Capsule with internal channel, heat-not-burn (HNB) aerosol generator and method for generating aerosol

Abstract

A capsule for an aerosol generating device can include a housing defining an entrance opening, an exit opening, and an internal channel between the entrance opening and the exit opening. The internal channel is configured to hold an aerosol-forming substrate. The housing is configured to facilitate heating of the aerosol-forming substrate via conduction and / or convection to generate an aerosol.

Description

[Technical field]

[0001] The present disclosure relates to capsules, heat-not-burn (HNB) aerosol generators, and methods for generating aerosols without substantial thermal decomposition of the aerosol-forming substrate. [Background technology]

[0002] Some electronic devices are configured to heat the plant material to a temperature sufficient to release the plant material's components while maintaining a temperature below the plant material's combustion point to avoid substantial thermal decomposition of the plant material. Such devices may be referred to as aerosol generating devices (e.g., heat-not-burn aerosol generating devices), and the plant material to be heated may be tobacco. In some embodiments, the plant material may be introduced directly into the heating chamber of the aerosol generating device. In other embodiments, the plant material may be prepackaged in individual containers for ease of insertion and removal from the aerosol generating device.

[0003] [Summary] At least one embodiment relates to a capsule for a heat-not-burn (HNB) aerosol generating device. In an exemplary embodiment, the capsule can include a housing defining an inlet opening, an outlet opening, and an internal channel between the inlet opening and the outlet opening. The internal channel is configured to hold an aerosol-forming substrate. The housing is configured to facilitate heating of the aerosol-forming substrate via conduction and / or convection to generate an aerosol.

[0004] At least one embodiment relates to a heat-not-burn (HNB) aerosol generating device. In an exemplary embodiment, the aerosol generating device can include a device body and a heating assembly. The device body defines at least one slot configured to receive a capsule including an aerosol-forming substrate. The heating assembly is configured to heat the capsule including the aerosol-forming substrate to generate an aerosol. The heating assembly can include a first heater and a second heater configured to sandwich the capsule therebetween to heat the aerosol-forming substrate via conduction. The heating assembly can further include an upstream heater configured to heat the aerosol-forming substrate via convection.

[0005] At least one embodiment relates to a method of generating an aerosol. In an exemplary embodiment, the method may include engaging a capsule between a first heater and a second heater. The capsule may define an internal channel that holds an aerosol-forming substrate. The method may further include heating the aerosol-forming substrate via continuity of the first heater and the second heater. Additionally, the method may include heating the aerosol-forming substrate via convection. [Brief description of the drawings]

[0006] Various features and advantages of the non-limiting embodiments herein will become more apparent upon consideration of the detailed description in conjunction with the accompanying drawings. The accompanying drawings are provided merely for illustration purposes and should not be construed as limiting the scope of the claims. The accompanying drawings should not be considered as drawn to scale unless explicitly noted. For clarity, various dimensions of the drawings may be exaggerated.

[0007] [Figure 1] FIG. 1 is a perspective view of a capsule for an aerosol generating device according to an exemplary embodiment.

[0008] [Diagram 2]FIG. 2 is a front view of the capsule of FIG.

[0009] [Diagram 3] FIG. 3 is a side view of the capsule of FIG.

[0010] [Figure 4] FIG. 4 is an end view of the capsule of FIG.

[0011] [Diagram 5] FIG. 5 is a partially exploded perspective view of the capsule of FIG.

[0012] [Figure 6] FIG. 6 is an additional exploded perspective view of the capsule of FIG.

[0013] [Figure 7] FIG. 7 is a further exploded perspective view of the capsule of FIG.

[0014] [Figure 8] FIG. 8 is a perspective view of an aerosol generating device according to an exemplary embodiment.

[0015] [Figure 9] FIG. 9 is an exploded perspective view of the aerosol generating device of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Several detailed exemplary embodiments are disclosed herein. However, the specific structural and functional details disclosed herein are merely representative for purposes of describing the exemplary embodiments. However, the exemplary embodiments may be embodied in many alternative forms and should not be construed as being limited to only the exemplary embodiments set forth herein.

[0017] Thus, while exemplary embodiments are susceptible to various modifications and alternative forms, exemplary embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that there is no intention to limit the exemplary embodiments to the particular forms disclosed, but on the contrary, the exemplary embodiments are intended to cover all modifications, equivalents, and alternatives thereof. Like numbers refer to like elements throughout the description of the figures.

[0018] When an element or layer is referred to as being "on," "connected to," "coupled to," "attached to," "adjacent to," or "covering" another element or layer, it should be understood that it may be directly connected to, coupled to, attached to, adjacent to, or covering the other element or layer, or that intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers. As used herein, like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations or subcombinations of one or more of the associated listed items.

[0019] In this specification, terms such as first, second, third, etc. may be used to describe various elements, regions, layers, and / or sections, but it should be understood that these elements, regions, layers, and / or sections should not be limited by these terms. These terms are used only to distinguish one element, region, layer, or section from another region, layer, or section. Thus, a first element, region, layer, or section described below can be referred to as a second element, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0020] For ease of description, spatially relative terms (e.g., "beneath," "below," "lower," "above," "upper," etc.) may be used herein to describe the relationship of one element or feature to another element or feature as depicted in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device during use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures were turned over, elements described as "below" or "beneath" other elements or features would be oriented "above" the other elements or features. Thus, the term "below" may encompass both an orientation above and below. Also, the device may be otherwise oriented (rotated 90 degrees, oriented in other directions, etc.) and the spatially relative descriptors used herein would be interpreted accordingly.

