Patent ID: 12232542

DETAILED DESCRIPTION

The present disclosure will now be described more fully hereinafter with reference to example embodiments thereof. These example embodiments are described so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Indeed, the disclosure is embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. As used in the specification, and in the appended claims, the singular forms “a”, “an”, “the”, include plural referents unless the context clearly dictates otherwise.

The present disclosure provides descriptions of articles (and the assembly and/or manufacture thereof) in which a material is heated (preferably without combusting the material to any significant degree) to form an aerosol and/or an inhalable substance; such articles most preferably being sufficiently compact to be considered “hand-held” devices. In preferred aspects, the articles are characterized as smoking articles. As used herein, the term “smoking article” is intended to mean an article and/or device that provides many of the sensations (e.g., inhalation and exhalation rituals, types of tastes or flavors, organoleptic effects, physical feel, use rituals, visual cues such as those provided by visible aerosol, and the like) of smoking a cigarette, cigar, or pipe, without any substantial degree of combustion of any component of that article and/or device. As used herein, the term “smoking article” does not necessarily mean that, in operation, the article or device produces smoke in the sense of an aerosol resulting from by-products of combustion or pyrolysis of tobacco, but rather, that the article or device yields vapors (including vapors within aerosols that are considered to be visible aerosols that might be considered to be described as smoke-like) resulting from volatilization or vaporization of certain components, elements, and/or the like of the article and/or device. In preferred aspects, articles or devices characterized as smoking articles incorporate tobacco and/or components derived from tobacco.

As noted, aerosol generating components of certain preferred aerosol delivery devices may provide many of the sensations (e.g., inhalation and exhalation rituals, types of tastes or flavors, organoleptic effects, physical feel, use rituals, visual cues such as those provided by visible aerosol, and the like) of smoking a cigarette, cigar or pipe that is employed by lighting and burning tobacco (and hence inhaling tobacco smoke), without any substantial degree of combustion of any component thereof. For example, the user of an aerosol delivery device in accordance with some example implementations of the present disclosure can hold and use that component much like a smoker employs a traditional type of smoking article, draw on one end of that piece for inhalation of aerosol produced by that piece, take or draw puffs at selected intervals of time, and the like.

Articles or devices of the present disclosure are also characterized as being vapor-producing articles, aerosol delivery articles, or medicament delivery articles. Thus, such articles or devices are adaptable so as to provide one or more substances in an inhalable form or state. For example, inhalable substances are substantially in the form of a vapor (e.g., a substance that is in the gas phase at a temperature lower than its critical point). Alternatively, inhalable substances are in the form of an aerosol (e.g., a suspension of fine solid particles or liquid droplets in a gas). For purposes of simplicity, the term “aerosol” as used herein is meant to include vapors, gases, and aerosols of a form or type suitable for human inhalation, whether or not visible, and whether or not of a form that might be considered to be smoke-like. In some implementations, the terms “vapor” and “aerosol” may be interchangeable. Thus, for simplicity, the terms “vapor” and “aerosol” as used to describe the disclosure are understood to be interchangeable unless stated otherwise.

In use, smoking articles of the present disclosure are subjected to many of the physical actions of an individual in using a traditional type of smoking article (e.g., a cigarette, cigar, or pipe that is employed by lighting with a flame and used by inhaling tobacco that is subsequently burned and/or combusted). For example, the user of a smoking article of the present disclosure holds that article much like a traditional type of smoking article, draws on one end of that article for inhalation of an aerosol produced by that article, and takes puffs at selected intervals of time.

While the systems are generally described herein in terms of implementations associated with smoking articles such as so-called “tobacco heating products,” it should be understood that the mechanisms, components, features, and methods may be embodied in many different forms and associated with a variety of articles. For example, the description provided herein may be employed in conjunction with implementations of traditional smoking articles (e.g., cigarettes, cigars, pipes, etc.), heat-not-burn cigarettes, and related packaging for any of the products disclosed herein. Accordingly, it should be understood that the description of the mechanisms, components, features, and methods disclosed herein are discussed in terms of implementations relating to aerosol delivery devices by way of example only, and may be embodied and used in various other products and methods.

Smoking articles of the present disclosure generally include a number of elements provided or contained within an enclosure of some sort, such as a housing, an outer wrap, or wrapping, a casing, a component, a module, a member, or the like. The overall design of the enclosure is variable, and the format or configuration of the enclosure that defines the overall size and shape of the smoking article is also variable. It is desirable, in some aspects, that the overall design, size, and/or shape of the enclosure resembles that of a conventional cigarette or cigar. Typically, an enclosure resembling the shape of a cigarette or cigar comprises separable components, members, or the like that are engaged to form the enclosure. For example, such a smoking article may comprise, in some aspects, separable components that include a holder and a cartridge that includes an aerosol delivery component (such as, for example, a substrate material) and a heat source component. In various aspects, the heat source may be capable of generating heat to aerosolize a substrate material that comprises, for example, an extruded structure and/or substrate, a substrate material associated with an aerosol precursor composition, tobacco and/or a tobacco related material, such as a material that is found naturally in tobacco that is isolated directly from the tobacco or synthetically prepared, in a solid or liquid form (e.g., beads, sheets, shreds, a wrap), or the like. In some implementations, an extruded structure may comprise tobacco products or a composite of tobacco with other materials such as, for example, ceramic powder. In other implementations, a tobacco extract/slurry may be loaded into porous ceramic beads. Other implementations may use non-tobacco products. In some implementations aerosol precursor composition-loaded porous beads/powders (ceramics) may be used. In other implementations, rods/cylinders made of extruded slurry of ceramic powder and aerosol precursor composition may be used.

According to certain aspects of the present disclosure, it may be advantageous to provide an aerosol delivery device that is easy to use and that provides reusable and/or replaceable components.FIGS.1-4illustrate such a device. In particular,FIG.1illustrates a perspective view of an aerosol delivery device100shown in an open position, according to an example implementation of the present disclosure;FIG.2illustrates a perspective view of the aerosol delivery device100shown in a use position, according to an example implementation of the present invention;FIG.3illustrates a perspective view of an aerosol delivery device in which the sleeve is shown as transparent and in a use position, according to an example implementation of the present disclosure; andFIG.4illustrates a longitudinal cross-section view of an aerosol delivery device shown in a use position, according to an example implementation of the present disclosure.

