EP3397084B1 - Article de génération d'aérosol cassable - Google Patents

Article de génération d'aérosol cassable Download PDF

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Publication number
EP3397084B1
EP3397084B1 EP16819320.9A EP16819320A EP3397084B1 EP 3397084 B1 EP3397084 B1 EP 3397084B1 EP 16819320 A EP16819320 A EP 16819320A EP 3397084 B1 EP3397084 B1 EP 3397084B1
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EP
European Patent Office
Prior art keywords
heat source
aerosol
generating article
tubular element
aerosol generating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16819320.9A
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German (de)
English (en)
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EP3397084A1 (fr
Inventor
Alexandre Malgat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
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Philip Morris Products SA
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Publication of EP3397084A1 publication Critical patent/EP3397084A1/fr
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/10—Devices with chemical heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/10—Cigars; Cigarettes with extinguishers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/22—Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
    • A24D3/0291—Manufacture of tobacco smoke filters for filters with special features for hollow tipped filters, e.g. recess filters
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/60—Constructional details

Definitions

  • the present invention relates to an aerosol generating article, such as a smoking article, having a combustible heat source for heating an aerosol-forming substrate downstream of the combustible heat source.
  • a number of smoking articles in which tobacco is heated rather than combusted have been proposed in the art.
  • An aim of such 'heated' smoking articles is to reduce known harmful smoke constituents of the type produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes.
  • an aerosol is generated by the transfer of heat from a combustible heat source to a physically separate aerosol-forming substrate, such as tobacco.
  • the aerosol-forming substrate may be located within, around or downstream of the combustible heat source.
  • WO-A2-2009/022232 discloses a smoking article comprising a combustible heat source, an aerosol-forming substrate downstream of the combustible heat source, and a heat-conducting element around and in contact with a rear portion of the combustible heat source and an adjacent front portion of the aerosol-forming substrate.
  • volatile compounds are released from the aerosol-forming substrate by heat transfer from the combustible heat source and entrained in air drawn through the smoking article. As the released compounds cool, they condense to form an aerosol that is inhaled by the user.
  • WO 2013/104616 A1 discloses a smoking article formed from two component parts. These parts are a rod comprising an aerosol-forming substrate and a removable cap.
  • the removable cap can be coupled to the rod in two configurations. In a first configuration, the removable cap is coupled to a first end of the rod and a heat source located at or near a second end of the rod heats the aerosol-forming substrate to generate an inhalable aerosol. In a second configuration, the removable cap is coupled to the second end of the rod and at least substantially covers the heat source.
  • the smoking article is arranged in the second configuration for disposal.
  • Smoking articles which include a combustible fuel element or heat source may have a combustion zone or zone of heating that is larger, more dense, and not as readily extinguished by crushing or "stubbing out" the heat source compared to a conventional cigarette, in which tobacco is burnt or combusted to heat and release volatile compounds from the tobacco.
  • Such smoking articles may have a heat source that contains significantly more energy in the form of heat than found in the combustion zone of a conventional cigarette. Consequently, such smoking articles may require more effort to extinguish or to remove sufficient heat to facilitate disposal.
  • an improved aerosol generating article particularly one that includes a combustible fuel element or heat source.
  • an aerosol generating article having an element for facilitating disposal of the aerosol generating article after use and which is both simple to manufacture and use.
  • an aerosol generating article comprising: a first section having a combustible heat source and an aerosol-forming substrate; and a second section having a tubular element defining a recess at one end of the second section, wherein the first and second sections are integrally connected at a region of weakness, the first section and second section being separable at the region of weakness to enable the tubular element to be placed over the combustible heat source, after use of the aerosol generating article, such that the combustible heat source is at least partially received in the recess wherein the first section is upstream of the second section when the first and second sections are integrally connected at the region of weakness, wherein the tubular element is at least partially open at both of its ends such that, during use of the aerosol generating article, air may be drawn along the aerosol generating article through the tubular element, and wherein the tubular element is either at the downstream end of the second section, such that the recess forms a mouth end cavity of the aero
  • the present invention provides a simple to manufacture and simple to use aerosol generating article having an integral means of facilitating disposal.
  • a barrier is formed between the combustible heat source and an outer surface of the aerosol generating article.
  • the heat source may be shielded by the tubular element until it has cooled to a sufficiently low temperature to be disposed of easily.
  • the tubular element hinders a supply of air to the combustible heat source, facilitating the extinguishing of the combustible heat source. This may be particularly advantageous, since the combustion zone or zone of heating of aerosol generating articles having a combustible heat source is larger, more dense, and not as readily extinguished by crushing or "stubbing out" compared to a conventional cigarette.
  • the tubular element is formed as an integral part of the aerosol generating article. This results in a reduced chance of accidental separation of the tubular element from the rest of the aerosol generating article, for example during transport or storage, in comparison to aerosol generating articles having a separately formed extinguisher cap. It may also prevent the tubular element from being mislayed, or misplaced prior to use, as may be the case with aerosol generating articles having a separately formed extinguisher cap.
  • Connecting the first and second sections at a region of weakness advantageously allows the aerosol generating article to be split in two by a user without undue burden by separating the first and second sections.
  • the tubular element can then be placed over the heat source after use of the aerosol generating article.
  • providing the tubular element as an integral part of the aerosol generating article mitigates difficulties arising from size variations due to manufacturing tolerances that may occur when assembling aerosol generating articles having a separately formed extinguisher cap or heat shielding element.
  • the region of weakness may be present as a result of the first and second sections having an interface at the region.
  • the tensile strength of any wrapping for example paper layer at the interface at the region of weekness is less than the tensile strength of inner elements of the first section and the second section such that separation occurs in the region of the interface.
