Permeability meters

Details Permeability meters Permeability meters

1978-06-26

1980-03-04

Ciarlante, Anthony V.

Measuring and testing

With fluid pressure

Porosity or permeability

G01N 1508

Patent

active

041910460

ABSTRACT:
An instrument for measuring the air permeability of cigarette paper, including a paper-clamping head arranged to expose a fixed area of paper to a flow of pressurized air from an air pump. A manometer is arranged to measure the pressure differential across the paper and the gas flow is controllable by a control valve to enable a predetermined pressure differential to be maintained. The flow rate through the paper is measured by one of three flowmeters arranged in three parallel gas supply passages for measuring the flow rate in a low medium and high flow rate range respectively. The paper clamping head is such that the flow impedance downstream of the tapping point of the pressure transducer is negligible.

REFERENCES:
patent: 2521079 (1950-09-01), Morris
patent: 2861451 (1958-11-01), Emmons
patent: 3524341 (1970-08-01), Roy
patent: 3548634 (1970-12-01), Roy

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