As shown in the figures, the aerosol delivery device100of the depicted implementation includes a holder200and removable and replaceable cartridge300(described in more detail below with respect toFIGS.5and6). In the depicted implementation, the holder200generally comprises a main body202and a sleeve204. As best illustrated inFIG.3, in which the sleeve204is shown transparent for purposes of illustration, the main body202of the depicted implementation defines a first end206and an opposite distal end208. In the depicted implementation, the holder200further includes a receiving portion210located proximate the distal end208of the main body202. In various implementations, the receiving portion is configured to receive at least a portion of a removable and replaceable cartridge. In the depicted implementation, the receiving portion comprises a subcomponent of the main body202; however, in other implementations the receiving portion may be a unitary part of the main body. In the depicted implementation, the holder200has an overall length in an inclusive range of approximately 83 mm to approximately 120 mm, a width in the inclusive range of approximately 15 mm to approximately 25 mm, and a height in the inclusive range of approximately 8 mm to approximately 13 mm.

In the depicted implementation, the holder200(including the main body202and the sleeve204) has a substantially oblong overall shape; however, in other implementations the holder or any of its components may have a different shape. For example, in some implementations the holder (and/or any of its components) may have a substantially cylindrical shape that imitates the shape of a traditional cigarette. In other implementations the holder (and/or any of its components) may have a substantially rectangular shape, such as a substantially rectangular cuboid shape. In other implementations, the holder (and/or any of its components) may have other hand-held shapes. For example, in some implementations the holder (and/or any of its components) may have a small box shape, various pod mod shapes, or a fob-shape.

In the depicted implementation, the main body202further includes an aerosol passage212extending from the receiving portion210through the first end206thereof. The depicted implementation also includes a substantially hollow aerosol tube214configured to be located inside at least a portion of the aerosol passage212of the main body202. In the depicted implementations, a mouthpiece215(depicted separately) is configured to attach to the aerosol tube214. In the depicted implementation, the mouthpiece215snaps onto the aerosol tube214; however, in other implementations the mouthpiece may attach to the aerosol tube in a variety of different ways, including via a screw connection or an interference fit. As best illustrated inFIG.4, the aerosol tube214of the depicted extends from the receiving portion210through the aerosol passage212and beyond the first end206of the main body202. In the depicted implementation, the aerosol tube214and the mouthpiece215comprise separate parts from the main body202. As such, in some implementations the aerosol tube and/or the mouthpiece may be removable and replaceable within the holder. In other implementations, however, the aerosol tube and/or the mouthpiece may be integral with the main body. In still other implementations, the aerosol tube and mouthpiece may comprise a unitary part, which may or may not be integral with the main body. It should be noted that in some implementations, the aerosol tube need not extend all the way to the receiving portion. Further, some implementations need not include a mouthpiece. For example, in some implementations the first end of the main body may serve as a mouthpiece, and, in some implementations, the first end of the main body may have a smaller size than the other portions of the main body.

As noted above, the holder200of the depicted implementation further includes a sleeve204configured to slide to and from an open position and a closed position. The sleeve204of the depicted implementation further defines a first end216and a distal end218. As will be described in more detail below, in the open position the sleeve204of the depicted implementation is configured to allow the cartridge300to be accessible so as to provide an opportunity to insert the cartridge300into the receiving portion210of the main body202and/or remove the cartridge300from the receiving portion210of the main body202.

In various implementations, the main body, the receiving portion, the sleeve, the aerosol tube, and the mouthpiece may be made of moldable plastic materials such as, for example, polycarbonate, polyethylene, acrylonitrile butadiene styrene (ABS), polyamide (Nylon), or polypropylene. In other implementations, however, any one or any combination of these components may be made of a different material, such as, for example, a different plastic material, a metal material (such as, but not limited to, stainless steel, aluminum, brass, copper, silver, gold, or bronze), a graphite material, a glass material, a ceramic material, a natural material (such as, but not limited to, a wood material), a composite material, or any combinations thereof. In some implementations, the main body, the receiving portion, the sleeve, and the mouthpiece may be made of the same material; however, in other implementations, any one or any combination of these components may be made of different materials.

FIG.5illustrates a perspective view of the removable and replaceable cartridge300, according to an example implementation of the present disclosure. In the depicted implementation, the cartridge300defines a first end302and a distal end304. The cartridge300of the depicted implementation further includes a heat portion306comprising a heat source308, a substrate portion310comprising a substrate material316(seeFIG.6), and an outer housing312configured to circumscribe at least a portion of the heat source308and substrate material316. It should be noted that although in the depicted implementation the cartridge300has a substantially cylindrical overall shape, in various other implementations, the cartridge or any of its components may have a different shape. For example, in some implementations the cartridge (and/or any of its components) may have a substantially rectangular shape, such as a substantially rectangular cuboid shape. In other implementations, the cartridge (and/or any of its components) may have other hand-held shapes. Some examples of cartridge configurations that may be applicable to the present disclosure can be found in U.S. patent application Ser. No. 16/515,637, filed on Jul. 18, 2019, and titled Aerosol Delivery Device with Consumable Cartridge, which is incorporated herein by reference in its entirety.

In some implementations a barrier may exist between the heat source and the substrate material. In some implementations, such a barrier may comprise a disc that may include one or more apertures therethrough. In some implementations, the barrier may be constructed of a metal material (such as, for example, stainless steel, aluminum, brass, copper, silver, gold, and bronze), or a graphite material, or a ceramic material, or a plastic material, or any combinations thereof. In some implementations, a heat transfer component, which may or may not comprise a barrier, may exist between the heat source and the substrate material. Some examples of heat transfer components are described in U.S. patent application Ser. No. 15/923,735, filed on Mar. 16, 2018, and titled Smoking Article with Heat Transfer Component, which is incorporated herein by reference in its entirety. In some implementations, a barrier and/or a heat transfer component may prevent or inhibit combustion gasses from being drawn through the substrate material (and/or from being drawn through air passageways through which aerosol is drawn).

In various implementations, the heat source may be configured to generate heat upon ignition thereof. In the depicted implementation, the heat source308comprises a combustible fuel element that has a generally cylindrical shape and that incorporates a combustible carbonaceous material. In other implementations, the heat source may have a different shape, for example, a prism shape having a cubic or hexagonal cross-section. Carbonaceous materials generally have a high carbon content. Preferred carbonaceous materials are composed predominately of carbon, and/or typically have carbon contents of greater than about 60 percent, generally greater than about 70 percent, often greater than about 80 percent, and frequently greater than about 90 percent, on a dry weight basis.

