Search
Now showing items 331-340 of 429
Effects of web camber on handling
(Oklahoma State University, 1997-06)
The definition of camber and a laboratory method of measurement of camber are presented. Common problems caused by camber and methods for avoidance of these problems are discussed.
Winding of interleaved materials
(Oklahoma State University, 2005-06)
The manufacturing of flexible display products has very tight specifications on the dimensional changes between the coating stations or between different passes of a multi-pass coating process. Web stretching and stress ...
Importance of torque capacity in predicting crepe wrinkles and starring in wound rolls
(Oklahoma State University, 1995-06)
Roll models provide information about the radial stresses and circumferential stresses that exist in a wound roll of web material. A derived quantity that is available from the radial stress profile is the torque capacity. ...
Differentially driven S-wrap rolls for improved tension isolation
(Oklahoma State University, 1997-06)
Achieving adequate tension isolation is necessary in both the manufacture and subsequent processing of webs of all types. Several techniques currently are available including nips, vacuum rolls, driven rolls and S-wraps. ...
Boundary conditions for lateral deformation of webs transiting rollers in roll-to-roll process machines
(Oklahoma State University, 2017-06)
The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. The lateral registration of the web in successive R2R processes can determine whether a product ...
Modeling of edge rolls defects
(Oklahoma State University, 1999-06)
Based upon Hakiel's nonlinear orthotropic model for wound rolls, a model has been developed which takes into account widthwise variations in web properties. The model includes widthwise variations in the elastic modulus ...
Linear image detector-based edge scan sensor
(Oklahoma State University, 2001-06)
It has always been problematic to accurately sense a nonwoven (spunbond) material edge by an analog photoelectric or ultrasonic means. A sensor based on analog photoelectric or ultrasonic detection determines the lateral ...
On-line continuous measurement of rolls' coefficient of restitution
(Oklahoma State University, 1999-06)
This paper reports on the development of a novel technique to measure on-line rolls' coefficient of restitution or "springiness". The ratio of speed of separation to speed of approach in an elastic collision is termed the ...
Tension control in thin film production lines
(Oklahoma State University, 2005-06)
A comparison of speed and tension control in pull roll stand at film production lines is given. One typical error (periodic error) of standard gear box drives is analyzed and discussed. The design of a active tension control ...
Computing wound roll stresses based upon web surface characteristics
(Oklahoma State University, 1993-06)
Historically wound roll models have required the input of a radial modulus of elasticity. Heretofore this modulus has been measured using material testing systems which have shown the radial modulus to be dependent upon ...