[0021] The terms used herein are for the purpose of describing various exemplary embodiments only and are not intended to limit the exemplary embodiments. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It will be further understood that the terms "includes," "including," "comprises," and / or "comprising," as used herein, specify the presence of stated features, integers, steps, operations, and / or elements, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or groups thereof.

[0022] In this specification, when the words "about" and "substantially" are used in connection with numerical values, unless expressly defined otherwise, the associated numerical value is intended to include a tolerance of ±10% around the stated numerical value. Additionally, when the terms "generally" or "substantially" are used in connection with geometric shapes, precision in the geometric shapes is not required, but degrees of freedom with respect to the shapes are intended to be within the scope of the present disclosure. Additionally, whether a numerical value or shape is modified "about," "generally," or "substantially," it will be understood that these numerical values ​​and shapes should be interpreted as including manufacturing or operating tolerances (e.g., ±10%) around the stated numerical value or shape.

[0023] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which the exemplary embodiments belong. Terms, including those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0024] The hardware may be implemented using processing or control circuitry such as, but not limited to, one or more processors, one or more central processing units (CPUs), one or more microcontrollers, one or more arithmetic logic units (ALUs), one or more digital signal processors (DSPs), one or more microcomputers, one or more field programmable gate arrays (FPGAs), one or more system-on-chips (SoCs), one or more programmable logic units (PLUs), one or more microprocessors, one or more application specific integrated circuits (ASICs), or other devices capable of responding to and executing instructions in a defined manner.

[0025] FIG 1 is a perspective view of a capsule for an aerosol generating device according to an exemplary embodiment. Referring to FIG 1, a capsule 100 for an aerosol generating device includes a housing configured to hold an aerosol-forming substrate and facilitate heating of the aerosol-forming substrate via conduction to generate an aerosol. As described in more detail herein, the housing may define an inlet opening for incoming air, an outlet opening for outgoing aerosol, and an internal channel for the aerosol-forming substrate, the internal channel being between the inlet opening and the outlet opening.

[0026] In the exemplary embodiment, the housing includes a body portion 130, a first end cap 110, and a second end cap 120. The first end cap 110 may be secured to an upstream end of the body portion 130, and the second end cap 120 may be secured to a downstream end of the body portion 130 (or vice versa). In particular, the first end cap 110 and the second end cap 120 are configured to engage with the body portion 130 such that each of the inlet openings of the first end cap 110 is in fluid communication with a corresponding outlet opening of the second end cap 120 through a corresponding internal channel of the body portion 130. The first end cap 110 and the second end cap 120 may be formed of a suitable plastic (e.g., via molding) or metal (e.g., via deep drawing, such as deep drawn aluminum). As used herein, "upstream" (and conversely, "downstream") refers to the flow of the aerosol, and "proximal" (and conversely, "distal") refers to the adult operator of the device generating the aerosol.

[0027] The first end cap 110 defines a plurality of first openings 112 as inlet openings, and the second end cap 120 defines a plurality of second openings 122 (e.g., FIG. 5) as outlet openings. The inlet openings are configured to allow air to enter the capsule 100, and the outlet openings are configured to allow aerosol to exit the capsule 100. The body portion 130 defines an internal channel in fluid communication with the inlet and outlet openings. The internal channel is configured to hold an aerosol-forming substrate and extend along the longest dimension of the housing.

[0028] The capsule 100 may have a slab-like configuration to facilitate heating of the aerosol-forming substrate therein via conduction. For example, the housing may have a length, width, and thickness that result in a slab-like configuration. The length of the housing extends from the upstream end face of the capsule 100 to the downstream end face of the capsule 100, and thus includes the corresponding dimensions of the first end cap 110 and the second end cap 120 that extend beyond the body portion 130. However, it should be understood that in examples where the first end cap 110 and the second end cap 120 are configured to seat flush with the upstream and downstream rims of the body portion 130, respectively (so as not to extend beyond the body portion 130), the length of the housing may just correspond to the length of the body portion 130. The width of the housing extends perpendicular to the length along the alignment direction of the plurality of first openings 112 (or the plurality of second openings 122). The thickness of the housing extends perpendicular to the length and the width. As shown, the length of the housing is greater than its width (e.g., average width, maximum width), and the width is greater than its thickness (e.g., average thickness, maximum thickness). An interior channel defined by body portion 130 extends along the length.

[0029] 2 is a front view of the capsule of FIG. 1. With reference to FIG. 2, the length and width of the housing are illustrated, but not the thickness. With respect to the width of the housing, the portion of the housing corresponding to the first end cap 110 and the second end cap 120 is wider than the portion of the housing corresponding to the body portion 130. However, in another embodiment, the first end cap 110 and the second end cap 120 may be configured to be flush with the sidewall of the body portion 130. In such an example, the width of the housing may be considered to be uniform.

