Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1981-11-24
1983-11-22
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34116, 34117, F26B 1308
Patent
active
044160704
ABSTRACT:
An air-directing device for directing air to the multiple cylinder dryer of a paper machine includes members for blowing dry air into the vicinity of the web at those points where the evaporation of water from the web is strongest. This reduces the humidity in such regions and promotes the evaporation of water from the web. The points are the initial parts of the cylinder intervals after contact with the web. The air-directing device is so placed, and its air-blowing members are so disposed and directed, that the air blown out from such members is directed into the clefts defined by the surface of the drying cylinder and the paper web. This achieves a pressure effect in the clefts. The air-blowing members are primarily used in connection with single fabric conduction in pockets on the side of the web to urge the web fast to the fabric and are preferably disposed on a doctor beam or in conjunction therewith.
REFERENCES:
patent: 992688 (1911-05-01), Pope
patent: 1438211 (1922-12-01), Baetz
patent: 1536230 (1925-05-01), McCue
patent: 1595478 (1926-08-01), Minton
patent: 2931107 (1960-04-01), Sellers
patent: 3250019 (1966-05-01), Beachler
patent: 3358384 (1967-12-01), Gustafsson et al.
patent: 3908368 (1975-09-01), Witt
Eskelinen Pekka
Kotanen Jorma
Lindstrom Yngve
Vedenpa Timo
Schwartz Larry I.
Valmet Oy
Westphal David W.
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