and interposed grooves and are located either on a rotor or a stator the refiner fillings are caused to be rotatably moved relative to each other and pressed against each other thereby transmitting mechanical a refining action to the cellulose fibers the refiner fillings include barriers in at least part of the grooves the barriers closing the grooves at least partially application_number US 201113109307 A description referring now to the drawings and more particularly to fig1 there is shown that the method according to the present invention may be implemented in a refining device which is schematically illustrated in a cross sectional view a set of refiner fillings 1 is mounted on stator 8 and a set of refiner fillings 2 is mounted on rotor 9 detachable by means of screws 12 refiner fillings 1 and 2 are blade fillings which are equipped with refining strips 6 a top view of which can be seen for example in fig2 and 3 in the illustrated example suspension s which is to be refined passes through the center of stator 8 into refiner fillings 1 and 2 this illustration strongly exaggerates the axial distance that refiner fillings 1 and 2 are located from each other in actual operation it amounts to only a fraction of millimeters suspension.