Fixation device

Details Fixation device Fixation device

D - Textiles, Paper

21

F

92/21

D21F 3/00 (2006.01) D21F 1/00 (2006.01)

Patent

CA 1299905

52481 ABSTRACT Fixation device for permeable web materials, such as felts and wires for paper maschines, where air at control- led temperature and pressure is pressed through the web from jets in at least one pressure chamber (12) on one side of the web, to at least one corresponding suction chamber (15) on the other side of the web, the device thereby comprising an upper structure (9) and a lower structure (10) between which the web is running during operation where a pressure chamber (16) with a corresponding suction chamber (13) being arranged in front of, and a pressure chamber (14) with a corresponding suction chamber (11) being arranged behind, at least one middle pressure chamber (12) with a corresponding suction chamber (15), each pressure chamber (12, 14, 16) being provided with two jets arranged in an accute angle to the web and towards each other, with one front jet (17, 19, 21) and one rear jet (18, 20, 22), thereby establishing and maintaining an overpressure between the jets and the web, jets arranged in opposed pressure chambers and adjacent each other thereby directing air passed each other in such a way that air from one pressure chamber substantially is prevented in penetrating into the adjacent suction chamber, and the upper and lower structures (9, 10) being provided with ducts (30, 31) for an air flow having a controlled tempe- rature, thereby avoiding deformations of the upper structure (9) due to temperature influences from the heated air in the fixation process. (Fig. 1)

539754

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