Smoking substitute consumable
An aerosol-forming article is disclosed having an improved filter at its axial downstream end, for instance a mouthpiece end. The improved filter comprises a filter segment having a plurality of bores extending there through, wherein a cooling segment is arranged upstream of the filter segment, the cooling segment comprising portion having a central bore that forms a central region extending around a central axis of the aerosol-forming article and a center of each bore of the plurality of bores is arranged radially outside of the central region.
1. An aerosol-forming article comprising an aerosol-forming substrate and a filter segment, the filter segment having a plurality of bores extending there through, wherein a cooling segment is arranged upstream of the filter segment, the cooling segment comprising a portion having a central bore that forms a central region extending around a central axis of the aerosol-forming article and a centre of each bore of the plurality of bores is arranged radially outside of the central region, wherein the filter segment is the greatest restriction to airflow between the aerosol-forming substrate and a mouthpiece end of the aerosol-forming article.
2. The aerosol-forming article of claim 1 , wherein each bore of the plurality of bores are open to the exterior at the mouthpiece end of the aerosol-forming article.
3. The aerosol-forming article of claim 2 , wherein the filter segment comprises a body and the plurality of bores extend from one distal face of the body to an opposed distal face of the body.
4. The aerosol-forming article of claim 3 , wherein the distal face arranged at a downstream end of the filter segment coincides with the mouthpiece end of the aerosol-forming article.
5. The aerosol-forming article of claim 1 , wherein the filter segment has an elongate form having a central axis and each bore of the plurality of bores extends parallel to the central axis.
6. The aerosol-forming article of claim 1 , wherein each bore of the plurality of bores has a circular cross-section that is constant along the length of the filter segment.
7. The aerosol-forming article of claim 1 , wherein the diameter of the central bore of the portion of the cooling segment has a diameter between 40% and 45% of a diameter of an external surface of said portion.
8. The aerosol-forming article of claim 1 , wherein the centres of each bore of the plurality of bores of the filter segment are arranged equally spaced about a notional circle.
9. The aerosol-forming article of claim 1 , wherein said portion is a first portion and the cooling segment includes a second portion having a larger airflow passage than an airflow passage created by the central bore of the first portion.
10. The aerosol-forming article of claim 9 , wherein the second portion comprises a spacer element having a central bore with a diameter greater than 95% of the diameter of an external surface of said portion comprising the spacer element.
11. The aerosol-forming article of claim 1 , wherein a total cross-sectional area of the plurality of bores is less than 20% of the cross-sectional area of the filter segment, or wherein a total cross-sectional area of the plurality of bores is less than 15% of the cross-sectional area of the filter segment or less than 10% of the cross-sectional area of the filter segment or around 6% of the cross-sectional area of the filter segment.
12. A system comprising an aerosol-forming article according to claim 1 and a device comprising a heating element.
13. The system according to claim 12 wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.
14. A method of using the system according to claim 12 , the method comprising:
inserting the article into the device; and
heating the article using the heating element.
15. A method according to claim 14 comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.