cells 9 with predetermined quantities of cereals to the compacting station 4 in view of the fact that all of the rows of cells 9 are identical both structurally and functionally the following description refers to a single row of cells as they pass through the compacting station 4 the cereals in each individual cell 9 are subjected step by step to the action of the pressure elements 32 of the four rows of pressure elements of the station essentially the cereals are subjected to a plurality four of successive pressure pulses with intervals in which the pressure is released it should be noted that the pressure exerted by the individual rows of pressure elements 32 can be varied at will from row to row simply by varying the positions of the pressure elements 32 inside the respective seats 44 for example and in particular whereas the pressure elements of the bars rows 33 and 34 exert the same pressure the pressure elements of the bar 34 are positioned in the respective seats in a manner such as to exert a greater pressure and the pressure exerted by the pressure elements of the bar 36 will be further increased it is thus possible to cancel out the effect of the so called 34 elastic memory 34 of the cereal flakes that is the tendency of the aggregate produced to go back to the volume which it had initially inside the respective cell the pause with the drum 2 stationary between one compression and the next also.