Device for measuring the porosity of a filter element

Details Device for measuring the porosity of a filter element Device for measuring the porosity of a filter element

1994-03-24

1995-07-04

Williams, Hezron E.

Measuring and testing

With fluid pressure

Porosity or permeability

G01N 1508

Patent

active

054289874

ABSTRACT:
The device embodying the invention uses a filter element encapsulating me acting like a sphincter, a means enabling an air flow to be generated through the filter element once the filter element has been encapsulated, and a means enabling measurement of at least one parameter relating to the fluid flow through the filter. The encapsulating means comprises a succession of encapsulation modules arranged coaxially end to end and each acting like a sphincter, independently of the others, by means of a control means separate from that of the others. The invention applies notably to the measurement of draw through the filter sticks used in filter-tipped cigarettes.

REFERENCES:
patent: 4069704 (1978-01-01), Grant, Jr. et al.
patent: 4246774 (1981-01-01), Flesselles et al.
patent: 4627448 (1986-12-01), Kamm et al.
patent: 4912964 (1990-04-01), Ohtsuki et al.

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