New Paper Machine Drying Concept: Multi-Functional Radial Jet Reattachment Nozzle Blow Box, 1993 Papermakers Conference Proceedings

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An improved air drying process for a paper machine where air is impinged directly onto a paper web between top and bottom dryers on an open paper draw is disclosed. This provides additional drying and increased machine speed due to improved control of sheet flutter and drying via direct air impingement onto the sheet for all paper grades. The structure provides a radial jet reattachment nozzle to blow air onto the sheet when the paper web is not in contact with the cylinder surface, fabric or felt. The nozzle stabilizes and supports the sheet to prevent sheet flutter and sheet bulging. Its application has been very successful.