Method and apparatus for measurement of web tension

Details Method and apparatus for measurement of web tension Method and apparatus for measurement of web tension

1989-07-10

1991-10-01

Woodiel, Donald O.

Measuring and testing

Dynamometers

Responsive to force

73 377, G01L 508

Patent

active

050522337

ABSTRACT:
In a method and apparatus for measuring web tension, the tension of a moving web is measured by locating close to the web (14) a gauging bar (1), which has its outer surface curved in the machine direction of the web (14) and carries pressure measurement sensors (2) in holes (3) formed into the bar. An air-cushion is formed between the moving web (14) and the curved surface, wherein the pressure is proportional to the tension of the web (14). The tension of the web (14) is measured in an indirect way by gauging the air-cushion pressure. The apparatus capable of implementing the method has an apparatus (7) required for the generation of a reference pressure, and the pressure measurement apparatus is used for measuring the pressure difference between said reference pressure and the air-cushion pressure.

REFERENCES:
patent: 2755032 (1956-07-01), Justus
patent: 3057574 (1962-10-01), Justus

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