Device for contact-free guiding of material web over surface has facility whereby volume of gaseous medium flowing beneath web from air cushion is variable by means of adjustable closing element regardless of web format

摘要

The device for contact-free guiding of a material web over a surface (2) has a facility whereby the volume of gaseous medium flowing beneath the web from an air cushion is variable by means of an adjustable closing element (3) regardless of the format of the material web fed over the surface. A number of openings (11) located one behind the other when viewed in the direction of movement are provided in the surface, and the longitudinal extent of the opening exceeds its transverse extent in the surface by a multiple.