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Century of web handling literature
(Oklahoma State University, 2011-06)
This paper is a review of some 3,500 published works in the areas of web handling, winding, converting and related subjects. These individual works include articles, books, columns, conference papers, instruction manuals, ...
Wrinkling of wide webs
(Oklahoma State University, 2011-06)
Wrinkling remains one of the top causes of converting process waste. Though wrinkles created by roller misalignment and web bending (shear wrinkles) are well-understood, nearly all the published research and modeling has ...
Explicit analysis of the lateral mechanics of webs transiting concave rollers
(Oklahoma State University, 2011-06)
All previous analyses of webs encountering spreading devices have required enforcement of assumed boundary conditions. An example is the normal entry boundary condition which has been employed in many web/roller analyses. ...
Use of conservation of mass in modeling lateral behavior in moving webs
(Oklahoma State University, 2011-06)
Though conservation of mass has played a prominent role in modeling longitudinal tension, it has seen limited use in modeling problems where lateral behavior is important. This may be due to the fact that most lateral ...
Explicit analysis of the lateral mechanics of web spans
(Oklahoma State University, 2011-06)
All previous analyses of webs being steered through process equipment have required enforcement of assumed boundary conditions. An example is the normal entry boundary condition which has been employed in many web/roller analyses.
Modeling and frequency response of web tension with a pendulum dancer, and comparison of load-cell and dancer based tension control systems
(Oklahoma State University, 2011-06)
In web processing lines, web tension is typically regulated using an outer loop that provides a trim to the velocity reference of the inner velocity loop. The feedback signal for the outer tension loop is either a position ...
Modeling and analysis of rotogravure printing presses
(Oklahoma State University, 2011-06)
Print registration is the method of overlapping successive printed patterns to form a complex multicolor pattern. Registration error is the misalignment in the overlapped patterns. This paper deals with modeling machine ...
Movement of layers and induced tension in the nip area between drum and paper layers
(Oklahoma State University, 2011-06)
During paper manufacture and processing production losses occur during winding of machine-wide paper rolls and finished rolls due to winding faults. During the winding process at least one drum (steel or rubber-covered) ...
Analysis of web wrinkling in accumulators
(Oklahoma State University, 2011-06)
Accumulators provide a large amount of web storage in a small space. They are used to allow start/stop events like an unwind splice or a transfer to a new roll on a winder. It is common to see a loss of productivity due ...
Web tension variations caused by temperature changes and slip on rollers
(Oklahoma State University, 2011-06)
Webs are frequently heated or cooled on rollers, where thermal expansion or contraction attempts to reduce or increase tension respectively. In the case of vacuum coating, the web first cools on the chilled drum, then is ...