Abstract: An electromotive stapler according is provided with a paper holder, which is linked with a striking block, to press the neighborhood of the place where the staple is driven, whereby binding of many sheets of paper is possible without consuming much power of the motor, the pressing force of the paper holder being obtained by motion of push rod to press the paper holder, and the force of push rod necessary therefor being obtained by a coil spring compressed by the motion of the striking block.

Abstract: A stapler comprising a striking block having a staple striking blade for striking staples on its end; a motor for causing reciprocating motion of the staple striking block over a range from the staple striking position to a stopping position apart from the staple; a switch that is provided at the location of movement of the striking block, and is turned on and off by the motion of the striking block; and a control circuit which reverses the driving direction of the driving means, moves the striking block to the stopping position, and turns off the switching means, in case the switching means is not turned off within a predetermined time after the switching means is turned on by the motion of the striking block.