Abstract: When drying a web-formed material, the web-formed material is passed, in contact with a gas-permeable dryer screen, through a drying plant. One or more fans blow hot process air against, and through, the web-formed material in order to dry it. A chamber, surrounding the fan or the fans, has a limiting surface that is essentially parallel to the surface of the web-formed material. This limiting surface has an opening that extends essentially across the whole width of the web-formed material. A distributing member, in the form of an arcuate perforated, sheet-formed element, placed outside the chamber, covers the opening completely. With the distributing member a first flow of process air is divided into a large number of jets, distributed over essentially the whole of the angular area that faces the web-formed material.

Abstract: When drying a web-formed material, the web-formed material is passed, in contact with a gas-permeable dryer screen, through a drying plant. One or more fans blow hot process air against, and through, the web-formed material in order to dry it. A chamber, surrounding the fan or the fans, has a limiting surface that is essentially parallel to the surface of the web-formed material. This limiting surface has an opening that extends essentially across the whole width of the web-formed material. A distributing member, in the form of an arcuate perforated, sheet-formed element, placed outside the chamber, covers the opening completely. With the distributing member a first flow of process air is divided into a large number of jets, distributed over essentially the whole of the angular area that faces the web-formed material.

Abstract: For the purpose of transferring a leader of a web-formed material (1) from a first treatment step to a subsequent second treatment step, the web-formed material (1) is divided by forming a strip (1a) in one edge portion of the web-formed material. The strip (1a) is passed in between two sharp edges (5a,6a) located close to each other, such that the two sharp edges (5a,6a) embrace the strip like a pair of shears. Thereafter, one of the sharp edges (6a) is moved towards the other (5a) so that said one edge (6a) passes said other edge (5a), hence cutting off the strip. With the same movement, the leader is given an impulse, in a direction essentially perpendicular to the strip (1a), towards a leader conveyor (7,8) which intercepts the leader and passes it into the second treatment step.