voltage of the drops as a function of time for each of the two adjacent nozzles referred to n and n 1 in this diagram we see that charge voltage increases with plateaus for a period u03b8 39 during the period t 2 t 1 u03b8 for one of the jets and t 2 t 3 u03b8 for the other jet these two periods u03b8 are equal this result is obtained following a sequencing logic shown in fig8 the signal s 1 at starting time t 1 for the printing sequence is sent into the printing sequencing c n logical circuit corresponding to the jet emitted by the nozzle n when a raster has finished being printed by n the signal s 2 at time t 2 triggers the printing sequencing c n 1 logical circuit controlling the jet of the nozzle n 1 until the end of printing of the corresponding raster t 3 in a third feature of the invention the printing head must be directed around an axis oz perpendicular to the plane of the support to be printed on x o y so as to make up for the possible incline u03b1 of the raster on the axis y which is the result of combining a relative passing speed v for the support with sending a series of successive drops to print the raster during the period u03b8 these parameters are bound by the relation in fig9 we see the combination of the drops flying in the plane of deflection of the two nozzles n and n 1 the plane of the support x o y and the high h raster produced t on the support travelling at speed v the invention can be applied in ink jet marking techniques.