Abstract: In the method for curtain coating a moving support with any kind of coating solution, the air which is carried along by the moving support is extracted in front of the curtain as seen in the running direction of the support in a gap which extends concentrically to the support, and air is continuously supplied in a controlled manner. In the process, the supplied air is regulated in function of the extracted air in such a manner that a parabolic velocity profile develops which comprises a point P at a distance d from the support where the air velocity is equal to zero. In the device implementing the method, this adjustment is essentially enabled by a porous layer which is disposed on the support side in a cavity to which a suction resp. an air supply channel is connected. In this manner, a uniform coating of high quality can be obtained.

Abstract: In the method for curtain coating a moving support with any kind of coating solution, lateral flow is supplied to the guided curtain on both sides transversely to the length of the curtain and in parallel to the front wall of the lateral guides. The supply of the liquid film on the lateral guide is effected in such a manner that its surface velocity is equal to the falling velocity of the curtain at any point along the lateral guide. The device implementing the method features a porous plate which is arranged between the liquid supply and the curtain side. This ensures a constant coating without any disturbances due to marginal influences.