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Now showing items 421-429 of 429
Closed solid-state-fluid mechanical model for calculating the transferable torque on wrapped rolls
(Oklahoma State University, 1999-06)
Higher velocities of webs at the same or reduced web tension require basic improvement of the existing machine technique. Concerning the transferable torque between a web and a roll common work is restricted either to the ...
Web tension behavior in the presence of eccentric rollers: Modeling and validation
(Oklahoma State University, 2011-06)
Since rotating machinery is used to transport the web on rollers, it is common to observe periodic oscillations in measured signals such as web tension and web transport speed. These periodic oscillations are more prevalent ...
Machine direction laminate curl control
(Oklahoma State University, 1999-06)
Machine Direction Curl is a phenomenon that develops sometime after a finished laminate is allowed to relax. The root causes of this eventual curl are due primarily to the recovering of strain, in either or both Strips A ...
Measurement of web feed rates in rubber covered nip roller applications and the impact on wrinkle formation
(Oklahoma State University, 2011-06)
Nip rollers are used extensively in web handling processes; however, rubber-covered rollers have the unwanted and often unpredictable characteristic of unknown surface speed owing to coupling between circumferential and ...
Compensation of disturbances in the web force caused by a non-circular running winder
(Oklahoma State University, 1999-06)
In many plants of the steel-, paper-, printing-, plastic- or textile industry the first section is an unwinder. But during storage and transport of the rolls, the rolls are often non-circular. If such a roll is unwinded, ...
Tenacity, fracture mechanics and unknown coater web breaks
(Oklahoma State University, 1995-06)
A web break model, based on fracture mechanics, was used to investigate unknown coater web breaks. Runnability was defined as Lb , the length between breaks. The model includes the size distribution of defects (holes and ...
Lateral mechanics of baggy webs at low tensions
(Oklahoma State University, 2005-06)
Existing mathematical models describing lateral movement of webs such as paper or plastic film, assume that the entire width of the web is carrying tension or that the web is capable of supporting compressive stresses. For ...
Unexpected wrinkling mechanism in thin webs
(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 ...
Aerodynamic forces of a Coanda air jet
(Oklahoma State University, 2003-06)
This paper discusses the aerodynamic pressure and frictional force on a plate (called web) placed against a plane wall jet of air. The air jet was ejected from a slot nozzle, turned 90 degrees following a curved surface, ...