  • the tensile strength of the wrapping is less than 50%, or less than 20% or less than 10% of the inner elements.
  • the region of weakness for example one or more perforations or other formation is provided at the region of weakness, for example to reduce the tensile strength of the wrapping or other connection at the region of weakness.
  • the metallised wrapping includes one or more perforations.
  • the terms "integral” and “integrally” are used to mean that the first and second sections share at least one component by which they are joined. That is, the first and second sections are joined by a component forming part of both the first section and the second section.
  • the first section and second section may be integrally connected by a wrapper forming part of both the first and second sections.
  • the term "integrally connected” excludes discrete first and second sections which are held together by friction or by fastening means, such as glue or a threaded connection.
  • the first section which includes the heat source and the aerosol forming substrate, is upstream of the second section when the first and second sections are integrally connected at the region of weakness.
  • the tubular element is at least partially open at both of its ends such that during use of the aerosol generating article air may be drawn along the aerosol generating article through the tubular element.
  • the tubular element defines part of the airflow pathway through the assembled aerosol-generating article.
  • the overall length of the aerosol generating article may be easily adjusted to a desired value, for example to a length similar to that of a conventional cigarette, through an appropriate choice of the length of the tubular element.
  • the first and second sections are circumscribed by a wrapper, for example an outer wrapper of the aerosol-generating article
  • the arrangement of the present invention allows the tubular element to be provided entirely within the outer diameter of the wrapper. This means that the outer diameter of the assembled aerosol-generating article may be substantially unaffected by the presence of the tubular element. This may be beneficial for ease of use and for overall appearance of the assembled aerosol-generating article.
  • the tubular element is a hollow tube that is open at both ends. In such embodiments, air may be drawn along the aerosol generating article through the tubular element without the tubular element having any significant effect on the resistance to draw of the aerosol generating article.
  • the resistance-to-draw (RTD) of an aerosol generating article refers to the static pressure difference between the two ends of the specimen when it is traversed by an air flow under steady conditions in which the volumetric flow is 17.5 millilitres per second at the output end.
  • the RTD of a specimen can be measured using the method set out in ISO Standard 6565:2002.
  • the second section may form a downstream end, or mouth end, of the aerosol generating article.
  • the tubular element may be at any suitable position along the second section, provided that the combustible heat source can be received in the recess defined by the tubular element when the first and second sections have been separated at the region of weakness.
  • the tubular element is at the downstream end of the second section and forms a mouth end cavity of the aerosol generating article when the first and second sections are integrally connected.
  • the tubular element may be at the upstream end of the second section and form a transfer element of the aerosol generating article.
  • the tubular element may be at the upstream end of the second section and form a transfer element of the aerosol generating article between the aerosol-forming substrate and a mouthpiece of the aerosol generating article.
  • the tubular element may be at the upstream end of the second section and form a transfer element of the aerosol generating article between the aerosol-forming substrate and a mouthpiece of the second section.
  • the aerosol generating article may further comprise a removable cap at the distal end of the first section for protecting the heat source prior to use of the aerosol generating article.
  • the term 'cap' refers to a protective cover that substantially surrounds the distal end of the aerosol generating article, including the end face .
  • a removable cap either as a separate component or with the tubular element, the user is inhibited from readily igniting the heat source until the cap is removed, unlike paper wrappers, which do not prevent or obstruct the user from igniting the heat source while the paper wrapper remains intact and covering the heat source.
  • providing a removable cap that is removed prior to ignition of the heat source may lead to a reduction in ash generation and flaming compared to aerosol generating articles with a paper wrapper that covers the heat source during ignition.
  • a paper wrapper can burn rapidly leading to flaming and generation of ash when the aerosol generating article is ignited.
  • the removable cap may enable a more hygienic aerosol generating article to be provided.
  • the cap reduces the risk of the user coming into direct contact with the heat source, and so reduces the risk that the heat source will soil the user's clothes or hands.
  • the provision of the removable cap advantageously reduces the risk of the heat source dirtying the manufacturing equipment, and staining adjacent aerosol generating articles.
  • the removable cap acts to isolate the heat source from the surrounding equipment and aerosol generating articles.
  • it provides physical protection during manufacture to help prevent the heat source from breaking or chipping off.
  • aerosol generating articles according to the invention may comprise a removable cap attached at a line of weakness to the distal end of the aerosol generating article, wherein the cap comprises a cylindrical plug of material circumscribed by a wrapper as described in WO-A1-2014/086998 .
  • the aerosol-forming substrate may be downstream of the heat source.
  • the aerosol-forming substrate may be positioned concentrically within or around the heat source.
  • Aerosol generating articles comprise a mouth end and an opposed distal end. In use, a user draws on the mouth end of the aerosol generating article. The mouth end is downstream of the distal end. The heat source is located at or proximate to the distal end.
  • the tubular element may be substantially rigid.
  • the shape of the recess may be substantially maintained during placement of the tubular element over the combustible heat source. This facilitates receipt of the combustible heat source in the recess after use of the aerosol generating article.
  • the tubular element has a wall thickness between about 100 micrometer and 300 micrometer, for example 200 micrometer.
  • the above mentioned wall thicknesses can provide suitable stability in some examples, for example where the tubular element comprises paper or cardboard for when the heat source is inserted into the tubular element.
  • the tubular element may include a reinforcing formation, for example a tubular insert.
  • the tubular element When the tubular element is placed over the combustible heat source after use of the aerosol generating article, the combustible heat source is at least partially received in the recess to facilitate disposal of the aerosol generating article.
