Method and apparatus for improving the air flow through an...

D - Textiles – Paper – 04 – H

Patent

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19/3

D04H 1/72 (2006.01) D04H 1/70 (2006.01)

Patent

CA 2237431

This invention relates to improved aerodynamics in dry fiber web forming machines and particularly to airlays which form high quality webs. The invention includes a disperser roll for feeding fibers into the air stream and a second roll opposite to the disperser roll for balancing the disruptive effects of long stationary walls and rotating members in the air duct. In one alternative arrangement of the invention, the fibers are also fed to the air stream by a second disperser roll opposite the first disperser roll.

Cette invention se rapporte à l'amélioration de l'aérodynamique dans des machines de formation de nappes de fibres par voie sèche et en particulier à des feuilles formées par voie pneumatique qui constituent des nappes de haute qualité. Dans cette invention, on utilise un cylindre disperseur pour amener les fibres dans le courant d'air, ainsi qu'un autre cylindre, opposé au cylindre disperseur, pour équilibrer les effets perturbateurs des longues parois fixes et des éléments en rotation dans le conduit d'air. Dans une variante de cette invention, des fibres sont également amenées dans le courant d'air par un second cylindre disperseur opposé au premier cylindre disperseur.

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