Suction box to hold a fiber web against a carrier belt has an open side to act on the carrier and web with a guide rod to reduce the penetration of the belt into the box through the suction action

摘要

The suction box (1), with an open side (2) to hold a web (3) of paper or cardboard or tissue at a belt (4) as a blanket or fourdrinier in a papermaking or cardboard production and/or finishing machine, has an inner (5) underpressure. The belt (4) is led by at least one guide (6) near the suction box (1) to reduce the max. penetration entry of the belt into the suction box by the suction action. The guide (6) is at the center of the suction box (1). Where there are a number of adjacent suction boxes, the belt (4) is led over at least one guide (6) between at least two suction boxes (1) in the belt path. The guide (6) is aligned across the direction of web (3) travel, preferably as a guide rod.