  • the tubular element may be arranged such that when the combustible heat source is received in the recess, the tubular element extends along at least 90 percent of the length of the combustible heat source, for example leaving about 1mm of the length of the combustible heat source uncovered.
  • the tubular element is arranged such that, when the combustible heat source is received in the recess, the tubular element extends along substantially the entire length of the combustible heat source.
  • the tubular element is arranged such that, when the combustible heat source is ignited and received within the recess, the tubular element sufficiently restricts the supply of air to the combustible heat source so that the combustible heat source is extinguished by the tubular element.
  • the tubular element is substantially impermeable to air.
  • the gap between the external surface of the heat source and the internal surface of the tubular element is preferably less than about 2 mm, more preferably less than about 1 mm. With this small gap, there is restricted access of oxygen to the heat source as compared to when the heat source is free to burn without the tubular element.
  • the emission of combustion gases from the heat source further restricts the flow of oxygen to the heat source because the small gap between the tubular element and the heat source reduces the mixing rate of the combustion gases with the surrounding air.
  • the tubular element is configured such that, when the combustible heat source is received within the recess, there is a frictional fit between the inner surface of the tubular element and the outer surface of the combustible heat source. Providing such a frictional fit allows the tubular element to be held over the combusibtle heat source without any additional connecting means to be provided.
  • An inner surface of the tubular element may comprise a non-combustible material.
  • the tubular element may be formed from a non-combustible material.
  • An inner surface of the tubular element may be lined with a non-combustible material.
  • the non-combustible material may be applied as a coating formed by applying one or more intumescent varnishes, paints, lacquers, or any combination thereof on the inner surface of the tubular element. For example, by brushing, rolling, dipping or spraying or by using a non-combustible sheet that is formed into the final shape of the tubular element by any known manufacturing processes, such as cutting, rolling and gluing systems.
  • the non-combustible material may be at least one of: a metal; a metal oxide; a ceramic; and a stone. Further, the non-combustible material may be graphite.
  • non-combustible is used to describe a material that is substantially non-combustible at temperatures reached by the combustible heat source during combustion and ignition thereof.
  • the tubular element may comprise a thermochromatic material or pigment.
  • Thermochromatic pigments or materials change colour with respect to temperature. This has the advantage of providing a user with a visual cue of the temperature near the heat source on the aerosol generating article. Furthermore, the use of a thermochromatic pigment or material may provide a simple visual indication of when the aerosol generating article has reached a temperature that is low enough to be disposed of without additional precautionary measures.
  • the tubular element may comprise a heat reactive material that is arranged to deform in response to heat from the combustible heat source when the combustible heat source is received in the recess such that the tubular element fits tightly against the combustible heat source to reduce the air supply to the combustible heat source.
  • Such an arrangement may enable the tubular element to form a seal, or partial seal, around the combustible heat source. This may reduce, even further, the time taken for the heat source to become extinguished.
  • the heat reactive material may act as an improved thermal barrier between the heat source and an external surface of the aerosol generating article to reduce the temperature of the external surface relative to embodiments in which no heat reactive material is present.
  • the heat reactive material may comprise an intumescent material.
  • the term 'intumescent material' is used to describe a material that expands upon exposure to elevated temperatures, other than only as a result of its coefficient of thermal expansion.
  • the intumescent material may comprise any suitable material or materials.
  • the intumescent material forms an insulating foam when exposed to heat from the combustible heat source of the aerosol generating article.
  • the intumescent material comprises a carbon source, such as starch or one or more pentaerythritols (or other types of polyalcohol), an acid source, such as ammonium polyphosphate, a blowing agent such as melamine, and a binder, such as soy lecithin.
  • the intumescent material comprises a mixture of sodium silicate and graphite such that a hard char foam may be produced when the intumescent material is exposed to heat from the combustible heat source of the aerosol generating article.
  • the intumescent material may be applied as a heat reactive coating formed by applying one or more intumescent varnishes, paints, lacquers, or any combination thereof on an interior surface of the tubular element. For example, by brushing, rolling, dipping or spraying or by using intumescent paper or plastic-based sheet that is formed into the final shape of the tubular element by any known manufacturing processes, such as cutting, rolling and gluing systems.
  • the intumescent material is a latex solution applied by spraying.
  • the intumescent material may expand by any suitable amount when exposed to heat from the combustible heat source of the aerosol generating article. Preferably, the intumescent material expands by a factor of between about 10 and about 100 times its original dimensions when exposed to heat. Where the intumescent material is applied as a heat reactive coating on an interior surface of the tubular element, preferably the thickness of the coating is from about 10 microns to about 100 microns and increases to from about 1 mm to about 2 mm when exposed to heat from the combustible heat source of the aerosol generating article.
  • the heat reactive material may comprise a heat-shrink material.
  • heat shrink material' is used to describe a material that shrinks as a result of heat exposure.
  • the heat reactive material comprises a heat-shrink material
  • the heat-shrink material may be configured to deform the tubular element to hinder air flow to the combustible heat source.
  • the heat shrink material may be a mechanically expanded polymer layer which returns to its unexpanded dimensions as a result of heat exposure.
  • the heat shrink material may be manufactured from a thermoplastic material such as nylon, polyolefin, fluroropolymer (such as FEP, PTFE or Kynar), PVC, neoprene, silicone elastomer, Viton, or any combination thereof.
  • the heat shrink material is a fluoroplastic Kynar with a shrink temperature of about 135°C and a shrink ratio of about 2:1.
  • the fluoroplastic Kynar may be provided as a layer of the material used to form the tubular element.
  • the heat shrink material is applied as a heat reactive coating on an inner surface of the tubular element.
  • the coating may be applied by any suitable method.
  • the coating may be applied as a sheet or film which is adhered to the tubular element, for example by gluing or welding.
