Suction nozzle

The suction jet (1) has a suction tube (2) and a flow channel (3) with a narrow part (4) in the vicinity of one end of the suction tube. The flow channel is curved or in an arc shape in specific regions. The flow channel may be at an angle to the suction tube in the inflow region. The flow channel may run in a radial direction relative to the suction tube in its inflow region.