Search
Now showing items 21-30 of 150
Using finite element model to define how wrinkles form in a single web span without moment transfer
(Oklahoma State University, 1991-05)
This paper describes a finite element model that successfully predicts the formation of troughs and shear wrinkles in plastic webs for a single span bounded by two idler rollers. For this model, wrinkles are created when ...
Fully nonlinear solution to the stresses inside wound rolls
(Oklahoma State University, 1999-06)
The Hakiel approach has been the accepted method for calculating stresses in wound rolls. It determines the stress in rolls by summing the stress induced by wraps of film applied to the roll surface. This approach is called ...
Linear edge sensor
(Oklahoma State University, 1999-06)
In modern industrial process controls, web guiding is becoming very demanding due to variations in web materials, variable web widths, and the need for better guiding accuracy. Selecting the appropriate sensor for various ...
Stick-slip behavior of paper during friction testing
(Oklahoma State University, 1995-06)
Paper often exhibits oscillatory stick-slip motion during friction testing using a horizontal sled apparatus. The motion consists of a constant-amplitude oscillation in the force required to move the sled, which may ...
Computer simulation of web dynamics
(Oklahoma State University, 1991-05)
Explicit finite difference schemes for modeling one-dimensional, transient web dynamics are designed, developed and tested. A sequence of numerical experiments are performed to ascertain the effects of various parameters ...
Improvement of web spacing characteristics by two types of guide rollers
(Oklahoma State University, 1999-06)
In the manufacturing fields of plastic sheet, paper, magnetic tape, thin metal plate, photographic film etc., the web transporting systems supported by guide rollers are often used. In such systems, it is of cardinal ...
Advanced surface design of polyester films and its application to magnetic recording media
(Oklahoma State University, 1997-06)
This paper briefly overviews the recent surface design for the purpose of achieving the good wind ability of polyester films and its application to the substrate films for the magnetic recording media.
Non-linear tension control in a winding process by using the contact roll
(Oklahoma State University, 1997-06)
In a web winding process, the contact roll plays many important roles including air-entrainment control and WIT (Winound In Tension) regulation. The behavior of the contact roll significantly affects the winding tension ...
Measurement and modeling of bearing drag in idler rollers
(Oklahoma State University, 1997-06)
Idler roller bearing drag plays a critical role when modeling web tension in a web line system. Lubrication, line speed, radial and axial loads on bearings can influence drag, which is directly reflected as a tension load ...
Web longitudinal dynamics
(Oklahoma State University, 1997-06)
Tension transients in a moving web can be described and predicted adequately from first principles. The resulting mathematical models are very useful for designing and debugging web conveyance machines and their controls. ...