the invention contemplates mechanism for ejecting incomplete fascicles which are astride a transport rail and are carried along by driver means moving in the lengthwise direction of this transport rail . the ejector mechanism has a guide rail which starts at an offset from the transport rail that is greater than the thickness of complete fascicles and which extends from this starting end upward and to the side at an acute angle to the direction of movement of the fascicles moving along the transport rail ; the upward slope peaks at a highest point , the location of which is selected such that incomplete fascicles leave the active region of the driver means only after the center of gravity of the fascicle has passed the highest point of the guide rail . from this point to its end , the guide rail has a downward slope which is sufficient to promote gravitational movement of the incomplete fascicles , on their own , to the discharge end of the guide rail . a switch tongue is movable between a first position in which it forms a guide path for the incomplete fascicles from the transport rail to the starting end of the guide rail and a second position in which it permits the transport of complete fascicles through the intermediate space between the transport rail and the starting end of the guide rail .