Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1993-07-12
1995-01-10
Gromada, Denise L.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34116, 34117, 34120, F26B 1102
Patent
active
053795261
ABSTRACT:
An apparatus in the dryer section of a papermaking machine for preventing the flutter of a paper web comprises an air blow box located between adjacent cylinders within a loop of a support fabric (F) formed by a guide roll. The blow box includes a blow chamber, into whose wall opens a nozzle for providing an ejector assembly together with an opposite wall included in the box. The walls build therebetween a flow path direct towards an uncovered section of support fabric (F). An air current discharging from nozzle is delivered through the flow path and into a space confined by the uncovered section of support fabric (F) and thereby through the support fabric. The air current creates a vacuum in a space defined between the ejector assembly and a section of support fabric (F) carrying the web (W).
REFERENCES:
patent: 4502231 (1985-03-01), Fissmann et al.
patent: 4669198 (1987-06-01), Wedel
patent: 4694587 (1987-09-01), Eskelinen
patent: 4821429 (1989-04-01), Sieberth
patent: 4891891 (1990-01-01), Wedel
patent: 4893741 (1990-01-01), Heinzmann
patent: 4899463 (1990-02-01), Heikkila et al.
patent: 5086571 (1992-02-01), Hietanen
patent: 5115581 (1992-05-01), Viitanen
Gromada Denise L.
Valmet Paper Machinery Inc.
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