CURTAIN COATER WITH A POROUS CURTAIN GUIDE STRUCTURE, CURTAIN GUIDE STRUCTURE FOR A CURTAIN COATER AND METHOD OF PRODUCING THE CURTAIN GUIDE STRUCTURE

摘要

The invention relates to a curtain coating device for coating a substrate (1), comprising: a) a nozzle device (4) for the generation of a curtain (V) of at least one coating fluid, falling on the substrate (1); b) a porous curtain guide structure (10) which has a guide surface (11) for the lateral guidance of the curtain (V), which guide surface is curved in a convex round manner along a width (B), exceeding the thickness of the curtain (V), measured crosswise to the curtain (V); c) at least one cavity (24) extended in the longitudinal direction of the curtain guide structure (10) for an auxiliary fluid to be guided on the guide surface (11); d) and a cavity wall surrounding the cavity (24), of which cavity wall the curtain guide structure (10) forms only a circumferential segment (14); e) the circumferential segment (14) delimiting the cavity (24) being part of an outer contour (11-14) of the curtain guide structure (10) around a longitudinal axis (L) of the curtain structure (10).