In some instances, the heat source may incorporate elements other than combustible carbonaceous materials (e.g., tobacco components, such as powdered tobaccos or tobacco extracts; flavoring agents; salts, such as sodium chloride, potassium chloride and sodium carbonate; heat stable graphite a hollow cylindrical (e.g., tube) fibers; iron oxide powder; glass filaments; powdered calcium carbonate; alumina granules; ammonia sources, such as ammonia salts; and/or binding agents, such as guar gum, ammonium alginate and sodium alginate). In other implementations, the heat source may comprise a plurality of ignitable objects, such as, for example, a plurality of ignitable beads. It should be noted that in other implementations, the heat source may differ in composition or relative content amounts from those listed above. For example, in some implementations different forms of carbon could be used as a heat source, such as graphite or graphene. In other implementations, the heat source may have increased levels of activated carbon, different porosities of carbon, different amounts of carbon, blends of any above mentioned components, etc. In still other implementations, the heat source may comprise a non-carbon heat source, such as, for example, a combustible liquefied gas configured to generate heat upon ignition thereof. For example, in some implementations, the liquefied gas may comprise one or more of petroleum gas (LPG or LP-gas), propane, propylene, butylenes, butane, isobutene, methyl propane, or n-butane. In still other implementations, the heat source may comprise a chemical reaction based heat source, wherein ignition of the heat source comprises the interaction of two or more individual components. For example, a chemical reaction based heat source may comprise metallic agents and an activating solution, wherein the heat source is activated when the metallic agents and the activating solution come in contact. Some examples of chemical based heat sources can be found in U.S. Pat. No. 7,290,549 to Banerjee et al., which is incorporated herein by reference in its entirety. Combinations of heat sources are also possible. Although specific dimensions of an applicable heat source may vary, in the depicted implementation, the heat source308has a length in an inclusive range of approximately 5 mm to approximately 20 mm, and in some implementations may be approximately 12 mm, and an overall diameter in an inclusive range of approximately 3 mm to approximately 8 mm, and in some implementations may be approximately 4.8 mm (and in some implementations, approximately 7 mm).

Although in other implementations, the heat source may be constructed in a variety of ways, in the depicted implementation, the heat source308is extruded or compounded using a ground or powdered carbonaceous material, and has a density that is greater than about 0.5 g/cm3, often greater than about 0.7 g/cm3, and frequently greater than about 1 g/cm3, on a dry weight basis. See, for example, the types of fuel source components, formulations and designs set forth in U.S. Pat. No. 5,551,451 to Riggs et al. and U.S. Pat. No. 7,836,897 to Borschke et al., which are incorporated herein by reference in their entireties.

Although in various implementations the heat source may have a variety of forms, including, for example, a substantially solid cylindrical shape or a hollow cylindrical (e.g., tube) shape, the heat source308of the depicted implementation comprises an extruded monolithic carbonaceous material that has a generally cylindrical shape that includes a plurality of internal passages314extending longitudinally from a first end of the heat source308to an opposing second end of the heat source308. In the depicted implementation there are approximately thirteen internal passages314comprising a single central internal passage314a, six surrounding internal passages314b, which are spaced from the central internal passages314aand have a similar size (e.g., diameter) to that of the central internal passage314a, and six peripheral internal passages314c, which are spaced from an outer surface of the heat source308and are smaller in diameter than that of the central internal passage314a. It should be noted that in other implementations, there need not be a plurality of internal passages and/or the plurality of internal passages may take other forms and/or sizes. For example, in some implementations, there may be as few as two internal passages, and still other implementations may include as few as a single internal passage. Still other implementations may include no internal passages at all. Additional implementations may include multiple internal passages that may be of unequal diameter and/or shape and which may be unequally spaced and/or located within the heat source.

Some implementations may alternatively, or additionally include one or more peripheral grooves that extend longitudinally from a first end of the heat source to an opposing second end, although in other implementations the grooves need not extend the full length of the heat source. In some implementations, such grooves may be substantially equal in width and depth and may be substantially equally distributed about a circumference of the heat source. In such implementations, there may be as few as two grooves, and still other implementations may include as few as a single groove. Still other implementations may include no grooves at all. Additional implementations may include multiple grooves that may be of unequal width and/or depth, and which may be unequally spaced around a circumference of the heat source. In still other implementations, the heat source may include flutes and/or slits extending longitudinally from a first end of the extruded monolithic carbonaceous material to an opposing second end thereof. In some implementations, the heat source may comprise a foamed carbon monolith formed in a foam process of the type disclosed in U.S. Pat. No. 7,615,184 to Lobovsky, which is incorporated herein by reference in its entirety. As such, some implementations may provide advantages with regard to reduced time taken to ignite the heat source. In some other implementations, the heat source may be co-extruded with a layer of insulation (not shown), thereby reducing manufacturing time and expense. Other implementations of fuel elements include carbon fibers of the type described in U.S. Pat. No. 4,922,901 to Brooks et al. or other heat source implementations such as is disclosed in U.S. Pat. App. Pub. No. 2009/0044818 to Takeuchi et al., each of which is incorporated herein by reference in its entirety. Further examples of heat sources including debossed heat source systems, methods, and smoking articles that include such heat sources are disclosed in U.S. patent application Ser. No. 15/902,665, filed on Feb. 22, 2018, and titledSystem for Debossing a Heat Generation Member, a Smoking Article Including the Debossed Heat Generation Member, and a Related Method, which is incorporated herein by reference in its entirety.

Generally, the heat source is positioned sufficiently near an aerosol delivery component (e.g., the substrate portion) having one or more aerosolizable components so that the aerosol formed/volatilized by the application of heat from the heat source to the aerosolizable components (as well as any flavorants, medicaments, and/or the like that are likewise provided for delivery to a user) is deliverable to the user by way of the mouthpiece. That is, when the heat source heats the substrate component, an aerosol is formed, released, or generated in a physical form suitable for inhalation by a consumer. It should be noted that the foregoing terms are meant to be interchangeable such that reference to release, releasing, releases, or released includes form or generate, forming or generating, forms or generates, and formed or generated. Specifically, an inhalable substance is released in the form of a vapor or aerosol or mixture thereof. Additionally, the selection of various smoking article elements are appreciated upon consideration of commercially available electronic smoking articles, such as those representative products listed in the background art section of the present disclosure.

FIG.6illustrates a longitudinal cross-section view of the cartridge300ofFIG.5. As shown in the figure, the substrate material316of the depicted implementation has opposed first and second ends, with the heat source308disposed adjacent the first end of the substrate material316. Although dimensions of the various components of the cartridge may vary due to the needs of a particular application, in the depicted implementation the cartridge300may have an overall length in an inclusive range of approximately 10 mm to approximately 50 mm and a diameter in an inclusive range of approximately 2 mm to approximately 20 mm. In addition, in the depicted implementation the outer housing312may have a thickness in the inclusive range of approximately 0.05 mm to 0.5 mm. Furthermore, in the depicted implementation the substrate portion310may have a length in the inclusive range of approximately 5 mm to 30 mm and a diameter slightly less than that of the overall cartridge in order to accommodate the thickness of the outer housing312, such as, for example, a diameter in an inclusive range of approximately 2.9 mm to approximately 9.9 mm. In the depicted implementation, the substrate material316comprises tobacco beads, which may have diameter sizes in range of approximately 0.5 mm to 2.0 mm, although in other implementations the size may differ. In other implementations, the substrate material may be a granulated tobacco material or cut filler tobacco. Although other implementations may differ, in the depicted implementation the outer housing312of the cartridge300is filled to about 80-90% capacity to allow for insertion of the heat source308.

