Applying an additive from within during shaping of a sheet into a rod

Abstract

A method for producing a rod containing herbaceous material comprises the steps of: providing a sheet material containing herbaceous material; shaping the sheet material into a rod-shape by conveying the sheet material along a conveying direction through a funnel-shaped converging device; and dispensing an additive onto the sheet material within the converging device.

1 . A device for producing a rod from sheet material, comprising:
 a funnel-shaped converging device;   a conveyor device configured to convey sheet material along a conveying direction through the funnel-shaped converging device; and   a pipe having an end section configured for dispensing an additive from the end section within the converging device,   wherein a wall thickness of the end section of the pipe varies around a circumference of the end section of the pipe; and   wherein the pipe comprises a base section provided within the converging device upstream of the end section and a bent section connecting the base section with the end section.   
     
     
         2 . The device according to  claim 1 , wherein an outer surface of the end section of the pipe has a non-circular cross-section. 
     
     
         3 . The device according to  claim 1 , wherein an outer circumferential surface of the end section of the pipe has at least one flat portion. 
     
     
         4 . The device according to  claim 3 , wherein an angle between a first flat portion of the end section of the pipe and a second flat portion of the end section of the pipe is between 50 degrees and 70 degrees, or between 55 degrees and 65 degrees, or between 80 degrees and 100 degrees, or between 85 degrees and 95 degrees. 
     
     
         5 . The device according to  claim 1 , wherein an outer circumferential shape of the end section of the pipe is different from an outer circumferential shape of the base section of the pipe. 
     
     
         6 . The device according to  claim 1 , wherein an outer circumferential surface of the bent section of the pipe comprises at least one flat portion. 
     
     
         7 . The device according to  claim 1 , wherein an outer diameter of the pipe decreases along the conveying direction. 
     
     
         8 . The device according to  claim 1 , wherein the end section of the pipe is coated, in particular with a friction reducing coating.