Browsing OSU - International Conference on Web Handling by Title
Now showing items 248-267 of 429
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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 ... -
New method for measurement of wound-in-tension in webs wound into rolls
(Oklahoma State University, 2007-06)The Wound-In-Tension (WIT) is the tension in the outermost layer of a winding roll. The Wound-In-Tension is an important parameter that controls the stresses inside the wound roll which in turn determines the quality of ... -
New model for the steady state deformation and friction of webs on rollers
(Oklahoma State University, 2017-06)A web moving through process machinery interacts with rollers through frictional forces, which may change its direction of motion and tension. By modelling the web as a beam, these forces can be calculated from its tension, ... -
New objective method for quantitative assessment of cut edge quality for paper and board
(Oklahoma State University, 2001-06)In the paper converting and finishing industry the cut edge quality is of particular importance to the manufacturing processes, e.g. the printing process. In this paper an objective method for the quantitative evaluation ... -
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 ... -
Nip impinged center-winding including a nonlinear beam model
(Oklahoma State University, 2017-06)Nip pressure is commonly applied in winding processes in order to maintain structural stability and prevent air entrainment at high speeds. In nip induced winding modeling nip and roll are assumed to be beams with ... -
Nip mechanics of nano-impression lithography in roll-to-roll process machines
(Oklahoma State University, 2017-06)Nano-Impression Lithography (NIL) has been demonstrated to produce nano features on webs that have value to society. Such demonstrations have largely been the result of NIL processes that involve the discrete stamping of ... -
Non-interacting tension control in a multi-span web transport system
(Oklahoma State University, 1995-06)A non-interacting tension control algorithm is proposed to reject the disturbance due to the interaction between neighboring processing sections. An 'auxiliary dynamic model' is derived. And an 'auxiliary controller' is ... -
Non-linear tension control in a winding process by using the contact roll
(Oklahoma State University, 1997-06)In a web winding process, the contact roll plays many important roles including air-entrainment control and WIT (Winound In Tension) regulation. The behavior of the contact roll significantly affects the winding tension ... -
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 ... -
Nonlinear model to calculate the stressed state of a center-wound roll
(Oklahoma State University, 1995-06)This work develops a model to calculate the stressed state of center-wound rolled webs, such as film, paper, or foil. The model is built on a lesser known linear model developed by Umanskii and accounts for the nonlinear ... -
Nonlinear orthotropic viscoelastic winding model
(Oklahoma State University, 1995-06)A realistic and adaptive viscoelastic model for prediction of transient wound roll stress distributions is presented. The web material is taken to be orthotropic with a nonlinear radial creep compliance dependent upon ... -
Observations on the vibrations of paper webs
(Oklahoma State University, 2001-06)Frequency clustering and edge vibration localization of thin, wide, high-speed translating webs are investigated using a linear, translating, tensioned Kirchhoff plate model with very small but finite bending stiffness to ... -
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 ... -
On the dynamics of web transfer in an open draw
(Oklahoma State University, 1993-06)A paper web running in an open draw of a high speed paper machine is subjected to various internal and external forces which stretch it and which can ultimately rupture it. The forces arise from speed differences between ... -
On the effect of width direction thickness variations in wound rolls
(Oklahoma State University, 1991-05)A first order model has been developed, which predicts the widthwise variability in wound roll diameter and stresses. This model has been verified experimentally on wound rolls of film and qualitative agreement between the ... -
On the governing equation for web tension with out-of-round rolls
(Oklahoma State University, 2013-06)In roll-to-roll (R2R) manufacturing the presence of non-ideal elements, such as out-of-round or eccentric rolls, induces periodical oscillations in the web tension signal. Model simulations based on ideal elements do not ... -
On the web tension dynamics in an open draw
(Oklahoma State University, 1995-06)Increasing productivity of paper machines, i.e. speeds, and requirements on decreasing basis weights of paper grades demand a deeper insight of the web tension behavior in the open draws. Runnability of a paper machine is ... -
On-line continuous measurement of rolls' coefficient of restitution
(Oklahoma State University, 1999-06)This paper reports on the development of a novel technique to measure on-line rolls' coefficient of restitution or "springiness". The ratio of speed of separation to speed of approach in an elastic collision is termed the ... -
On-line control of tension in web winding systems based on wound roll internal stress computation
(Oklahoma State University, 2001-06)One of the key challenges in the processing of flexible media such as plastic films is to obtain rolls without any aspect defect: if one considers that a "defect" (i.e. wrinkling or buckling) is due to the fact that the ...