An Aerosol Generating Article

Abstract

An aerosol generating article for use with an aerosol generating device comprises a substantially planar aerosol generating substrate, at least one airflow channel extending along the substantially planar aerosol generating substrate ( 14 ), and a wrapping member surrounding the substantially planar aerosol generating substrate and the at least one airflow channel. The at least one airflow channel comprises two or more portions having different cross-sections.

1 . An aerosol generating article for use with an aerosol generating device, the aerosol generating article comprising:
 a substantially planar aerosol generating substrate;   at least one airflow channel extending along the substantially planar aerosol generating substrate; and   a wrapping member surrounding the substantially planar aerosol generating substrate and the at least one airflow channel;   wherein the at least one airflow channel comprises two or more portions having different cross-sections.   
     
     
         2 . The aerosol generating article according to  claim 1 , wherein the aerosol generating article includes a distal end, a mouth end, a longitudinal axis extending between the mouth end and the distal end, and the at least one airflow channel extends in a first direction substantially parallel to the longitudinal axis. 
     
     
         3 . The aerosol generating article according to  claim 1 , wherein the two or more portions comprise an upstream portion and a downstream portion, the downstream portion having a larger cross-sectional area than the upstream portion. 
     
     
         4 . The aerosol generating article according to  claim 1 , wherein the two or more portions comprise an upstream portion and a downstream portion, the upstream portion of the at least one airflow channel comprises a groove formed in a surface of the substantially planar aerosol generating substrate and the downstream portion of the at least one airflow channel comprises a slit formed on one end of the substantially planar aerosol generating substrate. 
     
     
         5 . The aerosol generating article according to  claim 1 , wherein the substantially planar aerosol generating substrate has a flat rectangular shape having a pair of main surfaces and the wrapping member comprises a pair of rectangular sheets attached, respectively, to the pair of main surfaces. 
     
     
         6 . The aerosol generating article according to  claim 1 , wherein the aerosol generating article comprises a support member forming a mouth-end portion of the article, and the support member has a tubular shape to receive a downstream end of the aerosol generating substrate and the at least one airflow channel. 
     
     
         7 . The aerosol generating article according to  claim 1 , wherein the wrapping member has a porous inner surface facing towards the aerosol generating substrate for absorbing condensation and an anti-stick outer surface facing away from the aerosol generating substrate. 
     
     
         8 . The aerosol generating article according to  claim 7 , wherein the wrapping member comprises an anti-stick coating on the outer surface.