Advancing material of indeterminate length – By fluid current – And web storage
Patent
1991-05-02
1993-04-06
Stodola, Daniel P.
Advancing material of indeterminate length
By fluid current
And web storage
226196, 34156, B65H 2014
Patent
active
051996235
ABSTRACT:
A device for contact-free supporting, turning, and spreading of a paper web, comprises a face (K) curved in accordance with the turning of the web (W), in connection with which face (K) the web (W) runs supported by air blown in between the face (K) and the web (W). The nozzle members in the device comprise guide faces (28a, 28b) and carrier faces (27, 37) placed in connection with the guide faces, air being blown through nozzle slots (26a,26b,36) in the nozzle members, transverse to the direction of running of the web (W), onto the carrier faces (27,37). The nozzle slots (26a,26b,36) are, from one side, defined by the guide faces (28,28b,38). The air-supported face (K) in the device is defined by carrier faces (27,37) substantially parallel to the run of the web (W) to be supported, provided at float-nozzle boxes (20) and at foil-nozzle boxes (30). In the direction of running of the web (W), the first nozzle box and the last nozzle box are float-nozzle boxes (20), in which the nozzles (26a,26b) that flow (F.sub.1) against each other produce pressurized carrier faces (K+). Between the float-nozzle boxes (20), there are one or several foil-nozzle boxes (30). Between the nozzle boxes (20,30), there are pressure equalization pockets (18).
REFERENCES:
patent: 3279091 (1966-10-01), Freuler
patent: 4218833 (1980-08-01), Coar
patent: 4288015 (1981-09-01), Curtain
patent: 4698914 (1987-10-01), Shi et al.
patent: 4848633 (1989-07-01), Hagen et al.
Heikkila Pertti
Jokioinen Ilkka
Karlstedt Bertel
Parvinen Jukka
Rajala Raimo
Bowen Paul
Stodola Daniel P.
Valmet Paper Machinery Inc.
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