An aerosol-generating article comprising a mouthpiece assembly

Abstract

An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the article including: a mouthpiece assembly including first, second, and third tubes; and an aerosol-forming substrate, in which the first tube abuts a downstream end face of the second tube, and the third tube abuts an upstream end face of the second tube, an internal diameter of the second tube is smaller than an internal diameter of the first tube and of the third tube, the internal diameter of the first tube is between 3 mm and 8 mm, a ratio of the internal diameter of the first tube to the internal diameter of the second tube is between 1.2 and 5, a ratio of the internal diameter of the first tube to the internal diameter of the third tube is between 0.5 and 2, and the second tube is a cellulose acetate tube.

1 .- 12 . (canceled) 
     
     
         13 . An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article comprising:
 a mouthpiece assembly comprising a first tube, a second tube, and a third tube; and   an aerosol-forming substrate,   wherein the first tube abuts a downstream end face of the second tube, and the third tube abuts an upstream end face of the second tube,   wherein an internal diameter of the second tube is smaller than an internal diameter of the first tube,   wherein the internal diameter of the second tube is smaller than an internal diameter of the third tube,   wherein the internal diameter of the first tube is between 3 mm and 8 mm,   wherein a ratio of the internal diameter of the first tube to the internal diameter of the second tube is between 1.2 and 5,   wherein a ratio of the internal diameter of the first tube to the internal diameter of the third tube is between 0.5 and 2, and   wherein the second tube is a cellulose acetate tube.   
     
     
         14 . The aerosol-generating article according to  claim 13 , wherein the internal diameter of the first tube is larger than the internal diameter of the third tube. 
     
     
         15 . The aerosol-generating article according to  claim 13 , wherein the first tube is a cellulose acetate tube. 
     
     
         16 . The aerosol-generating article according to  claim 13 , wherein the third tube is a cellulose acetate tube. 
     
     
         17 . The aerosol-generating article according to  claim 13 , wherein a ratio of the internal diameter of the third tube to the internal diameter of the second tube is between 1.5 and 5. 
     
     
         18 . The aerosol-generating article according to  claim 13 , wherein the first tube has an internal diameter of 4 mm. 
     
     
         19 . The aerosol-generating article according to  claim 13 , wherein the second tube has an internal diameter of between 1 mm and 3 mm. 
     
     
         20 . The aerosol-generating article according to  claim 13 , wherein the third tube has an internal diameter of between 3 mm and 8 mm. 
     
     
         21 . The aerosol-generating article according to  claim 13 , further comprising a ventilation zone. 
     
     
         22 . The aerosol-generating article according to  claim 21 , wherein the ventilation zone comprises one or more rows of ventilation perforations. 
     
     
         23 . The aerosol-generating article according to  claim 22 , wherein the one or more rows of ventilation perforations are formed through a wall of at least one of the first tube, the second tube, and the third tube.