Aerosol generator article with a blocking element.

Abstract

An aerosol-generating article (100) comprising: an aerosol-generating substrate (10); an upstream element (20) located upstream of the aerosol-generating substrate (10), the upstream element (20) comprising a longitudinal airflow channel (24) and an obstruction element (26) for obstructing the longitudinal airflow channel (24), wherein the upstream element (20) is configured to change state upon heating during use of the aerosol-generating article (10) from: an initial state, in which the longitudinal airflow channel (24) is obstructed by the obstruction element (26) to substantially prevent airflow through the longitudinal airflow channel (24), to a final state, in which the longitudinal airflow channel (24) is at least partially open to allow airflow through the longitudinal airflow channel (24), wherein the upstream element (20) has a lower resistance to draw in the final state than in the initial state.

Description

1 / 63 “AEROSOL GENERATING ARTICLE WITH AN OBSTRUCTING ELEMENT”

[0001] The present invention relates to an aerosol generating article comprising an aerosol generating substrate for generating an inhalable aerosol by heating. The present invention also relates to an aerosol generating system comprising the aerosol generating article and an aerosol generating device configured to heat the aerosol generating substrate of the aerosol generating article.

[0002] Aerosol-generating articles in which an aerosol-generating substrate comprising aerosol-generating material, such as a tobacco-containing material, is heated instead of burned are known in the art. One objective of such heated aerosol-generating articles is to reduce known harmful smoke constituents of the type produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes.

[0003] Typically, in heated aerosol-generating articles, an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate. During use, volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source to the aerosol-generating substrate and are carried in the air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol that is inhaled by the user.

[0004] A known type of heated aerosol generating article, commonly referred to as a non-burning heated tobacco product or heated tobacco product, comprises a solid aerosol generating substrate comprising tobacco material, which is heated to produce an inhalable aerosol.

[0005] Various portable aerosol generating devices configured to heat aerosol generating substrates of aerosol generating articles Petition 870250083197, dated 09 / 16 / 2025, page 6 / 80 2 / 63 Heated aerosols are known in the art. This includes electrically operated aerosol generating devices in which an aerosol is generated by heat transfer from one or more electric heating elements of the aerosol generating device to the aerosol generating substrate of the heated aerosol generating article. Known electrically operated portable aerosol generating devices typically comprise a battery, electronic control components, and one or more electric heating elements for heating the aerosol generating substrate of a heated aerosol generating article specifically designed for use with the aerosol generating device.

[0006] Some electrically heated aerosol generating devices comprise an internal heating element that is configured to be inserted within the aerosol generating substrate of a heated aerosol generating article. For example, WO 2013 / 098410 A2 discloses an aerosol generating system comprising an aerosol generating article and an electrically operated aerosol generating device comprising a heating element in the form of a blade that is inserted into the aerosol generating substrate of the aerosol generating article.

[0007] Other known electrically operated aerosol generating devices comprise one or more external heating elements. For example, WO 2020 / 115151 A1 discloses an aerosol generating system comprising an aerosol generating article and an electrically operated aerosol generating device comprising an external heating element surrounding the periphery of the aerosol generating article.

[0008] Electrically operated aerosol generating devices comprise an inductor configured to induction heat aerosol generating substrates; heated aerosol generating articles are also known. For example, WO 2015 / 176898 A1 discloses an aerosol generating system comprising an aerosol generating article comprising Petition 870250083197, dated 09 / 16 / 2025, page 7 / 80 3 / 63 an elongated susceptor in thermal contact with the aerosol-generating substrate and an electrically operated aerosol-generating device with an inductor to heat the aerosol-generating substrate. During use, the alternating electromagnetic field produced by the inductor induces eddy currents in the susceptor, causing the susceptor to heat up as a result of one or both resistive losses (Joule heating) and, when the susceptor is magnetic, hysteresis losses. The heat generated in the susceptor is transferred to the aerosol-generating substrate by conduction.

[0009] The aerosol-generating substrate of an aerosol-generating article is known to absorb water from the air, for example, during storage of the aerosol-generating article. The aerosol-generating substrate can absorb water from the air until an equilibrium point is reached, at which point the water content of the aerosol-generating substrate can equal the relative humidity of the environment.

[0010] Heating of the aerosol-generating substrate during use of the aerosol-generating article can result in the evaporation of absorbed water, for example, before the evaporation of nicotine and glycerin in the aerosol-generating substrate. The resulting water vapor can carry a significant amount of energy and can increase the temperature of the aerosol dispensed to a user. This can result in an uncomfortable sensory experience for the user during at least the user's initial puffs. This phenomenon is referred to as hot aerosol perception and can be particularly problematic in hot and humid environments. In some cases, hot aerosol perception may prevent a user from using the aerosol-generating article.

[0011] Aerosol-generating articles comprising an upstream element are known. Some known aerosol-generating articles comprise an upstream element formed of the same material as a nozzle element. For example, an aerosol-generating article may comprise: an upstream element being an acetate fiber plug of Petition 870250083197, dated 09 / 16 / 2025, page 8 / 80 4 / 63 cellulose and a mouthpiece element being another cellulose acetate fiber plug. It can be difficult for a user to distinguish between the upstream end and the mouthpiece end of known aerosol-generating articles. A user may inadvertently insert the mouthpiece end of the aerosol-generating article into a cavity of an aerosol-generating device, which may result in inefficient heating of the aerosol-generating substrate. The user may inhale into the upstream end of the aerosol-generating article, which may not provide a desired mouthfeel or sensory experience.

[0012] After using an aerosol-generating article, a user may not be able to tell if the aerosol-generating article has already been heated to generate an aerosol. Subsequent use of the same aerosol-generating article may result in the distribution of aerosol to the user that is of inferior quality to aerosol generated by an aerosol-generating article that has not been previously used. A user may inadvertently use an already spent aerosol-generating article, for example, when the user places the spent aerosol-generating article back inside its pack for later disposal and then selects an aerosol-generating article from the same pack.

[0013] It would be desirable to provide an aerosol-generating device in which the sensory experience for the user and the quality of the aerosol delivered to the user are improved compared to known aerosol-generating devices.

[0014] The present invention relates to an aerosol generating article comprising an aerosol generating substrate. The aerosol generating article may comprise an upstream element located upstream of the aerosol generating substrate. The upstream element may comprise a longitudinal airflow channel. The upstream element may comprise an obstruction element to obstruct the longitudinal airflow channel. The upstream element may be configured to change state. Petition 870250083197, dated 09 / 16 / 2025, page 9 / 80 5 / 63 by heating during the use of the aerosol generating article. The upstream element can be configured to change from an initial state to a final state. In the initial state, the longitudinal airflow channel can be obstructed by the obstruction element. The longitudinal airflow channel being obstructed by the obstruction element can substantially impede airflow through the longitudinal airflow channel. In the final state, the longitudinal airflow channel can be at least partially opened. The longitudinal airflow channel can be at least partially opened to allow airflow through the longitudinal airflow channel. The upstream element may have a higher drag resistance in the final state than in the initial state.

[0015] According to a first aspect of the present invention, an aerosol generating article is provided comprising: an aerosol generating substrate; an upstream element located upstream of the aerosol generating substrate, the upstream element comprising a longitudinal airflow channel and an obstruction element for obstructing the longitudinal airflow channel, wherein the upstream element is configured to change state upon heating during use of the aerosol generating article from: an initial state, wherein the longitudinal airflow channel is obstructed by the obstruction element to substantially impede airflow through the longitudinal airflow channel, to a final state, wherein the longitudinal airflow channel is at least partially open to allow airflow through the longitudinal airflow channel, wherein the upstream element has a lower drag resistance in the final state than in the initial state.

[0016] The present invention also relates to an aerosol generating system. The aerosol generating system may comprise an aerosol generating article as described above. The aerosol generating system may comprise an aerosol generating device. The generating device Petition 870250083197, dated 09 / 16 / 2025, page 10 / 80 6 / 63 of aerosol can be configured to heat the aerosol-generating substrate of the aerosol-generating article.

[0017] According to a second aspect of the present invention, an aerosol generating system is provided comprising: an aerosol generating article according to the first aspect of the present invention; and an aerosol generating device configured to heat the aerosol generating substrate of the aerosol generating article, wherein the aerosol generating device comprises a compartment defining a cavity configured to receive the aerosol generating article.

[0018] As used in this document, in reference to the present invention, the term aerosol-generating article is used to describe an article comprising an aerosol-generating substrate that is heated to generate an inhalable aerosol for delivery to a user.

[0019] As used in this document, in reference to the present invention, the term aerosol-generating substrate is used to describe a substrate comprising aerosol-generating material that is capable of releasing, upon heating, volatile compounds that can generate an aerosol.

[0020] As used in this document, in reference to the present invention, the term aerosol is used to describe a dispersion of solid particles, or liquid droplets, or a combination of solid particles and liquid droplets, in a gas. The aerosol may be visible or invisible. The aerosol may include vapors of substances that are normally liquid or solid at room temperature, as well as solid particles, or liquid droplets, or a combination of solid particles and liquid droplets.

[0021] As used in this document in reference to the present invention, the term aerosol generating device is used to describe a device that interacts with the aerosol generating substrate of the aerosol generating article to generate an aerosol. Petition 870250083197, dated 09 / 16 / 2025, page 11 / 80 7 / 63

[0022] Aerosol-generating articles, according to the present invention, have a proximal end through which, when in use, an aerosol exits the aerosol-generating article for distribution to a user. The proximal end of the aerosol-generating article may also be referred to as the downstream end or mouth end of the aerosol-generating article. During use, a user directly or indirectly brings their breath onto the proximal end of the aerosol-generating article in order to inhale an aerosol generated by the aerosol-generating article.

[0023] The aerosol-generating articles according to the present invention have a distal end. The distal end is opposite the proximal end. The distal end of the aerosol-generating article may also be referred to as the upstream end of the aerosol-generating article.

[0024] Components of aerosol-generating articles according to the present invention can be described as being upstream or downstream of each other based on their relative positions between the proximal end of the aerosol-generating article and the distal end of the aerosol-generating article.

[0025] As used in this document in reference to the present invention, the term longitudinal is used to describe the direction between the upstream end and the downstream end of the aerosol-generating article. During use, air is drawn through the aerosol-generating article in the longitudinal direction.

[0026] As used in this document in reference to the present invention, the term length is used to describe the maximum dimension of the aerosol-generating article and components of the aerosol-generating article in the longitudinal direction.

[0027] As used in this document, in reference to the present invention, the term transverse is used to describe the direction perpendicular to Petition 870250083197, dated 09 / 16 / 2025, p. 12 / 80 8 / 63 lar to the longitudinal direction. Unless otherwise indicated, references to the cross-section of the aerosol-generating item or to a component of the aerosol-generating item refer to the cross-section.

[0028] As used in this document in reference to the present invention, the term width denotes the maximum dimension of the aerosol-generating article or of a component of the aerosol-generating article in a transverse direction. When the aerosol-generating article has a substantially circular cross-section, the width of the aerosol-generating article corresponds to the diameter of the aerosol-generating article. When a component of the aerosol-generating article has a substantially circular cross-section, the width of the component of the aerosol-generating article corresponds to the diameter of the component of the aerosol-generating article.

[0029] Unless otherwise indicated, the breath resistance (RTD) of the aerosol-generating article or a component of the aerosol-generating article is measured in accordance with ISO 6565-2015 at a volumetric flow rate of about 17.5 milliliters per second at the proximal end or downstream end of the aerosol-generating article or component thereof at a temperature of about 22 degrees Celsius, a pressure of about 101 kPa (about 760 Torr) and a relative humidity of about 60%.

