Patent ID: 8997371
Filing Date: 2015-04-07
Classification: F26B

Abstract:
1. A device for the flow-through treatment of web-shaped, gas permeable material, comprising: a sieve drum that is rotatably supported and is connected with a vacuum generator, the sieve drum having a permeable outer circumference, wherein the material web to be treated travels around a part of the outer circumference of the sieve drum, a treatment chamber accommodating the sieve drum, which is exposed to gas to be treated, and within the treatment chamber, a sieve cover or corresponding flow guide elements are provided surrounding the sieve drum in the area wrapped by the material web, by which the gas flowing in the treatment chamber is directed towards the sieve drum surface, wherein the wall of the treatment chamber, which faces the outer circumference of the sieve drum in the area of wrapping by the material web, has, in this area and as seen in a direction of rotation of the sieve drum, a decreasing distance to the surface of the sieve drum such that a distance to the surface of the sieve drum at a beginning of the area of wrapping by the material web is greater than a distance to the surface of the sieve drum at an end of the area of wrapping by the material web.