Testing ventilated cigarettes

Details Testing ventilated cigarettes Testing ventilated cigarettes

1979-08-29

1981-07-21

Goldberg, Gerald

Measuring and testing

With fluid pressure

Porosity or permeability

73 41, G01N 1508

Patent

active

042791448

ABSTRACT:
Cigarette testing system for cigarettes having perforations 6 in the filter in which the cigarette 2 is surrounded by a suction chamber 8 and the tobacco end is connected to a source of pressurized air. The pressure at the tobacco end is regulated in accordance with the average signal from a transducer 10 at the filter end so as to maintain zero average pressure at the filter end, i.e. so that the air flow into the cigarette from the tobacco end exactly balances the outflow through the perforations. The tobacco end pressure is monitored as a measure of the average dilution level of the cigarettes and the deviations from zero pressure at the filter end can be used as individual cigarette test signals.

REFERENCES:
patent: 4127025 (1978-11-01), Mills et al.
patent: 4154090 (1979-05-01), Heitmann et al.
patent: 4171635 (1979-10-01), Calleson et al.
patent: 4177670 (1979-12-01), Heitmann et al.

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