Web tension profiles as measured in a rewinder and in a printing press
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Date
1993-06Author
Hellentin, P.
Eriksson, L. G.
Johnson, P.
Kilmister, G. T. F.
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Show full item recordAbstract
The web tension profile has been measured with an equipment called the CTSensor (Cross Tension Sensor) during ordinary production-runs both in rewinders and in newspaper printing presses. The measuring roller was placed after the printing units. The cross-direction (CD) tension profile from a paper machine does not vary much from time to time during normal conditions. From the measurements in the rewinder it is seen that higher moisture content gives lower tension. In the printing press the tension profile is changed, which is caused by the dampening with the fountain solution. When one reel in the printing press is automatically changed in the flying paster, it is possible to record the changes in the tension profiles between the two rolls. Tension transients are sometimes found, but they are normally small, and should not alone cause web breaks. However, when web breaks occur it is often in connection with the flying paster. A control roller can be used to compensate the change in the bending moment, which reduces the risk for web breaks.
Citation
Hellentin, P., Eriksson, L. G., Johnson, P., & Kilmister, G. T. F. (1993, June). Web tension profiles as measured in a rewinder and in a printing press. Paper presented at the Second International Conference on Web Handling (IWEB), Stillwater, OK.