  • the heat reactive material may be provided along the entire length of the tubular element.
  • the heat reactive material may be provided along only part of the length of the tubular element.
  • the heat reactive material may be provided at the downstream end of the tubular element. With this arrangement, the downstream end of the tubular element may form a seal or partial seal around the combustible heat source. This may result in a layer of air being present between the tubular element and the combustible heat source, upstream of the heat reactive material to form a thermally insulating barrier.
  • the combustible heat source may reach high temperatures.
  • a heat source of an aerosol generating article may reach an average temperature of around 500 degrees Celsius and in certain cases the temperature of the heat source may reach up to about 800 degrees Celsius.
  • the tubular element may comprise thermally insulating material arranged to reduce the temperature of an external surface of the aerosol generating article when the combustible heat source is received in the recess while combusting or while hot.
  • the tubular element may comprise a barrier material to thermally isolate the combustible heat source when the combustible heat source is received in the recess while combusting or while hot.
  • Suitable thermally insulating materials have a low thermal conductivity or substantially no thermal conductivity.
  • Suitable thermally insulating materials may include, for example, cardboards, foams, polymers or ceramic materials, or other materials that have a low thermal conductivity.
  • thermally insulating material is used to describe material having a bulk thermal conductivity of less than about 50 milliwatts per metre Kelvin (mW/(m K)) at 23°C and a relative humidity of 50% as measured using the modified transient plane source (MTPS) method.
  • MTPS modified transient plane source
  • the tubular element may be formed from a suitable barrier material such as a substantially non-combustible material or a substantially flame retardant material.
  • a suitable barrier material such as a substantially non-combustible material or a substantially flame retardant material.
  • the barrier material is thermally stable in air at the highest temperature achieved by the heat source of the aerosol generating article.
  • Suitable barrier materials may, for example, include metallic materials, or ceramic materials.
  • the tubular element may comprise one or more materials that undergo a phase change when heated.
  • the tubular element may comprise one or more materials that melt and extinguish the heat source by flowing over the heat source and eliminating or restricting oxygen supply to the heat source.
  • the tubular element may comprise one or more materials that undergo an endothermic reaction or phase change and consume heat energy produced by the heat source, thereby cooling the heat source.
  • the tubular element may comprise one or more materials that decompose when brought in contact with the heat source and produce a decomposition product that extinguishes the heat source. Examples of materials that may undergo a phase change when in proximity to the heat source include, for example, certain polymers and waxes.
  • the tubular element may comprise one or more materials selected from the group consisting of barrier materials, non-combustible materials, flame retardant materials, thermally conductive materials, thermally insulating materials, foam materials, phase-changing materials, metallic materials, and ceramic materials.
  • the tubular element may comprise one or more materials selected from the group consisting of non-combustible materials, flame-retardant materials, thermally conductive materials and thermally insulating materials.
  • the tubular element may comprise a heat-reflective material which advantageously may modulate the heat radiating from the combustible heat source.
  • the term 'heat reflective material' refers to a material that has a relatively high heat reflectivity and a relatively low heat emissivity such that the material reflects a greater proportion of incident radiation from its surface than it emits.
  • the material reflects more than 50% of incident radiation, more preferably more than 70% of incident radiation and most preferably more than 75% of incident radiation.
  • the tubular element may be formed from a composite material, such as a material comprising a plurality of layers.
  • the layers of the composite material for the tubular element may be formed from two or more of the materials described herein.
  • the tubular element may be formed from material comprising an external insulating layer, a second layer of intumescent or heat reactive material, and an internal layer of non-combustible material.
  • the tubular element may reduce the emission of undesirable odours when the combustible heat source is received in the recess.
  • the tubular element may reduce the emission of odours by comprising a material which absorbs or adsorbs the odours.
  • the tubular element may comprise a heat-released flavour compound.
  • the flavour compound may be a nanoparticle formed from a low melting point wax encapsulating the flavour compound.
  • the flavour compound is preferably volatile such that it is released into the atmosphere on activation of the nanoparticle.
  • the tubular element may be tapered.
  • the tubular element may be substantially cylindrical in shape.
  • the tubular element may have any suitable cross-sectional shape, for example, circular, oval, or polygonal.
  • the region of weakness is a region at which the aerosol generating article is easily broken in order to separate the first and second sections.
  • the region of weakness may be formed by a region of weakness in one or more internal components of the aerosol generating article.
  • the region of weakness may be formed by a local reduction in thickness of one or more internal components of the aerosol generating article.
  • the region of weakness may be formed by a join between two or more internal components of the aerosol generating article.
  • the region of weakness may be an area of weakness.
  • the region of weakness is a line of weakness along which the first and second sections are separable.
  • the aerosol generating article preferably comprises a wrapper that circumscribes at least a portion of the first section and at least a portion of the second section.
  • the wrapper enables the first and second sections to be integrally connected during manufacture.
  • the region of weakness may comprise a weakness formation provided in the wrapper.
  • the weakness formation may comprise a local reduction in thickness of the wrapper.
  • the weakness formation may comprise one or more ablated regions or lines, one or more scored lines, or a combination thereof.
  • the weakness formation may comprise a section of different, weaker, wrapper material.
  • the weakness formation may comprise a plurality of perforations in the wrapper. The plurality of perforations may extend around at least a portion of the aerosol generating article. The plurality of perforations may circumscribe the aerosol generating article.
  • the wrapper may be affixed to the first section and to the second section, remote from the region of weakness. By affixing the wrapper remote from the region of weakness, the wrapper may be more easily broken at the region of weakness when the user wants to separate the first and second sections.
  • the wrapper is preferably affixed to the first and second sections using glue.
