Device and method for treating fibres

A device for treating fibres of a mixture of substances containing fibres, the device comprising:

• at least one outlet element for the passage of the mixture of substances containing fibres with an outlet opening and at least one first refining surface arranged around the outlet opening in a circumferential direction,
• at least one feeding device for positioning the outlet element;
• and
• for treating the mixture of substances containing fibres, a movable treatment body comprising a second refining surface is arranged opposite relative to the at least one outlet element, wherein, during the passage of the mixture of substances containing fibres through the outlet element, a gap-type treatment zone is formed between the first refining surface of the outlet element and a sub-surface of the second refining surface of the movable treatment body, which is applied with the mixture of substances;
• wherein at least the first refining surface has at least one blade;
• wherein the at least one blade of the first refining surface has a refining edge that is continuous around the outlet opening of the at least one outlet element.