Patent ID: 6800868
Filing Date: 2004-10-05
Classification: B65H

Abstract:
A discriminating device for discriminating between two kinds of objects of determination, which have different surface reflectivities, said device comprising:a first optical sensor having a light receiving portion which receives light reflected by surfaces of the objects of determination, said first optical sensor reacting to reflected light from both two kinds of objects of determination individually; and a second optical sensor having a light receiving portion which receives the reflected light, said second optical sensor being provided so as to react to reflected light from one of the objects of determination, of which surface reflectivity is higher, and so as not to react to reflected light from the other object of determination of which surface reflectivity is lower; wherein the reflected light incident upon the light receiving portion of the first optical sensor is substantially perpendicular to a surface of the light receiving portion of the first optical sensor that receives the reflected light, and the reflected light incident upon the light receiving portion of the second optical sensor is oblique to a surface of the light receiving portion of the second optical sensor that receives the reflected light.