Patent ID: 6848358
Filing Date: 2005-02-01
Classification: D21G

Abstract:
1. A calender for calendering a web of paper or board comprising a top variable-crown roll; a bottom variable-crown roll; at least one intermediate roll positioned between said top roll and said bottom roll, wherein said top roll, said bottom roll and said at least one intermediate roll are disposed in a vertical stack such that the rolls may be brought into nip contact with adjacent rolls to form a nip during calendering; bearing blocks in which said rolls are mounted; a frame; mounts to which said bearing blocks of said at least one intermediate roll are connected, wherein said mounts of said at least one intermediate roll are slidably connected to guides in said frame; and a plurality of actuator means, wherein each of said plural actuator means is positioned between at least one of said mounts and said bearing blocks of two adjacent rolls, wherein each of said actuator means is individually adapted to substantially relieve the specific linear loading of the nip between said adjacent rolls caused by the weight of the rolls, bearing blocks, mounts, and any other actuator means located above the actuator means in said vertical stack.