Aerosol-generating article configured for receiving a flavor capsule

Abstract

The invention relates to an aerosol-generating article configured for receiving a flavor capsule, the aerosol-generating article comprising an upstream end, a downstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a cooling section, the cooling section comprising a first hollow tube and a second hollow tube, and is located at the downstream end, wherein the first hollow tube is configured to provide a through hole for insertion of the flavor capsule, wherein the second hollow tube is arranged upstream from the first hollow tube and configured to contain the flavor capsule, wherein an inner diameter of the second hollow tube is larger than an inner diameter of the first hollow tube, a substrate portion containing an aerosol forming substrate, wherein the cooling section is arranged downstream from the substrate portion.

Description

[0001] AEROSOL-GENERATING ARTICLE CONFIGURED FOR RECEIVING A FLAVOR CAPSULE

[0002] The present invention relates to an aerosol-generating article configured for receiving a flavor capsule.

[0003] Aerosol-generating articles in which an aerosol-generating substrate, such as a tobacco-containing substrate, is heated rather than combusted, are known in the art. Typically, in such heated aerosol-generating articles an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate or material, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.

[0004] A number of aerosol-generating articles for consuming heated aerosol-generating articles are known in the art. Such devices include, for example, electrically heated aerosolgenerating articles in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating article to the aerosol-generating substrate of a heated aerosol-generating article. For example, electrically heated aerosol-generating articles have been proposed that comprise an internal resistive heater blade which is adapted to be inserted into the aerosol-generating substrate. As an alternative, inductively heatable aerosol-generating articles comprise a susceptor element arranged within the aerosolgenerating substrate that can be heated by an alternating magnetic field provided by the aerosol-generating article.

[0005] Heated aerosol-generating articles are typically cigarette-shaped and comprise a plurality of elements or plugs. For example, such articles typically comprise a substrate plug including an aerosol-generating substrate, a tubular plug downstream of the substrate plug and a mouthpiece filter plug at a mouth end of the article. The tubular plug has an internal cavity or empty core that defines an airflow pathway. It is known to have two tubular plugs: a first tubular plug that functions as a spacer between the substrate plug and other components of the aerosol-generating article; and a separate second tubular plug that functions as an air cooler for cooling air as it passes through the aerosol-generating article to help form an aerosol. The second tubular plug generally abuts the first tubular plug.

[0006] Consumers often enjoy flavored aerosol-generating articles for reasons including enhanced taste, masking the harshness of tobacco, perceived smoothness, personal preference, novelty, and social factors. Manufacturers have alternative methods for users to access flavors. One option is a crushable flavor capsule that users can insert into the filter section of the RRP HNB using readily available tools. However, employing such tools with current specification disrupts airflow management and alters draw resistance and filtration efficiency. Hence, there is a need to develop a new configuration that accommodates flavor capsule insertion without requiring users to damage or modify filter segments for insertion.

[0007] It is known to provide an insertion tool which first creates a hole in the filter segment of the aerosol-generating article, allowing a capsule to be inserted in a second process step.

[0008] It would be desirable to provide an aerosol-generating article with enhanced consumer experience by providing a stick configuration that allows insertion of flavor capsules whilst avoiding damage to filter segment during the flavor capsule insertion process.

[0009] According to an embodiment of the invention there is provided an aerosol-generating article configured for receiving a flavor capsule. The aerosol-generating article may be configured for receiving a flavor capsule and may comprise an upstream end and a downstream end. The upstream end may be configured to be connectable to a holder for the aerosol-generating article. The aerosol-generating article may comprise a cooling section, wherein the cooling section may comprise a first hollow tube and a second hollow tube. The cooling section may be located at the downstream end. The first hollow tube may be configured to provide a through hole for insertion of the flavor capsule. The second hollow tube may be arranged upstream from the first hollow tube and may be configured to contain the flavor capsule. An inner diameter of the second hollow tube may be larger than an inner diameter of the first hollow tube. The aerosol-generating article may comprise a substrate portion containing an aerosol forming substrate, wherein the cooling section may be arranged downstream from the substrate portion.

[0010] The term “aerosol-generating article” is used herein to denote an article in which an inhalable aerosol is generated from an aerosol-generating substrate and delivered to a consumer. As used herein, the term “aerosol-generating substrate” denotes a substrate from which an aerosol can be formed or generated. For example, the aerosol-generating substrate may be capable of releasing volatile compounds upon heating to generate an aerosol. Alternatively, the aerosol-generating substrate may comprise particles that can be entrained in an airflow to generate an aerosol.

[0011] As used herein, the term “cooling section” denotes a designated portion or area within the aerosol-generating article, where the aerosol cools down. This section is specifically intended to regulate the flow of the aerosol to reduce the temperature, thereby optimizing its performance, enhancing user comfort, or achieving desired operational conditions.

[0012] As used herein, the term " hollow tube" denotes a generally hollow elongate element defining a lumen or airflow passage along a longitudinal axis thereof. In particular, the term "tube" will be used with reference to a tubular element having a substantially cylindrical cross- section and defining at least one airflow conduit establishing an uninterrupted fluid communication. However, it will be understood that alternative geometries (for example, alternative cross-sectional shapes) of the tubular element may be possible. The first and second hollow tubes may be an individual, discrete component of the aerosol-generating article.

[0013] A "through hole" refers to a passage formed within the aerosol-generating article, specifically within the first hollow tube of the cooling section. The through hole is configured to allow the insertion of the flavor capsule without damaging other components of the aerosolgenerating article. It serves as a conduit through which the flavor capsule may be introduced into the aerosol-generating article via a capsule insertion tool. The "through hole" may be configured to be arranged at the downstream end of the aerosol-generating article, wherein the first hollow tube serves as a mouth-end for the user.

[0014] As used herein, the terms “upstream” and “downstream” describe the relative positions of elements, or portions of elements, of the aerosol-generating article in relation to the direction in which the aerosol is transported through the aerosol-generating article during use.

[0015] As used herein, the terms “upstream” and “downstream” can also be referred to as “proximal” and “distal”.