In the depicted implementation, the substrate portion310comprises a substrate material316having a single segment, although in other implementations the substrate portion may include one or more additional substrate material segments. For example in some implementations, the aerosol delivery device may further comprise a second substrate material segment (not shown) having opposed first and second ends. In various implementations, one or more of the substrate materials may include a tobacco or tobacco related material, with an aerosol precursor composition associated therewith. In other implementations, non-tobacco materials may be used, such as a cellulose pulp material. In other implementations, the non-tobacco substrate material may not be a plant-derived material. Other possible compositions, components, and/or additives for use in a substrate material (and/or substrate materials) are described in more detail below. It should be noted that the subsequent discussion should be applicable any substrate material usable in the smoking articles described herein (such as, for example, the substrate material316of the depicted implementation).

Referring also toFIGS.1-4, ignition of the heat source308of the depicted implementation results in aerosolization of the aerosol precursor composition associated with the substrate material316. In various implementations, the aerosol passage212and mouthpiece215of the holder200are configured to receive the generated aerosol therethrough in response to a draw applied to the mouthpiece215by a user. In some implementations the mouthpiece215may comprise a filter configured to receive the aerosol therethrough in response to the draw applied to the mouthpiece215. In various implementations, the filter may be provided, in some aspects, as a circular disc radially and/or longitudinally disposed proximate the end of the holder opposite the receiving end. In this manner, upon a draw on the mouthpiece215, the filter may receive the aerosol flowing through holder200of the aerosol delivery device100. In some implementations, the filter may comprise discrete segments. For example, some implementations may include a segment providing filtering, a segment providing draw resistance, a hollow segment providing a space for the aerosol to cool, other filter segments, and any one or any combination of the above. In some implementations, the mouthpiece may include a filter that may also provide a flavorant additive. In some implementations, a filter may include one or more filter segments that may be replaceable. For example, in some implementations one or more filter segments may be replaceable in order to customize a user's experience with the device, including, for example, filter segments that provide different draw resistances and/or different flavors. Some examples of flavor adding materials and/or components configured to add a flavorant can be found in U.S. patent application Ser. No. 16/408,942, filed on May 10, 2019 and titled Flavor Article for an Aerosol Delivery Device; U.S. patent application Ser. No. 15/935,105, filed on Mar. 26, 2018, and titled Aerosol Delivery Device Providing Flavor Control; and U.S. patent application Ser. No. 16/353,556, filed on Mar. 14, 2019, and titled Aerosol Delivery Device Providing Flavor Control, each of which is incorporated by reference herein in its entirety.

Preferably, the elements of the substrate material do not experience thermal decomposition (e.g., charring, scorching, or burning) to any significant degree, and the aerosolized components are entrained in the air drawn through the smoking article, including a filter (if present), and into the mouth of the user. In the smoking article100of the depicted implementation, the substrate material316comprises a plurality of tobacco beads together formed into a substantially cylindrical portion. In various implementations, however, the substrate material may comprise a variety of different compositions and combinations thereof, as explained in more detail below.

In one implementation, for example, the substrate material may comprise a blend of flavorful and aromatic tobaccos in cut filler form. In another implementation, the substrate material may comprise a reconstituted tobacco material, such as described in U.S. Pat. No. 4,807,809 to Pryor et al.; U.S. Pat. No. 4,889,143 to Pryor et al. and U.S. Pat. No. 5,025,814 to Raker, the disclosures of which are incorporated herein by reference in their entirety. Additionally, a reconstituted tobacco material may include a reconstituted tobacco paper for the type of cigarettes described in Chemical and Biological Studies on New Cigarette Prototypes that Heat Instead of Burn Tobacco, R. J. Reynolds Tobacco Company Monograph (1988), the contents of which are incorporated herein by reference in its entirety. For example, a reconstituted tobacco material may include a sheet-like material containing tobacco and/or tobacco-related materials. As such, in some implementations, the substrate material may be formed from a wound roll of a reconstituted tobacco material. In another implementation, the substrate material may be formed from shreds, strips, and/or the like of a reconstituted tobacco material. In another implementation, the tobacco sheet may comprise overlapping layers (e.g., a gathered web), which may, or may not, include heat conducting constituents. Examples of substrate portions that include a series of overlapping layers (e.g., gathered webs) of an initial substrate sheet formed by the fibrous filler material, aerosol forming material, and plurality of heat conducting constituents are described in U.S. patent application Ser. No. 15/905,320, filed on Feb. 26, 2018, and titled Heat Conducting Substrate For Electrically Heated Aerosol Delivery Device, which is incorporated herein by reference in its entirety.

In some implementations, the substrate material may include a plurality of microcapsules, beads, granules, and/or the like having a tobacco-related material. For example, a representative microcapsule may be generally spherical in shape, and may have an outer cover or shell that contains a liquid center region of a tobacco-derived extract and/or the like. In some implementations, one or more of the substrate materials may include a plurality of microcapsules each formed into a hollow cylindrical shape. In some implementations, one or more of the substrate materials may include a binder material configured to maintain the structural shape and/or integrity of the plurality of microcapsules formed into the hollow cylindrical shape.

Tobacco employed in one or more of the substrate materials may include, or may be derived from, tobaccos such as flue-cured tobacco, burley tobacco, Oriental tobacco, Maryland tobacco, dark tobacco, dark-fired tobacco and Rustica tobacco, as well as other rare or specialty tobaccos, or blends thereof. Various representative tobacco types, processed types of tobaccos, and types of tobacco blends are set forth in U.S. Pat. No. 4,836,224 to Lawson et al.; U.S. Pat. No. 4,924,888 to Perfetti et al.; U.S. Pat. No. 5,056,537 to Brown et al.; U.S. Pat. No. 5,159,942 to Brinkley et al.; U.S. Pat. No. 5,220,930 to Gentry; U.S. Pat. No. 5,360,023 to Blakley et al.; U.S. Pat. No. 6,701,936 to Shafer et al.; U.S. Pat. No. 6,730,832 to Dominguez et al.; U.S. Pat. No. 7,011,096 to Li et al.; U.S. Pat. No. 7,017,585 to Li et al.; U.S. Pat. No. 7,025,066 to Lawson et al.; U.S. Pat. App. Pub. No. 2004/0255965 to Perfetti et al.; PCT Pub. No. WO 02/37990 to Bereman; and Bombick et al.,Fund. Appl. Toxicol.,39, p. 11-17 (1997); the disclosures of which are incorporated herein by reference in their entireties.

