Patent ID: 6565076
Filing Date: 2003-05-20
Classification: B42C,B65H

Abstract:
A stapler unit comprising:a head part for driving a staple into a sheet bundle; an anvil part situated adjacent to the head part to receive and bend the staple driven by the head part; a holding station for placing the sheet bundle thereupon between the head part and the anvil part; first moving means for moving at least one of the head part and the anvil part toward the other to nip the sheet bundle placed on the holding station between the head part and the anvil part; second moving means for relatively moving the head part, the anvil part and the sheet bundle along surfaces of the sheet bundle placed on the holding station, said surfaces facing the head part and the anvil part; gap detecting means for detecting a gap between the head part and the anvil part; and inoperating means electrically connected to the gap detecting means and the second moving means for making the second moving means inoperable according to a detection result of the gap detecting means.