Aerosol generating article with ventilation zone

Abstract

An aerosol generating article is provided, including a combustible heat source; an aerosol forming substrate downstream of the combustible heat source; and a wrapper circumscribing at least a rear portion of the combustible heat source and at least a front portion of the aerosol forming substrate, wherein a plurality of weakness formations are provided on a region of the wrapper overlying the combustible heat source, and wherein the wrapper is rupturable at the plurality of weakness formations and is configured to form a ventilation zone comprising a plurality of apertures extending through the wrapper.

1 .- 16 . (canceled) 
     
     
         17 . An aerosol generating article, comprising:
 a combustible heat source;   an aerosol forming substrate downstream of the combustible heat source; and   a wrapper circumscribing at least a rear portion of the combustible heat source and at least a front portion of the aerosol forming substrate,   wherein a plurality of weakness formations are provided on a region of the wrapper overlying the combustible heat source, and   wherein the wrapper is rupturable at the plurality of weakness formations and is configured to form a ventilation zone comprising a plurality of apertures extending through the wrapper.   
     
     
         18 . The aerosol generating article according to  claim 17 , wherein at least one of the weakness formations is defined by one or more lines of weakness. 
     
     
         19 . The aerosol generating article according to  claim 17 , wherein at least one of the weakness formations is defined by two or more intersecting lines of weakness. 
     
     
         20 . The aerosol generating article according to  claim 17 , wherein the plurality of weakness formations are formed from a local reduction in thickness of the wrapper. 
     
     
         21 . The aerosol generating article according to  claim 17 , wherein each weakness formation of the plurality of weakness formations has a circumferential dimension of at least about 0.5 mm. 
     
     
         22 . The aerosol generating article according to  claim 17 , wherein each weakness formation of the plurality of weakness formations has a circumferential dimension of from about 0.5 mm to about 2.6 mm. 
     
     
         23 . The aerosol generating article according to  claim 17 , wherein each weakness formation of the plurality of weakness formations has a circumferential dimension of from about 0.8 mm to about 1.8 mm. 
     
     
         24 . The aerosol generating article according to  claim 17 , wherein each weakness formation of the plurality of weakness formations has a length of at least about 0.1 mm. 
     
     
         25 . The aerosol generating article according to  claim 17 , wherein each weakness formation of the plurality of weakness formations has a length of from about 0.1 mm to about 2.1 mm. 
     
     
         26 . The aerosol generating article according to  claim 17 , wherein each weakness formation of the plurality of weakness formations has a length of from about 0.2 mm to about 1.8 mm. 
     
     
         27 . The aerosol generating article according to  claim 17 , wherein adjacent weakness formations among the plurality of weakness formations are separated in a circumferential direction by a circumferential separation of at least about 0.5 mm. 
     
     
         28 . The aerosol generating article according to  claim 17 , wherein adjacent weakness formations among the plurality of weakness formations are separated in a longitudinal direction by a longitudinal separation of at least about 0.4 mm. 
     
     
         29 . The aerosol generating article according to  claim 17 , wherein the plurality of weakness formations are provided in a regular pattern. 
     
     
         30 . The aerosol generating article according to  claim 17 , wherein the plurality of weakness formations are arranged such that the plurality of apertures have a total area of at least about 0.09 millimetres squared. 
     
     
         31 . The aerosol generating article according to  claim 17 , wherein the weakness formations of the plurality of weakness formations are arranged such that the plurality of apertures form indicia on an outer surface of the wrapper. 
     
     
         32 . The aerosol generating article according to  claim 17 , wherein the wrapper is formed from a heat conductive material. 
     
     
         33 . The aerosol generating article according to  claim 17 , wherein the wrapper is substantially impermeable to air. 
     
     
         34 . The aerosol generating article according to  claim 17 , wherein the wrapper circumscribes the combustible heat source along at least about 50 percent of a length of the combustible heat source. 
     
     
         35 . The aerosol generating article according to  claim 34 , wherein the weakness formations of the plurality of weakness formations are provided on the wrapper such that a ventilation zone extends along at least about 50 percent of the length of the combustible heat source. 
     
     
         36 . The aerosol generating article according to  claim 17 , wherein the wrapper is in direct contact with an outer surface of the combustible heat source.