  • the glue may be provided in a line extending from, or adjacent to, the distal end of the aerosol generating article towards the mouth end of the aerosol generating article.
  • the line of glue may be interrupted adjacent to, or at, the line of weakness.
  • the wrapper may be a cigarette paper.
  • a cigarette paper may be any suitable material for wrapping components of an aerosol generating article in the form of a rod.
  • the cigarette paper may circumscribe the component elements of the aerosol generating article such that the paper grips the component elements of the aerosol generating article when the article is assembled and hold them in position within the rod. Suitable materials are well known in the art.
  • the region of weakness and thus the location at which the aerosol generating article is separable into discrete first and second sections, may be provided at any suitable distance along the aerosol generating article.
  • the region of weakness is located at least 10 mm from either end of the aerosol generating article. More preferably, the region of weakness is located at least 20 mm from either end of the aerosol generating article. This arrangement allows the user to separate the first and second sections and place the tubular element over the heat source without having to hold either the first or second sections at a position particularly close to the combustible heat source, reducing the risk of the user being exposed to high surface temperatures near the heat source, or to soiling from the combustible heat source.
  • the region of weakness is located from about 10% to about 90% along the length of the aerosol generating article, where 0% refers to the upstream end and 100% refers to the upstream end, or mouth end, of the aerosol generating article.
  • the region of weakness may be located from about 20% to about 80% along the length of the aerosol generating article, from about about 30% to about 70% along the length of the aerosol generating article, or from about 40% to about 60% along the length of the aerosol generating article. In one particular embodiment, the region of weakness is located at about 50% along the length of the aerosol generating article.
  • Aerosol-generating articles according to the present invention comprise a first section having a combustible heat source and an aerosol forming substrate.
  • the aerosol-generating articles may comprise a plurality of elements assembled in the form of a rod.
  • aerosol-generating article' is used to denote an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol.
  • An aerosol-generating article may be a non-combustible aerosol- generating article, which is an article that releases volatile compounds without the combustion of the aerosol-forming substrate.
  • An aerosol-generating article may be a heated aerosol- generating article, which is an aerosol-generating article comprising an aerosol-forming substrate that is intended to be heated rather than combusted in order to release volatile compounds that can form an aerosol.
  • a heated aerosol-generating article may comprise an onboard heating means forming part of the aerosol-generating article, or may be configured to interact with an external heater forming part of a separate aerosol-generating device
  • An aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user's lungs through the user's mouth.
  • An aerosol-generating article may resemble a conventional smoking article, such as a cigarette.
  • An aerosol-generating article may comprise tobacco.
  • An aerosol-generating article may be disposable.
  • An aerosol-generating article may be partially-reusable and comprise a replenishable or replaceable aerosol-forming substrate.
  • the combustible heat source is preferably a solid heat source, and may comprise any suitable combustible fuel including, but not limited to, carbon and carbon-based materials containing aluminium, magnesium, one or more carbides, one or more nitrides and combinations thereof.
  • Solid combustible heat sources for heated smoking articles and methods for producing such heat sources are known in the art and described in, for example, US-A-5,040,552 and US-A-5,595,577 .
  • known solid combustible heat sources for heated smoking articles are carbon-based, that is they comprise carbon as a primary combustible material.
  • the combustible heat source may be a combustible carbonaceous heat source.
  • the combustible heat source is preferably a blind combustible heat source.
  • the term 'blind' describes a heat source that does not comprise any air flow channels extending from the front end face to the rear end face of the combustible heat source.
  • the term 'blind' is also used to describe a combustible heat source including one or more airflow channels extending from the front end face of the combustible heat source to the rear end face of the combustible heat source, wherein a combustible substantially air impermeable barrier between the rear end face of the combustible heat source and the aerosol-forming substrate barrier prevents air from being drawn along the length of the combustible heat source through the one or more airflow channels.
  • the inclusion of one or more closed air passageways increases the surface area of the blind combustible heat source that is exposed to oxygen from the air and may advantageously facilitate ignition and sustained combustion of the blind combustible heat source.
  • Aerosol generating articles according to the invention comprising blind combustible heat sources comprise one or more air inlets downstream of the rear end face of the combustible heat source for drawing air into one or more airflow pathways through the aerosol generating article.
  • Aerosol generating articles according to the invention comprising non-blind combustible heat sources may also comprise one or more air inlets downstream of the rear end face of the combustible heat source for drawing air into one or more airflow pathways through the aerosol generating article.
  • aerosol generating articles according to the invention comprising blind combustible heat sources comprise one or more air inlets located proximate to the downstream end of the aerosol-forming substrate.
  • air drawn along the one or more airflow pathways of aerosol generating articles according to the invention comprising a blind combustible heat source does not pass through any airflow channels along the blind combustible heat source.
  • the lack of any airflow channels through the blind combustible heat source advantageously substantially prevents or inhibits activation of combustion of the blind combustible heat source during puffing by a user. This substantially prevents or inhibits spikes in the temperature of the aerosol-forming substrate during puffing by a user.
  • combustion or pyrolysis of the aerosol-forming substrate under intense puffing regimes may be advantageously avoided.
  • the impact of a user's puffing regime on the composition of the mainstream aerosol may be advantageously minimised or reduced.
  • a blind combustible heat source may also advantageously substantially prevent or inhibit combustion and decomposition products and other materials formed during ignition and combustion of the blind combustible heat source from entering air drawn through aerosol generating articles according to the invention during use thereof. This is particularly advantageous where the blind combustible heat source comprises one or more additives to aid ignition or combustion of the blind combustible heat source.
