thicknesses the nozzle 38 contains a comb type plate which produces individual threads which extend perpendicularly relative to the direction of movement of the length of material 42 and which immediately after having emerged converge to form the spray veil 39 as can be seen in fig2 b the cylinder slide 33 at its cylindrical surface comprises a surface groove 47 which in a developed view has the approximate shape of a circle furthermore as can be seen in the cross sectional view shown in fig2 c the surface groove 47 is supplied with medium via radial bores 48 from an inner cavity 49 the cavity 49 in turn is supplied with medium via supply sleeves 36 annular grooves 45 and radial bores 46 in the cylinder slide 33 the annular groove 45 is sealed by shaft seals relative to the region of the cylinder slide which is provided with surface grooves 47 the surface groove 47 is constantly filled with medium via the radial bores 48 as can also be seen in the cross sectional view the cylinder slide 33 runs in a cylindrical slide chamber 40 of the housing 32 from which cylinder chamber 40 radial bores 50 in the housing 32 lead to the nozzle 38 as illustrated in fig2 d a comb type plate 51 in the nozzle 38 is provided with webs 52 so that each of the radial bores 50 is permanently openly connected to one of the exit apertures 53 positioned between the prongs 53 of the comb type plate fig3 and 4 each show a an application head with a length of material comprising an application pattern in a perspective view and b the cylinder slide in the form of a.