Aerosol-generating article having mouthpiece with upstream cavity

Abstract

An aerosol-generating article (10) comprises: an aerosol-generating substrate (12); and a mouthpiece (14) in axial alignment with the aerosol-generating substrate (12), the mouthpiece comprising an additive segment (18) of filtration material comprising one or more breakable capsules (22), each breakable capsule (22) comprising an outer shell and an inner core containing an additive. The additive segment (18) of filtration material is spaced downstream from the aerosol-generating substrate (12) to define an upstream cavity (24) between the aerosol-generating substrate (12) and the additive segment (18) of filtration material, wherein the upstream cavity is substantially unfilled. A wrapper (26) circumscribes the additive segment (18) of filtration material and the upstream cavity (24).

1 - 15 . (canceled) 
     
     
         16 . An aerosol-generating article comprising:
 an aerosol-generating substrate;   a mouthpiece in axial alignment with the aerosol-generating substrate, the mouthpiece comprising:
 an additive segment of filtration material comprising one or more breakable capsules, each breakable capsule comprising an outer shell and an inner core containing an additive, and 
 an intermediate segment of filtration material provided adjacent the aerosol-generating substrate, wherein the additive segment of filtration material is spaced downstream from the intermediate segment to define an upstream cavity between the intermediate segment and the additive segment of filtration material, wherein the upstream cavity is substantially unfilled; and 
   a wrapper circumscribing the additive segment of filtration material and the upstream cavity.   
     
     
         17 . An aerosol-generating article according to  claim 16 , wherein the length of the additive segment is lower than the length of the upstream cavity. 
     
     
         18 . An aerosol-generating article according to  claim 16 , wherein the hollow tube segment is formed from a paper material. 
     
     
         19 . An aerosol-generating article according to  claim 18 , wherein the hollow tube segment is formed from a plurality of overlapping paper layers. 
     
     
         20 . An aerosol-generating article according to  claim 19 , wherein the hollow tube segment is formed from at least two paper layers and fewer than eleven paper layers. 
     
     
         21 . An aerosol-generating article according to  claim 19 , wherein at least one of the paper layers is made from a paper with a basis weight of at least about 100 grams per square metre. 
     
     
         22 . An aerosol-generating article according to  claim 18 , wherein the wall thickness of the hollow tube segment is at least about 100 micrometres. 
     
     
         23 . An aerosol-generating article according to  claim 16 , wherein the additive segment includes a single breakable capsule provided approximately centrally along the length of the additive segment. 
     
     
         24 . An aerosol-generating article according to  claim 16 , wherein the mouthpiece further comprises one or more ventilation zones provided over the upstream cavity. 
     
     
         25 . An aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate is a source of tobacco material, tobacco extract, or other nicotine source, which is arranged to be heated, without combustion, to generate an aerosol. 
     
     
         26 . An aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has an overall length of between about 40 millimetres and about 90 millimetres. 
     
     
         27 . A system comprising an aerosol-generating article according to  claim 16  and a device comprising one or more electrical heating elements configured to heat the aerosol-generating substrate of the aerosol-generating article, without combustion, to produce an aerosol. 
     
     
         28 . A method comprising generating an aerosol from the aerosol-generating substrate of the aerosol-generating article according to  claim 16 .