[0016] According to an embodiment of the invention there is provided an aerosol-generating article configured for receiving a flavor capsule. The aerosol-generating article is configured for receiving a flavor capsule and comprises an upstream end and a downstream end. The upstream end is configured to be connectable to a holder for the aerosol-generating article. The aerosol-generating article comprises a cooling section, wherein the cooling section comprises a first hollow tube and a second hollow tube. The cooling section is located at the downstream end. The first hollow tube is configured to provide a through hole for insertion of the flavor capsule. The second hollow tube is arranged upstream from the first hollow tube and is configured to contain the flavor capsule. An inner diameter of the second hollow tube is larger than an inner diameter of the first hollow tube. The aerosol-generating article comprises a substrate portion containing an aerosol forming substrate, wherein the cooling section is arranged downstream from the substrate portion.

[0017] An aerosol-generating article which may enhance consumer experience by providing a stick configuration that allows insertion of flavor capsules whilst avoiding damage to filter segment during the flavor capsule insertion process is provided.

[0018] The inner diameter of the second hollow tube may be similar to or larger than an outer diameter of an insertable flavor capsule, such that the insertable flavor capsule may remain in the second hollow tube after insertion of the flavor capsule. The advantage of having the inner diameter of the second hollow tube similar to or larger than the outer diameter of the insertable flavor capsule is that it allows the flavor capsule to remain securely in place within the second hollow tube after insertion. This may ensure that the flavor capsule stays in position during use, preventing it from dislodging or moving within the aerosol-generating article. By maintaining the flavor capsule's position, the user may consistently experience the intended flavor enhancement throughout the duration of use without worrying about the capsule shifting or becoming dislodged. Additionally, this configuration may enhance convenience for the user, as they may easily insert the flavor capsule into the aerosol-generating article and trust that it will stay in place without the need for additional securing mechanisms.

[0019] The aerosol-generating article may further comprise a main filter, wherein the main filter may be arranged downstream from and preferably directly abutting with the substrate portion, and wherein the main filter may be arranged downstream from the cooling section.

[0020] The incorporation of a main filter into the aerosol-generating article may enhance the filtration process, removing particulate matter and potentially harmful components from the aerosol, thus improving its purity and making the inhalation experience safer. The presence of the main filter may contribute to a smoother and more enjoyable inhalation experience for users by filtering out impurities and reducing harshness. Structurally, the main filter may provide support to the device, maintaining its integrity during use. Moreover, its placement relative to the substrate portion and cooling section may optimize airflow management within the device, ensuring efficient aerosol generation and delivery to the user, allowing insertion of flavor capsules whilst avoiding damage to the main filter during the flavor capsule insertion process.

[0021] The aerosol-generating article may further comprise a front plug, wherein the front plug may be arranged upstream from the substrate portion. The inclusion of a front plug in the aerosol-generating article may provide structural support. By being positioned upstream from the substrate portion, the front plug may help to secure the substrate in place and prevent any movement or dislodging during use. This may ensure consistent aerosol generation and delivery to the user. Additionally, the front plug may contribute to the overall stability and durability of the device, enhancing its longevity and reliability.

[0022] The substrate portion may comprise a susceptor. As used herein, the term “susceptor” refers to a material that can convert electromagnetic energy into heat. When located within a fluctuating electromagnetic field, eddy currents induced in the susceptor cause heating of the susceptor.

[0023] 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.

[0024] The susceptor may be an elongate susceptor.

[0025] As used herein, the term “elongate” is used to describe a component of the aerosolgenerating article having a length greater than the width and thickness thereof.

[0026] The elongate susceptor may be arranged substantially longitudinally within the aerosolgenerating substrate. That is, the longitudinal axis of the elongate susceptor may be approximately parallel to the longitudinal axis of the aerosol-generating substrate. For example, the longitudinal axis of the elongate susceptor may be within plus or minus 10 degrees of parallel to the longitudinal axis of the aerosol-generating substrate. The elongate susceptor may be located in a radially central position within the aerosol-generating substrate, and extend along the longitudinal axis of the aerosol-generating substrate.

[0027] The susceptor may extend from the downstream end of the aerosol-generating substrate towards the upstream end of the aerosol-generating substrate.

[0028] The susceptor may extend from the upstream end of the aerosol-generating substrate towards the downstream end of the aerosol-generating substrate.

[0029] The susceptor may extend from the upstream end of the aerosol-generating substrate to the downstream end of the aerosol-generating substrate. That is, the susceptor may extend along the entire length of the aerosol-generating substrate.

[0030] The length of the susceptor may be substantially the same as the length of the aerosolgenerating substrate.

[0031] The susceptor may extend part way along the length of the aerosol-generating substrate.

[0032] The susceptor may be spaced apart from the downstream end of the aerosolgenerating substrate.

[0033] The susceptor may be spaced apart from the upstream end of the aerosol-generating substrate.

[0034] The susceptor may be spaced apart from both a downstream end and an upstream end of the aerosol-generating substrate.

[0035] The length of the susceptor may be less than the length of the aerosol-generating substrate.

[0036] The susceptor may be entirely enclosed within the aerosol-generating substrate. That is, the aerosol-generating substrate may completely surround the susceptor.

[0037] The susceptor may be in the form of a pin, rod, strip or blade.

[0038] The susceptor may have a length of at least about 5 millimetres, at least about 6 millimetres, or at least about 8 millimetres. The susceptor may have a length of less than or equal to about 15 millimetres, less than or equal to about 12 millimetres, or less than or equal to about 10 millimetres.

[0039] The susceptor may have a length of between about 5 millimetres and about 15 millimetres, between about 5 millimetres and about 12 millimetres, or between about 5 millimetres and about 10 millimetres.

[0040] The susceptor may have a length of between about 6 millimetres and about 15 millimetres, between about 6 millimetres and about 12 millimetres, or between about 6 millimetres and about 10 millimetres.

[0041] The susceptor may have a length of between about 8 millimetres and about 15 millimetres, between about 8 millimetres and about 12 millimetres, or between about 8 millimetres and about 10 millimetres.

[0042] The susceptor may have a width of at least about 1 millimetre.

[0043] The susceptor may have width of less than or equal to about 5 millimetres.

[0044] The susceptor may have a width of between about 1 millimetre and about 5 millimetres.

[0045] The susceptor may have a thickness of at least about 0.01 millimetres, or at least about 0.5 millimetres.

[0046] The susceptor may have a thickness of less than or equal to about 2 millimetres, less than or equal to about 500 micrometres, or less than or equal to about 100 micrometres.

[0047] The susceptor may have a thickness of between about 10 micrometres and about 2 millimetres, between about 10 micrometres and about 500 micrometres, or between about 10 micrometres and about 100 micrometres.

