Aerosol-generating consumables

Abstract

1. An aerosol-generating consumable (100), comprising: an aerosol substrate portion (102) including an inlet end (104) through which air is drawn into the aerosol substrate portion (102) and an outlet end (106) through which aerosol exits the aerosol substrate portion (102), the aerosol substrate portion (102) extending longitudinally from the outlet end (106) to the inlet end (104); and a combustible heat source (108) configured to be ignited to heat the aerosol substrate portion (102), the combustible heat source (108) being positioned longitudinally to overlap a portion of the aerosol substrate portion (102), the inlet end (104) of the aerosol substrate portion (102) being configured to extend longitudinally beyond a tip (110) of the combustible heat source (108).

Description

[Technical field]

[0001] The present disclosure relates to aerosol-generating consumables, such as heat-non-combustion consumables. The present disclosure also relates to aerosol-generating devices for use with the aerosol-generating consumables. [Background technology]

[0002] Rather than relying on burning an aerosol-based consumable, various devices and systems are available that heat an aerosol-based consumable to release an aerosol / vapor for inhalation. For example, e-cigarettes vaporize e-liquid into a vapor that can be inhaled. However, while e-cigarettes are prone to leaking e-liquid, alternative devices are available that have solid consumables, which have the advantage of faster evaporation times. However, such devices require a heater to be part of the device, which introduces additional complexity and cost into the device.

[0003] Aerosol substrate consumables are known that include a combustible heat source. In this case, the combustible heat source can be ignited to combust the aerosol substrate and transfer heat to the aerosol substrate without burning the aerosol substrate. In one example, the combustible heat source can be in a tubular arrangement to surround the entire aerosol substrate material located therein. However, the use of a combustible heat source can result in the user inhaling combustion gases generated due to the combustion of the combustion heat source, which is undesirable. Controlling the heat distribution to the aerosol substrate material and avoiding the combustion of the aerosol substrate material is an additional challenge of existing combustion heat sources. Summary of the Invention [Problem to be solved by the invention]

[0004] It is an object of the present invention to overcome at least one of the above mentioned problems or to provide an alternative solution. [Means for solving the problem]

[0005] According to the present disclosure there is provided an aerosol-generating consumable (or aerosol-generating article) comprising the features defined in the claims.

[0006] In one example, an aerosol-generating consumable is provided, the aerosol-generating consumable including an aerosol substrate portion having an inlet end through which air is drawn into the aerosol substrate portion and an outlet end through which aerosol exits the aerosol substrate portion, the aerosol substrate portion extending longitudinally from the outlet end to the inlet end, and a combustible heat source configured to be ignited to heat the aerosol substrate portion, the combustible heat source being positioned longitudinally overlapping a portion of the aerosol substrate portion and configured such that the inlet end of the aerosol substrate portion extends longitudinally beyond the tip of the combustible heat source.

[0007] Providing a combustible heat source overlapping the aerosol substrate portion means that heat can be applied more evenly to the aerosol substrate portion during an inhalation session such that there is less chance of the aerosol substrate portion charring or burning during use so that an enhanced sensory experience is provided to the user.

[0008] Furthermore, because the inlet end of the aerosol substrate portion is configured to extend longitudinally beyond the tip of the combustible heat source, the opportunity for a user to inhale combustion gases generated by combustion of the combustible heat source during an inhalation session is reduced.

[0009] In one example, the proximal end of the combustible heat source extends into an area upstream of the exit end of the aerosol substrate portion. Because the proximal end of the combustible heat source terminates a short distance upstream of the exit end of the aerosol substrate portion, the risk of the user inhaling combustion gases is reduced because the user is away from the combustible heat source. This is particularly relevant when using an aerosol generating device with one or more air channels, as described below, because the combustion gases can exit the device through the one or more air channels. In addition, because the proximal end of the combustible heat source terminates a short distance upstream of the exit end of the aerosol substrate portion, the generated aerosol can be cooled to a suitable temperature before being inhaled. The distance (or gap) also reduces heating of the cooling segment or filter downstream of the aerosol substrate portion, so that combustion gases are less likely to be generated near the user's nose. Furthermore, due to diffusion and convection during inhalation, the combustible heat source does not need to extend the entire length of the aerosol substrate portion.

