Aerosol-generating device with article retention

Abstract

An aerosol-generating device is provided, including: a cavity configured to receive an aerosol-generating article; at least one heating element; and a plurality of projections extending from an internal surface of the cavity, each projection having a truncated hemispherical shape. An aerosol-generating system, including the aerosol-generating device and an aerosol-generating article, is also provided.

1 .- 36 . (canceled) 
     
     
         37 . An aerosol-generating device, comprising:
 a cavity configured to receive an aerosol-generating article;   at least one heating element; and   a plurality of projections extending from an internal surface of the cavity, wherein each projection has a truncated hemispherical shape.   
     
     
         38 . The aerosol-generating device according to  claim 37 ,
 wherein the cavity has a first end and a second end opposite the first end,   wherein the aerosol-generating device further comprises an opening at a first end of the cavity configured for inserting an aerosol-generating article into the cavity, and   wherein every projection is positioned closer to the first end of the cavity than the second end of the cavity.   
     
     
         39 . The aerosol-generating device according to  claim 38 ,
 further comprising an end face or a stopper defining the second end of the cavity,   wherein the end face or the stopper is arranged to abut an aerosol-generating article when the aerosol-generating article is fully inserted into the cavity.   
     
     
         40 . The aerosol-generating device according to  claim 38 ,
 wherein the cavity comprises a length extending between the first end and the second end, and   wherein a distance between the first end and each projection is less than one third of a length of the cavity.   
     
     
         41 . The aerosol-generating device according to  claim 37 , wherein the projections are equidistantly spaced about a circumference of the internal surface of the cavity. 
     
     
         42 . The aerosol-generating device according to  claim 37 , wherein each projection has a maximum cross-sectional diameter of between 0.8 millimetre and 2 millimetres. 
     
     
         43 . The aerosol-generating device according to  claim 37 ,
 wherein the cavity has a circular cross-sectional shape, and   wherein the internal surface of the cavity is a circumferential internal surface of the cavity.   
     
     
         44 . The aerosol-generating device according to  claim 37 , wherein the plurality of projections comprises a total of five projections. 
     
     
         45 . The aerosol-generating device according to  claim 37 , wherein the at least one heating element comprises an external heating element extending around at least a portion of an external surface of the cavity. 
     
     
         46 . The aerosol-generating device according to  claim 45 ,
 wherein the external heating element extends around only a central portion of the cavity to define a heating zone, and   wherein the projections are positioned outside of the heating zone.   
     
     
         47 . The aerosol-generating device according to  claim 45 , wherein the external heating element comprises a resistive heating element. 
     
     
         48 . The aerosol-generating device according to  claim 45 , wherein the external heating element comprises an inductor coil. 
     
     
         49 . An aerosol-generating system, comprising:
 an aerosol-generating device according to  claim 37 ; and   an aerosol-generating article comprising:
 a segment of aerosol-forming substrate, 
 at least one further segment positioned downstream of the segment of aerosol-forming substrate, and 
 an outer wrapper extending around the segment of aerosol-forming substrate and the at least one further segment, 
   wherein the projections are positioned to engage a portion of the outer wrapper extending around the at least one further segment when the aerosol-generating article is fully inserted into the cavity.   
     
     
         50 . The aerosol-generating system according to  claim 49 , wherein the at least one further segment comprises:
 at least one hollow tube positioned downstream of the segment of aerosol-forming substrate, and   at least one filter segment positioned downstream of the at least one hollow tube.   
     
     
         51 . The aerosol-generating system according to  claim 49 , wherein the outer wrapper is a paper outer wrapper.