Patent ID: 6494399
Filing Date: 2002-12-17
Classification: B65H

Abstract:
Apparatus for controlling a reeling process in a reel-up of a paper web comprising:a reel spool (2) supported at least at its ends, actuators for applying a load to the paper web running through a reeling nip onto a reel (R) having a growing size around the reel spool (2), means for determining measured variables of the reeling process and means for controlling the actuators on the basis of the determined measured variables, wherein the means for determining the measured variables comprise measuring sensors and a calculating unit (8) coupled to the sensors, said calculating unit being structured and arranged to calculate a reel density which is used as a measured variable, on the basis of measurement data transmitted by the sensors from the reeling process, wherein the means for controlling the actuators comprise a comparator unit and control unit (9) which is connected to the calculating unit (8), contains information on a desired reel density in set values as a function of the growing size of the reel, and is arranged to compare the determined reel density with the set value and to control the actuators on the basis of the comparisons, wherein the actuators to be controlled comprise a loading device (3) affecting a linear load in the reeling nip (N) and/or an actuator affecting a peripheral force through a torque of the reel spool being driven, and wherein the information on a desired reel density in set values as a function of the growing size of the reel is a decreasing reel density with a growing size of the reel.