Patent ID: 6484921
Filing Date: 2002-11-26
Classification: B27F

Abstract:
A stapler comprising:a driving out portion from which a staple is driven out; a table which forwardly and backwardly reciprocates; and a clincher which is disposed on said table so as to put and hold a pile of sheets to be bundled between itself and said driving out portion when said table forwardly moves and at the same time a staple is driven out from the driving out portion against the pile of sheets, and to clinch the front end portions of the staple which penetrate through the pile of sheets, said stapler characterized in that, a photo sensor is disposed in the other side of said table opposite to said driving out portion; and one or more through holes are arranged in said table in order to guide the emitted light beam from a light emission portion of said photo sensor to the pile of sheets and to guide the reflected light beam from a surface of the pile of sheets to a light receiving portion of said photo sensor.