Method and apparatus for coating a moving paper or cardboard...

D - Textiles – Paper – 21 – H

Patent

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D21H 23/50 (2006.01)

Patent

CA 2233855

The invention relates to a method of coating a moving web of paper or paperboard. In the method, the web to be coated is passed to a coater station, wherein a coat layer is applied to at least one surface of the web by means of high-pressure spraying nozzles, whereby the pattern width covered by a single nozzle is essentially narrower than the cross-machine width of the web being coated. The nozzles are adapted into an enclosure and the excess coat mist formed in the process is removed by means of suction tubes, and advantageously, with the help of a falling film of coating mix flowing down the internal wall(s) of the enclosure.

L'invention se rapporte à un procédé de revêtement d'une bande de papier ou de carton en mouvement. Selon ce procédé, la bande devant être revêtue passe dans une station de revêtement où une couche de revêtement est appliquée sur au moins une surface de la bande au moyen d'ajutages de pulvérisation haute pression, la largeur du motif recouvert à l'aide d'un ajutage unique étant bien plus étroite que celle de la bande sur laquelle est en train de se faire l'application d'un revêtement. Les ajutages sont adaptés dans une enceinte et le brouillard excédentaire de revêtement formé dans le processus est retiré au moyen de tubes d'aspiration, et, pour un meilleur résultat, par un film retirant le brouillard de revêtement en descendant le long de la (des) paroi(s) interne(s) de l'enceinte.

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