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Experimental study of idler roll slippage
(Oklahoma State University, 1999-06)
Idler roll slippage occurs when the roll surface velocity no longer equals the velocity of the web that transports the roll. In a web transport system, slippage will produce scratches in sensitive, coated web or cause ...
Compressive modulus measurement techniques
(Oklahoma State University, 1999-06)
The compression testing of stacks of sheet materials is done to learn the behavior of the group of sheets, a behavior that is quite different from that of a solid, or even one single thick sheet of the same material. Many ...
Control of longitudinal tension in multi-span web transport systems during start up
(Oklahoma State University, 1993-06)
The control of longitudinal tension in a multi-span web transport system during start up is studied using first-principles modeling and digital simulation. Since start-up problems normally involve large variations of system ...
Explicit simulations of web transport through process machines using periodic media analysis technique
(Oklahoma State University, 2015-06)
In this paper, the periodic media analysis (PMA) technique in Abaqus/Explicit [1] has been applied to simulate multiple cases of web transport through process machines. The Abaqus models for web transport developed in the ...
Wound roll stresses from displacement measurements
(Oklahoma State University, 1991-05)
Previous wound roll models required a known Wound-In-Stress boundary condition that is easily obtainable only for the restrictive case of pure center winding with measured incoming web tension and caliper. A new boundary ...
Mechanics of a cylindrical flexible web floating over an air-reverser
(Oklahoma State University, 1999-06)
The mechanics of the fluid/structure interaction between a thin flexible web, wrapped around a cylindrical drum (reverser), and the air cushion formed by external pressurization through the holes of this drum is analyzed. ...
Longitudinal slip in rolling contact
(Oklahoma State University, 2013-06)
In printing machines incorporating indirect printing technology, the image or pattern is first printed onto a blanket cylinder having an elastic rubber surface. Subsequently, the pattern is transferred to the substrate. ...
Systematic method for determining the controller gains in a multi-span web line
(Oklahoma State University, 2019-06)
A web line may have multiple locations where feedback systems are used to control web and roller speeds, and web tension. The Euclid Web Line (EWL) in the Web Handling Research Center at Oklahoma State University is such ...
Experimental and theoretical study of web traction over a nonvented roller
(Oklahoma State University, 1999-06)
The traction developed between a thin flexible web, wrapped around a nonvented, rotating cylindrical roller is studied experimentally and theoretically. A series of eight webs representing a wide range of surface roughness ...
Dimensional stability of substrates for printed electronics
(Oklahoma State University, 2015-06)
Substrates for flexible displays must retain registration between multiple process steps. Although polyester substrates offer cost and handling advantages, their dimensions are affected by tension, temperature and humidity. ...