Device for curtain coating of material web, has nozzle arranged above material web and extended transverse to web running direction, where coating color discharges from nozzle on free falling curtain

摘要

The device has a nozzle (13) arranged above a material web and extended transverse to web running direction, where the coating color discharges from the nozzle on a free falling curtain (6). An edge guide for the curtain has a banding (2) for each of the both edges of the curtain. The curtain has a suction device (4) with a suction channel (10) which ends in the area of a lower end of each banding in an intake opening (9) for the intake of the working fluid (3). A liquid foam is induced with an additive to the cleaning agent or esters of fatty acids as fluid.