| 摘要 |
A press roll for treating sheet material such as paper and suitable for use in the calender or press section of a paper machine. The roll includes a robust stationary shaft and a shell coaxially surrounding and spaced from the shaft and rotatable with respect thereto. In the gap between the shaft and shell is a sealing structure which surrounds a pressure zone in this gap to seal off this pressure zone, fluid under pressure being supplied to the zone by way of a duct which extends through the shaft, so that the fluid pressure in the pressure zone can be controlled to control deflection of the roll at its shell.
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