Marquip, LLC

Matthew A Tourdot

Carl R Marschke

Harold D Welch

Paul A Garvoille

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.

Vacuum assisted web drive for corrugator double backer

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 belt or a series of transport belt sections to the upper surfaces of which a vacuum is applied. The vacuum drive belt may have portions which are unsupported between laterally spaced vacuum slots, supported on a reduced friction support surface, or supported by air bearings to reduce friction and drive power requirements.

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McFarland, WI, United States of America

Matthew A Tourdot