[0048] The susceptor may have a thickness of between about 0.5 millimetres and about 2 millimetres.

[0049] The susceptor may have a substantially circular cross-section.

[0050] The susceptor may have a substantially constant cross-section along the length of the susceptor.

[0051] If the susceptor has the form of a strip or blade, the strip or blade may have a rectangular shape having a width of between about 2 millimetres to about 8 millimetres, or between about 3 millimetres to about 5 millimetres. By way of example, a susceptor in the form of a strip of blade may have a width of about 4 millimetres.

[0052] If the susceptor has the form of a strip or blade, the strip or blade may have a rectangular shape and a thickness of between about 0.03 millimetres to about 0.15 millimetres, or between about 0.05 millimetres to about 0.09 millimetres. By way of example, a susceptor in the form of a strip of blade may have a thickness of about 0.07 millimetres, or about 0.06 millimetres.

[0053] 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 a metal or carbon.

[0054] 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, aluminium. The susceptor may be formed from 400 series stainless steels, for example grade 410, or grade 420, or grade 430 stainless steel. Different materials will dissipate different amounts of energy when positioned within electromagnetic fields having similar values of frequency and field strength.

[0055] Thus, parameters of the susceptor such as material type, length, width, and thickness may all be altered to provide a desired power dissipation within a known electromagnetic field. The susceptor may be heated to a temperature in excess of 250 degrees Celsius.

[0056] Suitable susceptors may comprise a non-metallic core with a metal layer disposed on the non-metallic core, for example metallic tracks formed on a surface of a ceramic core. A susceptor may have a protective external layer, for example a protective ceramic layer or protective glass layer encapsulating the susceptor. The susceptor may comprise a protective coating formed by a glass, a ceramic, or an inert metal, formed over a core of susceptor material.

[0057] The susceptor may be a multi-material susceptor and may comprise a first susceptor material and a second susceptor material.

[0058] The aerosol-generating article may further comprise a third hollow tube, wherein the third hollow tube may be arranged upstream from the cooling section.

[0059] The addition of a third hollow tube in the aerosol-generating article, positioned upstream from the cooling section, may serve as a pathway for airflow management, helping to regulate the temperature of the aerosol and ensure consistent cooling before inhalation. This helps maintain the desired temperature of the aerosol for a comfortable and enjoyable user experience. The third hollow tube may act as a reservoir for additional flavoring agents or additives like a flavor capsule, allowing for further customization of the aerosol's taste and aroma. By incorporating this feature, the aerosol-generating article may offer enhanced versatility and personalization options for users. Additionally, the positioning of the third hollow tube upstream from the cooling section may optimize the aerosol-generating article's overall airflow dynamics, contributing to efficient aerosol generation and delivery.

[0060] An inner diameter of the third hollow tube may be smaller than the inner diameter of the second hollow tube. The inner diameter of the third hollow tube being smaller than the inner diameter of the second hollow tube facilitates a controlled airflow pathway within the device. As the aerosol travels from the second hollow tube, which may contain flavor capsules or other additives, into the third hollow tube, the narrower diameter helps to maintain a consistent flow rate and pressure, optimizing the distribution of the aerosol. This ensures that the user receives a smooth and satisfying inhalation experience.

[0061] The smaller inner diameter of the third hollow tube may act as a restriction point in the airflow pathway, which may enhance the mixing of aerosol with any additional flavoring agents or additives present in the second hollow tube. This promotes thorough blending of the aerosol with the flavor components, resulting in a more uniform and flavorful vapor for the user to enjoy.

[0062] The controlled airflow pathway, facilitated by the smaller diameter of the third hollow tube, may ensure that the flavor capsule remains securely positioned within the second hollow tube. This prevents unintended movement or displacement of the flavor capsule during operation, maintaining its stability and ensuring consistent performance of the device.

[0063] The inner diameter of the third hollow tube may be equal to the inner diameter of the second hollow tube. Ensuring that the inner diameter of the third hollow tube matches that of the second hollow tube may promote consistent airflow throughout the device, which helps maintain predictable aerosol delivery to the user. This consistency may ensure a reliable user experience without fluctuations in airflow dynamics. Having equal inner diameters may facilitate efficient distribution and mixing of flavor components or additives from the second tube to the third. This may ensure that the aerosol passes through the flavoring agents uniformly, resulting in a consistent flavor experience. A uniform inner diameter may simplify the design and manufacturing process, reducing complexity and ensuring a streamlined construction for the device. Overall, matching inner diameters between the third and second hollow tubes may enhance performance, flavor delivery, and manufacturing efficiency of the aerosol-generating article.

[0064] The first hollow tube may be a hollow acetate tube. Utilizing a hollow acetate tube for the first hollow tube in the aerosol-generating article offers several advantages. Acetate is chosen for its lightweight yet durable properties, ensuring the first hollow tube can withstand the stresses of use without compromising its integrity. Additionally, acetate exhibits good heat resistance, maintaining its structural integrity even under the high temperatures generated during aerosol production. Its chemical stability ensures it does not react with the aerosol or flavoring agents, preserving the purity of the aerosol and flavor profile. Moreover, acetate's manufacturability allows for efficient production processes, contributing to cost-effectiveness and streamlined manufacturing of the aerosol-generating article. Overall, the use of a hollow acetate tube enhances the durability, heat resistance, chemical stability, and manufacturability of the device, ensuring a reliable and consistent user experience.

[0065] The second hollow tube may be a fine hollow acetate tube.

[0066] A cross-directional shape of the through hole may correspond to a cross-directional shape of the flavor capsule. Aligning the cross-directional shape of the through hole with the cross-directional shape of the flavor capsule may ensure a better fit and alignment during insertion. This alignment may enhance the seal between the capsule and the aerosolgenerating article, minimizing leakage and maintaining the integrity of the flavor profile. Additionally, it may optimize airflow dynamics within the aerosol-generating article, promoting efficient aerosol generation and delivery to the user. By reducing disruptions to airflow and ensuring a snug fit, this design choice contributes to a smoother and more enjoyable vaping experience overall.