[0030] For the purposes of the present invention, the inhaling resistance of the aerosol-generating article when the upstream element is in the final state is considered equal to the inhaling resistance of the aerosol-generating article after heating the aerosol-generating article so that the upstream element changes state to the final state and then subsequent cooling of the aerosol-generating article. For example, the inhaling resistance of the aerosol-generating article when the upstream element is in the final state can be considered equal to the inhaling resistance of the aerosol-generating article after the aerosol-generating article has been heated during use of the aerosol-generating article and then subsequently cooled. Petition 870250083197, dated 09 / 16 / 2025, p. 13 / 80 9 / 63 at about 22 degrees Celsius.

[0031] Similarly, for the purposes of the present invention, the drag resistance of the upstream element when the upstream element is in the final state is considered equal to the drag resistance of the upstream element after heating the upstream element so that the upstream element changes state to the final state and then subsequent cooling of the upstream element.

[0032] The aerosol generating articles according to the first aspect of the present invention comprise an upstream element located upstream of an aerosol generating substrate, the upstream element comprising a longitudinal airflow channel and an obstruction element for obstructing the longitudinal airflow channel, wherein the upstream element is configured to change state upon heating during use of the aerosol generating article from: an initial state, wherein the longitudinal airflow channel is obstructed by the obstruction element to substantially impede airflow through the longitudinal airflow channel, to a final state, wherein the longitudinal airflow channel is at least partially opened to allow airflow through the longitudinal airflow channel, wherein the upstream element has a lower drag resistance in the final state than in the initial state.

[0033] The inclusion of an upstream element with a lower inhale resistance in the final state than in the initial state can advantageously mitigate or prevent the perception of hot aerosol by a user. Before use of the aerosol-generating article, the upstream element may be in the initial state; after heating during use of the aerosol-generating article, the upstream element may transition to the final state; the inhale resistance of the upstream element decreasing from the initial to the final state. The decrease in the inhale resistance of the upstream element may be such that less air is drawn into the aerosol-generating article through the upstream element during the initial inhales by a Petition 870250083197, dated 09 / 16 / 2025, page 14 / 80 10 / 63 of what is drawn into the aerosol-generating article by the upstream element during subsequent inhalations by the user. Consequently, less aerosol may be delivered to the user during initial inhalations than during subsequent inhalations. This can help minimize or prevent uncomfortably heated aerosol from being delivered to a user and may improve the user's sensory experience.

[0034] As discussed further below, the aerosol-generating article may comprise a vent zone located downstream of the aerosol-generating substrate. Air drawn into the aerosol-generating article through the vent zone may help cool the aerosol stream generated by the aerosol-generating substrate before distribution to a user. The increased draft resistance of the upstream element may increase the draft level of the aerosol-generating article. The change in draft resistance of the upstream element during the change of state from the initial to the final state may be such that the aerosol-generating article has a higher draft level during the initial drafts than during subsequent drafts. This may be such that a higher level of cooling of the aerosol stream generated by the aerosol-generating substrate is achieved during the initial drafts than during subsequent drafts.Adjusting the cooling level of the aerosol during the user experience can neutralize the perception of a hot aerosol during initial puffs, while providing an acceptable aerosol temperature during subsequent puffs. This can improve the user's sensory experience.

[0035] The obstruction element can provide a visual cue to a user of the upstream end of the aerosol-generating article. This can help guide the user to correctly insert the upstream end of the aerosol-generating article into a cavity of an aerosol-generating device. Correct insertion of the aerosol-generating article into the aerosol-generating device can optimize substrate heating. Petition 870250083197, dated 09 / 16 / 2025, page 15 / 80 11 / 63 aerosol generator article aerosol generator to improve the quality of aerosol distributed to the user.

[0036] The user can identify the mouthpiece of the aerosol-generating article to place in their mouth during use of the aerosol-generating article. Doing so can provide the user with a desired mouthfeel and sensory experience.

[0037] During the use of the aerosol-generating article, the upstream element transitions from the initial state in which the longitudinal airflow channel is obstructed by the obstruction element to the final state in which the longitudinal airflow channel is at least partially open. The transition from the initial state to the final state can provide a visual signal to a user that the aerosol-generating article has been used. Such a visual signal can help a user avoid reusing a spent aerosol-generating article. This can help a user avoid receiving low-quality aerosol.

[0038] The upstream element is configured to change state upon heating during the use of the aerosol generating article from the initial state to the final state.

[0039] The initial state of the upstream element may correspond to the state of the upstream element before the use of the aerosol-generating article. The initial state of the upstream element may correspond to the state of the upstream element before heating the aerosol-generating article, for example, by an aerosol-generating device.

[0040] The upstream element may be in the initial state for an initial period after the start of heating of the aerosol-generating article. For example, the upstream element may be in the initial state for about the first minute from the start of heating of the aerosol-generating article. The upstream element may be in the initial state until shortly after the first, second, or third puff by a user.

[0041] The upstream element may be in its final state for most of the user experience. For example, the upstream element may Petition 870250083197, dated 09 / 16 / 2025, page 16 / 80 12 / 63 to be in the final state from about the first minute after the start of heating of the aerosol-generating article until at least the end of the user experience. The upstream element may be in the final state shortly after the first, second, or third puff by a user until the end of the user experience.

[0042] The obstruction element may comprise a heat-sensitive material. The obstruction element may be heat-sensitive.

[0043] During the change of state of the upstream element from the initial state to the final state, the viscosity of the obstruction element may decrease. This may be such that the obstruction element flows during the change of state of the upstream element from the initial state to the final state.

[0044] The obstruction element may be absorbed by another component of the upstream element when the upstream element is in its final state. For example, where the upstream element comprises a cellulose acetate fiber plug, the obstruction element may be absorbed by the cellulose acetate fiber plug when the upstream element is in its final state.

[0045] The longitudinal airflow channel may be substantially empty when the upstream element is in its final state. The longitudinal airflow channel may be substantially unobstructed when the upstream element is in its final state.

[0046] The obstruction element may melt during the change of state of the upstream element from the initial state to the final state.

[0047] The melting point of the blocking element can be selected based on a desired time of state change of the upstream element from the initial state to the final state during the use of the aerosol-generating article. The melting point of the blocking element can be high enough to prevent the upstream element from changing state from the initial state to the final state during storage of the aerosol-generating article and before heating and use of the aerosol-generating article. The Petition 870250083197, dated 09 / 16 / 2025, page 17 / 80 13 / 63 The melting point of the blocking element may be sufficiently low so that the upstream element changes from the initial state to the final state during the heating of the aerosol-generating article, for example, by an aerosol-generating device. The melting point of the blocking element may be selected so that the upstream element changes from the initial state to the final state once a significant amount of water in the aerosol-generating substrate has evaporated, but before a significant amount of other components of the aerosol-generating substrate has vaporized. This can advantageously avoid the perception of hot aerosol while providing a user with a desired sensory experience and improved aerosol quality. The melting point of the blocking element may be such that the upstream element changes from the initial state to the final state shortly after a first, second, or third puff by a user.The melting point of the obstructing element may be such that the upstream element changes from its initial state to its final state approximately one minute after the start of heating of the aerosol-generating article, for example, by an aerosol-generating device.

[0048] The obstructing element may have a melting point between about 40 degrees Celsius and about 220 degrees Celsius, between about 40 degrees Celsius and about 150 degrees Celsius, between about 40 degrees Celsius and about 100 degrees Celsius, or between about 40 degrees Celsius and about 80 degrees Celsius.

[0049] The obstructing element may have a melting point between about 45 degrees Celsius and about 220 degrees Celsius, between about 45 degrees Celsius and about 150 degrees Celsius, between about 45 degrees Celsius and about 100 degrees Celsius, or between about 45 degrees Celsius and about 80 degrees Celsius.

[0050] The obstructing element may have a melting point between about 50 degrees Celsius and about 220 degrees Celsius, between about 50 degrees Petition 870250083197, dated 09 / 16 / 2025, page 18 / 80 14 / 63 Celsius and about 150 degrees Celsius, between about 50 degrees Celsius and about 100 degrees Celsius, or between about 50 degrees Celsius and about 80 degrees Celsius.

[0051] After heating the aerosol-generating article so that the upstream element changes state to the final state, the obstruction element may solidify after subsequent cooling of the aerosol-generating article. The shape of the obstruction element when the upstream element is in the final state may be substantially the same as the shape of the obstruction element after subsequent cooling of the aerosol-generating article.

[0052] The shape of the obstruction element after heating the aerosol-generating article (so that the upstream element changes state to the final state) and subsequent cooling of the aerosol-generating article may be different from the shape of the obstruction element when the upstream element is in the initial state.

[0053] The obstruction element may be in the form of a solid when the upstream element is in its initial state. The obstruction element may be in the form of a solid column when the upstream element is in its initial state.

[0054] The obstruction element may be in the form of a powder when the upstream element is in its initial state. For example, the obstruction element may be in the form of a solid column of compressed powder. As another example, the obstruction element may be in the form of loose powder.

[0055] The obstructing element may be in the form of a gel when the upstream element is in its initial state.

[0056] The obstruction element may be in the form of a liquid when the upstream element is in its final state. The obstruction element may be in the form of a gel when the upstream element is in its final state. Petition 870250083197, dated 09 / 16 / 2025, page 19 / 80 15 / 63

[0057] The obstructing element may comprise a wax. The obstructing element may comprise a lipid.

[0058] The obstructing element may comprise one or more of the following: Stearin, paraffin, glycerin, gum arabic, and a sugar.

[0059] Preferably, the blocking element comprises stearin. The blocking element may comprise stearin in an amount of at least about 80 percent by weight or at least about 90 percent by weight on a dry weight basis.

[0060] The obstructing element may comprise stearin and glycerin.

[0061] Stearin may be in powder form when the upstream element is in its initial state.

[0062] The upstream element has a lower inhalation resistance in the final state than in the initial state. The change in inhalation resistance of the upstream element during the state change from the initial to the final state may help to neutralize the perception of hot aerosol during initial inhalations while providing an acceptable aerosol of adequate temperature during subsequent inhalations. This may improve the user's sensory experience throughout the user experience.

[0063] The upstream element's drag resistance in the initial state may be such that supplying the upstream element neutralizes the perception of hot aerosol during initial drags by a user. Increasing the upstream element's drag resistance may reduce the amount of air drawn into the aerosol-generating article through the upstream element. This may reduce the amount of aerosol delivered to the user. Reducing the amount of aerosol delivered to a user during initial drags may help neutralize the perception of hot aerosol.

[0064] The inhalability resistance of the upstream element in the final state may be such that the aerosol-generating article provides a user with a sensory experience desired for most of the user experience and after Petition 870250083197, dated 09 / 16 / 2025, page 20 / 80 16 / 63 the few initial puffs by the user. For example, the resistance to inhalation of the upstream element in the final state may be such that the force required to draw air through the aerosol-generating article is desired and the aerosol delivered to the user is at a desired temperature and has a desired composition.

[0065] The drag resistance of the upstream element may vary depending on the overall configuration of the aerosol-generating article.

[0066] The drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state by at least about 20 percent, at least about 40 percent, or at least about 60 percent. In some cases, the drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state by at least about 90 percent.

[0067] The drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state by less than or equal to about 95 percent, less than or equal to about 90 percent, or less than or equal to about 85 percent.