[0030] FIG. 3 is a side view of the capsule of FIG. 1. With reference to FIG. 3, the length and thickness of the housing are illustrated, but the width is not. With respect to the thickness of the housing, the portions of the housing corresponding to the first end cap 110 and the second end cap 120 are thicker than the portions of the housing corresponding to the body portion 130. However, in another example, the first end cap 110 and the second end cap 120 may be configured to be flush with the front and rear walls of the body portion 130. In such an example, the thickness of the housing can be considered to be uniform. In an exemplary embodiment, the thickness of the housing is configured to promote uniform heating of the aerosol-forming substrate 160 (FIG. 5) within the capsule 100.

[0031] FIG. 4 is an end view of the capsule of FIG. 1. Referring to FIG. 4, the first end cap 110 may have a shape similar to a rectangle with a pair of opposing semicircular ends (e.g., an elongated circle, an oval, a disc corner) based on an upstream end view of the capsule 100. However, in another embodiment, the first end cap 110 may have a rectangular shape with angular or rounded corners based on an upstream end view of the capsule 100. As shown, the plurality of first openings 112 may be equally spaced and linearly arranged. Alternatively, in some embodiments, the plurality of first openings 112 may be staggered (e.g., zigzag arranged). Furthermore, while the first end cap 110 is illustrated as defining seven first openings 112, it should be understood that the exemplary embodiment is not so limited. For example, the first end cap 110 may define more (e.g., eight) or fewer (e.g., six) openings based on the number of internal channels in the capsule 100.

[0032] 5 is a partially exploded perspective view of the capsule of FIG. 1. As shown, in addition to the first end cap 110 and the second end cap 120, the capsule 100 may include a corrugated structure 134 and a cover 132 configured to include the corrugated structure 134. In an exemplary embodiment, the combination of the corrugated structure 134 and the cover 132 may be considered the body portion 130. Furthermore, the cover 132 may be a conductive cover (e.g., a thermally conductive cover) that facilitates heating of the aerosol-forming substrate 160 via conduction. For example, the cover 132 may be made of a metal(s). The metal(s) may include aluminum (e.g., aluminum or an alloy thereof in the form of a foil). Additionally, the aluminum may be anodized aluminum.

[0033] In FIG. 5 , the cover 132 is shown separately while the first end cap 110 and the second end cap 120 are engaged with the corrugations 134. The first end cap 110 includes a plurality of first mating members 114 configured to engage with the upstream ends of the corrugations 134 while the second end cap 120 includes a plurality of second mating members 124 configured to engage with the downstream ends of the corrugations 134. In an exemplary embodiment, the first end cap 110 and the second end cap 120 are of identical construction and therefore interchangeable. In such an example, the first end cap 110 may engage with the downstream ends of the corrugations 134 and the second end cap 120 may engage with the upstream ends of the corrugations 134.

[0034] Each of the plurality of first fitting members 114 has one of the plurality of first openings 112 extending therethrough, with the remainder of the plurality of first openings 112 extending through adjacent portions of the first end cap 110 between the plurality of first fitting members 114. Similarly, each of the plurality of second fitting members 124 has one of the plurality of second openings 122 extending therethrough, while the remainder of the plurality of second openings 122 extend through adjacent portions of the second end cap 120 between the plurality of second fitting members 124 (e.g., not visible in FIG. 5, but shown in FIG. 7).

[0035] Figure 6 is an additional exploded perspective view of the capsule of Figure 5. Referring to Figure 6, the first end cap 110 is disengaged from the upstream end of the corrugations 134, while the second end cap 120 is engaged with the downstream end of the corrugations 134. Each of the plurality of first fitting members 114 and the plurality of second fitting members 124 has a shape configured to seat within a corresponding groove or trough of the corrugations 134. When seated, each of the plurality of first fitting members 114 and the plurality of second fitting members 124 may also be separated from adjacent fitting members by a ridge or crest of the corrugations 134.

[0036] As shown, the corrugated structure 134 may have a cross section resembling a trapezoidal wave. In such an example, each of the first and second mating members 114, 124 may have an inverted trapezoid (e.g., an inverted isosceles trapezoid) configured to seat in a corresponding groove or valley of the corrugated structure 134 (based on the orientation shown in FIG. 6). Additionally, the end first and second mating members 114, 124 may have an inverted right-angle trapezoid shape. Thus, the first and second mating members 114 may include two mating members having an inverted isosceles trapezoid shape and two mating members having an inverted right-angle trapezoid shape, and the second mating members 124 may similarly include two mating members having an inverted isosceles trapezoid shape and two mating members having an inverted right-angle trapezoid shape. However, it should be understood that other configurations are possible. For example, alternatively, the corrugated structure 134 may have a cross-section resembling a square wave, a triangular wave, a sawtooth wave, or a sine wave, and the plurality of first mating members 114 and the plurality of second mating members 124 may be shaped accordingly.

[0037] 7 is a further exploded perspective view of the capsule of FIG. 6. Referring to FIG. 7, the corrugated structure 134 has been detached from both the first end cap 110 and the second end cap 120. The corrugated structure 134 has alternating ridges 136 and grooves 138 as internal channels configured to hold an aerosol-forming substrate. In an exemplary embodiment, the internal channels provided by the ridges 136 and grooves 138 are separate and independent conduits. It should be understood that the ridges 136 on the front side of the corrugated structure 134 shown in FIG. 7 become grooves 138 on the rear side of the corrugated structure 134. Conversely, the grooves 138 on the front side of the corrugated structure 134 shown in FIG. 7 become ridges 136 on the rear side of the corrugated structure 134.

