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Now showing items 1-10 of 31
Prevention of web floating at wrapped transport and guide rollers
(Oklahoma State University, 2003-06)
Increasing productivity of web converting machines requires constructive improvements for the prevention of web floating at transport and guide rollers. Existing solutions which carry off the air like vacuum or grooved ...
Issues in modeling slitting of magnetic tapes
(Oklahoma State University, 2003-06)
In order to quantify and understand the driving force for film layer fracture, delamination, and the cutting phenomena in general, an idealized two-dimensional "slitting" model was developed. The model includes two lower ...
Calculating coilset based on curvature of a web
(Oklahoma State University, 2003-06)
A web which has passed over a roll can exhibit coilset due to differential yielding of fibers through its thickness. Modeling can provide a radius of curvature, R, the web would achieve if no external forces were applied. ...
Vibration and stability of axially moving webs coupled to surrounding air
(Oklahoma State University, 2003-06)
High-speed web flutter is of significant importance in a variety of paper, plastics, textiles, and sheet metal industries. The natural frequencies of vibration and the onset of flutter in thin, wide, high-speed webs are ...
Simple model to predict web-to-roller traction
(Oklahoma State University, 2003-06)
We have studied the traction developed between a thin, flexible web and a rotating cylindrical roller. We present a new analytic model for high-wrap, circumferentially grooved rollers that couples air film pressure, web ...
Robust control design using H-infinity methods in large scale web handling systems
(Oklahoma State University, 2003-06)
This paper presents H-infinity control strategies for elastic web transport systems. The aim is to reduce the coupling between web tension and web transport velocity. First of all, a multivariable H., centralized controller ...
Characterization of a slit edge using image analysis
(Oklahoma State University, 2003-06)
The paper deals with the characterization of edge quality of a slit web. The conventional way of determining the edge quality of a slit web is usually through visual inspection, sometimes under an optical microscope. In ...
Two-dimensional model to predict web-to-roller traction at small wrap angles
(Oklahoma State University, 2003-06)
We have studied the traction developed between a thin, flexible web and a rotating circumferentially grooved cylindrical roller. The traction model developed by Rice and Gans [1] is inadequate for small wrap angles, because ...
Effect of air-side leakage in roll winding
(Oklahoma State University, 2003-06)
In web winding processes, a thin layer of air is entrained into rolls during winding. This air reduces the interlayer pressure in the wound roll because the air acts like a sponge between adjacent web layers. Winding models ...
Buckling of orthotropic webs in process machinery
(Oklahoma State University, 2003-06)
Many webs in web process machinery exhibit out-of-plane deformations, defined as troughs, in free web spans between rollers. In other cases when the troughs become severe the out-of-plane web deformations will begin to ...