[0010] In one example, the aerosol-generating consumable includes a metal layer that encases the aerosol substrate portion and extends from the inlet end to at least the outlet end of the aerosol substrate portion. The metal layer reduces (or prevents) the passage of combustion gases to the aerosol substrate portion during use. The metal layer also aids in the transfer and spread of heat generated from a combustible heat source to the aerosol substrate portion.

[0011] In one example, the aerosol-generating consumable includes a paper layer that encases the aerosol substrate portion and extends from the inlet end to at least the outlet end of the aerosol substrate portion. The paper encasement layer helps dissipate heat to reduce the likelihood of a user being burned when handling the consumable after use. Paper is also a common, sustainable, inexpensive, and manufacturable material for use in encasing different components.

[0012] The combustible heat source may take the form of a tubular layer around the aerosol substrate portion. The tubular layer of combustible heat source may be used with substantially cylindrical aerosol-generating consumables that are relatively easy to manufacture. The tubular layer of combustible heat source also provides a way to uniformly heat the aerosol substrate portion.

[0013] In one example, the combustible heat source includes a repeating pattern of regions of greater height and / or width followed by regions of lesser height and / or width along its length. The variation in height and / or width means that the rate at which the combustible heat source burns can vary along its length, thereby controlling the heating of portions of the aerosol substrate and therefore the duration of the inhalation session.

[0014] The combustible heat source may be arranged in a serpentine path extending along the length, which means that the rate at which the combustible heat source burns can vary along its length, thereby controlling the heating of portions of the aerosol substrate and therefore the duration of the inhalation session.

[0015] In one example, the aerosol-generating consumable includes a proximal filter at or near the outlet end of the aerosol substrate portion, the proximal filter configured to filter certain components from the aerosol during use.

[0016] In one example, the aerosol-generating consumable includes a cooling segment, such as a paper tube, to cool the aerosol. The cooling segment can be used in addition to or instead of the proximal filter.

[0017] In one example, the aerosol-generating consumable includes a tip filter at the inlet end of the aerosol substrate portion, which may be configured to trap combustion gases (such as carbon-based gases) and thus reduce the amount of combustion gases inhaled by a user during an inhalation session.

[0018] In one example, at least one of the proximal and / or distal filters includes graphene, which is suitable for trapping carbon-based combustion gases, thus reducing (or preventing) the user from inhaling the combustion gases during an inhalation session.

[0019] In one example, the combustible heat source includes a carbon layer or graphite, which may include an ignition agent such as a potassium salt, such as KNO3, KOH, K2CO3, etc.

[0020] The aerosol generating system includes an aerosol generating device and an aerosol generating consumable.

[0021] In one example, an aerosol generating device is provided for generating an aerosol by combustion of a combustible heat source of an aerosol generating consumable, the device including a chamber for accommodating a portion of an aerosol substrate portion and the combustible heat source in use, the chamber being arranged to surround the combustible heat source when the aerosol generating consumable is positioned in an insertion position in the chamber.

[0022] The device is configured for use with an aerosol-generating consumable and is configured to prevent a user from coming into contact with a flammable heat source during use, thereby improving safety. Additionally, the aerosol-generating device is configured to keep heat within the chamber, avoiding heat dispersion around the aerosol-generating consumable.

[0023] In one example, the tip of the chamber includes a chamber air inlet configured to allow air to be drawn into the inlet end of the aerosol substrate portion of the aerosol-generating consumable. The air inlet provides a way to allow air to enter the chamber without mixing with the combustion gases.

[0024] In one example, the chamber air inlet is fluidly isolated from the combustible heat source when the aerosol-generating consumable is positioned in the chamber at an inserted position. The inserted position may be considered to be when the aerosol-generating consumable abuts against the tip of the chamber or a stopper within the chamber. Fluidly isolating the chamber air inlet from the combustible heat source or moving the air inlet away from the combustible heat source reduces the amount of combustion gases inhaled by a user.

[0025] In one example, the chamber (or housing) includes one or more air channels or conduits that are positioned downstream of the combustible heat source when the aerosol-generating consumable is positioned in the inserted position. The channels or conduits preferably extend from the interior of the chamber to the exterior surface of the housing. They provide a vent for combustion gases to exit the aerosol-generating device, as well as an air inlet for providing oxygen to the combustible heat source for combustion.

