Method and apparatus for testing the wrappers of cigarettes, fil

Details Method and apparatus for testing the wrappers of cigarettes, fil Method and apparatus for testing the wrappers of cigarettes, fil

1975-09-08

1978-10-17

Swisher, S. Clement

Measuring and testing

With fluid pressure

Leakage

G01M 332

Patent

active

041201949

ABSTRACT:
Pneumatic test signals are generated indicative of the extent to which seal imperfections are present in the wrappers of rod-shaped articles, and the pneumatic test signals are converted into electrical test signals. A pneumatic comparison signal is generated and converted into an electrical comparison signal. Signals dependent upon the difference between the electrical comparison and test signals are derived from the electrical comparison and test signals. The determination of whether the wrappers are defective or non-defective includes comparing the derived signals against a reference value.

REFERENCES:
patent: 3030853 (1962-04-01), Strother
patent: 3070988 (1963-01-01), Kapff et al.
patent: 3412856 (1968-11-01), Esenwein
patent: 3418844 (1968-12-01), Wahle
patent: 3464549 (1969-09-01), Armbruster
patent: 3611790 (1971-10-01), Brouwer et al.
patent: 3689748 (1972-09-01), Bothne
patent: 3690149 (1972-09-01), Pezzi
patent: 3781652 (1973-12-01), Weaver
patent: 3862408 (1975-01-01), Bolt
patent: 3991605 (1976-11-01), Reuland

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