Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1996-10-23
1998-03-17
Williams, Hezron E.
Measuring and testing
With fluid pressure
Porosity or permeability
73189, 34114, G01N81508
Patent
active
057289301
ABSTRACT:
A method and device for measuring the permeability of a drying wire to air in which the measurement is carried out continuously while the drying wire moves. The drying wire is guided to run so that it passes over a blow box and a measurement box free of contact, and the pressure in the measurement box and/or the relative change in the pressure is/are measured when the blow box is creating a pressure differential between the blow box and the measurement box in the vicinity of the wire. The pressure and/or the relative change in the pressure is/are compared with earlier measurement results and/or starting values (reference values). The permeability to air of the drying wire is determined on the basis of comparison of the pressure and/or of the relative change in the pressure, and the contact-free measurement is produced by guiding the flow into or out of the measurement box to pass through a gap between the measurement box and the drying wire.
REFERENCES:
patent: 3138014 (1964-06-01), Jorre
patent: 3668787 (1972-06-01), Nils-Christian
patent: 4471649 (1984-09-01), Cronshaw
patent: 4602439 (1986-07-01), Pekka
patent: 4625430 (1986-12-01), Aula
patent: 4676091 (1987-06-01), Schuster et al.
patent: 4692215 (1987-09-01), Kerttula
patent: 4694587 (1987-09-01), Eskelinen
patent: 4730481 (1988-03-01), Schlipf
patent: 4889598 (1989-12-01), Niskanen
patent: 4892621 (1990-01-01), Eskelinen
patent: 4905380 (1990-03-01), Eskelinen
patent: 4905500 (1990-03-01), Mason
patent: 4932138 (1990-06-01), Liedes
patent: 4953297 (1990-09-01), Eskelinen
patent: 4991425 (1991-02-01), Gulya et al.
patent: 4992142 (1991-02-01), Nguyen
patent: 4996782 (1991-03-01), Eivola
patent: 5019213 (1991-05-01), RaimoVirta
patent: 5094718 (1992-03-01), Friend
patent: 5115581 (1992-05-01), Viitanen
patent: 5163236 (1992-11-01), Heikkila
patent: 5383287 (1995-01-01), Kuhasalo
patent: 5393383 (1995-02-01), Karvinen
patent: 5426867 (1995-06-01), Yli-Kauppila
patent: 5495678 (1996-03-01), Ilmarinen
patent: 5534116 (1996-07-01), Karvinen
patent: 5535527 (1996-07-01), Virta
patent: 5555638 (1996-09-01), Lehosvuo
Politzer Jay L.
Valmet Corporation
Williams Hezron E.
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