Patent ID: 6048582
Filing Date: 2000-04-11
Classification: B05C,B05D,G03C,Y10S

Abstract:
In a method for coating a moving support with a liquid curtain of coating material in which the curtain extends between two lateral guides and has a width greater than a width to be coated on the support, the improvement comprising:providing two lateral guides for guiding the curtain, wherein one guide is provided on each side of the curtain, and wherein each guide is configured to supply a liquid film down the length of the respective lateral guide, and each guide includes a porous plate having a length and a width, with each porous plate being disposed between two longitudinally extending border plates so as to form a channel extending down the length of the curtain, and through which said liquid film flow is supplied andsupplying a flow of a liquid film to the channel and through the porous plate at each side of the curtain to form a liquid film on the curtain side of the plate, the liquid film flow being supplied along a width perpendicular to the width of the curtain and along the length of the porous plate, wherein the porous plate varies in thickness along its length so that the surface velocity of the liquid film flow on the curtain side of the plate is equal to the falling velocity of the curtain along substantially the entire length of the lateral guides.