Patent ID: 6926201

Claim:
A bank note processing machine in which bank notes placed on an insert tray are sequentially delivered one by one to a discrimination sensor section; the bank note types and the genuineness/falsehood of said bank notes being discriminated based on signals detected by a discrimination sensor at said discrimination sensor section; and said discriminated bank notes being subsequently sent to an accumulating section, said bank note processing machine comprising said discrimination sensor being formed by a light projecting section for irradiating through a slit area substantially over the entire passing width of said bank notes and a light receiving section constituted by a photodiode array; said light projecting section being formed by a light guide plate and at least one LED provided on an end face of said light guide plate; light from said LED being inputted to said light guide plate and an advance direction of entered light being changed into a perpendicular direction to a light axis of said light guide plate; light being uniformly emitted from a whole surface of said light guide plate irrespective of a distance from said LED; and said light projecting section and light receiving section being provided in a face-to-face relationship with a transport path of said bank notes sandwiched therebetween or provided in parallel on one side of said transport path.