guide surfaces 22 23 and 24 in a way so that the flow can be diverted without a break the depiction in fig8 shows a few examples whereby the pitch deviation opposite the radius of openings 15 and their edges cannot be recognized it must also be considered that a wear and tear zone 25 exists on the upper areas of refining edges 3 where possibly the flow caretaking measures would not be advantageous fig1 shows the section of a generally known refiner filling 2 which can be utilized on the rotor side when implementing the method it contains a plurality of refiner bars 7 between which grooves 26 are located for the transport of suspension s from infeed side 5 to outlet side 6 refiner bars 7 are often combined into groups where they are positioned parallel to each other in a favorable fabrication this would allow for a large number of refiner bars located at a selectable angle of intersection with the radius as shown in fig3 the shape of openings 15 which are located between the refining edges can be slotted at an angle to the radius or precisely in radial direction fig1 shows examples of additional forms such as round holes or polygons squares variations in placement and size of openings 15 provide possibilities to influence the distribution of the return flow of the suspension for.