Low frequency sound distribution of rotary fiberizer veils

D - Textiles – Paper – 04 – H

Patent

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Details

D04H 1/70 (2006.01) D04H 1/72 (2006.01) D04H 1/74 (2006.01)

Patent

CA 2188036

A method and device is disclosed for distributing a veil by applying low frequency sound to at least one portion of the veil, and causing the veil to deviate in its generally downward direction of travel. In its simplest embodiment, the lapping device of the present invention includes one low frequency sound generator having one resonator tube shaped for emission of low frequency sound and having an open end from which sound may be emitted to a portion of a veil. Preferably, the lapping device has two resonator tubes whose open ends are in spaced, opposing relationship, and in the preferred method low frequency sound is alternately applied at generally opposing locations near the veil, causing portions of the veil to deviate in generally alternate directions in its direction of travel.

L'invention se rapporte à un dispositif et à un procédé de distribution d'un ruban de fibres, procédé consistant à appliquer un son basse fréquence dans au moins une partie de ce ruban, et à dévier ce ruban en le dirigeant généralement vers le bas. Selon un mode de réalisation plus simple, le dispositif de formation de ruban de la présente invention comprend un générateur de son basse fréquence comportant un tube résonateur configuré de façon à émettre un son basse fréquence, et une extrémité ouverte d'où peut être émis le son. De préférence, le dispositif de formation de ruban possède deux tubes résonateurs dont les extrémités ouvertes sont espacées et opposées, et selon le procédé préféré, un son basse fréquence est appliqué alternativement à des points généralement opposés situés près du ruban, faisant ainsi dévier des parties du ruban dans des sens généralement alternés au cours de son déplacement vers le bas.

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