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Analysis of trough formation and lateral steering of a web due to a tapered downstream roller
(Oklahoma State University, 2005-06)
Cylindrical rollers are never perfectly cylindrical. A common defect of a cylindrical roller is radial taper. A roller with a radial taper will induce a lateral shear force into the web. This shear force will cause a ...
Modeling rubber covered nip rollers in web lines
(Oklahoma State University, 2001-06)
Rubber covered nip rollers have a number of applications within web lines. Rubber covered rollers are often used to nip the web against a metal surfaced roller that is driven to achieve a certain web velocity or web tension. ...
Pseudo 3D viscoelastic winding model
(Oklahoma State University, 2007-06)
A pseudo 3D winding model that has considered orthotropic viscoelastic effects during winding and storage has been developed and implemented in a code revised from the 2D viscoelastic winding code developed by Qualls and ...
Tension allocation in three dimensional wound roll
(Oklahoma State University, 2005-06)
Much consideration has been given to the relationship between web line tension and the stresses they induce in three dimensional wound rolls. Three dimensional wound rolls are distinctive because their radial and circumferential ...
Large deformation winding models
(Oklahoma State University, 2009-06)
Almost all winding models incorporate the assumption of small linear deformations and strain in development. As such these models treat the addition of a layer of web to a winding roll with linear analysis using linear ...
Modeling nip induced tension in wound rolls
(Oklahoma State University, 2001-06)
Web materials are wound into coils by a variety of winders. Some winders center wind only. In this type of winding torque is provided to a core and web winds up on the core. Other types of winders have a roller, often ...
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 ...
Axisymmetric wound roll models
(Oklahoma State University, 2009-06)
Axisymmetric wound roll models provide the greatest definition of wound roll internal stresses to date. Simple one dimensional models can provide the user with radial profiles of pressure and circumferential stress as a ...
Design of contoured rollers for web spreading
(Oklahoma State University, 2001-06)
Contraction of a web in the cross width direction while running over rollers can be traced to runability problems and wound roll defects. These defects may include troughing, baggy lanes, wrinkles and registration difficulties ...
Measurement of nip induced tension and contact stresses
(Oklahoma State University, 2009-06)
Wound-on-Tension (WOT) is the tension in the outermost layer of a winding roll that is created due to the incoming web tension and the tension induced by the nip roller called Nip-Induced-Tension (NIT). Kandadai and Good ...