Patent ID: 6325323
Filing Date: 2001-12-04
Classification: B65H

Abstract:
Arrangement for controlling the nip force in a reel-up gear in a paper machine, including a pair of primary arms (6,7) and secondary arms (8,9) for supporting and positioning a tambour core (2,3) at the paper web winding operation as well as at the change-over procedure when the tambour core is replaced and wherein each of said arms being connected to an hydraulic cylinder (10,11) for altering the respective positions of the arms, the primary arms (6,7) as well as the secondary arms (8,9) includes load cells (12,15) for measuring the nip force (F) for the respective arms against the tambour core (2,3) and controlling said nip force to be maintained within preestablished limited characterized in that the position of the primary arms (6,7) is measured and controlled by individual first position sensors (14) with hydraulic cylinders (10) for a parallel lowering of the tambour core (3), that the position of the secondary arms is measured by individual second position sensors (16) for a parallel engagement with the tambour core (2) and that in addition to the load cells (12,15) in the primary- and secondary arms of the reel-up gear the control system also includes a pair of holding bracket force load cells (17) in a holding bracket (4) of the tambour core for measuring the additional force from said holding bracket, and the holding bracket force load cells being in contact engagement with the holding bracket and in contact engagement with the pressure cylinder for the holding bracket force load cell.