facing the paper web 5 said teeth and gaps resulting in deposition of parallel strings or strangs of composition of defined cross section at the spaced locations by the metering lamella 15 thus providing for accurate dosage of coating composition the distance between the metering lamella 15 and the coating blade 7 is adapted so that these strands of coating composition 11 before entering the site of contact between coating blade 7 and paper web 5 merge to form a dam 23 resulting in even deposition of coating composition across the whole width of the paper web 5 thanks to the construction and function of the apparatus described the previously indicated problems of maintaining constancy will be eliminated and there is obtained a constant deposition quantity across the web even for example for varying web speed vicosity of coating agent blade angle etc in fig2 there is shown an alternative embodiment of the apparatus according to the invention in this figure there is shown only the area around the metering device whereas other details in connection with recirculation of the coating composition the position and arrangement of the coating blade etc are left out the apparatus of fig2 includes a metering device in the form of a metering rod 31 which runs freely mounted in a rod holder 33 the metering rod 31 is rotatively mounted in said rod holder 33 as is.