Patent ID: 9013697
Filing Date: 2015-04-21
Classification: A24C,A24D,D21H,G01N

Abstract:
1. A band detection sensor for detecting bands arranged on one side of a web and spaced from each other in a longitudinal direction of the web, comprising: a light emitter arranged at a location along a travel path of the web and configured to radiate detection light onto the one side of the web; a light receiver arranged at a location along the travel path at a distance from the light emitter along the travel path, the light receiver being configured to receive the detection light reflected by the web and output a detection signal corresponding to intensity of the received detection light; and a band discriminator configured to discriminate the bands on the web on the basis of the detection signal from the light receiver, wherein the band discriminator includes a rise discriminating criterion indicating a rate of rise of the detection signal and generates a band signal indicative of presence of the band when change of the detection signal fulfills the rise discriminating criterion.