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Mechanics of grooved flexible spreader rolls
(Oklahoma State University, 2007-06)
All known web spreading hardware work based upon one of three principles. Sometimes it is unclear which principle(s) apply to a given spreading device. The flexible spreader roller is such a device. In this paper we will ...
Reading a roll
(Oklahoma State University, 1997-06)
Web or winder defects often leave a visible record of themselves in the wound roll that can be read much like the rings of a tree. Varying strains in each layer as it is wound will cause changes in geometry that can be ...
Two-drum winder run simulation model
(Oklahoma State University, 1997-06)
A dynamic, analytical model for winder run simulations is presented. The model consists of elastic drums, deformable paper rolls and a rigid rider roll beam. A paper roll nip flexibility model is derived and a profound ...
On-line tension profile optimization via moisture profile controls on the newsprint papermaking process
(Oklahoma State University, 2001-06)
This paper describes a novel multi-profile control, which can simultaneously optimize both moisture and elongation and/or tension profiles of newsprint grades. The controller can include tension profile measurement [1][2] ...
Aspects of two drum winding
(Oklahoma State University, 1997-06)
Two drum winding is not yet described by any model due to the lacking expression for the so-called wound-in-tension. Through dynamic analysis equations for winding velocity and first-drum-tension, which is related to ...
Simulation of wrinkling patterns in webs due to non-uniform transport conditions
(Oklahoma State University, 1993-06)
Lateral dynamics of non-uniform webs
(Oklahoma State University, 2009-06)
A new method of generating and testing cambered web has been developed. Experimental lateral static data is presented for twenty six different conditions and dynamic data is presented for five of these conditions. Numerous ...
New parameter for dynamic characterization of PET film surface topography
(Oklahoma State University, 1999-06)
It is well-known that handling and winding flexible media involve aerodynamic phenomena which are crucial for the process. Among those parameters which govern the final thickness value of the air layers separating the film ...
Analysis of web spreading induced by the curved axis roller
(Oklahoma State University, 1993-06)
This paper describes the development of a model for predicting the elastic deformations and stresses in a web crossing a curved-axis roller. The Finite Element Method was used to compute web displacements, forces and ...
Nonlinear finite element model for web spreading
(Oklahoma State University, 1997-06)
This study concerns the modification of a commercial finite element code (ABAQUS) to efficiently model webs moving over stationary, frictional guides. This modification will allow the user to refine the mesh in areas of ...