Patent ID: 8179410
Filing Date: 2012-05-15
Classification: B65H

Abstract:
1. A method for adjusting a paper sheet sensor which optically detects a paper sheet using a light emitting element and a light receiving element, the method comprising: in a state where the paper sheet exists between the light emitting element and the light receiving element, gradually increasing an operating current I of the light emitting element; when an output voltage V of the light receiving element reaches a light receiving level Vx during the increase in the operating current I, storing the operating current I at the time as I storing, as V in a state where the paper sheet does not exist between the light emitting element and the light receiving element, gradually decreasing the operating current I of the light emitting element from the above I when the output voltage V of the light receiving element reaches a non-light receiving level Vy during the decrease in the operating current I, storing the operating current I at the time as I storing, as V setting the operating current I at the time of normal operation of the light emitting element within a range between the above I