Wide-slot nozzle

A device for applying a flowable medium onto a level workpiece surface, including a housing forming an elongated outlet nozzle for the medium and an essentially cylindrical media distributor which is rotatably arranged in the housing and includes a slot that changes its position relative to the outlet nozzle by rotating the media distributor and whose outer surface forms sealing surfaces which rest sealingly against sealing surfaces of the housing. In order to develop the device such that low- to medium-viscosity media can be applied with a closed surface onto a level workpiece surface, the media distributor is a pipe whose interior is formed by a reservoir that can be fed with the medium via a feed opening and that the slot extends in such a manner that, by rotation of the media distributor, it can be brought from an open position, in which it forms an open, continuous opening essentially over its entire length from the reservoir to the outlet nozzle, to a closed position in which the continuous opening is completely closed.