D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 5/04 (2006.01) D21G 9/00 (2006.01)
Patent
CA 2052059
ABSTRACT OF THE DISCLOSURE A method and device in a multi-cylinder dryer of a paper machine in the threading of the paper web, the threading taking place substantially without a system of threading ropes, which provides a reliable transfer and support effect for the leader is disclosed. The web is passed along a meandering path, in twin-wire draw, over drying cylinders and, in single-wire draw, on a drying wire over drying cylinders and leading suction cylinders or rolls. The leader is guided by means of air blowings extending across a substantial proportion or the whole of its width. The air blowings are applied from a doctor beam to an area proximate to the tip of the doctor blade at an acute angle in relation to the plane of the doctor blade.
La présente invention porte sur une méthode et un appareil utilisés dans une sécherie multicylindre d'une machine à papier et servant à enfiler une bande de papier, essentiellement sans utiliser un système de câble d'enfilage. La présente méthode prévoit un moyen efficace de transfert et d'appui de l'amorce. La bande est enfilée le long d'un trajet qui serpente, dans le cas de formation entre deux toiles, par-dessus des cylindres sécheurs et, dans le cas de formation sur toile unique, sur une toile de séchage, par-dessus des cylindres sécheurs et des cylindres ou rouleaux de succion avant. L'amorce est guidée au moyen de dispositifs de soufflage disposés sur toute la largeur ou presque de l'amorce. Les dispositifs de soufflage sont montés près de la pointe d'une racle, de manière à former un angle aigu par rapport au plan de la racle.
Ilvespaa Heikki
Kuhasalo Antti
Yli-Kauppila Jouko
Sim & Mcburney
Valmet Corporation
LandOfFree
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