Apparatus and method for direct or indirect application of a liquid or pasty medium onto a traveling material web

摘要

An apparatus for direct or indirect application of a liquid or pasty medium onto a traveling material web includes at least one rotatable backing roll wrapped in part by the material web and supporting a side of the material web near the backing roll. The backing roll surface and the material web form a cuneiformly tapering entrance gore and an exit gore. At least one applicator opposes the backing roll and coats a side of the material web away from the backing roll with the medium, and/or further treats the coated material web side. A boundary layer stripper is arranged, in relation to the direction of rotation of the backing roll, before the applicator. The boundary layer stripper removes an air boundary layer entrained by the backing roll and/or the material web. The air boundary layer stripper is arranged in the entrance gore between the backing roll surface and the side of the material web near the backing roll.