  • heat transfer from the blind combustible heat source to the aerosol-forming substrate occurs primarily by conduction. Heating of the aerosol-forming substrate by forced convection is minimised or reduced. This may advantageously help to minimise or reduce the impact of a user's puffing regime on the composition of the mainstream aerosol of articles according to the invention.
  • aerosol generating articles according to the invention comprising a blind combustible heat source
  • the inclusion of one or more heat-conducting elements around at least a rear portion of the combustible carbonaceous heat source and at least a front portion of the aerosol-forming substrate is particularly preferred in aerosol generating articles according to the invention including blind heat sources, where there is little if any heating of the aerosol-forming substrate by forced convection.
  • the combustible heat source comprises at least one longitudinal airflow channel, which provides one or more airflow pathways through the heat source.
  • airflow channel is used herein to describe a channel extending along the length of the heat source through which air may be drawn through the aerosol generating article.
  • heat sources including one or more longitudinal airflow channels are referred to herein as “non-blind" heat sources.
  • the diameter of the at least one longitudinal airflow channel may be between about 1.5 mm and about 3 mm, more preferably between about 2 mm and about 2.5 mm.
  • the inner surface of the at least one longitudinal airflow channel may be partially or entirely coated, as described in more detail in WO-A-2009/022232 .
  • the heat source will be a volume of tobacco.
  • aerosol-forming substrate is used to describe a substrate capable of releasing upon heating volatile compounds, which can form an aerosol.
  • the aerosols generated from aerosol-forming substrates of aerosol generating articles according to the invention may be visible or invisible and may include vapours (for example, fine particles of substances, which are in a gaseous state, that are ordinarily liquid or solid at room temperature) as well as gases and liquid droplets of condensed vapours.
  • the aerosol-forming substrate may be a solid aerosol-forming substrate.
  • the aerosol-forming substrate may comprise both solid and liquid components.
  • the aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds, which are released from the substrate upon heating.
  • the aerosol-forming substrate may comprise a non-tobacco material.
  • the aerosol-forming substrate may further comprise one or more aerosol formers. Examples of suitable aerosol formers include, but are not limited to, glycerine and propylene glycol.
  • the aerosol-forming substrate may be a rod comprising a tobacco-containing material.
  • the solid aerosol-forming substrate may comprise, for example, one or more of: powder, granules, pellets, shreds, spaghetti strands, strips or sheets containing one or more of: herb leaf, tobacco leaf, fragments of tobacco ribs, reconstituted tobacco, homogenised tobacco, extruded tobacco and expanded tobacco.
  • the solid aerosol-forming substrate may be in loose form, or may be provided in a suitable container or cartridge.
  • the aerosol-forming material of the solid aerosol-forming substrate may be contained within a paper or other wrapper and have the form of a plug. Where an aerosol-forming substrate is in the form of a plug, the entire plug including any wrapper is considered to be the aerosol-forming substrate.
  • the solid aerosol-forming substrate may contain additional tobacco or non-tobacco volatile flavour compounds, to be released upon heating of the solid aerosol-forming substrate.
  • the solid aerosol-forming substrate may also contain capsules that, for example, include the additional tobacco or non-tobacco volatile flavour compounds and such capsules may melt during heating of the solid aerosol-forming substrate.
  • the solid aerosol-forming substrate may be provided on or embedded in a thermally stable carrier.
  • the carrier may take the form of powder, granules, pellets, shreds, spaghetti strands, strips or sheets.
  • the solid aerosol-forming substrate may be deposited on the surface of the carrier in the form of, for example, a sheet, foam, gel or slurry.
  • the solid aerosol-forming substrate may be deposited on the entire surface of the carrier, or alternatively, may be deposited in a pattern in order to provide a non-uniform flavour delivery during use.
  • the aerosol-forming substrate may be in the form of a plug or segment comprising a material capable of emitting volatile compounds in response to heating circumscribed by a paper or other wrapper. Where an aerosol-forming substrate is in the form of such a plug or segment, the entire plug or segment including any wrapper is considered to be the aerosol-forming substrate.
  • the aerosol-forming substrate preferably has a length of between about 5 mm and about 20 mm. In certain embodiments, the aerosol-forming substrate may have a length of between about 6 mm and about 15 mm or a length of between about 7 mm and about 12 mm.
  • the aerosol-forming substrate may comprise a plug of tobacco-based material wrapped in a plug wrap.
  • the aerosol-forming substrate comprises a plug of homogenised tobacco-based material wrapped in a plug wrap.
  • the combustible heat source and the aerosol-forming substrate may be in abutting coaxial alignment.
  • the terms “abutting” and “abut” are used to describe a component, or a portion of a component, being in direct contact with another component, or portion of a component.
  • Aerosol generating articles according to the invention may comprise a heat-conducting element around and in direct contact with both at least a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate.
  • the heat-conducting element provides a thermal link between the combustible heat source and the aerosol-forming substrate of aerosol generating articles according to the invention and advantageously helps to facilitate adequate heat transfer from the combustible heat source to the aerosol-forming substrate to provide an acceptable aerosol.
  • aerosol generating articles according to the invention may comprise a heat-conducting element spaced apart from one or both of the combustible heat source and the aerosol-forming substrate, such that there is no direct contact between the heat-conducting element and one or both of the combustible heat source and the aerosol-forming substrate.
  • the heat-conducting element may be formed by the wrapper.
  • the wrapper may comprise one or more layers of heat conductive material which form the one or more heat-conducting elements.
  • the one or more heat-conducting elements are preferably non-combustible.
  • the one or more heat-conducting elements may be oxygen restricting.
  • the one or more heat-conducting elements may inhibit or resist the passage of oxygen through the heat-conducting element.
