Fiber distributor

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D - Textiles, Paper

04

H

D04H 1/72 (2006.01) D01G 25/00 (2006.01)

Patent

CA 2310061

A forming box (1) is disclosed to an apparatus for dry forming of a fibrous tissue to e.g. preparation of paper. The forming box (1) is provided with a cloud of airborne fibres via transference pipes (6). Under the forming box (1) a forming wire (3) and a vacuum box (5) is placed. In order to achieve a very high capacity as a possibility for the handling of very long fibres, the forming box is prepared without a net or a bottom plate. In place hereof the forming box (1) has an open bottom for release of the fibre material onto the forming wire (3). In the forming box rotating spike rollers (7) are established in such a way that they substantially cover the whole cross sectional area of the forming box. The rotating spike rollers have appeared to make it possible to achieve a very big capacity of formed uniform fibrous tissue on the forming wire and at the time make it possible to handle very long fibres.

L'invention se rapporte à un dispositif comportant un caisson de formation (1) conçu pour former un papier-ménager fibreux, notamment dans la préparation du papier. Ce caisson de formation (1) comporte un nuage de fibres aériennes amenées par l'intermédiaire de tuyaux de transfert (6). Une toile de formation (3) et une caisse aspirante sont disposées sous le caisson de formation (1). De manière à parvenir à une très grande capacité de traitement de fibres très longues, le caisson de formation est conçu sans filet ni plaque inférieure. Il est au contraire muni d'un fond ouvert qui permet de libérer la matière fibreuse sur la toile de formation (3). Le caisson de formation est équipé intérieurement de cylindres à pointes rotatifs (7) qui sont disposés de manière à sensiblement recouvrir toute l'aire de section transversale du caisson de formation. On a constaté que ces cylindres à pointes rotatifs permettent d'une part de former une très grande quantité de papier-ménager fibreux uniforme sur la toile de formation et d'autre part, de traiter de très longues fibres.

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