In still other implementations of the present disclosure, the substrate material may include an extruded structure that includes, or is essentially comprised of a tobacco, a tobacco related material, glycerin, water, and/or a binder material, although certain formulations may exclude the binder material. In various implementations, suitable binder materials may include alginates, such as ammonium alginate, propylene glycol alginate, potassium alginate, and sodium alginate. Alginates, and particularly high viscosity alginates, may be employed in conjunction with controlled levels of free calcium ions. Other suitable binder materials include hydroxypropylcellulose such as Klucel H from Aqualon Co.; hydroxypropylmethylcellulose such as Methocel K4MS from The Dow Chemical Co.; hydroxyethylcellulose such as Natrosol 250 MRCS from Aqualon Co.; microcrystalline cellulose such as Avicel from FMC; methylcellulose such as Methocel A4M from The Dow Chemical Co.; and sodium carboxymethyl cellulose such as CMC 7HF and CMC 7H4F from Hercules Inc. Still other possible binder materials include starches (e.g., corn starch), guar gum, carrageenan, locust bean gum, pectins and xanthan gum. In some implementations, combinations or blends of two or more binder materials may be employed. Other examples of binder materials are described, for example, in U.S. Pat. No. 5,101,839 to Jakob et al.; and U.S. Pat. No. 4,924,887 to Raker et al., each of which is incorporated herein by reference in its entirety. In some implementations, the aerosol forming material may be provided as a portion of the binder material (e.g., propylene glycol alginate). In addition, in some implementations, the binder material may comprise nanocellulose derived from a tobacco or other biomass.

In some implementations, the substrate material may include an extruded material, as described in U.S. Pat. App. Pub. No. 2012/0042885 to Stone et al., which is incorporated herein by reference in its entirety. In yet another implementation, the substrate material may include an extruded structure and/or substrate formed from marumarized and/or non-marumarized tobacco. Marumarized tobacco is known, for example, from U.S. Pat. No. 5,105,831 to Banerjee, et al., which is incorporated by reference herein in its entirety. Marumarized tobacco includes about 20 to about 50 percent (by weight) tobacco blend in powder form, with glycerol (at about 20 to about 30 percent weight), calcium carbonate (generally at about 10 to about 60 percent by weight, often at about 40 to about 60 percent by weight), along with binder agents, as described herein, and/or flavoring agents. In various implementations, the extruded material may have one or more longitudinal openings.

In various implementations, the substrate material may take on a variety of conformations based upon the various amounts of materials utilized therein. For example, a sample substrate material may comprise up to approximately 98% by weight, up to approximately 95% by weight, or up to approximately 90% by weight of a tobacco and/or tobacco related material. A sample substrate material may also comprise up to approximately 25% by weight, approximately 20% by weight, or approximately 15% by weight water—particularly approximately 2% to approximately 25%, approximately 5% to approximately 20%, or approximately 7% to approximately 15% by weight water. Flavors and the like (which include, for example, medicaments, such as nicotine) may comprise up to approximately 10%, up to about 8%, or up to about 5% by weight of the aerosol delivery component.

Additionally or alternatively, the substrate material may include an extruded structure and/or a substrate that includes or essentially is comprised of tobacco, glycerin, water, and/or binder material, and is further configured to substantially maintain its structure throughout the aerosol-generating process. That is, the substrate material may be configured to substantially maintain its shape (e.g., the substrate material does not continually deform under an applied shear stress) throughout the aerosol-generating process. Although such an example substrate material may include liquids and/or some moisture content, the substrate may remain substantially solid throughout the aerosol-generating process and may substantially maintain structural integrity throughout the aerosol-generating process. Example tobacco and/or tobacco related materials suitable for a substantially solid substrate material are described in U.S. Pat. App. Pub. No. 2015/0157052 to Ademe et al.; U.S. Pat. App. Pub. No. 2015/0335070 to Sears et al.; U.S. Pat. No. 6,204,287 to White; and U.S. Pat. No. 5,060,676 to Hearn et al., which are incorporated herein by reference in their entirety.

In some implementations, the amount of substrate material used within the smoking article may be such that the article exhibits acceptable sensory and organoleptic properties, and desirable performance characteristics. For example, in some implementations an aerosol precursor composition such as, for example, glycerin and/or propylene glycol, may be employed within the substrate material in order to provide for the generation of a visible mainstream aerosol that in many regards resembles the appearance of tobacco smoke. For example, the amount of aerosol precursor composition incorporated into the substrate material of the smoking article may be in the range of about 3.5 grams or less, about 3 grams or less, about 2.5 grams or less, about 2 grams or less, about 1.5 grams or less, about 1 gram or less, or about 0.5 gram or less.

According to another implementation, a smoking article according to the present disclosure may include a substrate material comprising a porous, inert material such as, for example, a ceramic material. For example, in some implementations ceramics of various shapes and geometries (e.g., beads, rods, tubes, etc.) may be used, which have various pore morphology. In addition, in some implementations non-tobacco materials, such as an aerosol precursor composition, may be loaded into the ceramics. In another implementation, the substrate material may include a porous, inert material that does not substantially react, chemically and/or physically, with a tobacco-related material such as, for example, a tobacco-derived extract. In addition, an extruded tobacco, such as those described above, may be porous. For example, in some implementations an extruded tobacco material may have an inert gas, such as, for example, nitrogen, that acts as a blowing agent during the extrusion process.

As noted above, in various implementations one or more of the substrate materials may include a tobacco, a tobacco component, and/or a tobacco-derived material that has been treated, manufactured, produced, and/or processed to incorporate an aerosol precursor composition (e.g., humectants such as, for example, propylene glycol, glycerin, and/or the like) and/or at least one flavoring agent, as well as a flame/burn retardant (e.g., diammonium phosphate and/or another salt) configured to help prevent ignition, pyrolysis, combustion, and/or scorching of the substrate material by the heat source. Various manners and methods for incorporating tobacco into smoking articles, and particularly smoking articles that are designed so as to not purposefully burn virtually all of the tobacco within those smoking articles are set forth in U.S. Pat. No. 4,947,874 to Brooks et al.; U.S. Pat. No. 7,647,932 to Cantrell et al.; U.S. Pat. No. 8,079,371 to Robinson et al.; U.S. Pat. No. 7,290,549 to Banerjee et al.; and U.S. Pat. App. Pub. No. 2007/0215167 to Crooks et al.; the disclosures of which are incorporated herein by reference in their entireties.

