Apparatus to produce a fibrous web

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 5/18 (2006.01) D21F 9/00 (2006.01) D21F 11/00 (2006.01) D21F 11/14 (2006.01)

Patent

CA 2673179

An apparatus for producing a fibrous web which is provided with a three-dimensional surface structure, in particular a paper, paperboard or tissue web, comprises a headbox, a forming element such as, in particular, a forming roll, a structured belt and a dewatering belt, wherein the structured belt and the dewatering belt run together with the formation of a stock inlet gap and are guided over the forming element with the structured belt as inner belt and the dewatering belt as outer belt, and wherein fibrous stock suspension is introduced into the stock inlet gap by means of the headbox. In the region of the outlet gap which is formed between the forming element and the structured belt which runs away from the latter, at least one collecting device is provided for water, fibres, fines and/or the like which accumulate/accumulates in the region of said outlet gap.

Ce dispositif de fabrication d'une bande de matière fibreuse pourvue d'une structure de surface à trois dimensions, notamment d'une bande de papier, de carton ou de tissu, comprend une amenée de matière, un élément de formage, comme notamment un cylindre de formage, une bande structurée et une bande d'égouttage. La bande structurée et la bande d'égouttage convergent en formant une fente d'entrée de matière, et elles sont dirigées sur l'élément de formage avec la bande structurée comme bande intérieure et la bande d'égouttage comme bande extérieure. Au moyen de l'amenée de matière, une suspension de matière fibreuse est introduite dans la fente d'entrée de matière. Dans la région de la fente de sortie formée entre l'élément de formage et la bande structurée quittant ce dernier, il est prévu au moins un dispositif collecteur pour l'eau, les fibres, les matières fines et/ou analogues arrivant dans la région de cette fente de sortie.

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