Method and apparatus for measuring the tension of a moving web
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United States of America Patent
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Nov 19, 2002
Grant Date -
N/A
app pub date -
Dec 29, 2000
filing date -
Jul 1, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and apparatus for measuring the tension of a moving web. In the invention, a measuring beam (2)is curved so that a web moving over or under the measuring beam (2) forms an air cushion (3) of the air it transports between the measuring beam (2) and the web (1). The web (1) causes a force effect transmitted by the air cushion on the measuring beam (2). The tension of the web (1) is measured by measuring the force caused by the web (1) and transmitted by the measuring beam (2).
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