Loose end detector for tobacco articles

Details Loose end detector for tobacco articles Loose end detector for tobacco articles

1992-01-28

1998-04-07

Gregory, Bernarr E.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324686, G01R 2726

Patent

active

H00017191

ABSTRACT:
A device for detecting loose ends in tobacco articles such as cigarettes comprises a stationary cam for positioning the articles prior to reaching a flat sensor surface. A pair of concentric electrodes are arranged on the sensor surface for generating an electric field. Cigarettes are moved through the field so as to create a field disturbance. Deviations from a predetermined field disturbance indicate that a cigarette is defective. A piece of thin glass, of about 5.5 mils, covers the sensor surface and is adhered thereto to protect against wear. Compared to surface protecting members previously used, the glass member significantly extends the wear life of the sensor, improves the sensitivity of the device, improves detection accuracy, and eliminates the need for daily readjustment of the field.

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patent: 3993194 (1976-11-01), Reuland
patent: 4021897 (1977-05-01), Fisli
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patent: 4877475 (1989-10-01), Uchida et al.
patent: 5034083 (1991-07-01), Campanelli et al.
patent: 5121068 (1992-06-01), Baker
patent: 5137770 (1992-08-01), Rothe et al.

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