[0038] In an exemplary embodiment, the front side of the corrugations 134 shown in FIG. 7 has three ridges 136 and four grooves 138, and the rear side of the corrugations 134 has four ridges 136 and three grooves 138. In such an example, the corrugations 134 define seven interior channels corresponding to the first openings 112 (seven total) of the first end cap 110 and the second openings 122 (seven total) of the second end cap 120. In particular, four interior channels may be provided by the four grooves 138 on the front side of the corrugations 134 shown in FIG. 7, while three interior channels may be provided by the three grooves 138 on the rear side of the corrugations 134.

[0039] As shown, each of the ridges 136 and grooves 138 of the corrugations 134 may have a coplanar surface between a pair of angled surfaces. For example, the coplanar surface on the front side of the corrugations 134 shown in FIG. 7 may be in the form of three ridge top strips and four fallow bottom strips extending between the first end cap 110 and the second end cap 120. Similarly, the coplanar surface on the back side of the corrugations 134 may be in the form of four ridge top strips and three fallow bottom strips extending between the first end cap 110 and the second end cap 120. The coplanar strips may run parallel. It should be understood that the tops of the ridges 136 on the front side of the corrugations 134 shown in FIG. 7 become the bottoms of the grooves 138 on the back side of the corrugations 134. Conversely, the bottoms of the grooves 138 on the front side of the corrugations 134 shown in FIG. 7 become the tops of the ridges 136 on the back side of the corrugations 134.

[0040] The corrugated structure 134 is formed of a suitable material having sufficient rigidity to maintain the integrity of the ridges 136 and grooves 138 when the aerosol-forming substrate is loaded into the interior channel of the capsule 100. For example, the corrugated structure 134 may be formed of a plant-based sheet material (e.g., corrugated board such as concertina corrugated board, paperboard, or molded pulp). The plant-based sheet material may be made from wood, bamboo, tobacco, and / or hemp (e.g., bamboo and tobacco pulp). In another embodiment, the corrugated structure 134 may be formed of plastic or metal.

[0041] The cover 132 is configured to receive the corrugations 134, surrounding the ridges 136 and grooves 138, when the capsule 100 is assembled. In an exemplary embodiment, the ridges 136 and grooves 138 are configured to contact opposing inner surfaces of the cover 132 when the corrugations 134 are received within the cover 132. Opposing end folds of the corrugations 134 may also contact opposing inner side walls of the cover 132 when the corrugations 134 are received within the cover 132. As a result, the corrugations 134 may have nine sections that contact the cover 132, although the exemplary embodiment is not so limited. Additionally, the cover 132 is configured to receive the first end cap 110 and the second end cap 120, such that at least the first mating member 114 and the second mating member 124, respectively, are within the cover 132 and thus hidden from view when the capsule 100 is assembled. As shown, the cover 132 may be in the form of a box sleeve.

[0042] To assemble the capsule 100, the first end cap 110 may be engaged with the corrugations 134 such that each of the plurality of first mating members 114 seats within a corresponding groove 138. The corrugations 134 and first end cap 110 may then be inserted into the cover 132 until a flanged portion of the first end cap 110 abuts the upstream rim of the cover 132. Alternatively, the corrugations 134 may be first received within the cover 132 before the first end cap 110 is inserted to engage both the corrugations 134 and the cover 132. In either example, a portion of the upstream end of the corrugations 134 may be between (e.g., pressed between) the plurality of first mating members 114 and the cover 132. The engagement between the first end cap 110 and the cover 132 may be via an interference fit (sometimes referred to as a press fit or friction fit). Additionally, instead of or in addition to an interference fit, the first end cap 110 may be secured to the cover 132 using an adhesive (e.g., an adhesive) deemed food safe or otherwise acceptable by a regulatory agency.

[0043] Once the corrugations 134 and the first end cap 110 are engaged with the cover 132, the aerosol-forming substrate may then be loaded into the internal channels. As described above, the internal channels are defined by the body 130, including the cover 132 and the corrugations 134. In particular, each internal channel may be considered to be defined by the grooves 138 of the corrugations 134 and the corresponding inner surface of the cover 132. As a result, the four grooves 138 on the front side of the corrugations 134 and the corresponding inner surface of the cover 132 shown in FIG. 7 define four internal channels, and the three grooves 138 on the rear side of the corrugations 134 and the corresponding inner surface of the cover 132 define three internal channels. In this manner, seven internal channels may be defined by the corrugations 134 and the cover 132.

[0044] In an exemplary embodiment, one type of aerosol-forming substrate may be loaded into the capsule 100. In such an example, the same aerosol-forming substrate may be loaded into each of the internal channels defined by the body portion 130 of the capsule 100. In another exemplary embodiment, multiple types of aerosol-forming substrates may be loaded into the capsule 100. For example, a first type of aerosol-forming substrate may be loaded into a first group of internal channels (e.g., the four internal channels on the front side of the corrugated structure 134 shown in FIG. 7), and a second type of aerosol-forming substrate may be loaded into a second group of internal channels (e.g., the three internal channels on the back side of the corrugated structure 134). In yet another exemplary embodiment, for one or more of the internal channels defined by the body portion 130 of the capsule 100, a mixture of different types of aerosol-forming substrates may be loaded into the same internal channel. However, it should be understood that the exemplary embodiment is not limited thereto and other combinations are possible.

