New Cross Profiling System for Hard and Soft NIP Calenders, 1995 Finishing and Converting Conference Proceedings

Dr. Peter Svenka

Eduard Küsters Maschinenfabrik

A newly developed controlled crown compensated roll gives the papermaker a tool for making both broad and narrow wave CD profile corrections without external devices. The design of this roll is based on the principle of well established zone controlled rolls, but allows control of each individual element. The size of the linear profile deviations is independent of the median nip force, with corrections applied as additions to or subtractions from the nip force at any desired location including the edges. The effect of the linear force settings on caliper corrections depends on the magnitude of the median nip force. At lower linear force level, a given amplitude of corrective force has greater effect than the same amplitude at higher median nip force. With increased sheet density higher linear force differentials are required for a given caliper reduction.

Author: Svenka, P., Minkenberg, R.
New Cross Profiling System for Hard and Soft NIP Calenders,
New Cross Profiling System for Hard and Soft NIP Calenders, 1995 Finishing and Converting Conference Proceedings
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