A printing device comprising at least one printing nozzle configured to eject a flowable material through at least one ejection opening in a direction of a work surface,
- wherein the printing nozzle has a stationary printing nozzle frame, the printing nozzle frame comprising an outlet opening and
- a printing nozzle head comprising the ejection opening, which printing nozzle head can be moved relative to the printing nozzle frame,
- wherein the printing nozzle is designed to move the printing nozzle head relative to the printing nozzle frame between
- an open position, in which a flow of the flowable material through the ejection opening is permitted and the flowable material is not permitted to flow through the outlet opening, and
- a closed position, in which a flow of the flowable material through the ejection opening is not permitted and the flowable material is permitted to flow through the outlet opening,
- by means of a drive,
- wherein the ejection opening of the printing nozzle head is spaced apart further from the work surface in the closed position than in the open position
- and wherein the printing nozzle frame has at least two upper sealing surfaces and two lower sealing surfaces and the printing nozzle head has at least two upper sealing surfaces and two lower sealing surfaces,
- wherein the at least two upper sealing surfaces of the printing nozzle frame and the at least two upper sealing surfaces of the printing nozzle head are formed opposite one another to form an upper pair,
- wherein the at least two lower sealing surfaces of the printing nozzle frame and the at least two lower sealing surfaces of the printing nozzle head are formed opposite one another to form a lower pair, such that,
- in the open position,
- the at least two lower sealing surfaces of the printing nozzle frame and the at least two lower sealing surfaces of the printing nozzle head are spaced apart from one another and form a transition region therebetween through which the flowable material is permitted to flow toward the ejection opening, and
- the at least two upper sealing surfaces of the printing nozzle frame and the at least two upper sealing surfaces of the printing nozzle head form a seal together so that the flowable material is not permitted to flow toward the outlet opening,
- and, in the closed position,
- the at least two lower sealing surfaces of the printing nozzle frame and the at least two lower sealing surfaces of the printing nozzle head form a seal together so that the flowable material is not permitted to flow toward the ejection opening, and
- the at least two upper sealing surfaces of the printing nozzle frame and the at least two upper sealing surfaces of the printing nozzle head are spaced apart from one another and form a transition region therebetween, through which the flowable material is permitted to flow toward the outlet opening.