which leads approximately radially to the concave inside face of the application bar 4 and there connects to one of the feed ducts 13 which are evenly supplied with liquid treatment medium for example liquid dye by a distributor during operation of the device 10 the treatment medium is supplied via the feed ducts 13 the connecting channels 12 and the feed channels 9 to the slot at sites distributed over its entire length supply takes place at right angles to the slot 8 such that the treatment medium before flowing out of the slot 8 into the web 1 can be diverted and thereby made more uniform the flow width can be adjusted to the width of the web 1 by sliding the element 26 which fills the cross section of slot 8 and seals it to the outside on the side of the web 1 opposing the slot 8 a resilient pressing element 20 is provided the resilient pressing element 20 comprises an oblong cushion 15 provided in the center region of the web 1 that extends transverse to the web as well as further cushions 16 17 18 arranged next to each other i e in the adjoining edge regions each cushion 15 16 17 18 has in a manner clearly evident in fig2 its own connection and can accordingly be provided with its own individual internal pressure by having a fluid medium pumped into it for example compressed air the resilient support element 20 is located on the side facing away from the web 1 between the resilient pressing element.