  • Suitable heat-conducting elements include, but are not limited to: metal foil wrappers such as, for example, aluminium foil wrappers, steel wrappers, iron foil wrappers and copper foil wrappers; and metal alloy foil wrappers.
  • Aerosol generating articles according to the invention may comprise a transfer element, or spacer element, downstream of the aerosol-forming substrate.
  • a transfer element or spacer element, downstream of the aerosol-forming substrate.
  • Such an element may take the form of a hollow tube that is located downstream of an aerosol-forming substrate.
  • the transfer element may abut one or both of the aerosol-forming substrate and a mouthpiece. Alternatively, the transfer element may be spaced apart from one or both of the aerosol-forming substrate and the mouthpiece.
  • a transfer element advantageously allows cooling of the aerosol generated by heat transfer from the combustible heat source to the aerosol forming substrate.
  • the inclusion of a transfer element also advantageously allows the overall length of the aerosol generating article to be adjusted to a desired value, for example to a length similar to that of a conventional cigarette, through an appropriate choice of the length of the transfer element.
  • the transfer element may have a length of between about 7 mm and about 50 mm, for example a length of between about 10 mm and about 45 mm or of between about 15 mm and about 30 mm.
  • the transfer element may have other lengths depending upon the desired overall length of the aerosol generating article, and the presence and length of other components within the aerosol generating article.
  • transfer element refers to an element which comprises at least one open-ended tubular hollow body.
  • the transfer element provides a hollow body defining part of the airflow pathway through the article.
  • the aerosol-generating article comprises a transfer element
  • air drawn into the aerosol generating article passes through the at least one open-ended tubular hollow body of the transfer element as it passes downstream through the aerosol generating article from the aerosol-forming substrate to the distal end of the aerosol generating article.
  • the transfer element may comprise at least one open-ended tubular hollow body formed from one or more suitable materials that are substantially thermally stable at the temperature of the aerosol generated by the transfer of heat from the combustible carbonaceous heat source to the aerosol-forming substrate.
  • suitable materials are known in the art and include, but are not limited to, paper, cardboard, plastics, such a cellulose acetate, ceramics and combinations thereof.
  • the transfer element may comprise the tubular element.
  • the transfer element may be formed by the tubular element.
  • Aerosol generating articles according to the invention may comprise an aerosol-cooling element or heat exchanger downstream of the aerosol-forming substrate.
  • the aerosol-cooling element may comprise a plurality of longitudinally extending channels.
  • the aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of metallic foil, polymeric material, and substantially non-porous paper or cardboard.
  • the aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminium foil.
  • the aerosol-cooling element may comprise a gathered sheet of biodegradable polymeric material, such as polylactic acid (PLA) or a grade of Mater-Bi® (a commercially available family of starch based copolyesters).
  • PLA polylactic acid
  • Mater-Bi® a commercially available family of starch based copolyesters
  • the aerosol generating article comprises a mouthpiece downstream of the aerosol-forming substrate and positioned at the downstream end of the aerosol generating article.
  • the mouthpiece may form part of the first section or the second section.
  • the mouthpiece may be provided as a separate component, or as part of a third section that is integrally connected to the first or second sections, either directly or via one or more intermediate components.
  • the mouthpiece may comprise a filter.
  • the mouthpiece may comprise a filter plug having one or more segments.
  • the filter plug is a single segment filter plug.
  • the filter plug may comprise one or more segments comprising cellulose acetate, paper or other suitable known filtration materials, or combinations thereof.
  • the filter plug comprises filtration material of low filtration efficiency.
  • the aerosol generating article may be substantially cylindrical in shape.
  • the aerosol generating article may be substantially elongate.
  • the aerosol generating article has a length and a circumference substantially perpendicular to the length.
  • the aerosol-forming substrate may be substantially cylindrical in shape.
  • the aerosol-forming substrate may be substantially elongate.
  • the aerosol-forming substrate also has a length and a circumference substantially perpendicular to the length.
  • the aerosol-forming substrate may be located in the aerosol generating article such that the length of the aerosol-forming substrate is substantially parallel to the airflow direction in the aerosol generating article.
  • the transfer section or element may be substantially elongate.
  • the aerosol generating article may have any desired length.
  • the aerosol generating article may have a total length of between approximately 65 mm and approximately 100 mm.
  • the aerosol generating article may have any desired external diameter.
  • the aerosol generating article may have an external diameter of between approximately 5 mm and approximately 12 mm.
  • the aerosol generating article may be circumscribed by an outer wrapper of, for example, cigarette paper, which has low air permeability.
  • the mouthpiece may be circumscribed by tipping paper.
  • the smoking article 100 according to the first embodiment of the invention shown in Figure 1 comprises a blind combustible carbonaceous heat source 102, an aerosol-forming substrate 104, an airflow directing element 106, an aerosol-cooling element 108, and a mouthpiece 110 in abutting coaxial alignment.
  • the combustible carbonaceous heat source 102, aerosol-forming substrate 104 and airflow directing element 106 are overwrapped in a first outer wrapper 112 of cigarette paper of low air permeability, forming a first section 114 of the smoking article 100.
  • the aerosol-cooling element 108 and mouthpiece 110 are overwrapped in a second outer wrapper 116 of cigarette paper of low air permeability, forming a second section 118 of the smoking article 100.
  • the first section 114 is thus upstream of the second section 118.
  • the smoking article 100 further includes a band of tipping paper 120 circumscribing at least a downstream portion of the first section 114 and at least an upstream portion of the second section 118.
  • the first section 114 and the second section 118 are integrally connected by the tipping paper 120 along a first line of weakness 122 which comprises a plurality of perforations that circumscribe the smoking article 100.
