Variable length encapsulating pressure drop tester

Details Variable length encapsulating pressure drop tester Variable length encapsulating pressure drop tester

1976-05-25

1978-01-24

Yasich, Daniel M.

Measuring and testing

With fluid pressure

Porosity or permeability

73 410, 73 492, G01M 302, G01N 1508

Patent

active

040697045

ABSTRACT:
An apparatus for testing tobacco smoke filter rods and similar articles of varying lengths for pressure drop across the opposed ends of a rod encapsulated in an air-impervious sleeve comprising a housing having a longitudinal bore, a rod receptacle having an air-impervious encapsulating sleeve mount therein, slideably mounted in the bore, a hollow rod stop stationarily mounted in the bore and extending into the sleeve of the rod receptacle, means for expanding the air-impervious sleeve, vacuum means communicating with the hollow interior of the rod stop and means for measuring the pressure drop interposed between the vacuum means and the hollow rod stop.

REFERENCES:
patent: 2951364 (1960-09-01), Sherrill
patent: 3115767 (1963-12-01), Tyrrell et al.
patent: 3258117 (1966-06-01), Domeck, Jr. et al.
patent: 3564902 (1971-02-01), Heitmann
patent: 3769832 (1973-11-01), Baier
patent: 3889523 (1975-06-01), Nolte

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