Paper coating apparatus and method for coating paper

Details Paper coating apparatus and method for coating paper Paper coating apparatus and method for coating paper

D - Textiles, Paper

21

H

D21H 23/70 (2006.01) D21F 5/00 (2006.01) D21H 23/72 (2006.01)

Patent

CA 2278633

Apparatus and method for coating a moving paper web, in which method the web (2) to be coated is first guided to a coating station (7) correctly aligned and a first side of the web (2) is coated with a coat layer. Next, the web (2) is guided upwards from the coating station (7) and the first coat layer is dried using non-contact dryers (8, 9). From the dryers the web (2) is guided to the next coating station (14) correctly aligned and the second side of the web (2) is coated with a coat layer, the web (2) is guided upwards from the coating station (14) and the coat layer on the second side of the web (2) is dried using non- contact dryers (8, 9). When the web is directed from the coating station (7) via the dryers (8, 9), it (2) is guided non-contactingly by means of air jets such that the web (2) is first non-contactingly turned in the machine direction during drying and next, similarly during drying, towards the level of the coating stations (7, 14).

L'invention concerne un dispositif et un procédé permettant de coucher une bande continue de papier en mouvement. Selon le procédé, la bande (2) destinée à être couchée est guidée vers un poste de couchage (7), correctement alignée, puis une première face de la bande (2) est revêtue d'une couche de couchage. Ensuite, la bande (2) est guidée vers le haut depuis le poste de couchage (7) et la première couche de couchage est séchée par des cylindres sécheurs sans contact (8, 9). Depuis ces derniers, la bande (2) est guidée jusqu'au prochain poste de couchage (14), correctement alignée, et sa seconde face est revêtue d'une couche de couchage; puis elle est guidée vers le haut depuis le poste de couchage (14) et la couche de couchage déposée sur sa seconde face est séchée par des cylindres sécheurs sans contact (8, 9). Quand la bande part du poste de couchage (7) et passe par les cylindres sécheurs (8, 9), elle est guidée sans contact par des jets d'air, de façon à tourner sans contact d'abord dans la direction de la machine durant le séchage, puis, toujours durant le séchage, en direction des postes de couchage (7, 14).

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