[0026] In one example, the aerosol generating device includes an ignition device or lighter configured to ignite the tip of the combustible heat source. Providing a lighter within the device simplifies the user experience.

[0027] In one example, the ignition device or lighter is configured to reach an ignition temperature of at least about 380°C, preferably at least about 420°C, and most preferably at least about 500°C.

[0028] In one example, the device includes a control unit configured to switch on the ignition device or lighter and to switch off the ignition device or lighter after reaching a temperature for ignition of the combustible heat source and / or after reaching a time period comprised between 5 and 30 seconds.

[0029] In one example, a system is provided that includes the aerosol generating device described above and the aerosol generating consumable described above.

[0030] In one example, a method of using the aerosol generating device described above is provided, the method including inserting an aerosol generating consumable as described above into the aerosol generating device and igniting a tip of a combustible heat source using an igniter of the aerosol generating device.

[0031] In the following, embodiments of the present invention will be described with reference to the accompanying drawings, in which: [Brief description of the drawings]

[0032] [Figure 1] Examples of aerosol-generating consumables are shown below. [Diagram 2] Examples of unenclosed flammable heat sources are: [Diagram 3] Here is another example of a combustible heat source in an unenclosed form: [Figure 4A] 1 shows an example of an aerosol generating device. [Figure 4B] 1 illustrates an example of an aerosol generating system that includes an aerosol generating device and an aerosol generating consumable. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] As used herein, the term aerosol substrate is a label used to mean a medium that generates an aerosol or vapor when heated. It may be synonymous with smokable material or aerosol-generating medium. Aerosol substrates include liquid or solid materials that provide a component that volatilizes upon heating, typically in the form of a vapor or aerosol. Aerosol substrates may be tobacco-free or tobacco-containing materials. Aerosol substrates may include, for example, one or more of tobacco itself, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco extracts, homogenized tobacco, or tobacco substitutes. Aerosol substrates may also include other non-tobacco products that may or may not contain nicotine depending on the product. Aerosol substrates may include one or more humectants, such as glycerin or propylene glycol.

[0034] 1 illustrates an example of an aerosol-generating consumable 100. The aerosol-generating consumable 100 includes an aerosol substrate portion 102 configured to generate an aerosol / vapor when heated. The aerosol substrate portion 102 has an inlet end 104 (or tip) through which air may be drawn into the aerosol substrate portion 102. The aerosol substrate portion 102 also has an outlet end 106 (or proximal end) through which the generated aerosol exits the aerosol substrate portion 102.

[0035] The aerosol substrate portion 102 can extend substantially longitudinally from the outlet end 106 to the inlet end 104. That is, the aerosol substrate portion 102 defines a longitudinal axis between the outlet end 106 and the inlet end 104, and the aerosol substrate portion 102 extends along the longitudinal axis.

[0036] The aerosol-generating consumable 100 includes a combustible heat source 108 configured to be ignited or combusted to heat the aerosol substrate portion 102. The combustible heat source 108 is arranged to longitudinally overlap a portion of the aerosol substrate portion 102. The inlet end 104 (or tip) of the aerosol substrate portion 102 is configured to extend longitudinally beyond an end (such as tip 110) of the combustible heat source 108. That is, the inlet end 104 of the aerosol substrate portion 102 protrudes beyond the tip 110 of the combustible heat source 108, which provides a path or gap through which any gas generated from the combustion of the combustible heat source 108 can escape without passing through the aerosol-generating portion 102. In other words, the combustible heat source 108 is configured to extend in a direction from a region downstream of the inlet end 104 of the aerosol-generating portion 102 toward the outlet end 106 of the aerosol-generating portion 102.

[0037] The recess 112 (or inlet recess) may be formed where the combustible heat source 108 does not overlap the aerosol substrate portion 102 towards (or at) the inlet end 104. The recess 112 may be formed by the aerosol-generating portion 102 extending beyond the combustion heat source 108 towards the inlet end 104. Because combustion gases do not pass through the aerosol substrate portion 102, a user is less likely to inhale them when using the aerosol-generating consumable 100.

