Roller for a coating device for direct or indirect coating of liquid or pasty medium on moving paper or cardboard, comprises roller cover made of fiber composite material, cover arranged on the roller cover, and/or a power supply element

The roller comprises a roller cover (2) made of fiber composite material, a cover (3) arranged on the roller cover, and/or a power supply element (4) having a bearing pin (11). In the area of the power supply device, reinforcing covers (13) are equipped, which are arranged between the power supply element and the roller cover. A mass ratio of the mass of the non-metallic portion of the roller to mass of the metallic portion of the roller is 2.3. The mass ratio of the mass of the roller cover to mass of the cover is 2.3. The roller comprises a roller cover (2) made of fiber composite material, a cover (3) arranged on the roller cover, and/or a power supply element (4) having a bearing pin (11). In the area of the power supply device, reinforcing covers (13) are equipped, which are arranged between the power supply element and the roller cover. A mass ratio of the mass of the non-metallic portion of the roller to mass of the metallic portion of the roller is 2.3. The mass ratio of the mass of the roller cover to mass of the cover is 2.3. The mass ratio of the sum of the mass of the roller cover and the cover to mass of the power supply element is 2.3. The mass ratio of the mass of the power supply element to mass of the bearing pin is 1.65. The reinforcing cover comprises stiffness in the circumference that is greater than the stiffness of the roller cover, and a bevel. In the roller cover, a strengthening ring with high stiffness is equipped on which balancing weights are ordered. The roller cover is constructed from epoxide resin with glass or carbon fiber and/or aramide fiber. The cover is made of rubber, polyurethane or fiber reinforced plastic material. The roller cover is equipped with a ceramic- or hard metal coating. The power supply elements are formed in lightweight construction in drum shaped manner and comprise a hollow cylindrical external tube in which a hollow cylindrical interior tube is arranged. The external and internal tubes are connected with one another through welding. The cover comprises a recess. In the interior tube, the bearing pins are pluggable, which are connected through welding, shrinking or other suitable connection type with the interior tube. The balancing weights are subjected in the power supply element. An axial length of the roller is greater than 6 m. An independent claim is included for a method for balancing a roller. Eine Walze (1) für eine Auftragseinrichtung zum direkten oder indirekten Auftragen eines flüssigen o