Importance

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Abstract

A roll assembly for pressure-treatment and preferably also for heat-treatment, of a web-type medium comprises at least two rolls, having roll bodies (3) forming a nip for the medium transported between the two rolls, bowing of the rolls possibly being partially compensated mechanically, such as by interlacing the rolls relative to each other (skewing) or bending the rolls by means of each having two bearings per trunnion (roll-bending). The radial local stiffness of at least one of the roll bodies (3) is varied axially such that the profile of the local stiffness compensates a pre-existing nip error which was not eliminated by the mechanical compensation. A roll for pressure-treatment, and preferably also for heat-treatment, of a web-type medium comprising a roll body (3) having a center bore (4) is distinguished in that for compensating a nip error in a rolling procedure, the radial local stiffness of the roll body (3) is varied by a diameter (d) of the bore (4) differing in size axially or by support rings.

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First Claim