[0038] The combustible heat source 108 is positioned to longitudinally overlap a portion of the aerosol substrate portion 102 so that heat is more evenly distributed to the aerosol substrate portion 102 during use. That is, the combustible heat source may be ignited (or ignited / burned) at the distal end 110 first, such that the inlet end 104 of the aerosol substrate portion 102 is initially heated to a higher temperature to volatilize the aerosol. The combustible heat source 108 then burns in the direction indicated by arrow A in FIG. 1 (i.e., from the distal end 110 to the proximal end 114). As the combustion point moves in the direction indicated by A, aerosol is generated from adjacent sections of the aerosol substrate portion 102. In one example, it takes about 3-5 minutes for the combustible heat source 108 to burn from the distal end 110 to the proximal end 114. Providing the combustible heat sources 108 around the aerosol substrate portion 102 in an overlapping arrangement improves the heat distribution along the aerosol substrate portion 102 during an inhalation session, thus reducing the chance of localized charring. In other words, the maximum level of heat applied to the aerosol substrate portion 102 is applied to different regions of the aerosol substrate portion over an inhalation session (e.g., initially the maximum heat is applied to the inlet end 104 or a region near the inlet end 104, and then, as the combustible heat source 108 burns toward the proximal end, the maximum heat applied to the aerosol substrate portion 102 moves with the combustion point). Thus, substantially the entire aerosol-generating portion 102 can be "used" to generate aerosol during an inhalation session. The process for combustion of the combustible heat source 108 is described in more detail below.

[0039] 1, a packaging layer 116 may be present around the aerosol substrate portion 102. The packaging layer 116 may extend at least from the inlet end 104 to the outlet end 106 of the aerosol substrate portion 102, and optionally beyond the end of the outlet end 106 of the aerosol substrate portion 102. The packaging layer 116 may be located between the combustible heat source 108 and the aerosol substrate portion 102. The packaging layer 116 is configured to prevent combustion gases from passing directly from the combustible heat source 108 to the aerosol substrate portion 102 during use.

[0040] When combined with the recesses 112 described above, the packaging layer 116 reduces the amount of combustion gases inhaled by a user during an inhalation session of the aerosol-generating consumable product 100 .

[0041] In one example, the packaging layer 116 includes a metal layer, such as aluminum foil, configured to transfer heat generated by the combustible heat source 108 to the aerosol substrate portion 102 while preventing combustion gases from passing to the aerosol substrate portion 102.

[0042] In one example, the packaging layer 116 includes a paper layer. A paper packaging layer may be used in addition to or instead of a metal layer. The packaging layer is configured to prevent thermal decomposition of the aerosol substrate portion 102 and localized combustion of the aerosol substrate portion 102. The packaging layer 116 also facilitates manufacturing of the aerosol-generating consumable 100 and provides additional structure / rigidity to the aerosol-generating consumable 100.

[0043] In some examples, the aerosol-generating consumable 100 includes a proximal filter 120 (or mouth-end filter). The proximal filter 120 may be located downstream of the outlet end 106 of the aerosol substrate portion 102. In one example, the proximal filter 120 abuts the outlet end 106 of the aerosol substrate portion 102. In another example, the proximal filter 120 is kept separated from the aerosol substrate portion 102 by an intermediate cooling segment, for example by a tubular member (not shown). The cooling segment may thus contribute to cooling the aerosol without increasing resistance to withdrawal. The proximal filter 120 may include cellulose acetate, paper, graphene, and / or charcoal, etc. The proximal filter 120 may be formed of one or several segments. A non-filtering tubular member may lengthen the filter at the mouth end of the consumable 100.

[0044] In some examples, the aerosol-generating consumable 100 includes a tip filter 122. The tip filter 122 is configured to be a carbon-trapping filter to prevent (or reduce the amount of) carbon-based combustion gases entering the inlet end 104 of the aerosol substrate portion 102. In one example, the tip filter 122 includes graphene, which is particularly well-suited for trapping carbon-based gases. In some examples, the tip filter 122 includes cellulose acetate.

