Method and an apparatus for coating a material web by means of a slot nozzle

Abstract

The invention relates to a method for coating a material web by means of a slot nozzle, wherein, during the transport of the material web in a transport direction, coating material exits via a slot of the slot nozzle and is thereby applied to the material web, wherein the slot has a coating width which extends perpendicularly to the transport direction along the material web, wherein the volume flow of the coating material passing through the slot can be variably adjusted along the coating width by means of an adjustment means. The method according to the invention is characterized in that, during the coating of the material web, pressure measurements are carried out, where in each pressure measurement, by means of a pressure sensor system, the pressure of the coating material in the slot of the slot nozzle is measured at a plurality of measurement positions along the coating width, thus obtaining pressure values for the plurality of measurement positions.

Dependencies are inferred from the claim text.