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