Method and apparatus for testing cigarettes or the like

Details Method and apparatus for testing cigarettes or the like Method and apparatus for testing cigarettes or the like

1979-09-11

1981-07-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

209535, G01V 904

Patent

active

042776783

ABSTRACT:
Filter cigarettes of double unit length are tested in the filter tipping machine in a selected portion of their normal path of sidewise movement toward the discharge end of the machine. In such selected portion, successive filter cigarettes are arrested and simultaneously rotated about their respective axes. During rotation, a first optoelectrical unit scans the wrappers of the cigarettes for the presence of protuberances, and a second optoelectrical unit scans the wrappers for the presence of open seams, holes, frayed ends and/or smudges. On detection of defects, the transducers of the respective units generate signals which are used to segregate the respective cigarettes from other cigarettes.

REFERENCES:
patent: 3456787 (1969-07-01), Pinkham et al.
patent: 3662880 (1972-05-01), Kochalski et al.
patent: 3989567 (1976-09-01), Benini

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