DEVICE FOR STABILIZING THE RUN OF A METERIAL WEB, SPECIFICALLY FOR STABILIZING A PAPER WEB IN THE DRYING SECTION OF A PAPER MACHINE

摘要

In a device for stabilizing the run of a material web, which successively runs over two rolls, namely a delivering and a receiving roll, there is a box provided that extends between the delivering and the receiving roll across the width of the paper web. This box has a so-called guide wall that extends along the course of the material web, with an air gap remaining between the guide wall and the material web. Additionally provided on the box are means which create a vacuum in the air gap. In a device of this type, the guide wall is shaped in a way such that its spacing from the theoretical trajectory plane tangent to the two rolls is in the center area of the material web greater than it is in the area of the material web edges. A device of this type serves to better stabilize the smooth running of the material web on its way between the rolls. A preferred applicational area of the invention is an air guide box for the drying section of a high-speed paper machine where the paper web to be dried meanders together with a backing belt over drying cylinders.