[0068] The drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state by between about 20 percent and about 95 percent, between about 20 percent and about 90 percent, or between about 20 percent and about 85 percent.

[0069] The drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state by between about 40 percent and about 95 percent, between about 40 percent and about 90 percent, or between about 40 percent and about 85 percent.

[0070] The drag resistance of the upstream element in the final state Petition 870250083197, dated 09 / 16 / 2025, p. 21 / 80 17 / 63 may be less than the drag resistance of the upstream element in the initial state by between about 60 percent and about 95 percent, between about 60 percent and about 90 percent, or between about 60 percent and about 85 percent.

[0071] In some cases, the drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state by about 90 percent to about 95 percent.

[0072] The upstream element's drag resistance in the final state may be less than the upstream element's drag resistance in the initial state by at least about 5 millimeters of H2O, at least about 15 millimeters of H2O, or at least about 25 millimeters of H2O. In some cases, the upstream element's drag resistance in the final state may be less than the upstream element's drag resistance in the final state by at least about 90 millimeters of H2O.

[0073] The upstream element's drag resistance in the final state may be less than the upstream element's drag resistance in the initial state by less than or equal to about 200 millimeters of H2O. The upstream element's drag resistance in the final state may be less than the upstream element's drag resistance in the initial state by being less than or equal to about 90 millimeters of H2O, less than or equal to about 75 millimeters of H2O, or less than or equal to about 60 millimeters of H2O.

[0074] The upstream element's drag resistance in the final state may be less than the upstream element's drag resistance in the initial state between about 5 millimeters of H2O and about 200 millimeters of H2O, between about 5 millimeters of H2O and about 90 millimeters of H2O, between about 5 millimeters of H2O and about 75 millimeters of H2O, or between about 5 millimeters of H2O and about 60 millimeters of H2O.

[0075] The drag resistance of the upstream element in the final state Petition 870250083197, dated 09 / 16 / 2025, page 22 / 80 18 / 63 may be less than the drag resistance of the upstream element in the initial state between about 15 millimeters of H2O and about 200 millimeters of H2O, between about 15 millimeters of H2O and about 90 millimeters of H2O, between about 15 millimeters of H2O and about 75 millimeters of H2O, or between about 15 millimeters of H2O and about 60 millimeters of H2O.

[0076] The drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state between about 25 millimeters of H2O and about 200 millimeters of H2O, between about 25 millimeters of H2O and about 90 millimeters of H2O, between about 25 millimeters of H2O and about 75 millimeters of H2O, or between about 25 millimeters of H2O and about 60 millimeters of H2O.

[0077] In some cases, the drag resistance of the upstream element in the final state may be less than the drag resistance of the upstream element in the initial state between about 90 millimeters of H2O and about 200 millimeters of H2O.

[0078] The drag resistance of the upstream element in the initial state may be at least about 15 mm H2O, at least about 25 mm H2O, or at least about 35 mm H2O. In some cases, the drag resistance of the upstream element in the initial state may be at least about 100 mm H2O.

[0079] The drag resistance of the upstream element in the initial state may be less than or equal to about 200 millimeters of H2O. The drag resistance of the upstream element in the initial state may be less than or equal to about 100 millimeters of H2O, less than or equal to about 85 millimeters of H2O, or less than or equal to about 70 millimeters of H2O.

[0080] The drag resistance of the upstream element in the final state may be at least about 2 mm H2O, at least about 5 mm H2O, or at least about 10 mm H2O.

[0081] The drag resistance of the upstream element in the final state may be less than or equal to about 25 millimeters of H2O, less than or Petition 870250083197, dated 09 / 16 / 2025, p. 23 / 80 19 / 63 equals approximately 20 millimeters of H2O or less than or equal to approximately 15 millimeters of H2O.

[0082] In a decrease in the drag resistance of the upstream element in a state change from the initial state to the final state, the overall drag resistance of the aerosol-generating article may also decrease.

[0083] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be lower than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state.

[0084] A reduction in the overall inhale resistance of the aerosol-generating article during a state change of the upstream element from the initial state to the final state can help neutralize the perception of hot aerosol during initial inhales while providing an acceptable aerosol of adequate temperature during subsequent inhales. This can improve the user's sensory experience throughout the user experience.

[0085] In some cases, the inhale resistance of the aerosol-generating article when the upstream element is in the initial state can be relatively large. In some cases, the difference in inhale resistance of the aerosol-generating article when the upstream element is in the initial state and when the upstream element is in the final state can be relatively large.These cases may be, for example, where the obstruction element has a relatively large cross-sectional area, or where the upstream element comprises a plurality of obstruction elements and the total cross-sectional area of ​​the plurality of cross-sectional elements is relatively large. In these cases, the obstruction element may be provided as a lining or a layer on an end face of an upstream plug of the upstream element.

[0086] The overall resistance to inhaling of the aerosol-generating article when the upstream element is in the final state may be less than Petition 870250083197, dated 09 / 16 / 2025, page 24 / 80 20 / 63 the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by at least about 5 percent, at least about 10 percent, or at least about 15 percent. In some cases, the overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by at least about 30 percent.

[0087] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by less than or equal to about 80 percent, less than or equal to about 60 percent, or less than or equal to about 40 percent.

[0088] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by between about 5 percent and about 80 percent, between about 5 percent and about 60 percent, or between about 5 percent and about 40 percent.

[0089] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by between about 10 percent and about 80 percent, between about 10 percent and about 60 percent, or between about 10 percent and about 40 percent.

[0090] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by between about 15 percent and about Petition 870250083197, dated 09 / 16 / 2025, p. 25 / 80 21 / 63 of 80 percent, between about 15 percent and about 60 percent, or between about 15 percent and about 40 percent.

[0091] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by between about 30 percent and about 80 percent, between about 30 percent and about 60 percent, or between about 30 percent and about 40 percent.

[0092] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by at least about 5 millimeters of H2O, at least about 8 millimeters of H2O, or at least about 12 millimeters of H2O. In some cases, the overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article by at least about 50 millimeters of H2O.

[0093] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by less than or equal to about 120 millimeters of H2O. The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by less than or equal to about 40 millimeters of H2O, less than or equal to about 30 millimeters of H2O, or less than or equal to about 20 millimeters of H2O.

[0094] The overall drag resistance of the aerosol-generating item when the upstream element is in the final state may be less than Petition 870250083197, dated 09 / 16 / 2025, p. 26 / 80 22 / 63 the overall resistance to inhaling of the aerosol-generating article when the upstream element is in the initial state between about 5 millimeters of H2O and about 120 millimeters of H2O, between about 5 millimeters of H2O and about 40 millimeters of H2O, between about 5 millimeters of H2O and about 30 millimeters of H2O, between about 5 millimeters of H2O and about 20 millimeters of H2O.

[0095] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state between about 8 mm H2O and about 120 mm H2O, between about 8 mm H2O and about 40 mm H2O, between about 8 mm H2O and about 30 mm H2O, between about 8 mm H2O and about 20 mm H2O.

[0096] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state between about 12 mm H2O and about 120 mm H2O, between about 12 mm H2O and about 40 mm H2O, between about 12 mm H2O and about 30 mm H2O, between about 12 mm H2O and about 20 mm H2O.

[0097] In some cases, the overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state between about 50 millimeters of H2O and about 120 millimeters of H2O.

[0098] The overall drag resistance of the aerosol-generating article when the upstream element is in the initial state may be at least about 40 millimeters of H2O, at least about 45 millimeters of H2O Petition 870250083197, dated 09 / 16 / 2025, p. 27 / 80 23 / 63 or at least about 50 millimeters of H2O. In some cases, the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state can be at least about 100 millimeters of H2O.

[0099] The overall drag resistance of the aerosol-generating article when the upstream element is in the initial state may be less than or equal to about 200 millimeters of H2O. The overall drag resistance of the aerosol-generating article when the upstream element is in the initial state may be less than or equal to about 100 millimeters of H2O, less than or equal to about 85 millimeters of H2O, or less than or equal to about 70 millimeters of H2O.

[0100] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be at least about 25 millimeters of H2O, at least about 30 millimeters of H2O, or at least about 35 millimeters of H2O.

[0101] The overall drag resistance of the aerosol-generating article when the upstream element is in the final state may be less than or equal to about 80 millimeters of H2O, less than or equal to about 70 millimeters of H2O, or less than or equal to about 60 millimeters of H2O.

[0102] As discussed further below, the aerosol-generating article may comprise a downstream section located downstream of the aerosol-generating substrate. The downstream section may comprise a vent zone.

[0103] The ventilation level of the aerosol-generating article when the upstream element is in the final state may be lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state.

[0104] As used in this document in reference to the present invention, the term ventilation level is used to denote a volume ratio between the airflow admitted into the aerosol-generating article by Petition 870250083197, dated 09 / 16 / 2025, page 28 / 80 24 / 63 means the middle of a ventilation zone (ventilation airflow) and the sum of the aerosol airflow and the ventilation airflow. The higher the ventilation level, the greater the dilution of the aerosol flow delivered to the user. Increasing the ventilation level can increase the cooling level of the aerosol flow before delivery to a user.

[0105] A change in the ventilation level of the aerosol-generating article when the upstream element changes from the initial state to the final state during the user experience can help neutralize the percentage of hot aerosol during the initial puffs by a user while providing an acceptable aerosol of adequate temperature during subsequent puffs.

[0106] A greater difference in the drag resistance of the upstream element or aerosol-generating article when the upstream element is in the initial state and when the upstream element is in the final state may result in a greater difference in the ventilation level of the aerosol-generating article when the upstream element is in the initial state and when the upstream element is in the final state.

[0107] In some cases, the ventilation level of the aerosol-generating article when the upstream element is in its initial state can be relatively large. In some cases, the difference in the ventilation level of the aerosol-generating article when the upstream element is in its initial state and when the upstream element is in its final state can be relatively large. These cases may be, for example, where the obstruction element has a relatively large cross-sectional area, or where the upstream element comprises a plurality of obstruction elements and the total cross-sectional area of ​​the plurality of cross-sectional elements is relatively large. In these cases, the obstruction element may be provided as a coating on an end face of an upstream plug of the upstream element.

[0108] Ventilation of the aerosol-generating article when the element Petition 870250083197, dated 09 / 16 / 2025, page 29 / 80 25 / 63 upstream when in the final state may be lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state by at least about 4 percentage points, at least about 6 percentage points, or at least about 8 percentage points. In some cases, the ventilation of the aerosol-generating article when the upstream element is in the final state may be lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state by at least about 30 percentage points.

[0109] A ventilation level of the aerosol-generating article when the upstream element is in the final state may be less than a ventilation level of the aerosol-generating article when the upstream element is in the initial state by less than or equal to about 60 percentage points. A ventilation level of the aerosol-generating article when the upstream element is in the final state may be less than a ventilation level of the aerosol-generating article when the upstream element is in the initial state by less than or equal to about 25 percentage points, less than or equal to about 20 percentage points, or less than or equal to about 15 percentage points.

[0110] The ventilation level of the aerosol-generating article when the upstream element is in the final state may be lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state by between about 4 percentage points and about 60 percentage points, between about 4 percentage points and about 25 percentage points, between about 4 percentage points and about 20 percentage points, or between about 4 percentage points and about 15 percentage points.

[0111] The ventilation level of the aerosol-generating article when the upstream element is in its final state may be lower than the ventilation level of the aerosol-generating article when the upstream element is in its initial state by between approximately 6 percentage points and approximately 60 points. Petition 870250083197, dated 09 / 16 / 2025, p. 30 / 80 26 / 63 percent, between about 6 percentage points and about 25 percentage points, between about 6 percentage points and about 20 percentage points, or between about 6 percentage points and about 15 percentage points.