[0045] As discussed herein, an aerosol-forming substrate is a material or combination of materials that can result in an aerosol. Aerosol refers to a substance that is generated or output by the disclosed device, claims, and equivalents. The material may include a compound (e.g., nicotine, cannabinoids), and when the material is heated, an aerosol containing the compound is generated. The heating may be below combustion temperatures to generate the aerosol without substantial thermal decomposition of the aerosol-forming substrate or substantial generation of combustion by-products (if any). Thus, in exemplary embodiments, no thermal decomposition occurs during the heating and resulting production of the aerosol. In other examples, there may be thermal decomposition and combustion by-products, but the extent may be relatively minor and / or may be considered merely incidental.

[0046] The aerosol-forming substrate may be a fibrous material. For example, the fibrous material may be a plant material. The fibrous material is configured to release a compound when heated. The compound may be a naturally occurring component of the fibrous material. For example, the fibrous material may be a plant material such as tobacco, and the released compound may be nicotine. The term "tobacco" includes any tobacco plant material, including tobacco leaves, tobacco plugs, reconstituted tobacco, compressed tobacco, molded tobacco, or powdered tobacco, and combinations thereof from one or more tobacco plants, such as Nicotiana rustica and Nicotiana tabacum.

[0047] In some exemplary embodiments, the tobacco material may include material from any member of the Nicotiana genus. Additionally, the tobacco material may include a blend of two or more different tobacco varieties. Examples of suitable types of tobacco materials that may be used include, but are not limited to, flue-cured tobacco, burley tobacco, dark tobacco, Maryland tobacco, Oriental tobacco, rare tobacco, specialty tobacco, blends thereof, and the like. The tobacco material may be provided in any suitable form, including, but not limited to, tobacco lamina, processed tobacco materials such as volume-expanded tobacco or puffed tobacco, processed tobacco stems such as cut cigarette tobacco or cut puffed tobacco, reconstituted tobacco materials, blends thereof, and the like. In some exemplary embodiments, the tobacco material is in the form of a substantially dried tobacco mass. Additionally, in some exemplary embodiments, the tobacco material may be mixed and / or combined with at least one of propylene glycol, glycerin, subcombinations thereof, or combinations thereof.

[0048] The compound may also be a naturally occurring component of a medicinal plant that has been medically recognized for its therapeutic effects. For example, the medicinal plant may be a cannabis plant and the compound may be a cannabinoid. Cannabinoids interact with receptors in the body to exert a variety of effects. As a result, cannabinoids have been used for a variety of medicinal purposes (e.g., treating pain, nausea, epilepsy, and psychiatric disorders). The fibrous material may include leaves and / or flower material from one or more cannabis plants, such as Cannabis sativa, Cannabis indica, and Cannabis ruderalis. In some embodiments, the fibrous material is a mixture of 60-80% (e.g., 70%) Cannabis sativa and 20-40% (e.g., 30%) Cannabis indica.

[0049] Examples of cannabinoids include tetrahydrocannabinolic acid (THCA), tetrahydrocannabinol (THC), cannabidiol acid (CBDA), cannabidiol (CBD), cannabinol (CBN), cannabicyclol (CBL), cannabichromene (CBC), cannabigerol (CBG), etc. Tetrahydrocannabinolic acid (THCA) is the precursor of tetrahydrocannabinol (THC), and cannabidiol acid (CBDA) is the precursor of cannabidiol (CBD). Tetrahydrocannabinolic acid (THCA) and cannabidiol acid (CBDA) can be converted to tetrahydrocannabinol (THC) and cannabidiol (CBD), respectively, via heating. In an exemplary embodiment, the heat of the heater may cause decarboxylation to convert tetrahydrocannabinolic acid (THCA) in the capsule 100 to tetrahydrocannabinol (THC) and / or to convert cannabidiol acid (CBDA) in the capsule 100 to cannabidiol (CBD).

[0050] In an example where both tetrahydrocannabinolic acid (THCA) and tetrahydrocannabinol (THC) are present in the capsule 100, decarboxylation and the resulting conversion will cause a decrease in tetrahydrocannabinolic acid (THCA) and an increase in tetrahydrocannabinol (THC). At least 50% (e.g., at least 87%) of the tetrahydrocannabinolic acid (THCA) may be converted to tetrahydrocannabinol (THC) during heating of the capsule 100. Similarly, in an example where both cannabidiolic acid (CBDA) and cannabidiol (CBD) are present in the capsule 100, decarboxylation and the resulting conversion will cause a decrease in cannabidiol acid (CBDA) and an increase in cannabidiol (CBD). At least 50% (e.g., at least 87%) of the cannabidiol acid (CBDA) may be converted to cannabidiol (CBD) during heating of the capsule 100.