[0067] The aerosol-generating article may comprise a filter plug wrap paper, extending from the downstream end of the aerosol-generating article to the upstream end over at least a portion of the aerosol article, and may cover a circumferential surface of the aerosol-generating article, preferably the first hollow tube, more preferably the cooling section. Incorporating a filter plug wrap paper that extends from the downstream end to the upstream end of the aerosol-generating article, particularly covering the cooling section may provide protection for the device, shielding it from external elements like dust or debris. The wrap paper may enhance the aerosol-generating article's aesthetics, potentially featuring attractive graphics or branding. Additionally, it may improve grip and comfort for users, thanks to its tactile surface. When covering the cooling section, the paper may act as insulation, helping maintain the desired temperature of the aerosol for a consistent vaping experience. Overall, the filter plug wrap paper may enhance the aerosol-generating article's protection, appearance, usability, and potentially its thermal performance, contributing to an improved user experience.

[0068] The aerosol-generating article may comprise a substrate portion wrap paper, covering a circumferential surface of the substrate portion. Providing a substrate portion wrap paper that covers the circumferential surface of the substrate portion may offer protection, shielding the substrate from external elements such as dust or moisture, thereby preserving its integrity and performance. The wrap paper may enhance the aerosol-generating article's aesthetics by allowing for the inclusion of visually appealing graphics or branding. Additionally, it may allow for customization, enabling manufacturers to cater to different consumer preferences. The wrap paper also may contribute to user comfort, providing a tactile surface that is pleasant to hold and handle. Furthermore, it may serve as a platform for branding and marketing efforts, helping to enhance brand visibility and recognition. Overall, the substrate portion wrap paper adds value to the aerosol-generating article by offering protection, improving aesthetics, enabling customization, enhancing comfort, and facilitating branding opportunities.

[0069] The second hollow tube may comprise at least one perforation allowing ambient air to be laterally drawn into the second hollow tube. Integrating at least one perforation in the second hollow tube allows ambient air to be drawn laterally into it, may help to regulate airflow within the tube, giving users more control over their vaping experience. This airflow may assist in regulating the temperature of the aerosol, preventing overheating and ensuring user comfort. The introduction of ambient air may dilute the aerosol, making it milder for inhalation, which may be preferable for some users. Additionally, perforations may prevent vacuum formation within the tube, ensuring consistent aerosol delivery and preventing device malfunctions. Overall, these perforations enhance airflow regulation, temperature control, aerosol dilution, and device reliability, leading to a more enjoyable vaping experience.

[0070] The aerosol-generating article may consist of the cooling section, the main filter, the substrate portion, the front plug and one or both of the filter plug wrap paper and the substrate portion wrap paper. The aerosol-generating article is composed of several essential components, including the cooling section, main filter, substrate portion, front plug, and optionally, either the filter plug wrap paper or the substrate portion wrap paper, or both.

[0071] The cooling section plays a crucial role in reducing the temperature of the aerosol after it is generated, ensuring a comfortable vaping experience. The main filter, situated distally from the substrate portion, filters out particulates and harmful substances from the aerosol, enhancing its purity and safety. The substrate portion houses the aerosol-forming substrate, potentially containing features like a susceptor for efficient heating. The front plug, located proximally to the substrate portion, offers structural support and helps secure the substrate within the device.

[0072] Optionally, the filter plug wrap paper and substrate portion wrap paper may cover the respective circumferential surfaces of their corresponding components. These wrap papers may provide protection, improve aesthetics, and may serve as platforms for branding, enhancing the overall appeal of the aerosol-generating article.

[0073] An aerosol-generating system may comprise a holder comprising a cavity for receiving the aerosol-generating article, aerosol-generating system may comprise a flavor capsule. The aerosol-generating system may comprise a capsule insertion tool, wherein the capsule insertion tool may be configured to insert, via the first hollow tube, the flavor capsule into the second hollow tube of the aerosol-generating article.

[0074] The aerosol-generating system comprises several components. A holder with a cavity for accommodating the aerosol-generating article, a flavor capsule, and a capsule insertion tool. The holder serves as a housing for the device, providing a secure storage space. The flavor capsule contains additives or flavoring agents, allowing users to customize the taste of their aerosol. The capsule insertion tool is configured to facilitate the insertion of flavor capsules into the aerosol-generating article. It works by inserting the capsules through the first hollow tube, delivering them into the second hollow tube of the device. Together, these components may offer users a convenient and customizable vaping experience, allowing them to enjoy their preferred flavors with ease.

[0075] The present invention provides an aerosol-generating article with enhanced consumer experience by providing a stick configuration that allows insertion of flavor capsules whilst avoiding damage to filter segment during the flavor capsule insertion process.

[0076] As used herein, the term “aerosol- or smoke-generating article” comprises conventional smoke-generating articles like conventional cigarettes or cigars. As used herein, the term “aerosol- or smoke-generating article” comprises aerosol-generating articles which comprise an aerosol-forming substrate. An aerosol-generating article may be provided to heat the aerosol-forming substrate to a temperature at which one or more components of the aerosolforming substrate are volatilised without burning the aerosol-forming substrate. The aerosolgenerating article may comprise a heating element, for example a susceptor element. The aerosol-forming substrate may be present in solid form or in liquid form. As used herein, the term “aerosol- or smoke-generating article” comprises inhaler articles, for example dry powder inhalers.

[0077] As used herein, the term ‘aerosol-forming substrate’ relates to a substrate capable of releasing volatile compounds that can form an aerosol or a vapor. Such volatile compounds may be released by heating the aerosol-forming substrate. The aerosol-forming substrate may be in solid form or may be in liquid form. The terms ‘aerosol’ and ‘vapor’ are used synonymously.

[0078] The aerosol-forming substrate may be part of the aerosol-generating article. The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosol-forming substrate may be part of a liquid held in a liquid storage portion of the aerosol-generating article. The liquid storage portion may contain a liquid aerosol-forming substrate. Alternatively or in addition, the liquid storage portion may contain a solid aerosol-forming substrate. For example, the liquid storage portion may contain a suspension of a solid aerosol-forming substrate and a liquid. Preferably, the liquid storage portion contains a liquid aerosol-forming substrate.

[0079] The aerosol-forming substrate may comprise nicotine. The nicotine-containing aerosolforming substrate may be a nicotine salt matrix.

[0080] The aerosol-forming substrate may comprise plant-based material. The aerosolforming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material including volatile tobacco flavour compounds which are released from the aerosol-forming substrate upon heating. Alternatively, the aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise homogenised plant-based material. The aerosol-forming substrate may comprise homogenised tobacco material. Homogenised tobacco material may be formed by agglomerating particulate tobacco.

