Wrapping paper defect inspection apparatus for a cigarette manuf

Details Wrapping paper defect inspection apparatus for a cigarette manuf Wrapping paper defect inspection apparatus for a cigarette manuf

1998-08-17

2000-10-10

Lee, John R

Radiant energy

Photocells; circuits and apparatus

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

25055915, 25055924, 25055927, 25055942, 131906, 131907, G01N 21894, A24C 5345

Patent

active

061304387

ABSTRACT:
A wrapping paper defect inspection apparatus for a cigarette manufacturing machine is provided which permits easy and reliable detection of a defect, such as a pinhole, in elongate wrapping paper continuously transported at high speed and which is suited for rejecting without fail cigarettes formed using a defective portion of the wrapping paper. Optical sensors are arranged at a transportation path of the wrapping paper for detecting transmission of light irradiated onto a region of the wrapping paper excluding the edge portions thereof, and a defect in the wrapping paper, such as a pinhole, is detected in accordance with whether or not the optical sensors have received light. Further, a pair of auxiliary optical sensors are provided for detecting transmission of light irradiated to regions including the respective edge portions of the wrapping paper, and based on the sum of amounts of light received by the auxiliary optical sensors, a defective or narrower portion of the wrapping paper than a prescribed width is detected. The result of defect detection is output in synchronism with the timing for wrapping shredded tobacco in the wrapping paper, to reject defective cigarettes.

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patent: 5476108 (1995-12-01), Dominguez et al.
patent: 5746225 (1998-05-01), Okumoto et al.
patent: 5944278 (1999-08-01), Stevens, III et al.

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