Cigarette ends testing

Details Cigarette ends testing Cigarette ends testing

1987-07-30

1990-07-31

Millin, V.

Tobacco

Cigar or cigarette making

131908, 250223R, 209536, 209546, 356445, A24C 532, A24C 534

Patent

active

049443143

ABSTRACT:
A cigarette ends tester includes a conveyor for conveying cigarettes sideways past a source of light arranged to direct light substantially axially into the ends of successive cigarettes in such a way that the paper wrapper around the end of each cigarette is illuminated if there is insufficient tobacco in the end, and a detecting device for monitoring the consequent external illumination of the end of the cigarette. The test signal for each cigarette is evaluated against a reference signal derived from satisfactory cigarettes tested previously during a predetermined time interval, thus compensating for variable factors affecting the test signal, such as ageing or dirt on the light emitting or detecting devices.

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patent: 4645921 (1987-02-01), Heitmann et al.
patent: 4678901 (1987-07-01), Focke et al.
patent: 4712914 (1987-12-01), Cross et al.
patent: 4805641 (1989-02-01), Radzio et al.

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