APPARATUS WITH AN IMPERMEABLE TRANSFER BELT IN A PAPERMAKINGMACHINE, AND ASSOCIATED METHODS

摘要

An apparatus for transferring a wet paper web from a press nip to a dryin g cylinder (52) of a papermaking machine, and for structuring the web, compr ises an impermeable transfer belt (35) having a web-contacting surface, the wet paper web passing through the press nip enclosed between a press felt (3 3) and the transfer belt, and a permeable structuring fabric (37) for transf er of the web onto the drying cylinder, the structuring fabric having a stru ctured surface and being arranged in a loop within which a suction transfer device (38) is disposed, said suction transfer device having a suction zone (41). According to the invention the web-contacting surface of the belt has a non-uniform distribution of microscopic-scale depressions, and that the su ction zone includes a transfer point (40) spaced a distance D from the press nip along which the belt runs, the belt being arranged to bring the web int o contact with the structuring fabric in the suction zone for a length L, su ch that suction is exerted on the paper web to transfer the paper web from t he belt onto the structuring fabric. at the transfer point.