Optical method for examining the open end of a cigarette to dete

Details Optical method for examining the open end of a cigarette to dete Optical method for examining the open end of a cigarette to dete

1994-06-27

1997-01-21

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055945, G01V 904

Patent

active

055961878

ABSTRACT:
The filling of a cigarette is controlled by detecting a brightness curve of at least one part of the open end of the cigarette, processing the resulting brightness curve to obtain a contrast index, and comparing the resulting contrast index with an equivalent index of a correctly filled cigarette to obtain a signal indicating acceptance of the cigarette under observation.

REFERENCES:
patent: 3812349 (1974-05-01), Gugliotta
patent: 3980567 (1976-09-01), Benini
patent: 5013905 (1991-05-01), Neri
patent: 5223915 (1993-06-01), Neri
patent: 5235649 (1993-08-01), Reda

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