contact with the formation plastic fabric the peripheral speed of the roll is lower to that of the formation fabric allowing injection of water from the lower part of the fabric to the upper part where the fiber suspension is creating thus a rearrangement of the fibers the breast roll 97 shown in fig3 rotates over bearings located in a journal bearing 98 which is attached to the main structure 35 by means of screws 99 and 100 adjustment of the position of the breast roll is carried out with a spindle 91 by means of nuts 95 and 96 the spindle 91 is attached to a structure 88 which also supports the base of the formation knives 86 this base is attached to the structure 88 by means of a screw 87 the position of the base of the formation knives against breast rolls is adjusted by means of a spindle 92 and retaining nuts 93 and 94 the structure 88 is attached to the main structure 35 by means of screws 89 and 90 the structure of the formation knives holds the formation knife 84 by means of t shaped sliders 85 a plastic knife 103 is provided to keep clean the breast roll 97 the plastic knife 103 plays.