Assembly to apply steam to a moving web, of paper/cardboard/tissue, has a curved surface with a steam delivery zone for application without interference from a carried air layer

摘要

The assembly (2) to apply steam to a web (1) of paper or cardboard or tissue, in a production or finishing machine, has a curved surface (4) towards the moving web with steam outlets. The steam outflow forms a steam cushion between the surface and the web. The steam outflow zone (3) is of a porous or sintered material, covering an angle of arc (alpha ).