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Now showing items 11-20 of 34
Web handling for flexible display manufacture
(Oklahoma State University, 2005-06)
Flexible displays manufactured in a continuous roll-to-roll fashion are the "Holy Grail" of the display industry. This paper offers an assessment of the development efforts related to web handling, which are required to ...
Control and online tension reference optimization in winding systems: Application to an identified three-motors simulator
(Oklahoma State University, 2005-06)
It is well known that the tension reference value, which a priori guarantees a good quality roll, is based on the stress generated within the roll. However, due to the imperfections of the winding systems and to the limited ...
On the durability of cores and rest roll dynamics
(Oklahoma State University, 2005-06)
The printing industry is facing the same challenges as many other industries, in that demand is increasing for its processes to run faster and more reliably. Roll weight, width and web speed are steadily increasing which ...
Mechanics of a thin web wrapped helically about a turn bar
(Oklahoma State University, 2005-06)
The mechanics of the interactions between a flexible web and an externally pressurized air cushion is modeled. The web is wrapped around the porous cylindrical turn-bar at an oblique angle (helically). The turn-bar supplies ...
Wrinkling of webs on rollers and drums
(Oklahoma State University, 2005-06)
Wrinkles are frequently observed in thin webs wrapping rollers, winding cores, and drums in vacuum coaters. They are the buckling response of the web to compressive deformation in the transverse direction (TD), which may ...
Wound roll generated unstable vibration on a two-drum winder
(Oklahoma State University, 2005-06)
Nip contact between the paper roll, winding drum and rider roll or some other nip roller may cause that the wound roll is deformed into a convex polygon. This deformation process is accompanied with a strong vibration. The ...
In-roll stress analysis considering air-entertainment at the roll-inlet with the effect of grooves on nip roll surface
(Oklahoma State University, 2005-06)
High-speed winding of paper web sometimes leads the winding system into unstable states, interlayer slippage of wound roll, paper breakage and so on, due to the excessive air-entrainment at the roll-inlet of nip contact ...
New method for analyzing the deformation and lateral translation of a moving web
(Oklahoma State University, 2005-06)
A new method is presented for modeling the elastic behavior of webs conveyed over rollers. In addition to producing detailed descriptions of stress fields, it provides a new way of looking at problems that will help web ...
Investigation of fluid mechanics of slotted air-jets for air reverser applications
(Oklahoma State University, 2005-06)
The fluid mechanics of the air flow, caused by a series of impinging air-jets, in a constant-height, rigid channel is investigated using computational fluid dynamics (CFD). The primary goal of this work is to investigate ...
Wrinkle-free conveyance in nips
(Oklahoma State University, 2005-06)
Wrinkling in nips with ultra-thin webs is empirically studied. In web converting, nips are used for tension isolation drives, gravure coaters, prevention of air entrainment on rollers and winding rolls, calendaring, ...