[0112] A ventilation level of the aerosol-generating article when the upstream element is in the final state may be lower than a ventilation level of the aerosol-generating article when the upstream element is in the initial state by between about 8 percentage points and about 60 percentage points, between about 8 percentage points and about 25 percentage points, between about 8 percentage points and about 20 percentage points, or between about 8 percentage points and about 15 percentage points.

[0113] In some cases, the ventilation level of the aerosol-generating article when the upstream element is in the final state may be lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state by about 30 percentage points to about 60 percentage points.

[0114] When the upstream element is in the initial state, the aerosol-generating article may have a ventilation level of at least about 30 percent, at least about 35 percent, or at least about 40 percent. In some cases, when the upstream element is in the initial state, the aerosol-generating item may have a ventilation level of at least about 60 percent.

[0115] When the upstream element is in the initial state, the aerosol-generating article may have a ventilation level less than or equal to about 80 percent, less than or equal to about 70 percent, or less than or equal to about 60 percent.

[0116] When the upstream element is in the initial state, the aerosol-generating article may have a ventilation level between about 30 percent and about 80 percent, between about 30 percent and about 70 percent Petition 870250083197, dated 09 / 16 / 2025, p. 31 / 80 27 / 63 percent, or between about 30 percent and about 60 percent.

[0117] When the upstream element is in the initial state, the aerosol-generating article may have a ventilation level between about 35 percent and about 80 percent, between about 35 percent and about 70 percent, or between about 35 percent and about 60 percent.

[0118] When the upstream element is in the initial state, the aerosol-generating article may have a ventilation level between about 40 percent and about 80 percent, between about 40 percent and about 70 percent, or between about 40 percent and about 60 percent.

[0119] In some cases, when the upstream element is in the initial state, the aerosol-generating article may have a ventilation level between about 60 percent and about 80 percent, or between about 60 percent and about 70 percent.

[0120] When the upstream element is in its initial state, the obstruction element can substantially impede airflow through the upstream element. When this is the case, when the upstream element is in its initial state, the aerosol-generating item can have a ventilation level of approximately 100 percent. In other words, substantially all the air entering the aerosol-generating item can be drawn into the aerosol-generating item through the ventilation zone.

[0121] When the upstream element is in the final state, the aerosol-generating article may have a ventilation level of at least about 15 percent, at least about 20 percent, or at least about 25 percent.

[0122] When the upstream element is in the final state, the aerosol-generating article may have a ventilation level less than or equal to about 60 percent, less than or equal to about 55 percent, or less than or equal to about 50 percent.

[0123] When the upstream element is in its final state, the aerosol-generating item may have a ventilation level of approximately 15 percent Petition 870250083197, dated 09 / 16 / 2025, p. 32 / 80 28 / 63 and about 60 percent, or between about 15 percent and about 55 percent, or between about 15 percent and about 50 percent.

[0124] When the upstream element is in the final state, the aerosol-generating article may have a ventilation level between about 20 percent and about 60 percent, or between about 20 percent and about 55 percent, or between about 20 percent and about 50 percent.

[0125] When the upstream element is in the final state, the aerosol-generating article may have a ventilation level between about 25 percent and about 65 percent, or between about 25 percent and about 55 percent, or between about 25 percent and about 50 percent.

[0126] For example, when the upstream element is in the final state, the aerosol-generating item may have a ventilation level of about 50 percent.

[0127] When the upstream element is in the initial state, the obstruction element may be located at least partially in the longitudinal airflow channel to substantially impede airflow through the longitudinal channel. When the upstream element is in the initial state, the obstruction element may be located entirely in the longitudinal airflow channel.

[0128] When the upstream element is in its initial state, the obstruction element may be located at the upstream end of the upstream element. When the upstream element is in its initial state, the obstruction element may extend from the upstream end of the upstream element toward the downstream end of the upstream element. The obstruction element located at the upstream end of the upstream element may act as a visual signal to a user at the upstream end of the aerosol-generating article. When the upstream element changes from its initial state to its final state, the obstruction element may move so that the configuration and position of the obstruction element in its final state may indicate to a user that the Petition 870250083197, dated 09 / 16 / 2025, page 33 / 80 29 / 63 aerosol generator article was used.

[0129] When the upstream element is in the initial state, the obstruction element may be located at the downstream end of the upstream element. When the upstream element is in the initial state, the obstruction element may extend from the downstream end of the upstream element towards the upstream end of the upstream element. During the use of the aerosol-generating article, the aerosol-generating article may be oriented so that its upstream end is located vertically below its downstream end.The obstruction element located at the downstream end of the upstream element when the upstream element is in its initial state may mean that, after heating during the use of the aerosol-generating article and during the change of state of the upstream element from the initial to the final state, the obstruction element flows towards the upstream end of the aerosol-generating article and away from the aerosol-generating substrate. During the change of state of the upstream element, the obstruction element may be absorbed by another component of the upstream element, such as an upstream plug of the upstream element.

[0130] When the upstream element is in the initial state, the obstruction element can extend from the upstream end of the upstream element to the downstream end of the upstream element. This can simplify the manufacture of the upstream element, as it can allow multiple upstream elements to be produced from a single continuous column. The obstruction element extending from the upstream end of the upstream element to the downstream end of the upstream element can simplify the assembly of the aerosol generating article, as the orientation in which the upstream element is mounted on the aerosol generating article can be immaterial.

[0131] When the upstream element is in the initial state, the obstruction element can cover the longitudinal airflow channel to prevent Petition 870250083197, dated 09 / 16 / 2025, page 34 / 80 30 / 63 substantially the airflow through the longitudinal airflow channel. For example, the obstruction element may be provided as an obstruction layer at the upstream end of the upstream element, such as an obstruction layer on the upstream end face of an upstream plug of the upstream element. As another example, the obstruction element may be provided as an obstruction layer at the downstream end of the upstream element, such as an obstruction layer on the downstream end face of an upstream plug of the upstream element.

[0132] When the upstream element comprises one or more longitudinal airflow channels extending through a plug upstream of the upstream element, an obstruction element provided as an obstruction layer on an end face of the upstream element may be such that each of the one or more longitudinal airflow channels is obstructed by the obstruction layer when the upstream element is in the initial state.

[0133] When the obstruction element is in the form of an obstruction layer at one end of the upstream element, the obstruction element may be a coating at one end of the upstream element. For example, the obstruction element may be provided as a coating on an end face of an upstream plug of the upstream element. The obstruction element may be sprayed onto the end face of the upstream plug of the upstream element.

[0134] When the upstream element is in the initial state, the obstruction element can be completely incorporated within another upstream element component, such as an upstream plug of the upstream element. This can help ensure that the obstruction element is contained within the upstream element one or both times when the upstream element is in the initial state and when the upstream element Petition 870250083197, dated 09 / 16 / 2025, page 35 / 80 31 / 63 change from the initial state to the final state. This can be particularly advantageous where the obstructing element is in powder form when the upstream element is in the initial state.

[0135] The longitudinal airflow channel may have a substantially circular cross-sectional shape. The longitudinal airflow channel may be substantially cylindrical.

[0136] The size of the longitudinal airflow channel can be selected based on a desired drag resistance of the upstream element in the initial state and a desired drag resistance of the upstream element in the final state. Increasing the size of the longitudinal airflow channel can increase a reduction in the drag resistance of the upstream element during the change of state from the initial to the final state. This is because when the upstream element is in the final state, the longitudinal airflow channel can provide a substantially unobstructed path for air to flow. Increasing the size of the upstream element's path substantially unobstructed when it can decrease the drag resistance of the upstream element.

[0137] The longitudinal airflow channel may have a width of at least about 0.5 millimeters, at least about 0.7 millimeters, or at least about 1 millimeter.

[0138] The longitudinal airflow channel may have a width less than or equal to about 3 millimeters, less than or equal to about 2.5 millimeters, or less than or equal to about 2 millimeters.

[0139] The longitudinal airflow channel may have a width between about 0.5 millimeters and about 3 millimeters, between about 0.5 millimeters and about 2.5 millimeters, or between about 0.5 millimeters and about 2 millimeters.

[0140] The longitudinal airflow channel may have a width between approximately 0.7 millimeters and approximately 3 millimeters, between approximately 0.7 millimeters Petition 870250083197, dated 09 / 16 / 2025, p. 36 / 80 32 / 63 and about 2.5 millimeters, or between about 0.7 millimeters and about 2 millimeters.

[0141] The longitudinal airflow channel can have a width between about 1 millimeter and about 3 millimeters, between about 1 millimeter and about 2.5 millimeters, or between about 1 millimeter and about 2 millimeters.

[0142] The longitudinal airflow channel can extend substantially along the entire length of the upstream element. The longitudinal airflow channel can extend substantially from the upstream end of the upstream element to the downstream end of the upstream element. For example, the longitudinal airflow channel can extend the entire length of an upstream plug of the upstream element. When the longitudinal airflow channel extends substantially along the entire length of the upstream element, the reduction in drag resistance of the upstream element from the initial state to the final state can be greater than in an upstream element where the longitudinal airflow channel does not extend substantially along the entire length of the upstream element.This occurs because, where the longitudinal airflow channel extends substantially the entire length of the upstream element, the upstream element in the final state may have a substantially unobstructed longitudinal airflow channel that extends substantially the entire length of the upstream element, providing a path with low resistance for air to flow.

[0143] The longitudinal airflow channel may not extend the entire length of the upstream element.

[0144] The longitudinal airflow channel may extend along at least about 20 percent of the length of the upstream element, at least about 50 percent of the length of the upstream element, or at least about 80 percent of the length of the upstream element. Petition 870250083197, dated 09 / 16 / 2025, p. 37 / 80 33 / 63

[0145] The longitudinal airflow channel may extend to the entire length of the upstream element. For example, the longitudinal airflow channel may extend to about 90 percent of the length of the upstream element or to about 80 percent of the length of the upstream element.

[0146] The longitudinal airflow channel may extend along about 20 percent to about 100 percent of the length of the upstream element, between about 50 percent to about 100 percent of the length of the upstream element, or between about 80 percent to about 100 percent of the length of the upstream element.

[0147] The longitudinal airflow channel may extend between about 20 percent and about 90 percent of the length of the upstream element, between about 50 percent and about 90 percent of the length of the upstream element, or between about 80 percent and about 90 percent of the length of the upstream element.

[0148] The longitudinal airflow channel may extend along between about 20 percent and about 80 percent of the length of the upstream element, or between about 50 percent and about 80 percent of the length of the upstream element.

[0149] The longitudinal airflow channel may have a length of at least about 1 millimeter, at least about 2.5 millimeters, or at least about 4 millimeters. The longitudinal airflow channel may have a length less than or equal to about 10 millimeters, less than or equal to about 8 millimeters, or less than or equal to about 6 millimeters. For example, the longitudinal airflow channel may have a length of about 5 millimeters.

[0150] The width, cross-sectional area, length, size, and shape of the longitudinal airflow channel discussed in this document may refer to the width, cross-sectional area, length, size, and shape of the longitudinal airflow channel when the upstream element Petition 870250083197, dated 09 / 16 / 2025, p. 38 / 80 34 / 63 is in one or both the initial and final states.

[0151] The width, cross-sectional area, length, size and shape of the longitudinal airflow channel may remain unchanged after a change of state of the upstream element from the initial state to the final state.

