Showing papers on "Web modeling published in 1987"
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20 Feb 1987
TL;DR: In this article, a system for processing a virgin web to yield printed documents such as business forms comprises a printing device adapted for printing non-repetitive (variable) and repetitive (constant) information and data as determined by a computer, and processing devices disposed in relation to the transporting direction of the web.
Abstract: A system for processing a virgin web to yield printed documents such as business forms comprises a printing device adapted for printing non-repetitive (variable) and repetitive (constant) information and data as determined by a computer, and processing devices disposed--in relation to the transporting direction of the web--in front of and past the printing device and serving for shaping the web and possibly for printing onto the web in color. The processing devices are preferably built in the form of slide-in units adapted to be loosenably mounted into shelves of the system and to be driven for instance through separable connecting means by drive devices fixedly mounted on the frame. The system makes it possible to process the web within a small space and with small energy requirements, and to assemble and disassemble the processing devices with rapidity.
36 citations
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10 Jun 1987TL;DR: In this article, the authors proposed two unique web models to be formed: the first model assumes that the web line tension is large enough that bending of a web, due to a controller or roll misalignment, does not produce compressive stresses.
Abstract: In modelling web handling system as controlled dynamic system the model of the web selected can effect system behavior. Webs are membranes capable of resisting tensile stresses but incapable of resisting compressive stresses due to buckling or `wrinkling'. This allows at least two unique web models tobe formed. The first model assumes that the web line tension is large enough that bending of a web, due to a controller or roll misalignment, does not produce compressive stresses. Thus the web can be modeled as a beam in bending. The second model assumes that the web has wrinkled and now must be modeled as a series of ribbons between wrinkles. Results of an experimental investigation are presented to help determine which web model is valid such that an appropriate control strategy can be implemented.
5 citations