Device for measuring the porosity of a filter element
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United States of America Patent
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Jul 4, 1995
Grant Date -
N/A
app pub date -
Mar 24, 1994
filing date -
Mar 26, 1993
priority date (Note) -
Expired
status (Latency Note)
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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.
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