[0051] Further, the compound may include or may additionally include non-naturally occurring additives that are then introduced into the fibrous material. In one example, the fibrous material may include at least one of cotton, rayon, combinations thereof, and the like (e.g., in the form of gauze). In another example, the fibrous material may be a cellulosic material (e.g., a non-tobacco and / or non-cannabis material). In either example, the compound introduced may include nicotine, cannabinoids, and / or flavorants. Flavorants may be obtained from natural sources, such as plant extracts (e.g., tobacco extracts, cannabis extracts), and / or artificial sources. In yet another example, when the fibrous material includes tobacco and / or cannabis, the compound may be or may additionally include one or more flavorants (e.g., menthol, mint, vanilla). Thus, the compound in the aerosol-forming substrate may include naturally occurring components and / or non-naturally occurring additives. In this regard, it should be understood that the existing levels of naturally occurring components of the aerosol-forming substrate may be increased by supplementation. For example, the existing level of nicotine in a mass of tobacco may be increased through supplementation with an extract containing nicotine, similarly, the existing level of one or more cannabinoids in a mass of cannabis may be increased through supplementation with an extract containing such cannabinoids.

[0052] After loading the aerosol-forming substrate into the internal channel, the second end cap 120 is inserted into the cover 132 to engage the corrugations 134. In particular, the second end cap 120 may be inserted into the cover 132 until the flanged portion of the second end cap 120 abuts against the downstream rim of the cover 132. Furthermore, a portion of the downstream end of the corrugations 134 may be between (e.g., pressed between) the plurality of second fitting members 124 and the cover 132. The engagement between the second end cap 120 and the cover 132 may be via an interference fit. Furthermore, instead of or in addition to an interference fit, the second end cap 120 may be secured to the cover 132 with an adhesive deemed food safe or otherwise acceptable by a regulatory agency.

[0053] When the capsule 100 is assembled, the second fitting member 124 of the second end cap 120 will be seated in the same grooves 138 of the corrugations 134 as the first fitting member 114 of the first end cap 110. As a result, the first opening 112 extending through the first fitting member 114 of the first end cap 110 will be in fluid communication with the second opening 122 extending through the second fitting member 124 of the second end cap 120. Similarly, the first opening 112 extending between the first fitting members 114 of the first end cap 110 will be in fluid communication with the second opening 122 extending between the second fitting members 124 of the second end cap 120. Thus, during aerosol generation, incoming air entering the capsule 100 through the first opening 112 in the first end cap 110 will flow through the corresponding internal channels and the aerosol-forming substrate being heated therein, thereby entraining volatile materials released from the aerosol-forming substrate to generate an aerosol that is removed from the capsule 100 through the corresponding second opening 122 in the second end cap 120 at the opposite downstream end of the internal channels. In this manner, seven separate and independent air / aerosol streams can be considered to flow through the capsule 100 during aerosol generation by virtue of the seven internal channels defined therein.

[0054] While the above assembly process for capsule 100 has been discussed as terminating in engagement of second end cap 120 with cover 132 and corrugations 134, it should be understood that the assembly process may be reversed to instead terminate with engagement of first end cap 110 with cover 132 and corrugations 134. In any event, once assembled, capsule 100 may be as shown in FIG. 1. Although not shown, sealing strips may also be applied to each of the upstream end surface of first end cap 110 and the downstream end surface of second end cap 120 to cover first opening 112 and second opening 122, respectively (e.g., during preparation for packaging or during packaging) for the purpose of preserving the organoleptic properties of the aerosol-forming substrate.

[0055] FIG. 8 is a perspective view of an aerosol generating device according to an exemplary embodiment. Referring to FIG. 8, the aerosol generating device 300 includes a device body 330 defining at least one slot configured to receive a capsule 200 including an aerosol-forming substrate. The aerosol generating device 300 further includes a heating assembly configured to heat the capsule 200 and the aerosol-forming substrate therein to generate an aerosol. The heating assembly may include a first heater 310 and a second heater 320 (FIG. 9) configured to sandwich the capsule 200 therebetween to heat the aerosol-forming substrate via conduction. The first heater 310 and the second heater 320 may be configured to operate jointly or independently (e.g., to be able to provide different heating profiles). Additionally, the aerosol generating device 300 may include a first coupler 340 defining an air inlet and a second coupler 350 defining an aerosol outlet. The capsule 200 of FIG. 8 may be the same as the capsule 100 of FIGS. 1-7. As a result, the above relevant disclosures of common features should be understood to apply to this section and may not have been repeated for the sake of brevity.

[0056] FIG. 9 is an exploded view of the aerosol generating device of FIG. 8. Referring to FIG. 9, the device body 330 of the aerosol generating device 300 defines a slot 332 (e.g., a side slot for side loading) configured to receive the capsule 200 (FIG. 8). Additionally, the device body 330 of the aerosol generating device 300 may define front and rear openings configured to expose the front and rear of the cover of the capsule 200 (when the capsule 200 is received within the device body 330), respectively, to enable engagement with the first heater 310 and the second heater 320, respectively. The device body 330 may also define upstream openings (e.g., an upstream slot) and downstream openings (e.g., a downstream slot) configured to accommodate the first and second end caps of the capsule 200, respectively, to enable engagement with the first and second couplers 340 and 350, respectively. In an exemplary embodiment, the capsule 200 may alternatively be inserted into the device body 330 via an upstream opening (eg, bottom loading) and / or a downstream opening (eg, top loading).

