Vacuum assisted web drive for corrugator double backer

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 20/10 (2006.01) B65H 5/22 (2006.01) B65H 37/04 (2006.01) D21F 11/12 (2006.01)

Patent

CA 2240746

A double backer for curing the web bonding adhesive and drying the corrugated paperboard web utilizes a web holddown apparatus for maintaining the web in intimate drying contact with the lower heating units which does not require the use of a driven holddown belt. The web is pulled through the double backer by a downstream vacuum conveyor section comprising a single full width belt to the upper surfaces of which a vacuum is applied. The vacuum drive belt has low friction strips on the underside by which the belt is supported on vacuum plenum support surfaces and a unique pattern of vacuum distribution channels on the other side of the belt which together reduce friction and drive power requirements.

Encolleuse double-face servant à traiter l'adhésif liant une bande ainsi qu'à sécher une bande de carton ondulé au moyen d'un appareil de retenue, afin de maintenir la bande en très bon contact de séchage avec les unités de chauffe inférieures sans avoir recours à une courroie de retenue entraînée. La bande est tirée à travers l'encolleuse par une section de transporteur à vide en aval comprenant une simple courroie pleine largeur où le vide est appliqué au niveau des surfaces supérieures. La courroie entraînée à vide est munie de rubans à coefficient de frottement réduit sur sa face inférieure, où la courroie est soutenue sur les surfaces de support de plenum à vide, ainsi que d'un modèle unique de canaux de distribution à vide sur l'autre côté de la courroie permettant de réduire la friction et les exigences en matière de puissance d'entraînement.

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