The device, method and machine for producing a filter rod of the tobacco-processing industry

The invention relates to an apparatus for producing a filter rod of the tobacco processing industry, comprising a pressurizable air transport nozzle (12), a guide tube (18) having a guide tube (18) disposed longitudinally extended mandrel (19), said direct output of the transport jet (12 a freely rotatable, non-driven feed roller (16)) and at a distance to the mandrel (19) arranged in the tread (17) sections, the conveying path of the strip of filter material defining a corresponding filter rod-making machine and a corresponding method. In the inventive device a guide channel (100, 100 '), the output of the transport jet (12) whose cross section is on the input side in the conveying direction of the filter rod adapted to a cross section of the transport nozzle (12) and on the output side is substantially rectangular, wherein the cross section at a outlet (104) of the guide channel (100, 100 ') is tapered in the vertical direction, wherein at or in the region of an upper surface of the guide channel (100, 100' is formed) at least one shaping element (110, 120) and arranged around the filter rod at einzuwolben conveying it to contact the top of the filter rod and concave.