Method and apparatus for detecting filing state at an open end o

Details Method and apparatus for detecting filing state at an open end o Method and apparatus for detecting filing state at an open end o

1994-07-11

1996-10-29

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

2505594, 358237, G01N 2186

Patent

active

055699316

ABSTRACT:
The filling of a cigarette under observation is controlled by intersecting the open-end surface of the cigarette with at least one coherent light blade emitted by at least one laser source, to form a respective real light trace, and by analyzing any deviation or discontinuity of the real trace in relation to a theoretical, straight, continuous trace formed by joining two end points of the real trace, to obtain a signal indicating acceptance or rejection of the cigarette under observation.

REFERENCES:
patent: 4644176 (1987-02-01), Heitmann et al.
patent: 5223915 (1993-06-01), Neri

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