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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 ...
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. ...
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 ...
Experimental study of winding zone dynamics
(Oklahoma State University, 1997-06)
The elastic nature of plastic films and the rotational inertia of rolls, spindles and drives cause a film handling line to exhibit the characteristics of a dynamic system. This dynamic response can be observed by measuring ...
Inexpensive multipoint roller speed measurement system
(Oklahoma State University, 1997-06)
Machines that manufacture photographic web products use rollers to convey the web. Product imperfections, like scratches and scuff marks, are caused by loss of traction between these rollers and the web. Loss of traction ...
Computations of air films and pressures between webs and rollers for steady and unsteady operating conditions
(Oklahoma State University, 1997-06)
Numerical computations have been performed to predict the lubricating air film thickness and pressure for the entire region of smooth rotating support rollers wrapped by moving impermeable and permeable webs. Results have ...
Irreversible reduction of foil tension due to aerodynamical effects
(Oklahoma State University, 1993-06)
Computation of the residual stress generated during the winding of a plastic film has been coped with by many authors. These studies are based on the assumption that the residual stresses mainly depend on two winding ...