Curtain coater and method for curtain coating

Details Curtain coater and method for curtain coating Curtain coater and method for curtain coating

D - Textiles, Paper

21

H

D21H 23/48 (2006.01) B05C 5/02 (2006.01)

Patent

CA 2383862

The present invention relates to a curtain coater and a curtain-coating method for coating a moving web (2) of paper or board. The curtain coater comprises an applicator nozzle (1) located above the web (2) to be coated so as to apply the coating mix therefrom to the surface of the web (2) in the form of a continuous curtain extending uniformly over the cross-machine width of the web (2). The boundary air layer traveling on the surface of the web (2) is removed by a doctoring means (3) which is located upstream in the travel direction of the web (2) in front of the impingement point of the coating mix curtain on the surface of the web (2) and is further located on the same side of the web (2) as the applicator nozzle (1).

L'invention concerne une encolleuse à rideau et un procédé d'encollage par rideau d'une feuille mobile (2) de papier ou de carton. L'encolleuse à rideau comporte une buse d'application (1) située au-dessus de la feuille (2) à encoller afin d'appliquer le mélange d'encollage sur la surface de la feuille (2) sous forme d'un rideau continu s'étendant de manière uniforme dans le sens travers de la feuille (2). La couche limite d'air passant sur la surface de la feuille (2) est enlevée au moyen d'un dispositif d'allongement (3) qui est situé en amont dans le sens de passage de la feuille (2) devant le point d'incidence du rideau de mélange d'encollage sur la surface de la feuille (2) et qui est par ailleurs situé sur le même côté de la feuille (2) que la buse d'application (1).

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