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Now showing items 61-70 of 150
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 ...
Sensors and signal processing: An optical edge sensor for transparent film applications
(Oklahoma State University, 1991-05)
Sensing the edge of transparent film webs has always been somewhat difficult. Optical sensors typically see through the low opacity webs while pneumatic, ultrasonic and other sensors have their own sets of unique problems.
Ground-effect theory and its application to air flotation devices
(Oklahoma State University, 1995-06)
The ground-effect theories, originally developed for air cushion vehicles (or ground-effect machines), are re-examined and compared with the air bar test results. The geometries of the tested air bars are different from ...
Cause and effects of tension in a draw-controlled web process line
(Oklahoma State University, 1991-05)
There is a common belief, supported by several technical papers and bulletins, that the tension in a web increases with velocity by the addition of the term mV^2 to the tension in a stationary web. This concept of a tension ...
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 ...
Contact mechanical approach to the winding nip
(Oklahoma State University, 1999-06)
A contact mechanical model for the winding nip, consisting of the wound roll, winding drum and the intervening sheet, is presented. The roll and drum are modeled as linear, orthotropic, homogeneous cylinders with a rigid ...
Determination of linear viscoelastic material properties of paper for web mechanics in printing presses
(Oklahoma State University, 1997-06)
Analysis of multispan web handling systems such as printing presses requires that viscoelasticity is considered. Guided by the plane and anisotropic nature of paper webs and the relatively small strain levels in a printing ...
Estimating modulus of elasticity, torque loss, and tension using an Extended Kalman Filter
(Oklahoma State University, 1999-06)
A set of sub-optimal Extended Kalman Filters (EKF's) are described. The filters are used to estimate web tension, modulus of elasticity, and loss torque for all sections in a small web processing line located at Rockwell ...
How core stiffness and Poisson ratio affect energy balance roll structure formulas
(Oklahoma State University, 1991-05)
The stiffness of the core determines how much support it will offer for the initial wraps of web material, and whether this support will be maintained as internal pressures are developed. An expression is developed for ...
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.