[0057] The cover, first end cap, and second end cap of capsule 200 may be as described in connection with cover 132, first end cap 110, and second end cap 120 of capsule 100. Although not shown, it should be understood that capsule 200 may also include corrugations therein, which may be as described in connection with corrugations 134 of capsule 100. As a result, pertinent details already described above will not be repeated for the sake of brevity.

[0058] In an exemplary embodiment, the capsule 200 may be inserted into the slot 332 such that the capsule 200 abuts the opposing closed sides of the device body 330. The capsule 200 may then be engaged by the first coupler 340 and the second coupler 350. The first coupler 340 may define an elongated narrow opening (e.g., a first slit) configured to match at least a first opening of the first end cap of the capsule 200. For example, the length of the elongated narrow opening of the first coupler 340 may be greater than the linear span of the collective first openings in the first end cap of the capsule 200. Furthermore, the width of the elongated narrow opening of the first coupler 340 may be less than the diameter of the first opening of the first end cap of the capsule 200. During operation of the aerosol generating device 300, incoming air passes through the elongated narrow opening of the first coupler 340 and then enters the capsule 200 via the first opening of the first end cap.

[0059] Similarly, the second coupler 350 may define an elongated narrow opening (e.g., a second slit) configured to match at least the second opening of the second end cap of the capsule 200. For example, the length of the elongated narrow opening of the second coupler 350 may be greater than the linear span of the collective second openings in the second end cap of the capsule 200. Furthermore, the width of the elongated narrow opening of the second coupler 350 may be less than the diameter of the second opening of the second end cap of the capsule 200. During operation of the aerosol generating device 300, the generated aerosol exits the capsule 200 through the second opening of the second end cap and then continues through the elongated narrow opening of the second coupler 350. From a structural point of view, the second coupler 350 may be identical to the first coupler 340, although exemplary embodiments are not limited thereto.

[0060] The first heater 310 and the second heater 320 are configured to physically contact the cover of the capsule 200 when the capsule 200 is fully engaged within the aerosol generating device 300. In an exemplary embodiment, the first heater 310 and the second heater 320 may additionally overlap the first and second end caps of the capsule 200 without physically contacting the first and second end caps (through the intervening cover of the capsule 200). Furthermore, the engagement of the inner surface of the first heater 310 is configured to interface with a majority (e.g., at least 80%) of the first side (e.g., front side) of the cover of the capsule 200. Similarly, the engagement of the inner surface of the second heater 320 may be configured to interface with a majority (e.g., at least 80%) of the opposing second side (e.g., rear side) of the cover of the capsule 200. As a result, a desired level of thermal contact may be established to heat the aerosol-forming substrate within the capsule 200 via conduction to generate an aerosol.

[0061] The first heater 310 and the second heater 320 may utilize resistive heating elements and may be embodied as ceramic, silicon, wire, or mesh heaters as known in the art. From a structural standpoint, the first heater 310 may be identical to the second heater 320, although the exemplary embodiment is not limited thereto. Furthermore, in some examples, the aerosol generating device 300 may be configured such that the incoming air first flows along the outer surface of the first heater 310 and / or the outer surface of the second heater 320 (e.g., in a direction from the second coupler 350 toward the first coupler 340) before passing through the first coupler 340. In another example, a separate upstream heater may be provided to heat the incoming air before passing through the first coupler 340. In either example, the incoming air may be heated (e.g., preheated) before passing through the first coupler 340 into the capsule 200 to heat the aerosol-forming substrate therein via convection.

[0062] Although not shown, it is understood that the aerosol generating device 300 may include additional structures / components configured to provide a desired aesthetic and / or functionality. For example, the aerosol generating device 300 may include an external housing structure designed to be visually appealing while being sized to be portable and configured to facilitate handling (e.g., ergonomic shape for one-handed operation). Also provided within the external housing structure may be an actuation mechanism, a power source, and control circuitry. The actuation mechanism (e.g., a rack-and-pinion arrangement and / or a spring-loaded arrangement) may be configured to move the first coupler 340, the second coupler 350, the first heater 310, and / or the second heater 320 to engage the capsule 200. The actuation mechanism may also provide confirmation feedback (e.g., an audible click) indicating that the capsule 200 is properly inserted and engaged (e.g., locked in). The power source may include one or more batteries (e.g., a rechargeable battery arrangement). Upon engagement of the capsule 200, the control circuitry may instruct the power source to provide current to the first heater 310 and the second heater 320. The instruction to provide current from the power source may be in response to a manual operation (e.g., a button actuation) or an automatic operation (e.g., a puff actuation). As a result of the current, the capsule 200 may be conductively heated by the first heater 310 and the second heater 320 to generate an aerosol. The aerosol generated within the capsule 200 may pass through the second coupler 350 and, optionally, be inhaled from the aerosol generating device 300 via a mouthpiece.

[0063] The capsules and devices disclosed herein may be used to heat an aerosol-forming substrate to generate an aerosol. In an exemplary embodiment, a method of generating an aerosol may include engaging a capsule 200 between a first heater 310 and a second heater 320. The capsule 200 may define an internal channel that holds the aerosol-forming substrate. The method may further include heating the aerosol-forming substrate via conduction with the first heater 310 and the second heater 320. Additionally, the incoming air entering the capsule 200 may be optionally heated air to also facilitate heating of the aerosol-forming substrate via convection. In this manner, the aerosol-forming substrate may be conductively and / or convectively heated to generate an aerosol.

