; Looney, Michael; Carrle, Jeremy (Oklahoma State University, 2013-06)
      Webs often include sectional variation in caliper or modulus of elasticity as a result of undesirable manufacturing variation or by intentional design. These variations influence wrinkle formation and tracking control in ...

    • Longitudinal slip in rolling contact 

      Fugmann, Uta; Beier, Wolfgang (Oklahoma State University, 2013-06)
      In printing machines incorporating indirect printing technology, the image or pattern is first printed onto a blanket cylinder having an elastic rubber surface. Subsequently, the pattern is transferred to the substrate. ...

    • Machine and transverse direction errors in webs: Diagnosis and remedies 

      Walker, Timothy J. (Oklahoma State University, 2013-06)
      The primary focus of web handling is often on tension control; however, equally important to almost any web handling or winding process is to maintain machine (MD) and transverse direction (TD) control of the web. This ...

    • 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 ...

    • Modeling of nip pressures and web feed rates in rubber covered nip rollers 

      Cole, Kevin (Oklahoma State University, 2013-06)
      Nip rollers are used extensively in converting processes; however, correct design and usage of these types of rollers requires a sound understanding of the mechanics of the nip in both the machine and cross-width directions. ...