Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1977-11-18
1979-05-15
Gorenstein, Charles
Measuring and testing
With fluid pressure
Porosity or permeability
73 41, 73 451, G01N 1508
Patent
active
041540905
ABSTRACT:
The wrappers of filter cigarettes wherein wrapper portions surrounding the filter mouthpieces have holes for admission of atmospheric air into the column of tobacco smoke are tested during sidewise movement at the periphery of a rotary drum. A first testing device establishes a first pressure differential between the interior and exterior of successive wrappers, and a second testing device establishes a second pressure differential between the interior and exterior of those wrapper portions which surround tobacco as well as a different third pressure differential between those wrapper portions which surround the filter material. An evaluating circuit has two electropneumatic transducers which furnish first and second signals respectively denoting the pressure differential between the interior and exterior of successive wrappers and the pressure differential between the interior and exterior of successive wrapper portions which surround tobacco. A subtracting circuit furnishes third signals which denote the difference between the first and second signals. The first and third signals are compared with reference signals which respectively denote maximum permissible permeability of wrappers and minimum acceptable permeability of successive wrapper portions surrounding the filter material. Cigarettes wherein the permeability of wrappers is outside of the range between the maximum permissible and minimum acceptable permeability are segregated from acceptable cigarettes.
REFERENCES:
patent: 3395570 (1968-08-01), Kochalski
patent: 3690149 (1972-09-01), Pezzi
patent: 3991605 (1976-11-01), Reuland
patent: 4018081 (1977-04-01), Loxham
Dahlgrun Rolf
Heitmann Uwe
Lorenzen Heinz-Christen
Wahle Gunter
Gorenstein Charles
Hauni-Werke Korber & Co. KG
Kontler Peter K.
LandOfFree
Process and apparatus for multiple testing of wrappers of cigare does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for multiple testing of wrappers of cigare, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for multiple testing of wrappers of cigare will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1091722