[0152] The upstream element may comprise a single longitudinal airflow channel. The width, cross-sectional area, length, size, and shape of the longitudinal airflow channel described in this document may apply to the single longitudinal airflow channel.

[0153] The obstruction element can substantially fill the volume of the longitudinal airflow channel.

[0154] The size and shape of the obstruction element may be substantially the same as the size and shape of the longitudinal airflow channel. This may be particularly the case where the obstruction element is located substantially entirely within the longitudinal airflow channel when the upstream element is in its initial state. The size and shape of the obstruction element being substantially the same as the size and shape of the longitudinal airflow channel may be such that the longitudinal airflow channel is obstructed by the obstruction element to substantially impede airflow through the longitudinal airflow channel when the upstream element is in its initial state.

[0155] The obstructing element may have a substantially circular cross-sectional shape. The obstructing element may be substantially cylindrical.

[0156] The obstruction element may have a width substantially equal to the width of the longitudinal airflow channel.

[0157] The obstructing element may have a width of at least about 0.5 millimeters, at least about 0.7 millimeters, or at least about 1 millimeter.

[0158] The obstructing element may have a width less than or equal to Petition 870250083197, dated 09 / 16 / 2025, p. 39 / 80 35 / 63 to approximately 3 millimeters, less than or equal to approximately 2.5 millimeters, or less than or equal to approximately 2 millimeters.

[0159] The obstructing element may have a width between about 0.5 millimeters and about 3 millimeters, between about 0.5 millimeters and about 2.5 millimeters, or between about 0.5 millimeters and about 2 millimeters.

[0160] The obstructing element may have a width between approximately 0.7 millimeters and approximately 3 millimeters, between approximately 0.7 millimeters and approximately 2.5 millimeters, or between approximately 0.7 millimeters and approximately 2 millimeters.

[0161] The obstructing element may have a width between about 1 millimeter and about 3 millimeters, between about 1 millimeter and about 2.5 millimeters, or between about 1 millimeter and about 2 millimeters.

[0162] The obstruction element may have a cross-sectional shape substantially equal to the cross-sectional shape of the longitudinal airflow channel. The obstruction element may have a cross-sectional area substantially equal to the cross-sectional area of ​​the longitudinal airflow channel.

[0163] The obstruction element may have a cross-sectional area and cross-sectional shape substantially equal to the cross-sectional area and cross-sectional shape of the longitudinal airflow channel. This may be such that the obstruction element is capable of obstructing the longitudinal airflow channel to substantially impede airflow through the longitudinal airflow channel.

[0164] The obstruction element may have a larger cross-sectional area than the longitudinal airflow channel. This may be particularly the case where the obstruction element is located at one end of the longitudinal airflow channel, for example, as a lining on an upstream end face of an upstream plug of the upstream element with the longitudinal airflow channel extending through it. The obstruction element may have a shape and cross-sectional area such that the element of Petition 870250083197, dated 09 / 16 / 2025, pp. 40 / 80 36 / 63 obstruction covers the entire end of the longitudinal airflow channel to substantially impede airflow through the longitudinal channel.

[0165] The obstruction element may have a cross-sectional area and a cross-sectional shape substantially equal to the cross-sectional area and a cross-sectional shape of an end of a plug upstream of the upstream element having the longitudinal airflow channel extending through it. Where the upstream element comprises an upstream plug, the obstruction element may be located on an end face of the upstream plug, the obstruction element having a cross-sectional area and a cross-sectional shape substantially equal to the cross-sectional area and a cross-sectional shape of the end face of the upstream plug.

[0166] The obstruction element may have a length substantially equal to the length of the longitudinal airflow channel. The obstruction element may have a length less than the length of the longitudinal airflow channel.

[0167] The obstructing element may extend substantially along the entire length of the upstream element. The obstructing element may extend substantially from the upstream end of the upstream element to the downstream end of the upstream element. For example, the obstructing element may extend the entire length of a plug upstream of the upstream element. Where the obstructing element extends substantially along the entire length of the upstream element, the reduction in drag resistance of the upstream element from the initial state to the final state may be greater than in an upstream element where the obstructing element does not extend substantially along the entire length of the upstream element. This is because, where the obstructing element extends substantially along the entire length of the upstream element, the upstream element in the final state may have a substantially unobstructed longitudinal airflow channel. Petition 870250083197, dated 09 / 16 / 2025, p. 41 / 80 37 / 63 which extends substantially throughout the entire length of the upstream element providing a low-resistance pathway for air to flow.

[0168] The obstruction element may not extend the entire length of the upstream element.

[0169] The obstruction element may extend along at least about 20 percent of the length of the upstream element, at least about 50 percent of the length of the upstream element, or at least about 80 percent of the length of the upstream element.

[0170] The obstruction element may extend to the entire length of the upstream element. For example, the obstruction element may extend to about 90 percent of the length of the upstream element or to about 80 percent of the length of the upstream element.

[0171] The obstruction element may extend along from about percent to about 100 percent of the length of the upstream element, between about 50 percent and about 100 percent of the length of the upstream element, or between about 80 percent and about 100 percent of the length of the upstream element.

[0172] The obstruction element may extend between about 20 percent and about 90 percent of the length of the upstream element, between about 50 percent and about 90 percent of the length of the upstream element, or between about 80 percent and about 90 percent of the length of the upstream element.

[0173] The obstruction element may extend along between about 20 percent and about 80 percent of the length of the upstream element, or between about 50 percent and about 80 percent of the length of the upstream element.

[0174] The obstructing element may have a length of at least about 1 millimeter, at least about 2.5 millimeters, or at least about 4 millimeters. The obstructing element may have a length less than or equal to about 10 millimeters, less than or equal to about Petition 870250083197, dated 09 / 16 / 2025, p. 42 / 80 38 / 63 millimeters, or less than or equal to about 6 millimeters. For example, the obstruction element may have a length of about 5 millimeters.

[0175] When the obstruction element is in the form of a powder, the width, cross-sectional area, length, size, and shape of the obstruction element may refer to the width, cross-sectional area, length, size, and shape of the volume occupied by the powder, respectively.

[0176] The width, cross-sectional area, length, size and shape of the obstruction element discussed in this document refer to the width, cross-sectional area, length and shape of the obstruction element when the upstream element is in its initial state, unless otherwise indicated.

[0177] The upstream element may comprise a plurality of longitudinal airflow channels. The longitudinal airflow channel properties discussed above may be applicable to each of the plurality of longitudinal airflow channels.

[0178] The upstream element may comprise a plurality of obstruction elements. The properties of the obstruction element discussed above may be applicable to each of the plurality of obstruction elements.

[0179] The upstream element may comprise a plurality of longitudinal airflow channels and a plurality of corresponding obstruction elements. For example, the upstream element may comprise three longitudinal airflow channels and three corresponding obstruction elements.

[0180] When the upstream element is in the initial state, each of the plurality of longitudinal airflow channels can be obstructed by a corresponding obstruction element to substantially impede airflow through each of the plurality of longitudinal airflow channels.

[0181] When the upstream element is in the final state, each of Petition 870250083197, dated 09 / 16 / 2025, p. 43 / 80 39 / 63 A plurality of longitudinal airflow channels may be at least partially opened to allow airflow through the longitudinal airflow channel.

[0182] The upstream element may comprise an upstream plug. The longitudinal airflow channel of the upstream element may be defined within the upstream plug. The longitudinal airflow channel of the upstream element may extend through the upstream plug. The longitudinal airflow channel of the upstream element may extend from the upstream end of the upstream plug to the downstream end of the upstream plug.

[0183] The upstream plug of the upstream element may be formed from one or more of the following: a paper-based material, such as paper and cardboard; a polymeric material, such as polylactic acid; and any other cellulose-based material, such as cellulose acetate.

[0184] The upstream plug of the upstream element may be a cellulose acetate fiber plug.

[0185] The upstream element may have a length of at least about 2 millimeters, at least about 3 millimeters, or at least about 4 millimeters. The upstream element may have a length less than or equal to 10 millimeters, less than or equal to 8 millimeters, or less than or equal to 6 millimeters. For example, the upstream element may have a length of about 5 millimeters.

[0186] The length of the upstream element can be selected based on a desired RTD of the upstream element in one or both of the initial and final states. The length of the upstream element can be selected based on a desired total length of the aerosol-generating article.

[0187] The upstream element may have a substantially circular cross-sectional shape. Petition 870250083197, dated 09 / 16 / 2025, page 44 / 80 40 / 63

[0188] The upstream element may have an outside diameter of at least about 5 millimeters, about 6 millimeters, or about 7 millimeters. The upstream element may have an outside diameter less than or equal to 12 millimeters, less than or equal to about 10 millimeters, or less than or equal to about 8 millimeters. For example, the upstream element may have an outside diameter of about 7.3 millimeters.

[0189] The upstream element may have an outer diameter substantially equal to the outer diameter of the aerosol-generating substrate. The upstream element may have an outer diameter substantially equal to the outer diameter of the aerosol-generating article.

[0190] The upstream element is located upstream of the aerosol-generating substrate. The upstream element may touch the aerosol-generating substrate. The upstream element may be located at the upstream end of the aerosol-generating article.

[0191] The aerosol-generating article may comprise one or more additional elements located upstream of the upstream element.

[0192] The aerosol-generating substrate may be in the form of a column. As used in this document in reference to the present invention, the term column is used to denote a generally cylindrical element with a substantially circular, oval, or elliptical cross-section.

[0193] The aerosol-generating substrate may comprise an aerosol-generating material enclosed within an envelope, such as an upstream plug wrapper. For example, the aerosol-generating substrate may comprise an aerosol-generating material enclosed within an envelope to form a column.

[0194] The aerosol-generating substrate may have a length of at least about 8 millimeters, at least about 9 millimeters, or at least about 10 millimeters. The aerosol-generating substrate may have a length less than or equal to about 16 millimeters, less than or Petition 870250083197, dated 09 / 16 / 2025, page 45 / 80 41 / 63 equals approximately 15 millimeters or less than or equal to approximately 14 millimeters. For example, the aerosol-generating substrate may have a length of approximately 12 millimeters.

[0195] The aerosol-generating substrate may have a substantially circular cross-sectional shape.

[0196] The aerosol-generating substrate may have an outer diameter of at least about 5 millimeters, about 6 millimeters, or about 7 millimeters. The aerosol-generating substrate may have an outer diameter less than or equal to about 12 millimeters, or less than or equal to about 10 millimeters, or less than or equal to about 8 millimeters. For example, the aerosol-generating substrate may have an outer diameter of about 7.3 millimeters.

[0197] The RTD of the aerosol-generating substrate may be at least millimeters of H2O, at least about 5 millimeters of H2O, or at least 6 millimeters of H2O. The RTD of the aerosol-generating substrate may be less than or equal to about 10 millimeters of H2O, less than or equal to about 9 millimeters of H2O, or less than or equal to about 8 millimeters of H2O.

[0198] The aerosol-generating substrate can be a solid aerosol-generating substrate.

[0199] The aerosol-generating substrate may comprise an aerosol former.

[0200] The aerosol former may be any known suitable compound or mixture of compounds which, in use, facilitates the formation of a dense and stable aerosol. Suitable aerosol formers are for example: polyhydric alcohols such as, for example, triethylene glycol, 1,3-butanediol, propylene glycol and glycerin; esters of polyhydric alcohols such as, for example, glycerol mono-, di- or triacetate; aliphatic esters of mono-, di- or polycarboxylic acids such as, for example, dodecanedioate of Petition 870250083197, dated 09 / 16 / 2025, page 46 / 80 42 / 63 dimethyl and dimethyl tetradecanodioate; and combinations thereof. Preferably, the aerosol former comprises one or more of glycerin and propylene glycol. The aerosol former may consist of glycerin or propylene glycol or a combination of glycerin and propylene glycol.

