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Machine translation
1. (WO1981002753) PROCEDURE IN THE WIRE SECTION OF A PAPER MACHINE,AND TWIN-WIRE FORMER APPLYING THE PROCEDURE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002753    International Application No.:    PCT/FI1981/000018
Publication Date: 01.10.1981 International Filing Date: 13.03.1981
IPC:
D21F 2/00 (2006.01), D21F 9/00 (2006.01)
Applicants:
Inventors:
Priority Data:
800808 14.03.1980 FI
Title (EN) PROCEDURE IN THE WIRE SECTION OF A PAPER MACHINE,AND TWIN-WIRE FORMER APPLYING THE PROCEDURE
(FR) PROCEDE CONCERNANT LA SECTION DE LA TOILE D'UNE MACHINE A PAPIER ET TRIANGLE A TOILE DOUBLE DE MISE EN OEUVRE DU PROCEDE
Abstract: front page image
(EN)A procedure for dewatering and detaching a paper web (W) from the second former wire (13). The composite of first and second wire (12, 13) and interposed web (W) is contacted with a first cover part (33; 331) of a special suction box (30). A roll (23) guiding the second wire (13), pressing from the side of the latter deflects its run. This pressure plus centrifugal force, and the differential pressure arising from the suction box (30), dewater the web (W). The second wire (13) is separated to follow along with the guide roll (23), while web (W) and first wire (12) are acted on by the suction box (30) vacuum. The first wire (12) is then contacted with a second cover part (34; 341, 342, 343, 344; 348, 349) of the suction box (30). A twin-wire former is also disclosed, featuring within its carrying wire loop (12), on its twin-wire nan, a rotating forming roll (15; 151, 152) deflecting the composite of wires (12, 13) and web (W) as it laps a given sector ((Beta)F) of said forming roll (15; 151, 152). A special suction box (30) at the ultimate end of the wires (12, 15) has a bipartite cover its parts (33, 34) angulated against each other and preferably planar.
(FR)Procede d'assechement de l'eau et de detachement d'une feuille de papier (W) de la seconde toile d'un triangle (13). L'ensemble composite de la premiere et de la seconde toiles (12, 13) et de la feuille interposee (W) est mis en contact avec un premier couvercle (33; 331) d'un caisson d'aspiration special (30). Un rouleau (23) guidant la seconde toile (13) comprimant du cote de cette derniere devie sa course. Cette pression plus la force centrifuge, et la pression differentielle provenant du caisson d'aspiration (30), extraient l'eau de la feuille (W). La seconde toile (13) est separee pour continuer a l'aide du rouleau de guidage (23), tandis que la feuille (W) et la premiere toile (12) sont soumises au vide ou depression du caisson d'aspiration (30). La premiere toile (12) est alors mise en contact avec un second couvercle (34; 341, 342, 343, 344; 348, 349) du caisson d'aspiration (30). Un triangle a toile double est egalement decrit, se caracterisant dans sa boucle de toile de transport (12), sur sa course a toile double, par un rouleau de formation rotatif (15; 151, 152) deviant l'ensemble composite des toiles (12, 13) et de la feuille (W) lorsqu'il chevauche un secteur donne ((Beta)F) du rouleau de formation (15; 151, 152). Un caisson d'aspiration special (30) a l'extremite des toiles (12, 13) possede un couvercle en deux parties (33, 34) faisant un angle entre elles, et de preference planes.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)