[0081] The aerosol-forming substrate may comprise at least one aerosol-former. An aerosolformer is any suitable known compound or mixture of compounds that, in use, facilitates formation of a dense and stable aerosol and that is substantially resistant to thermal degradation at the temperature of operation of the device. Suitable aerosol-formers are well known in the art and include, but are not limited to: polyhydric alcohols, such as triethylene glycol, 1 ,3-butanediol and glycerine; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1 , 3-butanediol. Preferably, the aerosol former is glycerine. Where present, the homogenised tobacco material may have an aerosolformer content of equal to or greater than 5 percent by weight on a dry weight basis, and preferably from 5 percent to 30 percent by weight on a dry weight basis. The aerosol-forming substrate may comprise other additives and ingredients, such as flavourants.

[0082] As used herein, the term ‘aerosol-generating article’ refers to a device that interacts with an aerosol-generating article to generate an aerosol.

[0083] As used herein, when used in conjunction with the aerosol- or smoke-generating article or a part or portion thereof, the term ‘proximal’ refers to a user-end, or mouth-end, and the term ‘distal’ refers to the end opposite to the downstream end.

[0084] The aerosol-generating article may comprise a mouth end through which in use an aerosol exits the aerosol-generating article and is delivered to a user. The mouth end may also be referred to as the downstream end. In use, a user draws on the downstream or mouth end of the aerosol-generating article in order to inhale an aerosol generated by the aerosolgenerating article. Alternatively, a user may directly draw on an aerosol-generating article inserted into an opening at the downstream end of the aerosol-generating article. The opening at the downstream end may be an opening of the cavity. The cavity may be configured to receive the aerosol-generating article. The aerosol-generating article comprises an upstream end opposed to the downstream or mouth end. The downstream or mouth end of the aerosolgenerating article may also be referred to as the downstream end and the upstream end of the aerosol-generating article may also be referred to as the upstream end. Components, or portions of components, of the aerosol-generating article may be described as being upstream or downstream of one another based on their relative positions between the proximal, downstream or mouth end and the upstream or upstream end of the aerosol-generating article.

[0085] As used herein, an ‘aerosol-generating article’ relates to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate may be part of an aerosol-generating article, for example part of a smoking article. An aerosol-generating article may be a smoking device that interacts with an aerosol-forming substrate of an aerosolgenerating article to generate an aerosol that is directly inhalable into a user’s lungs thorough the user's mouth. An aerosol-generating article may be a holder. The device may be an electrically heated smoking device. The aerosol-generating article may comprise a housing, electric circuitry, a power supply, a heating chamber and a heating element.

[0086] As used herein with reference to the present invention, the term ‘smoking’ with reference to a device, article, system, substrate, or otherwise does not refer to conventional smoking in which an aerosol-forming substrate is fully or at least partially combusted. The aerosol-generating article of the present invention is arranged to heat the aerosol-forming substrate to a temperature below a combustion temperature of the aerosol-forming substrate, but at or above a temperature at which one or more volatile compounds of the aerosol-forming substrate are released to form an inhalable aerosol.

[0087] The aerosol-generating article may comprise electric circuitry. The electric circuitry may comprise a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of the controller. The electric circuitry may comprise further electronic components. The electric circuitry may be configured to regulate a supply of power to the heating element. Power may be supplied to the heating element continuously following activation of the aerosol-generating article or may be supplied intermittently, such as on a puff- by-puff basis. The power may be supplied to the heating element in the form of pulses of electrical current. The electric circuitry may be configured to monitor the electrical resistance of the heating element, and preferably to control the supply of power to the heating element dependent on the electrical resistance of the heating element.

[0088] The aerosol-generating article may comprise a power supply, typically a battery, within a main body of the aerosol-generating article. In one embodiment, the power supply is a Lithium-ion battery. Alternatively, the power supply may be a Nickel-metal hydride battery, a Nickel cadmium battery, or a Lithium based battery, for example a Lithium-Cobalt, a Lithium- Iron-Phosphate, Lithium Titanate or a Lithium-Polymer battery. As an alternative, the power supply may be another form of charge storage device such as a capacitor. The power supply may require recharging and may have a capacity that enables to store enough energy for one or more usage experiences; for example, the power supply may have sufficient capacity to continuously generate aerosol for a period of around six minutes or for a period of a multiple of six minutes. In another example, the power supply may have sufficient capacity to provide a predetermined number of puffs or discrete activations of the heating element.

[0089] The cavity of the aerosol-generating article may have an open end into which the aerosol-generating article is inserted. The open end may be a downstream end. The cavity may have a closed end opposite the open end. The closed end may be the base of the cavity. The closed end may be closed except for the provision of air apertures arranged in the base. The base of the cavity may be flat. The base of the cavity may be circular. The base of the cavity may be arranged upstream of the cavity. The open end may be arranged downstream of the cavity. The cavity may have an elongate extension. The cavity may have a longitudinal central axis. A longitudinal direction may be the direction extending between the open and closed ends along the longitudinal central axis. The longitudinal central axis of the cavity may be parallel to the longitudinal axis of the aerosol-generating article.

[0090] The cavity may be configured as a heating chamber. The cavity may have a cylindrical shape. The cavity may have a hollow cylindrical shape. The cavity may have a shape corresponding to the shape of the aerosol-generating article to be received in the cavity. The cavity may have a circular cross-section. The cavity may have an elliptical or rectangular crosssection. The cavity may have an inner diameter corresponding to the outer diameter of the aerosol-generating article.

[0091] The airflow channel may run through the aerosol-generating article and into the cavity. Ambient air may be drawn into the aerosol-generating article, into the cavity and towards the user through the airflow channel. Downstream of the cavity, a mouthpiece may be arranged or a user may directly draw on the aerosol-generating article. The airflow channel may extend through the mouthpiece.

[0092] In any of the aspects of the disclosure, the heating element, like a susceptor, may comprise an electrically resistive material. Suitable electrically resistive materials include but are not limited to: semiconductors such as doped ceramics, electrically "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material. Such composite materials may comprise doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum platinum, gold and silver. Examples of suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum- , tantalum-, tungsten-, tin-, gallium-, manganese-, gold- and iron-containing alloys, and superalloys based on nickel, iron, cobalt, stainless steel, Timetai® and iron-manganese-aluminium based alloys. In composite materials, the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required.

