slide shoe 22 the curved surface of the slide shoe 22 which is contacted by the flow of pulp can advantageously be developed in the following manner within the region of the outlet opening 21 it is flat or it is only slightly curved with a very large radius of curvature k adjoining this downstream is a region of relatively sharper curvature with a radius of curvature r following this is a region with a lesser curvature with a radius of curvature r smaller than radius k but larger than the radius r in fig2 there is a sharp run off edge 50 on the slide shoe 22 there is a tangent t which can be drawn to the curved surface of the slide surface at the run off edge 50 the wire belt 10 is preferably guided to form an angle a of about 0 5 u00b0 to 5 u00b0 with the tangent t measured with the machine being stationary and the wire belt 10 being taut in fig1 the head box 15 is arranged vertically with its outlet opening 21 located at the bottom however any other position or orientation of the head box is also possible fig3 shows the wire end of a paper making machine having two head boxes the first head box 15a is arranged horizontally while the.