DEVICE FOR THE SUSPENSION GUIDANCE OF A TRAVELLING WEB

摘要

The device (100) for the suspension guidance of a travelling web (B) by means of air or another fluid is to be used especially for deflecting a damp paper web. The device comprises a plurality of air ducts (13) extending over the width of the web on one side and bounded by wall surfaces (14). Each air duct (13) comprises a nozzle arrangement (22, 22') communicating with a pressure chamber (10) to which compressed air is applied. In the air ducts (13) there are also air inlet apertures (26) which are not in fluid connection with the pressure chamber (10) but communicate through an intake duct (27) with an intake chamber (17) in which ambient pressure prevails and which has an inlet (19) for the fluid. The additional inlets (26) convey an additional quantity of air into the air duct owing to the injector effect of the compressed air flowing into the air duct, thus avoiding a curvature of the web corresponding to the air duct cross-section and reducing the power consumption of the device by some 25 %.