As noted, in some implementations, flame/burn retardant materials and other additives that may be included within one or more of the substrate materials and may include organo-phosophorus compounds, borax, hydrated alumina, graphite, potassium tripolyphosphate, dipentaerythritol, pentaerythritol, and polyols. Others such as nitrogenous phosphonic acid salts, mono-ammonium phosphate, ammonium polyphosphate, ammonium bromide, ammonium borate, ethanolammonium borate, ammonium sulphamate, halogenated organic compounds, thiourea, and antimony oxides are suitable but are not preferred agents. In each aspect of flame-retardant, burn-retardant, and/or scorch-retardant materials used in the substrate material and/or other components (whether alone or in combination with each other and/or other materials), the desirable properties most preferably are provided without undesirable off-gassing or melting-type behavior.

According to other implementations of the present disclosure, the substrate material may also incorporate tobacco additives of the type that are traditionally used for the manufacture of tobacco products. Those additives may include the types of materials used to enhance the flavor and aroma of tobaccos used for the production of cigars, cigarettes, pipes, and the like. For example, those additives may include various cigarette casing and/or top dressing components. See, for example, U.S. Pat. No. 3,419,015 to Wochnowski; U.S. Pat. No. 4,054,145 to Berndt et al.; U.S. Pat. No. 4,887,619 to Burcham, Jr. et al.; U.S. Pat. No. 5,022,416 to Watson; U.S. Pat. No. 5,103,842 to Strang et al.; and U.S. Pat. No. 5,711,320 to Martin; the disclosures of which are incorporated herein by reference in their entireties. Preferred casing materials may include water, sugars and syrups (e.g., sucrose, glucose and high fructose corn syrup), humectants (e.g. glycerin or propylene glycol), and flavoring agents (e.g., cocoa and licorice). Those added components may also include top dressing materials (e.g., flavoring materials, such as menthol). See, for example, U.S. Pat. No. 4,449,541 to Mays et al., the disclosure of which is incorporated herein by reference in its entirety. Further materials that may be added include those disclosed in U.S. Pat. No. 4,830,028 to Lawson et al. and U.S. Pat. No. 8,186,360 to Marshall et al., the disclosures of which are incorporated herein by reference in their entireties.

In some implementations, the substrate material may comprise a liquid including an aerosol precursor composition and/or a gel including an aerosol precursor composition. Some examples of liquid compositions can be found in U.S. patent application Ser. No. 16/171,920, filed on Oct. 26, 2018, and titledAerosol Delivery Device With Visible Indicator, which is incorporated herein by reference in its entirety.

As noted above, in various implementations, one or more of the substrate materials may have an aerosol precursor composition associated therewith. For example, in some implementations the aerosol precursor composition may comprise one or more different components, such as polyhydric alcohol (e.g., glycerin, propylene glycol, or a mixture thereof). Representative types of further aerosol precursor compositions are set forth in U.S. Pat. No. 4,793,365 to Sensabaugh, Jr. et al.; U.S. Pat. No. 5,101,839 to Jakob et al.; PCT WO 98/57556 to Biggs et al.; and Chemical and Biological Studies on New Cigarette Prototypes that Heat Instead of Burn Tobacco, R. J. Reynolds Tobacco Company Monograph (1988); the disclosures of which are incorporated herein by reference. In some aspects, a substrate material may produce a visible aerosol upon the application of sufficient heat thereto (and cooling with air, if necessary), and the substrate material may produce an aerosol that is “smoke-like.” In other aspects, the substrate material may produce an aerosol that is substantially non-visible but is recognized as present by other characteristics, such as flavor or texture. Thus, the nature of the produced aerosol may be variable depending upon the specific components of the aerosol delivery component. The substrate material may be chemically simple relative to the chemical nature of the smoke produced by burning tobacco.

In some implementations, the aerosol precursor composition may incorporate nicotine, which may be present in various concentrations. The source of nicotine may vary, and the nicotine incorporated in the aerosol precursor composition may derive from a single source or a combination of two or more sources. For example, in some implementations the aerosol precursor composition may include nicotine derived from tobacco. In other implementations, the aerosol precursor composition may include nicotine derived from other organic plant sources, such as, for example, non-tobacco plant sources including plants in the Solanaceae family. In other implementations, the aerosol precursor composition may include synthetic nicotine. In some implementations, nicotine incorporated in the aerosol precursor composition may be derived from non-tobacco plant sources, such as other members of the Solanaceae family. The aerosol precursor composition may additionally or alternatively include other active ingredients including, but not limited to, botanical ingredients (e.g., lavender, peppermint, chamomile, basil, rosemary, thyme, eucalyptus, ginger, cannabis, ginseng, maca, and tisanes), stimulants (e.g., caffeine and guarana), amino acids (e.g., taurine, theanine, phenylalanine, tyrosine, and tryptophan) and/or pharmaceutical, nutraceutical, and medicinal ingredients (e.g., vitamins, such as B6, B12, and C and cannabinoids, such as tetrahydrocannabinol (THC) and cannabidiol (CBD)).

A wide variety of types of flavoring agents, or materials that alter the sensory or organoleptic character or nature of the mainstream aerosol of the smoking article may be suitable to be employed. In some implementations, such flavoring agents may be provided from sources other than tobacco and may be natural or artificial in nature. For example, some flavoring agents may be applied to, or incorporated within, the substrate material and/or those regions of the smoking article where an aerosol is generated. In some implementations, such agents may be supplied directly to a heating cavity or region proximate to the heat source or are provided with the substrate material. Example flavoring agents may include, for example, vanillin, ethyl vanillin, cream, tea, coffee, fruit (e.g., apple, cherry, strawberry, peach and citrus flavors, including lime and lemon), maple, menthol, mint, peppermint, spearmint, wintergreen, nutmeg, clove, lavender, cardamom, ginger, honey, anise, sage, cinnamon, sandalwood, jasmine, cascarilla, cocoa, licorice, and flavorings and flavor packages of the type and character traditionally used for the flavoring of cigarette, cigar, and pipe tobaccos. Syrups, such as high fructose corn syrup, may also be suitable to be employed.

Flavoring agents may also include acidic or basic characteristics (e.g., organic acids, such as levulinic acid, succinic acid, pyruvic acid, and benzoic acid). In some implementations, flavoring agents may be combinable with the elements of the substrate material if desired.

