An apparatus for forming a smoke filter comprising: a forming nozzle through which a fibrous bundle material passes, the forming nozzle comprising a converging passage , at least one first internal cavity in fluid connection with a first working fluid source , and a plurality of first holes fluidly connecting the at least one first internal cavity with a working surface of the forming nozzle , the plurality of first holes further positioned and directed such that in passing through the plurality of first holes , the first working fluid conveys the fibrous bundle material through the forming nozzle in a transport direction; a guide pin disposed along a central axis of the converging passage , the guide pin comprising an elongated body which tapers in the transport direction, wherein the guide pin further comprises an excitation device, wherein the excitation device preferably is a vibration generator linked vibrationally to the guide pin , wherein the excitation device further preferably is a motor non-rotationally connected to the guide pin , wherein the excitation device even further preferably is a pneumatic self-alignment system; and a bobbin disposed downstream of the forming nozzle , the bobbin comprising a first passage through which the fibrous bundle material is conveyed, at least one second internal cavity in fluid connection with a second working fluid source , and a plurality of second holes fluidly connecting the at least one second internal cavity with the first passage , the plurality of second holes positioned such that in passing through the plurality of second holes , the second working fluid infuses the fibrous bundle material. a forming nozzle through which a fibrous bundle material passes, the forming nozzle comprising a converging passage , at least one first internal cavity in fluid connection with a first working fluid source , and a plurality of first holes fluidly connecting the at least one first internal cavity with a working surface of the forming nozzle , the plurality of first holes further positioned and directed such that in passing through the plurality of first holes , the first working fluid conveys the fibrous bundle material through the forming nozzle in a transport direction; a guide pin disposed along a central axis of the converging passage , the guide pin comprising an elongated body which tapers in the transport direction, wherein the guide pin further comprises an excitation device, wherein the excitation device preferably is a vibration generator linked vibrationally to the guide pin , wherein the excitation device further preferably is a motor non-rotationally connected to the guide pin , wherein the excitation device even further preferably is a pneumatic self-alignment system; and a bobbin disposed downstream of the forming nozzle , the bobbin comprising a first passage through which the fibrous bundle material is conveyed, at least one second internal cavity in fluid connection with a second working fluid source , and a plurality of second holes fluidly connecting the at least one second internal cavity with the first passage , the plurality of second holes positioned such that in passing through the plurality of second holes , the second working fluid infuses the fibrous bundle material. <EOS>