On-machine supercalender apparatus
AssigneeValmet Corporation
InventorVeikko Leiviska
Life of this patent
Estimating the term…
Abstract
On-machine supercalender apparatus adapted to be located at the discharge end of a paper making machine of the type which includes hard and soft calender rolls forming soft calendering nips with each other. The calender rolls are arranged in at least three roll groups, each of the calender roll groups consisting of three calender rolls, namely a central hard calender roll and two outer soft calender rolls. The calender roll groups are separate from each other in that the calender rolls of one group are neither directly or indirectly in nip contact with the calender rolls of another group. At least a majority of the soft calender rolls are replaceable during operation of the apparatus without any significant interruption in operation.
Claims6
On-machine supercalender apparatus adapted to be located at the discharge end of a paper making machine and arranged so as to function as a supercalender, comprising:
- hard and soft calender rolls forming soft calendering nips with each other, said calender rolls being arranged in at least three roll groups, each of said calender roll groups consisting of three calender rolls including a central roll and two outer rolls;
- said calender roll groups being separate from each other such that the calender rolls of one group are neither directly nor indirectly in nip contact with the calender rolls of another group;
- and
- wherein the central roll of each calender roll is constituted by a hard calender roll and the two outer rolls are constituted by soft calender rolls which form a pair of soft calendering nips with the hard central roll, at least a majority of said soft calender rolls being replaceable during operation of the apparatus without any significant interruption in operation of the apparatus.
Dependencies are inferred from the claim text.