Method and apparatus in a paper machine single-wire drying...

Details Method and apparatus in a paper machine single-wire drying... Method and apparatus in a paper machine single-wire drying...

D - Textiles, Paper

21

F

34/23

D21F 5/04 (2006.01) F26B 13/08 (2006.01) F26B 17/28 (2006.01)

Patent

CA 1299865

88-389 METHOD AND APPARATUS IN A PAPER MACHINE SINGLE-WIRE DRYING GROUP Abstract of the Disclosure A single drying group in a paper machine is disclosed in- cluding a plurality of drying cylinders whose axes are situated in a substantially common plane, a drying wire carrying a web between successive drying cylinders, one or more deflection rolls, each situated between a pair of successive drying cylinders and wherein the web-carrying drying wire has an incoming run from a drying cylinder to a deflection roll whereupon the drying wire runs over a deflection sector of the deflection roll and then to a subsequent drying cylinder. A blow box has a wall which defines a gap space with the incoming run of the web-carrying wire and a gas flow is directed through the gap space to induce an under pressure on the incoming run to fix the web on the drying wire. The deflection roll has a perforated shell in the perforations of which an underpressure is maintained to insure that the web remains in contact with the outer surface of the drying wire as the drying wire travels over the deflection or closed sector of the deflection roll. -1-

576326

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