[0093] As described, in any of the aspects of the disclosure, the heating element may be part of an aerosol-generating article. The aerosol-generating article may comprise an internal heating element or an external heating element, or both internal and external heating elements, where "internal" and "external" refer to the aerosol-forming substrate. An internal heating element may take any suitable form. For example, an internal heating element may take the form of a heating blade. Alternatively, the internal heater may take the form of a casing or substrate having different electro-conductive portions, or an electrically resistive metallic tube. Alternatively, the internal heating element may be one or more heating needles or rods that run through the center of the aerosol-forming substrate. Other alternatives include a heating wire or filament, for example a Ni-Cr (Nickel-Chromium), platinum, tungsten or alloy wire or a heating plate. Optionally, the internal heating element may be deposited in or on a rigid carrier material. In one such embodiment, the electrically resistive heating element may be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal may be formed as a track on a suitable insulating material, such as ceramic material, and then sandwiched in another insulating material, such as a glass. Heaters formed in this manner may be used to both heat and monitor the temperature of the heating elements during operation.

[0094] An external heating element may take any suitable form. For example, an external heating element may take the form of one or more flexible heating foils on a dielectric substrate, such as polyimide. The flexible heating foils can be shaped to conform to the perimeter of the substrate receiving cavity. Alternatively, an external heating element may take the form of a metallic grid or grids, a flexible printed circuit board, a molded interconnect device (MID), ceramic heater, flexible carbon fibre heater or may be formed using a coating technique, such as plasma vapour deposition, on a suitable shaped substrate. An external heating element may also be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal may be formed as a track between two layers of suitable insulating materials. An external heating element formed in this manner may be used to both heat and monitor the temperature of the external heating element during operation.

[0095] As an alternative to an electrically resistive heating element, the heating element may be configured as an induction heating element. The induction heating element may comprise an induction coil and a susceptor. In general, a susceptor is a material that is capable of generating heat, when penetrated by an alternating magnetic field. When located in an alternating magnetic field. If the susceptor is conductive, then typically eddy currents are induced by the alternating magnetic field. If the susceptor is magnetic, then typically another effect that contributes to the heating is commonly referred to hysteresis losses. Hysteresis losses occur mainly due to the movement of the magnetic domain blocks within the susceptor, because the magnetic orientation of these will align with the magnetic induction field, which alternates. Another effect contributing to the hysteresis loss is when the magnetic domains will grow or shrink within the susceptor. Commonly all these changes in the susceptor that happen on a nano-scale or below are referred to as “hysteresis losses”, because they produce heat in the susceptor. Hence, if the susceptor is both magnetic and electrically conductive, both hysteresis losses and the generation of eddy currents will contribute to the heating of the susceptor. If the susceptor is magnetic, but not conductive, then hysteresis losses will be the only means by which the susceptor will heat, when penetrated by an alternating magnetic field. According to the invention, the susceptor may be electrically conductive or magnetic or both electrically conductive and magnetic. An alternating magnetic field generated by one or several induction coils heat the susceptor, which then transfers the heat to the aerosol-forming substrate, such that an aerosol is formed. The heat transfer may be mainly by conduction of heat. Such a transfer of heat is best, if the susceptor is in close thermal contact with the aerosol-forming substrate.

[0096] As used herein, the term ‘aerosol-generating article’ refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user’s lungs through the user's mouth. An aerosolgenerating article may be disposable.

[0097] As used herein, the term ‘aerosol-forming substrate’ relates to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate. An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article.

[0098] The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosolforming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds which are released from the substrate upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise an aerosol former that facilitates the formation of a dense and stable aerosol. Examples of suitable aerosol formers are glycerine and propylene glycol.

[0099] The aerosol-generating substrate preferably comprises homogenised tobacco material, an aerosol-former and water. Providing homogenised tobacco material may improve aerosol generation, the nicotine content and the flavour profile of the aerosol generated during heating of the aerosol-generating article. Specifically, the process of making homogenised tobacco involves grinding tobacco leaf, which more effectively enables the release of nicotine and flavors upon heating.

[0100] As used herein, the term "aerosol-generating system" refers to the combination of an aerosol-generating article with an aerosol-forming substrate. When the aerosol-forming substrate forms part of an aerosol-generating article, the aerosol-generating system refers to the combination of the aerosol-generating article with the aerosol-generating article. In the aerosol-generating system, the aerosol-forming substrate and the aerosol-generating article cooperate to generate an aerosol.

[0101] Below, there is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0102] Example E1 : An aerosol-generating article configured for receiving a flavor capsule, the aerosol-generating article comprising: a downstream end, an upstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a cooling section, the cooling section comprising a first hollow tube and a second hollow tube, and is located at the upstream end, wherein the first hollow tube is configured to provide a through hole for insertion of the flavor capsule, wherein the second hollow tube is arranged upstream from the first hollow tube and configured to contain the flavor capsule, wherein an inner diameter of the second hollow tube is larger than an inner diameter of the first hollow tube, a substrate portion containing an aerosol forming substrate, wherein the cooling section is arranged downstream from the substrate portion.

[0103] Example E2: The aerosol-generating article according to Example E1 , wherein the inner diameter of the second hollow tube is similar to or larger than an outer diameter of an insertable flavor capsule, such that the insertable flavor capsule remains in the second hollow tube after insertion of the flavor capsule.

[0104] Example E3: The aerosol-generating article according to any one of the preceding examples, further comprising a main filter, wherein the main filter is arranged downstream from and preferably directly abutting with the substrate portion, and wherein the main filter is arranged upstream from the cooling section.

[0105] Example E4: The aerosol-generating article according to any one of the preceding examples, further comprising a front plug, wherein the front plug is arranged upstream from the substrate portion. Example E5: The aerosol-generating article according to any one of the preceding examples, wherein the substrate portion comprises a susceptor.

[0106] Example E6: The aerosol-generating article according to any one of the preceding examples, comprising a third hollow tube, wherein the third hollow tube is arranged upstream from the cooling section.

[0107] Example E7: The aerosol-generating article according to Example E6, wherein an inner diameter of the third hollow tube is smaller than the inner diameter of the second hollow tube.

[0108] Example E8: The aerosol-generating article according to Example E6, wherein the inner diameter of the third hollow tube is equal to the inner diameter of the second hollow tube.

[0109] Example E9: The aerosol-generating article according to any one of the preceding examples, wherein the first hollow tube is a hollow acetate tube.

