draw hook due to an elastic deformation thereof the ring segment 68 lies during the movement of the draw hook always on a line against the repulsion knife 8 the stop rail 6 or during the control operation against both parts a reciprocal up and down movement can occur and also a relatively large swivel movement which results in a friction and thus causes wear this is a disadvantage in contrast to this there exists the advantage that the draw hook 65 remains at any time freely swingable which makes its movement easier in particular during reading in through a free gravity fall fig4 and 5 illustrate an inventive modification the baulk again consists of two plates 70 the ends of which are connected together through the bolt 77 the bearing end 79 of the draw hook 75 is supported freely rotatably on the bolt wherein the outside circumference of the bearing end extends radially beyond the baulk plates and the bearing end rests against the repulsion knife 8 and the stop rail 6 due to this direct abutment the position of the axis of the bore in the bearing end 79 and the axis of the bolt 77 in the baulk end may have a relatively large inexactness without interfering with the function of the draw hooks 75 the swinging baulk 70 is classically supported by the bolt 77 in the bearing end 79 and is only yet indirectly connected to the stop rail 6 and the repulsion knife 8 since only an extremely small relative movement remains between the bearing end and the stop rail and the repulsion knife hardly.