Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1988-06-13
1990-10-23
Chin, Peter
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
162217, 162301, 162363, D21F 902
Patent
active
049649566
ABSTRACT:
A method of and an arrangement for leading a web on to a desired wire in a paper machine or the like. When the web moves between two wires, it is transferred on to one wire after the wires have moved in parallel over a distance with the web therebetween making contact with both wires. The transfer takes place when the wires start to move in different directions by sucking the web on to one of the wires by a vacuum acting through said wire. For improving the detachment of the web from the other wire, the direction of travel of the wire is changed abruptly at the parting point of the wires by leading it along a suction box comprising a cover piece formed by cleats and arranged to form an angle in such a way that the point of the angle projects towards the wire. When the wire moves along the cleats of the cover piece of the suction box, its direction of travel is abruptly changed at the point line of the angle, whereby the web is detached from the other wire completely in a moment.
REFERENCES:
patent: 4146424 (1979-03-01), Justus
patent: 4154645 (1979-05-01), Kankaanpaa162301
Hietikko Erkki
Kylmakorpi Ilpo
Lamminen Veikko
Chin Peter
Dang Thi
OY Tampella AB
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