Web tension measuring method and device
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United States of America Patent
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Apr 7, 1987
Grant Date -
N/A
app pub date -
Jul 16, 1985
filing date -
Jul 18, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Web tension measurement in that the web (5) is caused to oscillate transversely with the resonance frequency for the portion of the web (5) defined by a support (2,2a). The oscillations are measured by detectors (6,7) for determining the web tension. The measuring is carried out free of contact in that a thin air layer is maintained between the support (2,2a) and web (5).
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