Example plant-derived compositions that may be suitable are disclosed in U.S. Pat. No. 9,107,453 and U.S. Pat. App. Pub. No. 2012/0152265 both to Dube et al., the disclosures of which are incorporated herein by reference in their entireties. Any of the materials, such as flavorings, casings, and the like that may be useful in combination with a tobacco material to affect sensory properties thereof, including organoleptic properties, such as described herein, may be combined with the substrate material. Organic acids particularly may be able to be incorporated into the substrate material to affect the flavor, sensation, or organoleptic properties of medicaments, such as nicotine, that may be able to be combined with the substrate material. For example, organic acids, such as levulinic acid, lactic acid, pyruvic acid, and benzoic acid may be included in the substrate material with nicotine in amounts up to being equimolar (based on total organic acid content) with the nicotine. Any combination of organic acids may be suitable. For example, in some implementations, the substrate material may include approximately 0.1 to about 0.5 moles of levulinic acid per one mole of nicotine, approximately 0.1 to about 0.5 moles of pyruvic acid per one mole of nicotine, approximately 0.1 to about 0.5 moles of lactic acid per one mole of nicotine, or combinations thereof, up to a concentration wherein the total amount of organic acid present is equimolar to the total amount of nicotine present in the substrate material. Various additional examples of organic acids employed to produce a substrate material are described in U.S. Pat. App. Pub. No. 2015/0344456 to Dull et al., which is incorporated herein by reference in its entirety. The selection of such further components may be variable based upon factors such as the sensory characteristics that are desired for the smoking article, and the present disclosure is intended to encompass any such further components that are readily apparent to those skilled in the art of tobacco and tobacco-related or tobacco-derived products. See, Gutcho, Tobacco Flavoring Substances and Methods, Noyes Data Corp. (1972) and Leffingwell et al., Tobacco Flavoring for Smoking Products (1972), the disclosures of which are incorporated herein by reference in their entireties.

In other implementations, the substrate material may include other materials having a variety of inherent characteristics or properties. For example, the substrate material may include a plasticized material or regenerated cellulose in the form of rayon. As another example, viscose (commercially available as VISIL®), which is a regenerated cellulose product incorporating silica, may be suitable. Some carbon fibers may include at least 95 percent carbon or more. Similarly, natural cellulose fibers such as cotton may be suitable, and may be infused or otherwise treated with silica, carbon, or metallic particles to enhance flame-retardant properties and minimize off-gassing, particularly of any undesirable off-gassing components that would have a negative impact on flavor (and especially minimizing the likelihood of any toxic off-gassing products). Cotton may be treatable with, for example, boric acid or various organophosphate compounds to provide desirable flame-retardant properties by dipping, spraying or other techniques known in the art. These fibers may also be treatable (coated, infused, or both by, e.g., dipping, spraying, or vapor-deposition) with organic or metallic nanoparticles to confer the desired property of flame-retardancy without undesirable off-gassing or melting-type behavior.

In the depicted implementation, the substrate material316may comprise a centrally defined longitudinally extending axis between the opposed first and second ends, and a cross-section of the substrate material316may be, in some implementations, symmetrical about the axis. For example, in some implementations a cross-section of the substrate material may be substantially circular such that the substrate material defines a substantially cylindrical shape extending between the opposed first and second ends thereof. However, in other implementations, the substrate material may define a substantially non-circular cross-section such that the substrate material may define a substantially non-cylindrical shape between the opposed first and second ends thereof. Otherwise, in other examples, the substrate material may comprise an asymmetric cross-section about the axis. In various implementations, each end of the substrate material may be in axial alignment with adjacent elements.

As shown inFIGS.5and6, the outer housing312of the cartridge300of the depicted implementation is configured to circumscribe at least a portion of the substrate portion310, including the substrate material316. In the depicted implementation, the outer housing312is also configured to circumscribe at least a portion of the heat source308. In some implementations, the outer housing may circumscribe the entire heat source. In the depicted implementation, the outer housing comprises a rigid material. For example, the outer housing312of the depicted implementation is constructed of an aluminum material; however, in other implementations the outer housing may be constructed of other materials, including other metal materials (such as, for example, stainless steel, aluminum, brass, copper, silver, gold, and bronze), or graphite materials, or ceramic materials, or plastic materials, or any combinations thereof. In some implementations, at least a portion of the heat source and/or at least a portion of the substrate material may be circumscribed by a paper foil laminate. In some implementations, the cartridge may comprise an enclosure comprising a laminate that contains a heat source and a beaded substrate material. Some examples of laminates and/or enclosures that may be applicable to the present disclosure can be found in U.S. patent application Ser. No. 16/174,846, filed on Oct. 30, 2018, and titled Smoking Article Cartridge, which is incorporated herein by reference in its entirety.

In the depicted implementation, the outer housing312is constructed as tube structure that substantially encapsulates the substrate material316; however, as noted above, in other implementations the outer housing may have other shapes. Although the shape of the outer housing may vary, in the depicted implementation the outer housing312comprises a tube structure having an open end and a closed end. The depicted implementation of the outer housing312also includes one or more end apertures318located on the closed end of the outer housing312that are configured to allow aerosolized vapor (herein alternatively referred to as a “vapor” or “aerosol”) to pass therethrough. The end apertures318of the depicted implementation are in the form of a pair of elongate rounded slots; however, in other implementations the end apertures may have any form that permits passage of the aerosol therethrough. As such, it will be appreciated that the end apertures318can comprise fewer or additional apertures and/or alternative shapes and sizes of apertures than those illustrated. In various implementations, the holder of the present disclosure is configured to receive and retain (at least temporarily, such as until a user desires to remove it) a cartridge of the present disclosure. In various implementations, the holder may retain a cartridge in a variety of different ways, such as, for example by including one or more retention features. For example, in some implementations one or both of the outer housing of the cartridge and an inner surface of the receiving portion may include one or more protrusions and/or spring features and corresponding detent features configured to retain the cartridge in the receiving portion. In another implementation, the inner surface of the receiving portion may have a decreasing diameter, and/or one or more portions having a decreased diameter, that may be configured to retain the cartridge in the receiving portion. In another implementation, the receiving portion (or another portion of the holder) may include retractable features configured to engage the cartridge to retain it in the receiving portion. In still other implementations, one or more features of the cartridge and/or one or more features of the receiving portion may create a releasable connection between the receiving portion and the cartridge. For example, in some implementations the cartridge and the receiving portion may have a releasable screw-type connection. In other implementations, the cartridge and the receiving portion may have a releasable bayonet-type connection. In still other implementations, the cartridge may be retained in the receiving portion via magnetic force. For example, in some implementations the outer housing of the cartridge may be made of a ferromagnetic material, and the receiving portion may include one or more magnets.

