Advancing material of indeterminate length – Processes
Patent
1994-06-08
1995-11-28
Footland, Lenard A.
Advancing material of indeterminate length
Processes
242413, B65H 1600
Patent
active
054700051
ABSTRACT:
A method of sensing tension changes in a sheet of material in a processing line, the material having a mass flow balance in the processing line. The method includes using a dancer roll for engaging the sheet and an actuator for mechanically and momentarily introducing changes in the mass flow balance of the sheet. A sensor is provided for detecting sheet tension at a location near that at which the sheet engages the dancer roll and for producing signals indicative of sheet tension. An algorithm is provided for processing the signals in a manner that determines the dynamic relationship between tension variations near the location of the roll and at other locations in the processing line. The signal processing is effective to identify the presence of the magnification of variations in sheet tension so that the causes of such magnification can be identified.
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King Eugene O.
Teasley G. Alfred
Aluminum Company of America
Dunn Thomas E.
Footland Lenard A.
Strickland Elroy
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