PRESSING THE WEB TO THE DRYER IN A DRYER SECTION

摘要

The dryer section of a machine for manufacturing a paper web includes at least one and more usually a plurality of heatable drying cylinders, each of whi ch is wrapped over a part of its circumferential surface by the web of material to be dried. A support belt is guided by guide rolls to wrap over a part of the circumference of each of the drying cylinders and over the web. A pressing device presses against the support belt to press the web of material against the drying cylinder. That pres sing device may comprise a pressure box outside the support belt to which air or stea m pressure is applied. The pressure box may include several zones either along th e web path or transverse to the web path permitting different pressures to be applied. The pressing device may alternately comprise a plurality of pressing rolls extending transversely to the web axis and parallel to the drying cylinder axis and being biased against the support belt, e.g., by Springs, and supported on a support which mov es the pressing rolls toward the support belt.