[0201] The aerosol-generating substrate may comprise at least about 5 percent, at least about 10 percent, or at least about 12 percent by weight of aerosol former based on the dry weight of the aerosol-generating substrate. The aerosol-generating substrate may comprise less than or equal to about 30 percent, less than or equal to about 25 percent, or less than or equal to about 20 percent by weight of aerosol former based on the dry weight of the aerosol-generating substrate.

[0202] The aerosol-generating substrate may comprise a plurality of pieces of tobacco material. As used in this document in reference to the present invention, the term piece means an element with a length substantially greater than its width and thickness.

[0203] The aerosol-generating substrate may comprise a plurality of pellets or granules of tobacco material.

[0204] The aerosol-generating substrate may comprise one or more sheets of tobacco material. One or more sheets of tobacco material may have been crimped, folded, bundled, and pleated.

[0205] The tobacco material may be homogenized tobacco material. As used in this document in reference to the present invention, the term homogenized tobacco material is used to describe material formed by the agglomeration of particulate tobacco material.

[0206] The aerosol-generating article may comprise a susceptor. As used in this document with reference to the present invention, the Petition 870250083197, dated 09 / 16 / 2025, page 47 / 80 43 / 63 The term susceptor refers to a material that can convert electromagnetic energy into heat. When located within a varying electromagnetic field, eddy currents induced in the susceptor cause heating of the susceptor.

[0207] The susceptor is arranged in thermal contact with the aerosol-generating substrate. Thus, when the susceptor heats up, the aerosol-generating substrate is heated by the susceptor to generate an aerosol. The susceptor may be arranged in direct physical contact with the aerosol-generating substrate.

[0208] The susceptor may be located within the aerosol-generating substrate.

[0209] The susceptor may be formed from any material that can be inductively heated to a temperature sufficient to generate an aerosol from the aerosol-generating substrate. For example, the susceptor may comprise metal or carbon. The susceptor may comprise or consist of a ferromagnetic material, for example, a ferromagnetic alloy, ferritic iron, or a ferromagnetic steel or stainless steel. A suitable susceptor may be or comprise aluminum.

[0210] The aerosol-generating article may comprise a downstream section located downstream of the aerosol-generating substrate. The downstream section may be located immediately downstream of the aerosol-generating substrate. The downstream section may extend between the aerosol-generating substrate and the downstream end of the aerosol-generating article.

[0211] The aerosol-generating article may comprise one or more elements provided downstream of the aerosol-generating substrate. When present, one or more elements located downstream of the aerosol-generating substrate form the downstream section of the aerosol-generating article.

[0212] One or more elements may be in an end-to-end adjacent relationship with each other.

[0213] The length of the downstream section may be at least 20 Petition 870250083197, dated 09 / 16 / 2025, pp. 48 / 80 44 / 63 millimeters, or at least 25 millimeters or at least 30 millimeters. A downstream section length may be less than 70 millimeters, or less than 60 millimeters, or less than 50 millimeters.

[0214] The aerosol-generating article may comprise a nozzle element located downstream of the aerosol-generating substrate. The aerosol-generating article may comprise a downstream section comprising a nozzle element. The nozzle element may be located at the downstream end of the aerosol-generating article.

[0215] The nozzle element may be a nozzle filter element. The nozzle element may comprise at least one filter segment for filtering the aerosol generated by heating the aerosol-generating substrate. For example, the nozzle element may comprise one or more segments of a fibrous filter material. Suitable fibrous filter materials are known in the art. At least one nozzle filter segment may comprise a cellulose acetate filter segment formed from cellulose acetate fiber.

[0216] Each of at least one filter segment can be a solid plug. That is, each of at least one filter segment can be non-tubular.

[0217] The nozzle element may consist of a single filter segment. The nozzle element may include two or more filter segments aligned axially in an adjacent end-to-end relationship with each other.

[0218] The nozzle element may comprise a flavoring, which may be provided in any suitable form. For example, the nozzle element may comprise one or more capsules, granules or pellets of a flavoring, or one or more aroma-laden threads or filaments.

[0219] Parameters or characteristics described in this document in relation to the nozzle element as a whole may also be applied to a filter segment of the nozzle element. Petition 870250083197, dated 09 / 16 / 2025, page 49 / 80 45 / 63

[0220] The nozzle element may have an RTD of at least about millimeters of H2O. The nozzle element may have an RTD less than or equal to about 25 millimeters of H2O, less than or equal to about 20 millimeters of H2O, or less than or equal to about 15 millimeters of H2O.

[0221] The nozzle element may have a length of at least about 3 millimeters, or at least about 5 millimeters. The length of the nozzle element may be less than or equal to about 11 millimeters, or less than or equal to about 9 millimeters. For example, the nozzle element may have a length of about 7 millimeters.

[0222] The nozzle element may have a substantially circular cross-sectional shape.

[0223] The nozzle element may have an outer diameter substantially equal to the outer diameter of the aerosol-generating substrate. The nozzle element may have an outer diameter substantially equal to the outer diameter of the aerosol-generating article.

[0224] The nozzle element may be enclosed by an upstream plug housing.

[0225] The nozzle element may not be vented so that air does not enter the aerosol-generating article along the nozzle element.

[0226] The nozzle element can be connected to one or more of the adjacent components of the aerosol generating article by means of a nozzle housing.

[0227] The aerosol-generating article may include a mouth-end cavity at the downstream end of the aerosol-generating article. The aerosol-generating article may comprise a downstream section comprising a mouth-end cavity.

[0228] The mouth end cavity may be downstream of the nozzle element, when present.

[0229] The mouth end cavity can be defined by an element Petition 870250083197, dated 09 / 16 / 2025, pages 50 / 80 46 / 63 hollow tubular element provided at the downstream end of the nozzle. Alternatively, the mouth end cavity may be defined by an outer casing of the nozzle element, wherein the outer casing extends in a downstream direction from the nozzle element.

[0230] The aerosol-generating article may comprise one or more intermediate elements between the aerosol-generating substrate and the nozzle element. One or more intermediate elements may be in an adjacent end-to-end relationship to each other.

[0231] One or more intermediate elements may abut the downstream end of the aerosol-generating substrate. One or more intermediate elements may abut the upstream end of the nozzle element. For example, where there is a single intermediate element, the single intermediate element may abut either the downstream end of the aerosol-generating substrate or the upstream end of the nozzle element. For example, where there is a plurality of intermediate elements, one intermediate element may abut the downstream end of the aerosol-generating substrate and another intermediate element may abut the upstream end of the nozzle element.

[0232] At least one of the one or more intermediate elements may be a tubular element. The one or more intermediate elements may be one or more tubular elements.

[0233] The tubular element comprises a tubular body. The tubular body defines a cavity that extends from the upstream end of the tubular body to the downstream end of the tubular body.

[0234] As used in this document, the term tubular element is used to indicate a generally cylindrical element that defines a lumen or airflow passage along its longitudinal axis. In particular, the term tubular will be used hereafter with reference to a tubular element having a tubular body with a substantially cylindrical cross-section and defining at least one airflow conduit that establishes Petition 870250083197, dated 09 / 16 / 2025, pp. 51 / 80 47 / 63 an uninterrupted fluid communication between an upstream end of the tubular body and a downstream end of the tubular body. However, it will be understood that alternative geometries (e.g., alternative cross-sectional shapes) of the tubular body may be possible.

[0235] In the context of the present invention, the tubular body of the tubular element provides an unrestricted flow channel. This means that the tubular body of the tubular element provides a negligible level of drag resistance (RTD). As used in this document in reference to the present invention, the term “negligible RTD level” is used to describe an RTD of less than 1 mm H2O per 10 mm of tubular body length, less than 0.4 mm H2O per 10 mm of tubular body length, or less than 0.1 mm H2O per 10 mm of tubular body length. The flow channel must therefore be free of any components that may obstruct airflow in a longitudinal direction. Preferably, the flow channel is substantially empty. In this case, the tubular body of the tubular element defines an empty cavity.

[0236] A tubular element may comprise a bent end portion forming a first end wall at the first end of the tubular body, the first end wall delimiting an opening for airflow between the cavity of the tubular body and the exterior of the second tubular element. The first end of the tubular body may be the upstream end of the tubular body. The first end wall may be referred to as the upstream end wall. The first end wall may be at the upstream end of the tubular element.

[0237] A tubular element may comprise a bent end portion forming a second end wall at the second end of the tubular body, the second end wall delimiting an opening for airflow between the cavity of the tubular body and the exterior of the second tubular element. The second end of the tubular body may Petition 870250083197, dated 09 / 16 / 2025, page 52 / 80 48 / 63 being the downstream end of the tubular body. The second end wall can be called the downstream end wall. The second end wall may be at the downstream end of the tubular element.

[0238] The tubular element may not comprise a bent end portion.

[0239] The tubular body of the tubular element may extend from the upstream end of the tubular element to the downstream end of the tubular element. That is, the tubular body may extend the entire length of the tubular element.

[0240] One or more intermediate elements may have a total length of at least about 10 millimeters, at least about 12 millimeters, or at least about 15 millimeters. One or more intermediate elements may have a length less than or equal to about 30 millimeters, less than or equal to about 25 millimeters, or less than or equal to about 23 millimeters. For example, one or more intermediate elements may have a total length of about 21 millimeters.

[0241] When the aerosol-generating article comprises a single intermediate element, the total length of one or more intermediate elements shall be the length of the single intermediate element. When the aerosol-generating article comprises a plurality of intermediate elements, the total length of one or more intermediate elements is the sum of the lengths of each of the plurality of intermediate elements.

[0242] Each of the one or more intermediate elements may have a substantially circular cross-sectional shape.

[0243] Each of the one or more intermediate elements may have an outer diameter substantially equal to the outer diameter of the aerosol-generating substrate. Each of the one or more intermediate elements may have an outer diameter substantially equal to the outer diameter of the aerosol-generating article. Petition 870250083197, dated 09 / 16 / 2025, page 53 / 80 49 / 63

[0244] One or more of the intermediate elements may be formed from any suitable material or combination of materials. For example, at least one of the one or more intermediate elements may be formed from one or more materials selected from the group consisting of: cellulose acetate; a paper-based material such as paper or cardboard; and polymeric materials such as low-density polyethylene (LDPE). Other suitable materials include polyhydroxyalkanoate (PHA) fibers.

[0245] The aerosol-generating article may comprise a vent zone. The aerosol-generating article may comprise a downstream section and a vent zone at a location along the downstream section. Satisfactory cooling of the aerosol stream generated by heating the aerosol-generating substrate and aspirating it through one or more intermediate elements can be achieved by providing a vent zone at a location along the downstream section. A vent zone can provide particularly efficient cooling of the generated aerosol before distribution to a user. Without wanting to get bogged down in theory, the temperature drop caused by the admission of cooler outside air from the center of a downstream section through the vent zone can have an advantageous effect on the nucleation and growth of aerosol particles.

[0246] The aerosol-generating article may comprise a tubular element at a location downstream of the aerosol-generating substrate and a vent zone provided at a location along the tubular element. The vent zone may comprise a plurality of perforations through a tubular wall of the tubular element.

