Abstract: Device comprising a housing having one side on which at least two support feet with support surfaces are provided, wherein the support feet project beyond the surface forming the side, thereby creating a free space between the surface forming the side and the plane in which the support surface coming closest to the surface is located, wherein the device has a drivable shaft that extends through an opening in the housing from outside into the housing, wherein a fan wheel is disposed on that section of the shaft located outside the housing, the fan wheel generating an air flow when the shaft rotates that passes over the surface forming the side, and a cover is attached to the support feet so as to create a free space that is delimited by the cover and the surface forming the side and through which at least part of the air flow generated by the fan wheel can pass.

Abstract: A knife coater for the application of one or more magnetizable dispersions located one on top of the other to a moving flexible substrate by means of a plurality of coater slots which are arranged essentially horizontally and parallel to one another in a multipart block and are fed from reservoirs is described, the outlet orifices of the coater slots being essentially opposite the summit of a concave support surface for the substrate, the substrate transporting the applied layers, the outlet surfaces of the coater block which are opposite the support surface being adapted to the radius of the roll and the inflow gap being larger than the outflow gap.