Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1984-02-28
1985-09-10
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34116, 34122, F26B 1308
Patent
active
045397627
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.
REFERENCES:
patent: 3110575 (1963-11-01), Justus
patent: 3337968 (1967-08-01), Krikorian et al.
patent: 3384973 (1968-05-01), Johansson
patent: 3388479 (1968-06-01), Gardner
patent: 3427727 (1969-02-01), Villalobos
patent: 3668787 (1972-06-01), Berg et al.
patent: 4268974 (1981-05-01), Price
patent: 4416070 (1983-11-01), Vedenpaa et al.
patent: 4441263 (1984-04-01), Vedenpaa
Eskelinen Pekka
Vuorinen Vesa
Schwartz Larry I.
Valmet Oy
Westphal David W.
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