[0247] A ventilation zone may be provided at a location along one or more intermediate elements. The ventilation zone may be provided at a location along at least one of the one or more intermediate elements. When one or more intermediate elements are one or more tubular elements, the ventilation zone may be provided at a Petition 870250083197, dated 09 / 16 / 2025, pp. 54 / 80 50 / 63 location along at least one or more tubular elements. When one or more intermediate elements are one or more tubular elements, the ventilation zone may comprise a plurality of perforations through a tubular wall of at least one or more tubular elements.

[0248] The vent zone may comprise at least one circumferential row of perforations. The vent zone may comprise two circumferential rows of perforations. Each circumferential row of perforations may comprise from 8 to 30 perforations. For example, the perforations may be formed in a line during the manufacture of the aerosol-generating article.

[0249] The aerosol-generating item may have a total length of at least about 35 millimeters, at least about 38 millimeters, at least about 40 millimeters, or at least about 42 millimeters. The aerosol-generating item may have a total length less than or equal to about 100 millimeters, less than or equal to about 70 millimeters, less than or equal to about 60 millimeters, or less than or equal to 50 millimeters. For example, the aerosol-generating item may have a total length of about 45 millimeters.

[0250] Preferably, the aerosol-generating item has a substantially circular cross-section.

[0251] The aerosol-generating article may have an outer diameter of at least about 5 millimeters, or at least about 6 millimeters, or at least about 7 millimeters. The aerosol-generating article may have an outer diameter of less than or equal to about 12 millimeters, or less than or equal to about 10 millimeters, or less than or equal to about 8 millimeters. For example, the aerosol-generating article may have an outer diameter of about 7.3 millimeters.

[0252] According to a second aspect of the present invention, an aerosol generating system is provided comprising: a generating article Petition 870250083197, dated 09 / 16 / 2025, pp. 55 / 80 51 / 63 of aerosol according to the first aspect of the present invention; and an aerosol generating device configured to heat the aerosol generating substrate of the aerosol generating article, wherein the aerosol generating device comprises a compartment defining a cavity configured to receive the aerosol generating article.

[0253] The upstream element of the aerosol-generating article may be heated by the aerosol-generating device during the use of the aerosol-generating article. In particular, the obstruction element of the upstream element of the aerosol-generating article may be heated by the aerosol-generating device during the use of the aerosol-generating article.

[0254] Preferably, the aerosol-generating article is heated indirectly by the aerosol-generating device. The aerosol-generating device is configured to heat the aerosol-generating substrate of the aerosol-generating device. During the use of the aerosol-generating article with the aerosol-generating device, the aerosol-generating substrate of the aerosol-generating device is heated. The heat from the aerosol-generating substrate can be conducted to the upstream element so that the upstream element changes state from the initial state to the final state, for example, after the melting of the obstruction element.

[0255] The aerosol generating device may be a portable aerosol generating device.

[0256] The aerosol generating device may be an electrically operated aerosol generating device. The aerosol generating device may comprise a power supply and electronic control components. The aerosol generating device may comprise a battery and electronic control components.

[0257] The aerosol generating device can be configured to externally heat the aerosol generating substrate of the aerosol generating article. That is, the aerosol generating device can be configured to heat the aerosol generating substrate of the aerosol generating article. Petition 870250083197, dated 09 / 16 / 2025, pp. 56 / 80 52 / 63 from an exterior of the aerosol-generating substrate of the aerosol-generating article.

[0258] The aerosol generating device may comprise a heating element, for example, an external heating element. The heating element may be located around a perimeter of the cavity. The heating element may be one or both of a resistance heating element and an induction heating element.

[0259] The aerosol generating device may comprise a nozzle.

[0260] Below is provided a non-exhaustive list of non-limiting examples. Any one or more of the features in these examples may be combined with any one or more features of another example, or modality, or aspect described in this document. EX1: An aerosol-generating article comprising: an aerosol-generating substrate; an upstream element located upstream of the aerosol-generating substrate, the upstream element comprising a longitudinal airflow channel and an obstruction element for obstructing the longitudinal airflow channel, wherein the upstream element is configured to change state upon heating during use of the aerosol-generating article from: an initial state, wherein the longitudinal airflow channel is obstructed by the obstruction element to substantially impede airflow through the longitudinal airflow channel, to a final state, wherein the longitudinal airflow channel is at least partially opened to allow airflow through the longitudinal airflow channel. EX2: An aerosol-generating article, according to EX1, in which the upstream element has a lower inhalation resistance in the final state than in the initial state. EX3: An aerosol-generating article, according to any previous example, where the obstructing element has a lower viscosity. Petition 870250083197, dated 09 / 16 / 2025, pp. 57 / 80 53 / 63 when the upstream element is in its final state compared to when the upstream element is in its initial state. EX4: An aerosol-generating article, according to any previous example, where the obstruction element is configured to melt during the state change of the upstream element from the initial state to the final state. EX5: An aerosol-generating article, according to any previous example, where the obstructing element has a melting point between about 40 degrees Celsius and about 220 degrees Celsius. EX6: An aerosol-generating article, according to any previous example, wherein the obstructing element is in the form of a compressed powder when the upstream element is in the initial state. EX7: An aerosol-generating article according to any previous example, wherein the obstructing element comprises a wax. EX8: An aerosol-generating article, according to any previous example, wherein the obstructing element comprises one or more of: stearin, paraffin, glycerin, gum arabic and a sugar. EX9: An aerosol-generating article, according to any previous example, wherein the drag resistance of the upstream element in the final state is less than the drag resistance of the upstream element in the initial state by at least about 20 percent. EX10: An aerosol-generating article, according to any previous example, wherein the drag resistance of the upstream element in the final state is less than the drag resistance of the upstream element in the initial state by at least about 5 millimeters of H2O. EX11: An aerosol-generating article according to any previous example, wherein the drag resistance of the upstream element in the initial state is at least about 15 millimeters of H2O. EX12: An aerosol-generating article according to any previous example, where the drag resistance of the upstream element in the final state Petition 870250083197, dated 09 / 16 / 2025, pp. 58 / 80 54 / 63 is less than or equal to approximately 25 millimeters of H2O. EX13: An aerosol-generating article, according to any previous example, in which the overall drag resistance of the aerosol-generating article when the upstream element is in the final state is less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state. EX14: An aerosol-generating article, according to any previous example, in which the overall drag resistance of the aerosol-generating article when the upstream element is in the final state is less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by at least about 5 percent. EX15: An aerosol-generating article, according to any previous example, wherein the overall drag resistance of the aerosol-generating article when the upstream element is in the final state is less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by at least about 5 millimeters of H2O. EX16: An aerosol-generating article according to any previous example, wherein the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state is at least about 40 millimeters of H2O. EX17: An aerosol-generating article according to any previous example, wherein the overall drag resistance of the aerosol-generating article when the upstream element is in the final state is less than or equal to about 80 millimeters of H2O. EX18: An aerosol-generating article, according to any previous example, in which the ventilation level of the aerosol-generating article when the upstream element is in the final state is lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state. Petition 870250083197, dated 09 / 16 / 2025, pp. 59 / 80 55 / 63 EX19: An aerosol-generating article, according to any previous example, in which a venting level of the aerosol-generating article when the upstream element is in the final state is lower than a venting level of the aerosol-generating article when the upstream element is in the initial state by at least about 4 percentage points. EX20: An aerosol-generating item according to any previous example, where the aerosol-generating item has a ventilation level of at least about 30 percent when the upstream element is in the initial state. EX21: An aerosol-generating item according to any previous example, where the aerosol-generating item has a ventilation level less than or equal to about 60 percent when the upstream element is in the final state. EX22: An aerosol-generating article, according to any previous example, wherein the obstructing element is located substantially entirely in the longitudinal airflow channel when the upstream element is in the initial state. EX23: An aerosol-generating article, according to any one of EX1 to EX21, wherein the obstructing element is located outside the longitudinal airflow channel when the upstream element is in the initial state. EX24: An aerosol-generating article, according to any previous example, wherein the upstream element is located at the upstream end of the aerosol-generating article. EX25: An aerosol-generating article, according to any previous example, wherein the longitudinal airflow channel has a width of at least about 0.5 millimeters. EX26: An aerosol-generating article, according to any previous example, where the longitudinal airflow channel extends the entire length of the upstream element. Petition 870250083197, dated 09 / 16 / 2025, pp. 60 / 80 56 / 63 EX27: An aerosol-generating article, according to any previous example, wherein the obstructing element has a cross-sectional shape substantially equal to the cross-sectional shape of the longitudinal airflow channel. EX28: An aerosol-generating article, according to any previous example, where the obstructing element extends the entire length of the upstream element. EX29: An aerosol-generating article, according to any previous example, wherein the upstream element comprises a plurality of longitudinal airflow channels and a plurality of obstruction elements. EX30: An aerosol-generating article, according to any previous example, wherein the upstream element comprises an upstream plug and wherein the longitudinal airflow channel is defined within the upstream plug. EX31: An aerosol-generating article, according to any previous example, further comprising a ventilation zone located downstream of the aerosol-generating substrate. EX32: An aerosol-generating article according to EX31, further comprising a tubular element located downstream of the aerosol-generating substrate, and wherein the ventilation zone is provided at a location along the tubular element. EX33: An aerosol generating system comprising: an aerosol generating article according to any previous example, and an aerosol generating device configured to heat the aerosol generating substrate of the aerosol generating article, wherein the aerosol generating device comprises a compartment defining a cavity configured to receive the aerosol generating article.

[0261] The present invention will be further described, by way of example only, with reference to the accompanying figures, in which: Petition 870250083197, dated 09 / 16 / 2025, pp. 61 / 80 57 / 63 Figure 1 shows a schematic side sectional view of an aerosol generating article according to the first aspect of the present invention, comprising an upstream element in an initial state; Figure 2 shows a schematic side-sectional view of the aerosol-generating article shown in Figure 1 after a change of state of the upstream element from the initial state to a final state; Figure 3 shows a schematic side perspective view of the upstream element in the initial state shown in Figure 1; Figure 4 shows a schematic side cutaway view of part of an aerosol generating system according to the second aspect of the present invention, comprising: an aerosol generating article according to the first aspect of the present invention having an upstream element and an aerosol generating device; Figure 5 shows a schematic side perspective view of the upstream element of the aerosol-generating article shown in Figure 4; Figure 6 shows a schematic side perspective view of another upstream element for an aerosol generating article according to the first aspect of the present invention; and Figure 7 shows a schematic side perspective view of another upstream element for an aerosol generating article according to the first aspect of the present invention.

[0262] Figure 1 shows an aerosol generating article 100 comprising an aerosol generating substrate 10, an upstream element 20 located upstream of the aerosol generating substrate 10 and a downstream section 30 located downstream of the aerosol generating substrate 10 and extending to a downstream end of the aerosol generating article.

[0263] The downstream section 30 comprises a tubular element 32 that abuts the downstream end of the aerosol-generating substrate 10. The downstream section 30 also comprises a filter element 34 located Petition 870250083197, dated 09 / 16 / 2025, pp. 62 / 80 58 / 63 downstream and adjacent to tubular element 32. Filter element 34 comprises a cellulose acetate fiber plug.

[0264] The aerosol generating article also comprises a ventilation zone located along the downstream section 30. In particular, the ventilation zone is located along the tubular element 32. The ventilation zone comprises a circumferential row of perforations or holes 40 extending through a tubular wall of the tubular element 32 in order to allow airflow into the internal cavity defined by the tubular element 32 from the outside of the aerosol generating article 100.