[0064] In addition to the non-limiting embodiments described herein, additional details of the substrates, capsules, devices, and methods discussed herein are discussed below, the disclosures of each of which are incorporated herein by reference in their entirety. No. 16 / 451,662, filed June 25, 2019, entitled "CAPSULES, HEAT-NOT-BURN (HNB) AEROSOL-GENERATING DEVICES, AND METHODS OF GENERATING AN AEROSOL" (Atty. Dkt. No. 24000NV-000522-US); No. 16 / 252,951, filed January 21, 2019, entitled "CAPSULES, HEAT-NOT-BURN (HNB) AEROSOL-GENERATING DEVICES, AND METHODS OF GENERATING AN AEROSOL" (Atty. Dkt. No. 24000NV-000521-US); No. 15 / 845,501, filed December 18, 2017, entitled "A VAPORIZER FOR VAPORIZING AN ACTIVE INGREDIENT" (Atty. Dkt. No. 24000DM-000012-US); and U.S. application Ser. No. 15 / 559,308, filed September 18, 2017, entitled "A VAPORIZER FOR VAPORIZING AN ACTIVE INGREDIENT" (Atty. Dkt. No. 24000DM-000003-US-NP).

[0065] While a number of exemplary embodiments are disclosed herein, it should be understood that other variations are possible. Such variations are not to be regarded as a departure from the spirit and scope of the present disclosure, and all such modifications as would be apparent to one skilled in the art are intended to be included within the scope of the following claims.

Claims

1. A capsule for an aerosol generating device, comprising: Equipped with a housing, the housing defines an inlet opening, an outlet opening, and an interior channel between the inlet opening and the outlet opening; the internal channel is configured to hold an aerosol-forming substrate; the housing is configured to facilitate heating of the aerosol-forming substrate via conduction to generate an aerosol; The housing includes a corrugated structure and a conductive cover; The corrugated structure has alternating ridges and grooves and combines with the conductive cover to define the interior channel, the capsule.

2. 2. The capsule according to claim 1, the inlet opening is configured to allow air to enter the capsule; The exit opening is configured to allow the aerosol to exit the capsule.

3. 2. The capsule according to claim 1, The internal channels are separate and independent conduits, said capsule.

4. 2. The capsule according to claim 1, The capsule, wherein the housing includes a body portion, a first end cap, and a second end cap.

5. The capsule according to claim 4, the first end cap is secured to an upstream end of the body portion; The second end cap is secured to the downstream end of the body portion.

6. The capsule according to claim 4, the body portion defines the interior channel; the first end cap defining the inlet opening; The second end cap defines the exit opening.

7. 7. The capsule according to claim 6, the first end cap and the second end cap are configured to engage with the body portion such that each of the inlet openings of the first end cap is in fluid communication with a corresponding outlet opening of the second end cap through a corresponding internal channel of the body portion.

8. The capsule according to claim 4, The body portion includes the corrugated structure and the conductive cover configured to contain the corrugated structure.

9. 2. The capsule according to claim 1, Each of the ridges and grooves has a coplanar surface between a pair of angled surfaces.

10. 2. The capsule according to claim 1, The conductive cover is configured to surround the ridges and grooves of the corrugated structure.

11. 9. The capsule according to claim 8, The capsule, wherein the corrugated structure comprises a portion having a cross section resembling a trapezoidal wave.

12. 9. The capsule according to claim 8, The conductive cover is in the form of a box sleeve.

13. 9. The capsule according to claim 8, The conductive cover is made of metal.

14. 14. The capsule of claim 13, The metal comprises aluminum, capsule.

15. 2. The capsule according to claim 1, The housing is configured such that the interior channel extends along a longest dimension of the housing.

16. 2. The capsule according to claim 1, The housing has a length, a width and a thickness, The capsule, wherein the length is greater than the width, the width is greater than the thickness, and the interior channel extends in the direction of the length.

17. 2. The capsule according to claim 1, The aerosol-forming substrate comprises a plant material.

18. 18. The capsule of claim 17, The plant material comprises tobacco.

19. The capsule of claim 16, The ridges and grooves alternate in the width direction of the housing.

20. An aerosol generating device, comprising: The device comprises a body and a heating assembly, The device body defines at least one slot configured to receive a capsule containing the aerosol-forming substrate, the capsule being as defined in claim 1 ; the device body has a first side structure and a second side structure, the first side structure partially defines the at least one slot and is configured to receive the capsule therein; the second side structure faces the first side structure and is closed; the heating assembly is configured to heat the capsule containing the aerosol-forming substrate to generate an aerosol; the heating assembly includes a first heater and a second heater; The aerosol generating device, wherein the first heater and the second heater are configured to partially define the at least one slot therebetween and are configured to heat the aerosol-forming substrate by conduction when the capsule is received therein.

21. 1. A method for generating an aerosol, comprising: Engaging the capsule of claim 1 in a slot defined by a first heater and a second heater, the capsule being engaged in the slot such that the interior channel is sandwiched between the first heater and the second heater; heating the aerosol-forming substrate by conduction between the first heater and the second heater.

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