Document Type and Number:
Japanese Patent JPH0545719
Kind Code:
B2
Abstract:
Apparatus for ventilating pockets in a multi-cylinder dryer of a paper machine of the type in which guide rolls are situated in spaces between adjoining drying cylinders and wherein a wire or felt has free runs between the drying cylinders and the guide rolls. With respect to a particular pocket to be ventilated, the apparatus functions to blow air through the inlet or incoming free run of the wire into the pocket with air being removed from the pocket at least partially through the following or outgoing free wire run following the guide roll. The apparatus comprises nozzle apparatus including a nozzle nose situated proximate to the incoming free wire run, at least two nozzles being defined by the nozzle nose which extend transversely to the direction of run of the wire. Air is blown through the nozzles into a space defined by the incoming free wire run facing the nozzles, by the guide roll and by the nozzle nose. In this manner, a positive pressure is generated in an area of the wire over a length of the incoming free wire run by the effect of which air flows within the area through the wire into the pocket. The nozzles are preferably situated at each of the opposite edges of the nozzle nose.
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Inventors:
PETSUKA ESUKERINEN
UESA UORINEN
UESA UORINEN
Application Number:
JP2527984A
Publication Date:
July 09, 1993
Filing Date:
February 15, 1984
Export Citation:
Assignee:
VALMET OY
International Classes:
D21F1/00; D21F5/04; F26B13/08; (IPC1-7): D21F5/04; F26B13/08
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