[0265] The upstream element 20 extends from an upstream end of the aerosol-generating article and abuts the upstream end of the aerosol-generating substrate 10.

[0266] The upstream element 20 is configured to change state upon heating during the use of the aerosol generating article 100 from an initial state (as shown in Figure 1) to a final state (as shown in Figure 2).

[0267] The upstream element 20 comprises a cellulose acetate fiber plug 22, a longitudinal airflow channel 24 defined within the cellulose acetate fiber plug 22, and an obstruction element 26.

[0268] In the initial state (as shown in Figures 1 and 3), the longitudinal airflow channel 24 is obstructed by the obstruction element 26 to substantially impede airflow through the longitudinal airflow channel 24. The obstruction element 26 is located substantially entirely within the longitudinal airflow channel 24. The obstruction element 26 has substantially the same size and shape as the longitudinal airflow channel 24. The obstruction element 26 extends from the upstream end of the upstream element 20 to the downstream end of the upstream element 20. The obstruction element 26 is a solid column. In particular, the obstruction element 26 is a solid column of compressed stearin powder.In some other examples, the element of. Petition 870250083197, dated 09 / 16 / 2025, pp. 63 / 80 59 / 63 obstruction may be in the form of loose dust.

[0269] The longitudinal airflow channel 24 is substantially cylindrical and has a diameter of about 1.5 millimeters. Consequently, the obstruction element 24 is also substantially cylindrical and has a diameter of about 1.5 millimeters.

[0270] In the final state (as shown in Figure 2), the longitudinal airflow channel 24 is open to allow airflow through the longitudinal airflow channel 24.

[0271] After heating during use of the aerosol generating article 100, the upstream element 22 changes state from the initial state to the final state. In particular, after heating during the use of the aerosol generating article 100, the obstruction element 26 is heated so that it melts and flows and is absorbed by the cellulose acetate fiber plug 22. Consequently, the longitudinal airflow channel 24 may be substantially empty when the upstream element 20 is in the final state.

[0272] As such, after heating during the use of the aerosol generating article 100 and in a change of state of the upstream element 20 from the initial state to the final state, the drag resistance of the upstream element 20 decreases. After heating during the use of the aerosol generating article 100, the overall drag resistance of the aerosol generating article 100 also decreases.

[0273] After a reduction in the drag resistance of the upstream element 20 in a state change of the upstream element 20 from the initial state to the final state, the ventilation level of the aerosol-generating article 100 also decreases. The aerosol-generating article 100 having a high ventilation level when the upstream element 20 is in the initial state and a lower ventilation level when the upstream element 20 is in the final state may mean that the aerosol generated during the initial few drags by a user is cooled to a greater extent than the aerosol generated during subsequent drags by the user. This may be such that the aerosol Petition 870250083197, dated 09 / 16 / 2025, pp. 64 / 80 60 / 63 distributed to a user throughout the user experience is at an acceptable temperature.

[0274] The upstream element 22 has a length of about 5 millimeters. The aerosol generating substrate 10 has a length of about 12 millimeters. The tubular element 32 has a length of about 21 millimeters. The nozzle element 34 has a length of about 7 millimeters. Thus, the aerosol generating article has a length of about 45 millimeters.

[0275] The aerosol-generating article has an outer diameter of approximately 7.3 millimeters.

[0276] Figure 4 shows part of an aerosol generating system 1000 comprising an aerosol generating article 200 and an aerosol generating device 250. In particular, Figure 4 shows a part of the aerosol generating device 250.

[0277] In Figure 4, the aerosol generating article 200 is introduced into the cavity 254 of the aerosol generating device 250.

[0278] The aerosol generating article 200 has an upstream element 120. Figure 4 shows the aerosol generating article 200 with the upstream element 120 in an initial state.

[0279] The aerosol generating article 200 shown in Figure 4 is of substantially similar construction to the aerosol generating article 100 shown in Figures 1 and 2. Similar reference numbers are used in Figures 1, 2 and 4 to designate similar parts.

[0280] The aerosol generating substrate 10, tubular element 32, ventilation holes 40 and filter element 34 shown in Figure 4 are the same as the aerosol generating substrate 10, tubular element 32, ventilation holes 40 and filter element 34 shown in Figures 1 and 2, respectively.

[0281] The aerosol generating article 200 shown in Figure 4 differs from the aerosol generating article 100 shown in Figures 1 and 2 in that the channel Petition 870250083197, dated 09 / 16 / 2025, pages 65 / 80 61 / 63 of longitudinal airflow 124 does not extend to the upstream end or the downstream end of the upstream element 120. The longitudinal airflow channel 124 extends approximately 80 percent along the length of the upstream element 122.

[0282] Consequently, when the upstream element 120 of the aerosol generating article 200 is in the initial state, the blocking element 122 does not extend to the upstream end or the downstream end of the upstream element 120. Instead, the blocking element 122 is incorporated entirely within the cellulose acetate fiber plug 122. The blocking element 126 extends approximately 80 percent along the length of the upstream element 122. Figure 5 shows the upstream element 122 when it is in the initial state.

[0283] The aerosol generating device 250 comprises a compartment defining a cavity 254 configured to receive the aerosol generating article 200. The aerosol generating device 250 comprises an external heating element 258 for resistive heating of the aerosol generating substrate 10 of the aerosol generating article 200 during use. During use, the upstream element 120 is heated indirectly by the external heating element 258 of the aerosol generating device 250. During use, the external heating element 258 of the aerosol generating device 250 heats the aerosol generating substrate 10 of the aerosol generating article 200, and the heat from the aerosol generating substrate 10 is conducted to the upstream element 120. The upstream element 120 is heated so that the blocking element 122 melts.

[0284] The aerosol generating device 250 comprises airflow inlets 256 located at the distal end of the cavity 254, so that air can be drawn through the aerosol generating article 200 during use.

[0285] Figure 6 shows an example of another upstream element 220 in an initial state. The upstream element 220 shown in Figure 6 has Petition 870250083197, dated 09 / 16 / 2025, pages 66 / 80 62 / 63 construction substantially similar to the upstream element 20 shown in Figures 1, 2 and 3. Similar reference numbers are used in Figures 1, 2, 3 and 6 to designate similar parts.

[0286] The upstream element 220 shown in Figure 6 differs from the upstream element 20 shown in Figures 1, 2 and 3 in that the upstream element 220 comprises three longitudinal airflow channels. The longitudinal airflow channels shown in Figure 6 are of substantially similar construction to the longitudinal airflow channel 24 shown in Figures 1, 2 and 3 and also extend from the upstream end of the upstream element 220 to the downstream end of the upstream element 220.

[0287] The upstream element 220 also comprises three corresponding obstruction elements 226, each located within one of the longitudinal airflow channels.

[0288] Figure 7 shows an example of another upstream element 320 in an initial state. The upstream element 320 comprises a plurality of longitudinal airflow channels (not shown).

[0289] The upstream element 320 comprises a blocking element 326 provided as a layer located at the upstream end of the upstream element 320. In particular, the blocking element 326 is provided as a coating on an upstream end face of a cellulose acetate fiber plug 322 of the upstream element 320. The coating covers substantially the entire upstream end face of the cellulose acetate fiber plug 322.

[0290] When the upstream element 320 is in the initial state, the obstruction element 326 substantially obstructs each of the plurality of longitudinal airflow channels to substantially impede airflow through the upstream element 326.

[0291] In a state change of the upstream element 320 from the initial state to the final state, at least the majority of the channel plurality Petition 870250083197, dated 09 / 16 / 2025, pp. 67 / 80 The 63 / 63 longitudinal airflow is at least partially open to allow airflow through the longitudinal airflow channels and through the upstream element. As such, the upstream element has less drag resistance when the upstream element is in the final state than in the initial state.

[0292] The specific embodiments and examples described above illustrate, but do not limit, the invention. It should be understood that other embodiments of the invention may be realized and that the specific embodiments and examples described in this document are not exhaustive. Petition 870250083197, dated 09 / 16 / 2025, pp. 68 / 80

Claims

1 / 3 CLAIMS 1. Aerosol generating article, characterized in that it comprises: an aerosol generating substrate; an upstream element located upstream of the aerosol generating substrate, the upstream element comprising a longitudinal airflow channel and an obstruction element for obstructing the longitudinal airflow channel, wherein the upstream element is configured to change state upon heating during use of the aerosol generating article from: an initial state, in which the longitudinal airflow channel is obstructed by the obstruction element to substantially impede airflow through the longitudinal airflow channel, to a final state, in which the longitudinal airflow channel is at least partially open to allow airflow through the longitudinal airflow channel, wherein the upstream element has a lower drag resistance in the final state than in the initial state.

2. Aerosol generating article, according to claim 1, characterized in that, during the change of state of the upstream element from the initial state to the final state, the viscosity of the obstructing element decreases.

3. Aerosol-generating article, according to claim 1 or 2, characterized in that the blocking element has a melting point between about 40 degrees Celsius and about 220 degrees Celsius.

4. Aerosol-generating article, according to any one of claims 1 to 3, characterized in that the inhalation resistance of the upstream element in the final state is less than the inhalation resistance of the upstream element in the initial state by at least about 20 percent. Petition 870250083197, dated 09 / 16 / 2025, pp. 69 / 80 2 / 3 5. Aerosol generating article, according to any one of claims 1 to 4, characterized in that the drag resistance of the upstream element in the final state is less than the drag resistance of the upstream element in the final state by at least about 90 millimeters of H2O.

6. Aerosol-generating article, according to any one of claims 1 to 5, characterized in that it further comprises a ventilation zone, wherein the ventilation level of the aerosol-generating article when the upstream element is in the final state is lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state.

7. Aerosol-generating article, according to claim 6, characterized in that the ventilation level of the aerosol-generating article when the upstream element is in the final state is lower than the ventilation level of the aerosol-generating article when the upstream element is in the initial state by at least about 5 percentage points.

8. Aerosol-generating article, according to any one of claims 1 to 7, characterized in that the overall drag resistance of the aerosol-generating article when the upstream element is in the final state is less than the overall drag resistance of the aerosol-generating article when the upstream element is in the initial state by at least about 5 percent.

9. Aerosol-generating article, according to any one of claims 1 to 8, characterized in that the blocking element comprises a wax.

10. Aerosol-generating article, according to any one of claims 1 to 9, characterized in that the blocking element comprises one or more of: stearin, paraffin, glycerin, gum arabic and a sugar.

11. Aerosol-generating article, according to any of claims 1 to 10, characterized in that the obstruction element is located at the upstream end of the upstream element when the upstream element is in the initial state.

12. Aerosol-generating article, according to any one of claims 1 to 11, characterized in that the obstructing element is at least partially located in the longitudinal airflow channel when the upstream element is in the initial state.

13. Aerosol generating article, according to any one of claims 1 to 12, characterized in that the longitudinal airflow channel has a width of at least about 0.5 millimeters.

14. Aerosol generating article, according to any one of claims 1 to 13, characterized in that the upstream element comprises a cellulose acetate fiber plug and in that the longitudinal airflow channel of the upstream element extends through the cellulose acetate fiber plug.

15. Aerosol generating system, characterized in that it comprises: an aerosol generating article, as defined in any one of claims 1 to 14; and an aerosol generating device configured to heat the aerosol generating substrate of the aerosol generating article, wherein the aerosol generating device comprises a compartment defining a cavity configured to receive the aerosol generating article. Petition 870250083197, dated 09 / 16 / 2025, pp. 71 / 80

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