[0110] Example E10: The aerosol-generating article according to any one of the preceding examples, wherein the second hollow tube is a fine hollow acetate tube.

[0111] Example E11 : The aerosol-generating article according to any one of the preceding examples, wherein a cross-directional shape of the hole corresponds to a cross-directional shape of the flavor capsule.

[0112] Example E12: The aerosol-generating article according to any one of the preceding examples, wherein the aerosol-generating article comprises a filter plug wrap paper, extending from the downstream end of the aerosol-generating article to the upstream end over at least a portion of the aerosol article, and covering a circumferential surface of the aerosol-generating article, preferably the first hollow tube, more preferably the cooling section.

[0113] Example E13: The aerosol-generating article according to any one of the preceding examples, wherein the aerosol-generating article comprises a substrate portion wrap paper, covering a circumferential surface of the substrate portion.

[0114] Example E14: The aerosol-generating article according to any one of the preceding examples, wherein the second hollow tube comprises at least one perforation allowing ambient air to be laterally drawn into the second hollow tube. Example E15: The aerosol-generating article according to any one of examples E4 to E14, wherein the aerosol-generating article consists of the cooling section, the main filter, the substrate portion, the front plug and one or both of the filter plug wrap paper and the substrate portion wrap paper.

[0115] Example E16: An aerosol-generating system, the aerosol-generating system comprising: the aerosol-generating article according to any one of the preceding examples, a holder comprising a cavity for receiving the aerosol-generating article, a flavor capsule, a capsule insertion tool, wherein the capsule insertion tool is configured to insert, via the first hollow tube, the flavor capsule into the second hollow tube of the aerosol-generating article.

[0116] Features described in relation to one embodiment may equally be applied to other embodiments of the invention.

[0117] The invention will be further described, by way of example only, with reference to the accompanying drawings in which:

[0118] Figure 1 is a schematic longitudinal cross-sectional view of an aerosol-generating article.

[0119] Figure 2 is a schematic longitudinal cross-sectional view of an aerosol-generating article showing the insertion process of a flavor capsule.

[0120] Figure 3 is a schematic longitudinal cross-sectional view of another aerosol-generating article.

[0121] Figure 4 is a schematic view of different cross sections of first hollow tubes and corresponding insertion tools.

[0122] Figure 1 illustrates an aerosol-generating article 10 configured for receiving a flavor capsule 28 (not shown), wherein the aerosol-generating article 10 comprises an upstream end and a downstream end. The upstream end is configured to be connectable to a holder for the aerosol-generating article 10. This aerosol-generating article 10 comprises a cooling section, comprising a first hollow tube 12 and a second hollow tube 14, arranged at the downstream end. This section is specifically intended to regulate the flow of the aerosol to reduce the temperature, thereby optimizing its performance, enhancing user comfort, or achieving desired operational conditions. The first hollow tube 12 comprises as a through hole for insertion of the flavor capsule 28, while the second hollow tube 14, located upstream from the first hollow tube 12, is configured to provide space for containing the flavor capsule 28. The inner diameter of the second hollow tube 14 is higher than the inner diameter of the first hollow tube 12, ensuring sufficient space for the flavor capsule 28. Moreover, the inner diameter of the second hollow tube 14 matches or exceeds the outer diameter of the flavor capsule 28, thereby ensuring its retention within the second hollow tube 14 post-insertion.

[0123] Furthermore, the aerosol-generating article 10 comprises a substrate portion 18 housing an aerosol-forming substrate, positioned upstream from the cooling section. Additionally, it comprises a main filter 16, situated downstream from and in direct contact with the substrate portion 18, while being positioned upstream from the cooling section. Additionally, the article 10 includes a front plug 22, located upstream from the substrate portion 18. The substrate portion 18 itself incorporates a susceptor 20 for facilitating aerosol formation. When located within a fluctuating electromagnetic field, eddy currents induced in the susceptor cause heating of the susceptor. The susceptor 20 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 20 to generate an aerosol.

[0124] Moreover, the aerosol-generating article 10 features a filter plug wrap paper 24 extending from the downstream end of the aerosol-generating article 10 to the upstream end over a portion of the aerosol-generating article 10, and covering a circumferential surface of the aerosol-generating article, preferably the first hollow tube 12, more preferably the cooling section. Additionally, the second hollow tube 14 comprises at least one perforation allowing ambient air to be laterally drawn into the second hollow tube. This design enhances the consumer experience by providing a stick configuration that allows insertion of flavor capsules whilst avoiding damage to the filter segment during the flavor capsule insertion process.

[0125] The relevant positions of the main filter 16 and cooling section have been swapped in comparison to known configurations. Thus, a flavor capsule insertion is provided without the user having to modify the product by first creating a hole in a filter segment in which to insert the flavor capsule 28.

[0126] Figure 2 shows the method of capsule insertion into aerosol-generating device 1 as shown in Figure 1 (from top to bottom). As can be seen from the process steps required to be performed by the user, not only is the insertion method simpler, the cooling section and main filter 16 are not modified in any way, thus the performance characteristics of the consumable remains unchanged. In an aerosol-generating system, comprising an aerosol-generating article 10 as described, a holder equipped with a cavity to accommodate the aerosolgenerating article 10, a flavor capsule 28, and a capsule insertion tool 26, the process of inserting the flavor capsule 28 can be described as follows.

[0127] Firstly, the user prepares the system, ensuring proper alignment of the aerosolgenerating article 10 with the holder's cavity to facilitate smooth insertion. The flavor capsule 28 is then loaded into the capsule insertion tool 26, securely held in place for insertion. Guiding the capsule insertion tool 26 through the through hole of first hollow tube 12 of the aerosol-generating article 10, the user carefully navigates it to avoid any obstructions. Upon reaching the desired depth within the first hollow tube 12, the flavor capsule 28 is released, allowing it to pass into the second hollow tube 14.

[0128] After confirmation of the secure positioning of the flavor capsule 28 within the second hollow tube 14, the capsule insertion tool 26 is carefully retracted from the first hollow tube 12, ensuring that the flavor capsule 28 remains at its designated space.

[0129] This process ensures efficient and reliable insertion of the flavor capsule 28 into the aerosol-generating article 10, enabling users to enjoy their preferred flavor profile seamlessly during aerosol generation, without damaging the main filter 16.

