D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 5/04 (2006.01)
Patent
CA 2305365
The invention concerns a method and a device in the dryer section of a paperboard machine. In the dryer section a normal single-wire draw is applied at least partly in which method the web (W) is passed through the dryer group on support of a drying wire (H). The drying wire (H) presses the web (W) on the drying cylinders (Kn. Kn+1...) against the heated cylinder faces, and on the reversing cylinders or rolls (Sn, Sn+1...) between the drying cylinders (10) the web (W) remains at the side of the outside curve. There is one integrated device, through which a support suction and/or blowing is produced in order to improve the runability of the web (W) and to keep the web (W) in contact with the face of the wire, and through which same device, additionally, impingement blowing is produced in order to dry the web (W) and/or to control its tendency of curling.
Cette invention concerne un procédé et un dispositif qui sont destinés au train de séchage d'une machine de fabrication de papier et/ou de carton, train dans lequel on applique au moins partiellement un étirage à fil unique normal. D'après ce procédé, la bande continue (W) qui traverse le groupe de séchage est supportée par un fil de séchage (H). Ce fil de séchage (H) va presser la bande continue (W) sur des cylindres de séchage (Kn, Kn+1, ...) contre les surfaces chauffées de ces derniers, tandis que sur les cylindres ou rouleaux de retournement (Sn, Sn+1, ...) se trouvant entre les cylindres de séchage (10), la bande continue (W) reste du côté de la courbe extérieure. Un dispositif intégré va produire une aspiration et/ou un soufflage de support permettant d'améliorer la capacité de défilement de la bande continue (W) et de la maintenir en contact avec la face du fil. Ce même dispositif va également produire un soufflage par projection qui va sécher la bande continue (W) et/ou ajuster sa tendance au roulage.
Juppi Kari
Kaihovirta Juha
Milosavljevic Nenad
Saarikivi Pekka
Virta Raimo
Metso Paper Inc.
Sim & Mcburney
Valmet Corporation
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