[0045] In one example, the combustible heat source 108 is configured to heat the aerosol substrate portion 102 essentially via conductive heating. As shown in FIG. 1, in one example, the combustible heat source 108 is configured to be positioned around a portion of the aerosol substrate portion 102. In the illustrated example, the combustible heat source 108 is configured adjacent to the aerosol substrate portion 102. In the illustrated example, the combustible heat source 108 is configured adjacent to the aerosol substrate portion 102. As explained above, the packaging layer 116 can still be between the combustible heat source 108 and the aerosol substrate portion 102, but "adjacent" should not be limited to directly abutting, but rather close enough that heat generated by combustion of the combustible heat source is sufficient to volatilize the aerosol from the aerosol substrate portion 102.

[0046] The combustible heat source 108 may include a carbon (or graphite / coal) bed that, when ignited, burns to generate heat. One or more ignition agents may be present in the combustible heat source 108 to aid in the combustion of the combustible heat source 108. For example, the ignition temperature of the carbon bed may be lowered by ignition of one or more ignition agents, such as potassium additives. In one example, the ignition agent or agents include potassium salts (KNO3). The use of KNO3 may lower the ignition temperature of the carbon bed from about 690°C-720°C to about 565°C-595°C. Other potassium salts, such as KOH or K2CO3, may also be used to lower the ignition temperature of the carbon bed.

[0047] 1, the combustible heat source 108 may be disposed in a tubular arrangement around a portion of the aerosol substrate portion 102. That is, the aerosol substrate portion 102 may be substantially cylindrical, with the combustible heat source 108 forming a tube therearound.

[0048] As explained above, the combustible heat source 108 does not extend all the way to the inlet end 104 of the aerosol substrate portion 102, but rather stops a predetermined distance from the inlet end 104. In one example, the predetermined distance depends on the radius of the aerosol-generating consumable 100. For example, the predetermined distance may be from half the radius to twice the radius. For example, if the radius of the consumable 100 is 4 mm, the predetermined distance may be between 2 mm and 8 mm. This ratio of predetermined distances ensures that there is enough heat to provide to the inlet end 104 of the aerosol substrate portion 102 while also limiting the amount of combustion gases that enter the aerosol substrate portion 102 during use.

[0049] In one example, the combustible heat source 108 stops at a second predetermined distance from the exit end 106 of the aerosol substrate portion 102. Such an arrangement forms a recess 118 (or exit recess) in the exit end 106 of the aerosol substrate portion 102. The provision of the exit recess 118 reduces the risk of the user inhaling combustion gases because they are further away from the combustible heat source 108. In addition, because the base end 114 of the combustible heat source 108 terminates a short distance upstream of the exit end 106 of the aerosol substrate portion 102, the generated aerosol may cool to a suitable temperature before being inhaled by the user. The distance (or gap) also reduces heating of the cooling segment or filter downstream of the aerosol substrate portion 102, thus reducing the possibility of combustion gases being generated near the nose of the user. Furthermore, due to diffusion and convection during inhalation, the combustible heat source 108 does not need to extend all the way through the aerosol substrate portion 102. In one example, the second predetermined distance depends on the radius of the aerosol-generating consumable. For example, it may be equal to a distance equal to the radius to four times the radius of the aerosol-generating consumable 100.

[0050] In another example, the combustible heat source continues to the exit end 106 of the aerosol substrate portion 102 .

[0051] 2 illustrates an example of a combustible heat source 108 in an "unwrapped" (or flat) configuration. The combustible heat source 108 illustrated in FIG. 2 is wrapped around a packaging layer 116 (or directly around an aerosol substrate portion 102) to form the aerosol-generating consumable 100 described in FIG.

[0052] In the example shown in FIG. 2, the combustible heat source 108 includes a variety of heights h across the length of the combustible heat source 108. That is, tall regions 124 are followed by short regions 124 along the length of the combustible heat source 108. In other words, the combustible heat source 108 includes a repeating pattern of regions of high height (and thickness and / or width) followed by regions of low height (thickness and / or width) along the length. This arrangement provides control over the rate at which the combustible heat source 108 burns. The combustible heat source 108 takes longer to burn in the tall regions 124 compared to the short regions 124. During manufacturing of the combustible heat source 108, the relative sizes of the tall regions 124 and the short regions 124 can be set to control the burn rate of the combustible heat source 108.