[0130] In Figure 3, another embodiment of an aerosol-generating article 10 is shown. Integral to its functionality is a cooling section, comprising a first hollow tube 12 and a second hollow tube 14, positioned at the upstream end. Additionally, a third hollow tube 30 is provided, integrated downstream from the second hollow tube 14. The purpose of the third hollow tube 30 is to further refine the airflow dynamics within the aerosol-generating article 10 and offering a space for a flavor capsule 28. By introducing this component, the system optimizes the mixing of aerosol with any additional flavoring agents or additives present in the second hollow tube 14. This enhancement ensures a more thorough blending of the aerosol with flavor components, resulting in a consistently flavorful vapor for the user.

[0131] Moreover, the third hollow tube 30 serves as a critical element in maintaining a controlled airflow pathway. This controlled airflow pathway promotes uniform distribution of the aerosol throughout the device, ultimately enhancing the user experience by delivering a smoother and more satisfying inhalation experience.

[0132] The cooling section, encompassing the first hollow tube 12 and the second hollow tube 14, plays a pivotal role in optimizing the performance of the aerosol-generating article 10. This section effectively regulates the flow of aerosol to reduce its temperature, thereby enhancing user comfort and achieving desired operational conditions. The first hollow tube 12 functions as a through hole for the insertion of the flavor capsule 28, while the second hollow tube 14 is specifically configured to provide space for containing the flavor capsule 28. Its inner diameter surpasses that of the first hollow tube 12, ensuring sufficient space for the flavor capsule 28 and facilitating its retention within the second hollow tube 14 post-insertion.

[0133] This configuration facilitates easy insertion of flavor capsules 28 while safeguarding against damage to the filter segment during the insertion process. That is to say that when designing suitable aerosol-generating devices products having multiple segments, the inner diameter of the segment configured to receive the flavor capsule should be bounded on either side by segments having a smaller inner diameter. In this way the flavor capsule 28 shall remain in the intended segment after it has been inserted without damaging the device.

[0134] As shown in Figure 4, another aspect is the possibility of matching the shape of the inner cross section of the first hollow tube 12 to the shape of outer cross section of the capsule insertion tool 26. In this way it may be possible to limit the flavor capsule insertion tools compatible with a given stick specification. Examples of such shapes for the hollow acetate tow segment are shown in Figure 4, whereas corresponding shapes for the capsule insertion tool 26 under the respective cross sections of the first hollow tube 12. By matching the shapes of the first hollow tube 12 and insertion tool 26, it may be possible for an aerosolgenerating article 10 manufacturer to limit the flavor capsules 28 that are able to be inserted into the aerosol-generating article 10. Thus, ensuring only flavor capsules 28 of the correct specifications are supplied in compatible insertion tools 26. Else, by varying the inner shape of the first hollow tube 12, it may for example communicate to the consumer a special edition product.

[0135] For the purpose of the present description and of the appended claims, except where otherwise indicated, all numbers expressing amounts, quantities, percentages, and so forth, are to be understood as being modified in all instances by the term "about". Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein. In this context, therefore, a number A is understood as A ± 5 percent (5%) of A. Within this context, a number A may be considered to include numerical values that are within general standard error for the measurement of the property that the number A modifies. The number A, in some instances as used in the appended claims, may deviate by the percentages enumerated above provided that the amount by which A deviates does not materially affect the basic and novel characteristic(s) of the claimed invention. Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein.

Claims

CLAIMS1. An aerosol-generating article configured for receiving a flavor capsule, the aerosol-generating article comprising: a downstream end, an upstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a cooling section, the cooling section comprising a first hollow tube and a second hollow tube, and is located at the downstream end, wherein the first hollow tube is configured to provide a through hole for insertion of the flavor capsule, wherein the second hollow tube is arranged upstream from the first hollow tube and configured to contain the flavor capsule, wherein an inner diameter of the second hollow tube is larger than an inner diameter of the first hollow tube, a third hollow tube, wherein the third hollow tube is arranged upstream from the cooling section, a substrate portion containing an aerosol forming substrate, wherein the cooling section is arranged downstream from the substrate portion.

2. The aerosol-generating article according to claim 1 , wherein the inner diameter of the second hollow tube is similar to or larger than an outer diameter of an insertable flavor capsule, such that the insertable flavor capsule remains in the second hollow tube after insertion of the flavor capsule.

3. The aerosol-generating article according to any one of the preceding claims, further comprising a main filter, wherein the main filter is arranged downstream from and preferably directly abutting with the substrate portion, and wherein the main filter is arranged upstream from the cooling section.

4. The aerosol-generating article according to any one of the preceding claims, further comprising a front plug, wherein the front plug is arranged upstream from the substrate portion.

5. The aerosol-generating article according to any one of the preceding claims, wherein the substrate portion comprises a susceptor.

6. The aerosol-generating article according to any of the preceding claims, wherein an inner diameter of the third hollow tube is smaller than the inner diameter of the second hollow tube.

7. The aerosol-generating article according to any of claims 1 to 6, wherein the inner diameter of the third hollow tube is equal to the inner diameter of the second hollow tube.

8. The aerosol-generating article according to any one of the preceding claims, wherein the first hollow tube is a hollow acetate tube.

9. The aerosol-generating article according to any one of the preceding claims, wherein the second hollow tube is a fine hollow acetate tube.

10. The aerosol-generating article according to any one of the preceding claims, wherein a cross-directional shape of the through hole corresponds to a cross-directional shape of the flavor capsule.11 . The aerosol-generating article according to any one of the preceding claims, wherein the aerosol-generating article comprises a filter plug wrap paper, extending from the downstream end of the aerosol-generating article to the upstream end over at least a portion of the aerosol article, and covering a circumferential surface of the aerosol-generating article, preferably the first hollow tube, more preferably the cooling section.

12. The aerosol-generating article according to any one of the preceding claims, wherein the aerosol-generating article comprises a substrate portion wrap paper, covering a circumferential surface of the substrate portion.

13. The aerosol-generating article according to any one of the preceding claims, wherein the second hollow tube comprises at least one perforation allowing ambient air to be laterally drawn into the second hollow tube.

14. An aerosol-generating system, the aerosol-generating system comprising the aerosol-generating article according to any one of the preceding claims,a holder comprising a cavity for receiving the aerosol-generating article, a flavor capsule, a capsule insertion tool, wherein the capsule insertion tool is configured to insert, via the first hollow tube, the flavor capsule into the second hollow tube of the aerosol-generating article.

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