Calender and process for operating a calendar

Presses – Methods

Reexamination Certificate

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C100S041000, C100S15800R, C100S159000, C100S161000, C100S168000, C264S040100, C264S175000

Reexamination Certificate

active

06857356

ABSTRACT:
Calender including a roll stack having a plurality of rolls that rest against one another in a press direction. At least one of the rolls has an elastic surface. A vibration recording device determines in an uninterrupted manner a vibration of at least one of the rolls. A mechanism displaces the at least one roll crosswise to the press direction based on the vibration. The process includes determining in an uninterrupted manner a vibration of at least one of the rolls and displacing the at least one roll crosswise to the press direction based on the vibration.

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(1) Article by J. R. Parker et al. “Analysis and Control of Calender Barring” Pulp & Paper Canada, vol. 76, No. 10, Oct. 1975, pp. 89-91.
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Document “Calender Vibration—A Simulation Study and a Cure,” Tappi Journal, vol. 52, No. 7, Jul. 1969, pp. 1356 through 1361.
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“Calender barring on paper machines-practical conclusions and recommendations,” Tappi Journal, vol. 58, No. 8, Aug. 1975, pp. 147-151.

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