Methods and apparatus for prescribing web tracking in...

Details Methods and apparatus for prescribing web tracking in... Methods and apparatus for prescribing web tracking in...

2006-02-07

2006-02-07

Matecki, Kathy (Department: 3654)

Advancing material of indeterminate length

By fluid current

Floating web

C034S530000, C034S559000

Reexamination Certificate

active

06994239

ABSTRACT:
Methods and apparatus to reduce or eliminate misalignment, wrinkles, and creases in coated web product. A relationship between web outgassing pressure and surface roughness of the web and web transporting rollers is developed. This relationship allows for the control over the web outgassing pressure. The ability to adjust the web tension pressure, as well as the selection of web transporting rollers with prescribed surface characteristics, allows an operator to control the degree to which the web floats over or tracks the web transporting roller. A controller, in response to pressure and tension sensors, can also provide dynamic, closed-loop control of the entire system.

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Schwarz, W., “Thermo-Mechanical Behaviour of the Web during Coating,” LEYBOLD AG, Hanau, 13 pgs.
Wales et al., “Model For Thermal Creasing In Roll-To-Roll Vacuum Metallising,” Proceedings of the 2ndInternational Conference on Web Coating, Bakish Materials Corp., B.V.T. Ltd., Sep. 9-11, 1988, pp. 204-215.

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