Patent ID: 7861666

Claim:
An apparatus for applying fluid onto a substrate moving relative to said apparatus, comprising: a basic body configured to be connected to a fluid source and including a distribution channel with a length that can be acted upon with the fluid, a piston positioned in said distribution channel, and a slit-shaped nozzle opening in fluid communication with said distribution channel, said piston being movable in said distribution channel so as to vary said length, said slit-shaped nozzle opening communicating with said distribution channel via a plurality of spaced apart outlet channels; an application valve coupled to said basic body for selectively interrupting or enabling a flow of the fluid through said basic body; a rotatable latching element; and a recess configured to receive said rotatable latching element therein at discrete angular positions of said rotatable latching element, said angular positions corresponding to a plurality of spaced, available stopping positions of said piston along said distribution channel.