Self-cleaning porosimeter

Details Self-cleaning porosimeter Self-cleaning porosimeter

1982-09-24

1985-05-21

Swisher, S. Clement

Measuring and testing

With fluid pressure

Porosity or permeability

1525653, G01N 1508

Patent

active

045178259

ABSTRACT:
A high-speed dynamic porosimeter including a device for removing accumulated debris is disclosed. The porosimeter has an apertured surface, preferably curved, across which a web whose porosity is to be measured is drawn while suction is applied to the apertures. A pressure transducer monitors the pressure in a sensor line or chamber, which pressure varies as a function of the porosity of the web. A scraper blade scrapes debris from the apertured surface from time to time. Preferably, vacuum suction is also applied to a slot at the upstream side of the apertured surface to ensure a good seal between the web and the surface.

REFERENCES:
patent: 2323983 (1943-07-01), Edmondson
patent: 2972767 (1961-02-01), Smith
patent: 3056281 (1962-10-01), Smyth
patent: 3412856 (1968-11-01), Esenwein
patent: 3466925 (1969-09-01), Ziegenhagen et al.
patent: 4025752 (1977-05-01), Whitman
patent: 4121595 (1978-10-01), Heitmann et al.
patent: 4246775 (1981-01-01), Stultz
patent: 4247754 (1981-01-01), Baier

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