As noted above, in various implementations of the present disclosure the sleeve is configured to move to and from an open position and a use position. For example,FIG.1shows the sleeve204of the depicted implementation in an open position, andFIGS.2-4show the sleeve204in the use position. In various implementations, the open position of the sleeve is configured to allow a user to insert and remove a cartridge. In depicted implementation, for example, the open position of the sleeve is such that the distal end218of the sleeve204is positioned proximate to the distal end208of the main body202. In such a manner, a portion of the outer housing312of the cartridge300is accessible for the user to grasp. It should be noted, however, that in various implementations the position of the distal end of the sleeve relative to the distal end of the main body in the open position may vary. For example, in the open position of the depicted implementation the distal end218of the sleeve204is configured to be positioned beyond (e.g., may extend away from) the distal end208of the main body202. However, in the open position of other implementations the distal end of the sleeve may substantially align with the distal end of the main body. Moreover, in the open position of still other implementations, the distal end of the sleeve may slide past the distal end of the main body, such that the distal end of the sleeve is closer to the first end of the main body.

In the use position, the distal end of the sleeve is positioned away from the receiving portion and toward the distal end of the cartridge. For example, inFIGS.2-4of the depicted implementation, the distal end218of the sleeve204is configured to substantially align with the distal end304of the cartridge300. It should be noted, however, that in other implementations the distal end of the sleeve may be positioned past the distal end of the cartridge (e.g., farther away from the receiving portion), while in other implementations the distal end of the sleeve may be positioned closer to the receiving portion (but not as close to the receiving portion as the position of the distal end of the sleeve in the open position).

In some implementations, the aerosol delivery device of the present disclosure may include an air permeable cover feature (e.g., a cover feature comprising a plurality of openings or a cover feature comprising a mesh) that protects the heat source in the use position. For example, in one implementation the device may include an air permeable cover feature located proximate the distal end of the sleeve that may be mechanically or manually actuatable (e.g., by rotating the cover feature over the end of the sleeve and/or by sliding the cover feature across the end of the sleeve) such that once ignited, the cover feature may be actuated to substantially cover the open end of the sleeve while maintaining sufficient access of oxygen to the heat source.

It should be noted that in other implementations, the aerosol delivery device of the present disclosure may include a third position, which may be an extinguishment position. In such a manner, the extinguishment position may be configured such that the heat source is deprived of sufficient oxygen to sustain combustion. In some implementations, the extinguishment position may be obtained by further sliding the sleeve. In other implementations, for example, one or more additional features may be included such that an extinguishment position may be achieved by actuating the one or more additional features. In particular, in one implementation the device may include an air impermeable cover feature located proximate the distal end of the sleeve that may be mechanically or manually actuatable (e.g., by rotating the cover feature over the end of the sleeve and/or by sliding the cover feature across the end of the sleeve) such that in the extinguishment position, the cover feature substantially covers the open end of the sleeve and the heat source is deprived of sufficient oxygen to sustain combustion. In another implementation, the device may include a detachable feature, such as, for example an end cap, that may be used to achieve the extinguishment position. For example, in some implementations a separate end cap may be attachable over the distal end of the sleeve such that, once attached, the heat source is deprived of sufficient oxygen to sustain combustion. Such an end cap could also be used to cover the sleeve when not in use, such as, for example, to prevent dirt and/or foreign objects from entering into the device.

In the depicted implementation, the sleeve204comprises a sleeve wall220that is substantially solid and non-porous; however, in other implementations the sleeve wall may have other configurations. For example, in some implementations the sleeve wall (or one or more portions thereof) may be non-solid and/or substantially porous or may include one or more non-solid and/or substantially porous portions. In some implementations, the sleeve may include one or more apertures that may facilitate access of oxygen to the heat source. Alternatively or additionally, other implementations may include one or more apertures that may mix with the aerosol generated during a draw. For example, in some implementations the sleeve may include one or more apertures proximate the distal end thereof. In such a manner, in the use position the one or more apertures of the sleeve may be located proximate the heat source, thus providing the heat source with additional access to oxygen during combustion. In other implementations, the sleeve and/or the main body and/or the mouthpiece may include one or more apertures that may mix with aerosol generated by the substrate material. For example, in some implementations both the sleeve and the main body may include apertures that, in the use position, substantially align and extend into the aerosol passage of the main body and/or the aerosol tube such that air from outside the holder may mix with aerosol generated by the substrate material. In other implementations, the main body itself and/or the mouthpiece may include one or more apertures that extend into the aerosol passage of the main body and/or the aerosol tube such that air from outside the holder may mix with aerosol generated by the substrate material.

In various implementations (and as shown, for example inFIGS.1-4of the depicted implementation) the inner surface of the sleeve wall220is positioned some distance away from the heat source308such that a gap is maintained between the periphery of the heat source308and the inner surface of the sleeve wall220. In such a manner, the gap may provide the heat source308with sufficient exposure to oxygen so that it remains ignited even after the sleeve has been moved from the open position to the use position. For example, in some implementations of the use position the gap distance is in the inclusive range of approximately 2 mm to approximately 10 mm. In other implementations, such as, for example, implementations in which the holder has a substantially cylindrical or cigarette-like in shape, gap distances may be in the inclusive range of approximately 2 mm to approximately 5 mm. In other implementations, the gap may be in the inclusive range of approximately 10.0 mm to approximately 20 mm.

In some implementations, the holder (e.g., one or both of the sleeve and the main body) may include detent features configured to locate the sleeve in at least one of the open position and the use position. In some implementations, the holder may include one or more magnets configured to bias and/or locate the sleeve in at least one of the open position or the use position. In some implementations, the holder may include one or more spring features configured to bias and/or locate the sleeve in at least one of the open position or the use position. In some further implementations, the holder may emit an audible click when the sleeve is positioned in at least one of the open position and the use position.

In various implementations, the present disclosure may be directed to kits that provide a variety of components as described herein. For example, a kit may comprise a holder with one or more cartridges. In another implementation, a kit may comprise a plurality of holders. In further implementations, a kit may comprise a plurality of cartridges. In yet another implementation, a kit may comprise a plurality of holders and a plurality of cartridges. The inventive kits may further include a case (or other packaging, carrying, or storage component) that accommodates one or more of the further kit components. The case could be a reusable hard or soft container. Further, the case could be simply a box or other packaging structure. In some implementations, a brush or other cleanout accessory may be included in a kit. The cleanout accessory may be configured to be inserted in a receiving chamber of the holder, or, in other implementations, inserted in a separate aperture that enables a user to remove debris from the receiving chamber.

Many modifications and other embodiments of the disclosure will come to mind to one skilled in the art to which this disclosure pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the disclosure is not to be limited to the specific embodiments disclosed herein and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.