the upper activity lip 108 to move freely without fiber suspension leaks the discharge end of the upper activity lip has a profile designed to create activity in the fiber suspension and which is able to orient high concentration of fibers it also allows obtaining a paper of lower density the profile is comprised of a inclined part 136 and a straight part 135 that make a change in the speed in the flow of the fiber suspension both horizontally and vertically the activity profile is spaced widthwise of the head box by means of sectors 137 illustrated in fig4 b keeping the same thickness of the upper activity lip the upper activity lip internally generated hydraulic pattern produces cross flows over the forming table at the time the fiber suspension leaves the head box this causes the fiber orientation to be improved transversely that is the fiber orientation ratio in the machine direction to the transversa fiber orientation decreases in this way the values of the physical properties of the paper in the transversal sense tend to be similar to those in the machine sense as shown in fig5 a shower 131 keeps the cylinder mold 32 clean there is also second shower 132 to keep the guide roll 51 clean the formation fabric 72 is kept clean by means of a high pressure shower 133 to collect the drained water in the unit there are a series of trays 127 128 129 and 126 collecting such water and driving it to an independent tank turning now to the embodiment of the invention shown in fig8 13 like parts to those previously described have been similarly numbered and designated.