[0053] 3 illustrates another example of a combustible heat source 108 in an "unwrapped" (or flat) configuration. The combustible heat source 108 illustrated in FIG. 3 is wrapped around a packaging layer 116 (or directly around an aerosol substrate portion 102) to form the aerosol-generating consumable 100 illustrated in FIG.

[0054] In Figure 3, the combustible heat source 108 is arranged in a serpentine (or undulating) path extending along the length. As with the example in Figure 2, this arrangement can be used to control the rate at which the combustible heat source 108 is configured to burn. In one example, the combustible heat source 108 may be in the form of a square wave arrangement along the length.

[0055] Generally, the combustible heat source 108 may have a uniform thickness such that the volume of the combustible heat source is between 5% and 20% of the volume of the aerosol substrate portion 108. In other examples, the thickness of the combustible heat source 108 varies along the length of the combustible heat source 108.

[0056] FIG. 4A shows an example of an aerosol generating device 200 for use with an aerosol-generating consumable 100. In FIG. 4A, the aerosol-generating consumable 100 is not present within the device 200. The aerosol generating device 200 includes a housing 202 configured to be held by a user during use. The housing 202 includes a suitable insulator to reduce the amount of heat transferred to a user holding the device 200. The device 200 includes a chamber (or consumable cavity or sheet) 204 for housing the aerosol-generating consumable 100 during use. The chamber 204 may have a shape complementary to the consumable 100. In use, the chamber 204 is configured to house at least a portion of the aerosol substrate portion 102 and the combustible heat source 108. The chamber 204 is arranged to surround the combustible heat source 108 when the aerosol-generating consumable 100 is positioned in an insertion position in the chamber. The insertion position of the aerosol-generating consumable 100 may be considered to be when the aerosol-generating consumable 100 is inserted into the aerosol generating device 200 such that the leading edge of the aerosol-generating consumable 100 abuts against a stopper (or seat) in the chamber 204. In other examples, the insertion position may be considered to be when the leading edge of the aerosol-generating consumable 100 abuts against the leading edge 206 of the chamber 204.

[0057] The tip 206 of the chamber 204 may include a chamber air inlet 208 configured to allow air to be drawn into the inlet end 104 of the aerosol substrate portion 102 of the aerosol-generating consumable 100 during use. The chamber air inlet 208 allows air to be drawn into the chamber 204 from outside the housing 202 during use.

[0058] In one example, the aerosol generating device 200 includes an ignition device 210 or lighter configured to ignite the tip (or upstream end) 110 of the combustible heat source 108 during use. The ignition device 210 may create a spark or a hot area sufficient to initiate combustion of the tip 110 of the combustible heat source 108. The ignition device 210 may take the form of a hot wire or spark discharge generator. A lighter is a metal that is heated by an electric current. In some examples, the lighter includes an infrared radiation source. The ignition device 210 may be activated in response to a user input (such as pressing a button or swiping a pad).

[0059] 4B illustrates an example of an aerosol generation system with the aerosol-generating consumable 100 (shown in FIG. 1 ) inserted into the aerosol generating device 200. In this example, the aerosol-generating consumable 100 is configured to abut the tip 206 of the chamber in the inserted position. In this position, air drawn into the aerosol-generating consumable 100 does not mix with the combustion gases. That is, the fluid path of the air drawn into the consumable 100 is fluidly isolated from the combustion gases generated by the combustible heat source 108. The abutment of the tip of the consumable 100 against the tip 206 of the chamber 204 (or a stopper, if present) prevents (or reduces) the flow of combustion gases into the aerosol-generating consumable 100 during use.

[0060] In one example, the chamber 204 includes one or more air channels or conduits 212 disposed downstream of the combustible heat source 108 when the aerosol-generating consumable 100 is positioned in the inserted position. The one or more air channels 212 may be configured to extend in a substantially radial direction (e.g., perpendicular to the longitudinal axis of the aerosol-generating consumable 100 when inserted into the aerosol generating device 200). The one or more air channels 212 provide a vent for combustion gases generated due to combustion of the combustible heat source 108 to exit the aerosol generating device 200 without being inhaled by a user.

[0061] In one example, one or more grooves (not shown) are provided in the chamber 206 to allow air to flow from one or more air channels 212 along the length of the combustible heat source 108 to support combustion of the combustible heat source 108.

