Adjustable ballast system for the holddown belt in a double...

Details Adjustable ballast system for the holddown belt in a double... Adjustable ballast system for the holddown belt in a double...

B - Operations, Transporting

31

F

B31F 1/20 (2006.01) B31F 1/28 (2006.01)

Patent

CA 2149451

A variable load ballast system for the double facer of a corrugator includes a number of rows of holddown belt engaging ballast members positioned in side-by-side relation transversely across the belt, with the rows extending over the full heating section of the double facer. Each of the rows is divided into a number of longitudinal segments, each of which segments is controlled by a vertical actuator to move the segment between a lower full load ballast position on the belt and an upper no load position off the belt. The rows may comprise a series of ballast rollers or a continuous flexible membrane and either embodiment provides the ability to vary the ballast load on the holddown belt longitudinally, laterally and in any pattern of symmetry or asymmetry to accommodate a wide range of operating conditions and problems typically arising in the operation of a double facer. Ballast system control based on monitored web moisture content is also disclosed.

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