Vacuum assisted web drive for corrugator double backer
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United States of America Patent
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Jan 12, 1999
Issued Date -
N/A
app pub date -
Jul 17, 1997
filing date -
Jun 26, 1995
priority date (Note) -
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Abstract
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.
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