Means in the drying section of a paper machine

Details Means in the drying section of a paper machine Means in the drying section of a paper machine

F - Mech Eng,Light,Heat,Weapons

26

B

34/22

F26B 13/08 (2006.01) D21F 5/04 (2006.01)

Patent

CA 1192738

ABSTRACT OF THE DISCLOSURE The invention discloses a paper-machine multiple-cylin- der dryer having a means by which air is transported to the dryer. In conjunction with the means, members are provided by which the outblowing of air is accomplished. It is possible with this means to direct dry air into the vicinity of the web at those points where the evaporation of water from the web is strongest, and thereby to reduce the humidity in such a region, whereby the evaporation of water from the web is promoted. Points of this kind are the initial parts of the cylinder intervals after a cylinder in contact with the web. The air supply means are so placed and their blow-out elements so disposed and directed that the the air blown out from the means is aimed into the cleft of clefts defined by the surface of the drying cylinder and the paper web. With this method an over-pressure is established in the cleft. The supply means is used above all for so-called single-fabric conduction in the pockets on the side of the web to urge the web against the fabric. The means is preferably disposed on the doctor beam or in association therewith.

391285

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