Method and device for the electropneumatic testing of cigarette

Details Method and device for the electropneumatic testing of cigarette Method and device for the electropneumatic testing of cigarette

1981-01-22

1983-09-13

Stephan, Steven L.

Measuring and testing

With fluid pressure

Porosity or permeability

73 452, G01N 1508

Patent

active

044035012

ABSTRACT:
A method and device for the electropneumatic testing of the air permeability of filter plugs for filter cigarettes. At one end of the filter plug there is applied a pneumatic pressure, the other end of the filter cigarette being connected, through a bore with the atmosphere. The pneumatic pressure applied at the inlet end of the cigarette plug is transformed into an electric test signal, and the signal is compared with an upper alarm threshold and with a higher upper reject threshold respectively, as well as with a lower alarm threshold and an inferior lower reject threshold. The test signal emitted upon reaching of the upper or lower alarm threshold initiates the operation of alarm indicators and/or sends a signal for the control of the filter plug producing machine, so as to modify the air permeability of the filter plugs. Upon reaching the upper or lower reject threshold, it causes rejection of the defective filter plugs.

REFERENCES:
patent: 3412856 (1968-11-01), Esenwein
patent: 3690149 (1972-09-01), Pezzi
patent: 4120194 (1978-10-01), Reuland
patent: 4223551 (1980-09-01), Greve et al.
patent: 4227397 (1980-10-01), Neri
patent: 4287754 (1981-09-01), Heitmann et al.
patent: 4325250 (1982-04-01), Bolt et al.

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