Papermaking drying section - has suction box with structured sealing bar positions to detach web and carrier belt together from the drying cylinder surface

摘要

Assembly to detach a paper web from a drying cylinder, especially in the drying section of a papermaking or paper processing machine, has a fixed suction box (20) near the take-off point (A) where the carrier belt (8) leaves the drying cylinder (10), with sealing bar holders (21,23) at a gap from the mantle surface (10') of the drying cylinder (10) which is at least 30 mm. In normal operation, each pliable sealing bar (30,31) has a natural stiffness which keeps it free of distortion on a difference in pressure of 0.01-0.1 bar between the suction zone (19) and the ambient environment. ADVANTAGE - The structure and its operation ensure that the paper web leaves the drying cylinder surface together with the carrier belt, without clinging, to prevent paper damage or stretch in the paper web.