Browsing Proceedings of the International Conference on Web Handling by Issue Date

Now showing items 21-40 of 429

    • Measurement and control of the tension distribution across the web in a newspaper printing press 

      Eriksson, L. G. (Oklahoma State University, 1991-05)
      A bending moment in a newsprint web caused by unevenly distributed tension across the web leads to disturbances in the production. Measurements in a printing press during newspaper production showed large variations in the ...

    • Flutter mechanism of sheet 

      Watanabe, Y.; Suzuki, S.; Sueoka, Y.; Kunimaru, H. (Oklahoma State University, 1991-05)
      Basic study has been conducted on sheet flutter which becomes an obstacle to the operation of printing machines and paper making machines in higher speed. Following three topics are presented in this paper.

    • Control of longitudinal tension in multi-span web transport systems during start up 

      Reid, Karl N.; Lin, Ku-Chin (Oklahoma State University, 1993-06)
      The control of longitudinal tension in a multi-span web transport system during start up is studied using first-principles modeling and digital simulation. Since start-up problems normally involve large variations of system ...

    • Irreversible reduction of foil tension due to aerodynamical effects 

      Bouquerel, F.; Bourgin, P. (Oklahoma State University, 1993-06)
      Computation of the residual stress generated during the winding of a plastic film has been coped with by many authors. These studies are based on the assumption that the residual stresses mainly depend on two winding ...

    • Web tension and wrinkles in the printing press 

      Linna, Hannu; Moilanen, Pertti; Parola, Markku (Oklahoma State University, 1993-06)
      In a modem paper mill the web handling in every process stage is optimized to fulfill productivity demands. The same kind of demands also exist in the printing plants. Smooth production without runnability disturbances is ...

    • On the dynamics of web transfer in an open draw 

      Pakarinen, Pekka; Ryymin, Risto; Kurki, Matti; Taskinen, Pekka (Oklahoma State University, 1993-06)
      A paper web running in an open draw of a high speed paper machine is subjected to various internal and external forces which stretch it and which can ultimately rupture it. The forces arise from speed differences between ...

    • Air films between a moving tensioned web and a stationary support cylinder 

      King, S. L.; Funk, B. A.; Chambers, F. W. (Oklahoma State University, 1993-06)
      Web quality and web processing efficiency depend upon maintaining a proper lubricating air film between the moving web and the driving and supporting rollers. As web line speeds are increased, the film can become too thick, ...

    • Advanced winding machine development at Sandia National Laboratories 

      Richardson, Charles B. (Oklahoma State University, 1993-06)
      Sandia National Labs, New Mexico is designing and testing an improved version of its state-of-the-art capacitor winding machine. The new CL1610 winding machine is based on the mechanical design of three previous Sandia ...

    • Web tension profiles as measured in a rewinder and in a printing press 

      Hellentin, P.; Eriksson, L. G.; Johnson, P.; Kilmister, G. T. F. (Oklahoma State University, 1993-06)
      The web tension profile has been measured with an equipment called the CTSensor (Cross Tension Sensor) during ordinary production-runs both in rewinders and in newspaper printing presses. The measuring roller was placed ...

    • Unwind and rewind guiding 

      Hopcus, K. I. (Oklahoma State University, 1993-06)
      Lateral control of a web through a process line involves the use of web guides and control systems at different points in the process. There are three general areas for guiding. Guides are typically located at the terminal ...

    • New decentralized control in processing machines with continuous moving webs 

      Wolfermann, W.; Schroeder, D. (Oklahoma State University, 1993-06)
      Web-products are manufactured in sections of rollers which transport the web according to specific technological demands. To achieve the required final product, the transport of the web has to be successful without material ...

    • Buckling of webs from lateral compressive forces 

      Shelton, J. J. (Oklahoma State University, 1993-06)
      Lateral compressive buckling of a web is often evident in troughs along a tensioned span and in corrugations in a wound roll or in the web wrapping a roller.

    • Mathematical and experimental investigation of the stack compression of films 

      Forrest, Albert W., Jr. (Oklahoma State University, 1993-06)
      An analytical model has been developed which predicts the stack stiffness of multiple layers of films with rough surfaces. Film surfaces are approximated by asperity distributions measured using commercially available ...

    • Changes in web tension profiles and paper properties during repeated rewinding 

      Eriksson, L. G.; Hellentin, P.; Johnson, P. (Oklahoma State University, 1993-06)
      Newsprint rolls with a diameter of about 125 cm have been run six times through a rewinder. The changes in the CD web tension profile have been recorded during the rewindings. The roll hardness has been measured before and ...

    • Instrumenting rolling nips for video recording and strain recording 

      Pfeiffer, J. D. (Oklahoma State University, 1993-06)
      An apparatus has been constructed to study the effect of a rolling nip on multiple layers of paper or other material. The use of a roller in contact with the surface of a winding product roll excludes air and produces ...

    • Measurement of web tension distribution by point source pulse excitation 

      Vickery, C. M.; Lowery, R. L. (Oklahoma State University, 1993-06)
      A web is a material that is produced as a continuous sheet and stored in wound roll form. Mechanics of web material handling in production, coating or conditioning, and winding operations affect web uniformity and the ...

    • Strip walk simulation for continuous processing lines 

      Uchida, Hiroyuki; Suzuki, Noriyuki; Kikuchi, Atsushi (Oklahoma State University, 1993-06)
      Although the prevention of lateral instability on continuous processing lines called "strip walk" is important in achieving high productivity and improving quality for steel industry, empirical systems have been applied ...

    • Effect of air entrainment in centerwound rolls 

      Good, J. K.; Holmberg, M. W. (Oklahoma State University, 1993-06)
      Internal stress models for centerwound rolls have existed for over thirty years but no model to date has accounted for air which is entrained due to the web velocity and the viscosity of air. This paper reports the results ...

    • Mechanics of web spreading 

      Roisum, David R. (Oklahoma State University, 1993-06)
      Web spreading systems are governed by a universal set of web handling principles such as bending, minimal energy path, normal entry, and traction. These laws, which apply for all web materials and spreading systems, can ...

    • Effects of PID gains for controller with dancer mechanism on web tension 

      Lin, P.; Lan, M. S. (Oklahoma State University, 1993-06)
      A dancer mechanism is widely used in connection with a tension controller in the tension control systems for web printing presses. The common tension controllers perform proportional, integral, and/or derivative (PID) ...