[0062] While preferred embodiments have been illustrated and described, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention as defined in the appended claims and described above.

Claims

1. an aerosol substrate portion (102) including an inlet end (104) through which air is drawn into said aerosol substrate portion (102) and an outlet end (106) through which aerosol exits said aerosol substrate portion (102), said aerosol substrate portion (102) extending longitudinally from said outlet end (106) to said inlet end (104); a combustible heat source (108) configured to be ignited to heat the aerosol substrate portion (102); Including, the combustible heat source (108) is positioned to overlap a portion of the aerosol substrate portion (102) in the longitudinal direction; the inlet end (104) of the aerosol substrate portion (102) is configured to extend beyond the tip (110) of the combustible heat source (108) in the longitudinal direction; Aerosol-generating consumables (100).

2. 2. The aerosol-generating consumable (100) of claim 1, wherein a proximal end (114) of the combustible heat source (108) extends to a region upstream of the outlet end (106) of the aerosol substrate portion (102).

3. 10. The aerosol-generating consumable (100) of claim 1, including a metal layer encasing the aerosol substrate portion (102) and extending from the inlet end (104) to at least the outlet end (106) of the aerosol substrate portion (102).

4. 10. The aerosol-generating consumable (100) of claim 1, comprising a paper layer encasing the aerosol substrate portion (102) and extending from the inlet end (104) to at least the outlet end (106) of the aerosol substrate portion (102).

5. The aerosol-generating consumable (100) of claim 1, wherein the combustible heat source (108) forms a tubular layer around the aerosol substrate portion (102).

6. 2. The aerosol-generating consumable (100) of claim 1, wherein the combustible heat source (108) comprises a repeating pattern of regions of higher height and / or width (124) followed by regions of lower height and / or width (126) along the longitudinal direction.

7. The aerosol-generating consumable (100) of claim 1, wherein the combustible heat source (108) is arranged in a serpentine path extending along the longitudinal direction.

8. 10. The aerosol-generating consumable (100) of claim 1, comprising a proximal filter (120) at or near the outlet end (106) of the aerosol substrate portion (102).

9. The aerosol-generating consumable (100) of claim 1, comprising a tip filter (122) at the inlet end (104) of the aerosol substrate portion (102).

10. The aerosol-generating consumable (100) of claim 1, wherein at least one of the proximal filter (120) and / or the distal filter (122) comprises graphene.

11. An aerosol-generating consumable product (100) according to any one of claims 1 to 10; an aerosol generating device (200) for generating an aerosol by combustion of a combustible heat source (108) of the aerosol-generating consumable, the device (200) comprising a chamber (204) for containing, in use, at least a portion of the aerosol substrate portion (102) and the combustible heat source (108); Including, the chamber (204) is positioned to surround the combustible heat source (108) when the aerosol-generating consumable (100) is positioned in an insertion position in the chamber (204); Aerosol generation system.

12. 12. The aerosol generation system of claim 11, wherein the tip (206) of the chamber (204) includes a chamber air inlet (208) configured to allow air to be drawn into the inlet end (104) of the aerosol substrate portion (102) of the aerosol generating consumable (100).

13. 13. The aerosol generating system of claim 12, wherein when the aerosol generating consumable (100) is positioned in the insertion position in the chamber (204), the chamber air inlet (208) is fluidly isolated from the combustible heat source (108).

14. 13. The aerosol generating system of claim 12, wherein the chamber (204) includes one or more air channels (212) positioned downstream of the combustible heat source (108) when the aerosol generating consumable (100) is positioned in the insertion position.

15. 12. The aerosol generating system of claim 11, comprising an ignition device (210) or lighter configured to ignite the tip (110) of the combustible heat source (108).

16. 16. The aerosol generating system of claim 15, wherein the ignition device or lighter is configured to reach an ignition temperature of at least about 380°C, preferably at least about 420°C, and most preferably at least about 500°C.

17. 16. The aerosol generating system of claim 15, wherein the device comprises a control unit configured to switch on the igniter or lighter and to switch off the igniter or lighter after reaching a temperature for ignition of the combustible heat source and / or after reaching a period comprised between 5 and 30 seconds.

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