  • the first line of weakness 122 defines a weakness formation in the tipping paper 120.
  • a removable cap 124 is provided at the distal end of the smoking article 100, and is directly adjacent to the heat source 102.
  • the removable cap 124 comprises a central portion 126, and is wrapped in a portion 128 of the first outer wrapper 112.
  • the central portion 126 comprises a desiccant, such as glycerine, provided to preferentially absorb moisture as compared to the heat source.
  • the portion 128 of the first outer wrapper is connected to the rest of the first outer wrapper 112 along a second line of weakness 130.
  • the line of weakness 130 comprises a plurality of perforations in the first outer wrapper 112 that circumscribe the smoking article 100.
  • the aerosol-forming substrate 104 is located immediately downstream of the combustible carbonaceous heat source 102 and comprises a cylindrical plug 132 of tobacco material, comprising glycerine as an aerosol former, that is circumscribed by plug wrap 134.
  • a non-combustible, substantially air impermeable barrier 136 is provided between the downstream end of the combustible heat source 102 and the upstream end of the aerosol-forming substrate 104.
  • the non-combustible, substantially air impermeable barrier consists of a non-combustible, substantially air impermeable, barrier coating 136, which is provided on the entire rear face of the combustible carbonaceous heat source 102.
  • a heat conducting element (not shown) consisting of a tubular layer of aluminium foil surrounds and is in direct contact with a rear portion of the combustible carbonaceous heat source 102 and an abutting front portion of the aerosol-forming substrate 104.
  • the airflow directing element 106 is located downstream of the aerosol-forming substrate 104 and comprises an open-ended, substantially air impermeable hollow tube 138 made of, for example, cardboard, which is of reduced diameter compared to the aerosol-forming substrate 104.
  • the upstream end of the open-ended hollow tube 138 abuts the aerosol-forming substrate 104.
  • the open-ended hollow tube 138 is circumscribed by an annular air permeable diffuser 140 made of, for example, cellulose acetate tow, which is of substantially the same diameter as the aerosol-forming substrate 104.
  • the open-ended hollow tube 138, and annular air permeable diffuser 140 may be separate components that are adhered or otherwise connected together to form the airflow directing element 106 prior to assembly of the smoking article 100.
  • the open-ended hollow tube 138 and annular air permeable diffuser 140 may be parts of a single component.
  • the open-ended hollow tube and annular air permeable diffuser may be parts of a single hollow tube of air permeable material having a substantially air impermeable coating applied to its inner surface.
  • the central portion 116 of the removable cap 114 is manufactured from the same material as the airflow directing element, and so comprises an open-ended substantially air impermeable hollow tube circumscribed by an annular air permeable diffuser.
  • a circumferential arrangement of air inlets 142 is provided in the first outer wrapper 112 circumscribing the first section 114 in the region of the airflow directing element 106.
  • the aerosol-cooling element 108 is located immediately downstream of the airflow directing element 106 and comprises a gathered sheet of biodegradable polymeric material, such as, for example, polylactic acid.
  • the mouthpiece 110 of the smoking article 100 is located immediately downstream of the aerosol-cooling element 108 and comprises a filter segment 144, having a cylindrical plug 146 of suitable filtration material such as, for example, cellulose acetate tow of very low filtration efficiency circumscribed by filter plug wrap 148, and a tubular element 150 immediately downstream of the filter segment 144.
  • the tubular element 150 comprises a cylindrical tube of suitable, substantially rigid material such as, for example cardboard, stiff paper or heat resistant rigid plastic.
  • the tubular element 150 defines a recess 152 at the mouth end of the smoking article 100.
  • the mouthpiece 110 thus has a mouth end cavity formed by the recess 152.
  • the user removes the removable cap 124 by transversely compressing the cap by pinching it between thumb and finger. By compressing the cap 124, sufficient force is provided to the second line of weakness 130 to locally break the first outer wrapper 112. The user then removes the cap 124 by twisting the cap to break the remaining portion of the second line of weakness 130. When the cap 124 is removed the heat source 102 is partially exposed which enables the user to light the smoking article 100.
  • the user ignites the combustible heat source 102 which heats the aerosol-forming substrate 104 to produce an aerosol.
  • air is drawn through the air inlets 142, through the aerosol-forming substrate 104, airflow directing element 106, aerosol-cooling element 108, and mouthpiece 110, as indicated by the arrows in Figure 1 , and into the user's mouth.
  • the user breaks the smoking article in two by breaking the tipping paper 120 along the first line of weakness 122 to separate the first section 114 and the second section 118 across separation plane 1000. The user then places the downstream end of the second section 118 over the upstream end of the first section 114 so that the combustible heat source 102 is received in the recess 152 of the tubular element 150, as shown in Figure 2 .
  • the tubular element 150 is a frictional fit over the combustible heat source 102, such that it is retained over the combustible heat source 102 and the first and second sections 114, 118 are held together.
  • the tubular element 150 which may be made from any suitable material, such as flame-retardant material, sufficiently restricts the supply of oxygen to the combustible heat source so that the heat source extinguishes, and thus cools down. In this way, the user is provided with a simple and self-contained means of extinguishing the combustible heat source after use of the smoking article.
  • the tubular element may be provided with a fragrance that may be evolved when the tubular element is heated by the combustible heat source.
  • the fragrance may be released into the atmosphere and may act to mask any unpleasant odours released by the heat source as it is being extinguished.
  • the fragrance may provide an air freshening effect by emitting pleasant odours and fragrances.
  • the fragrance is sufficiently volatile that it swiftly evaporates after the tubular element is placed over the combustible heat source.
  • the fragrance may include one or more fragrance ingredient selected from the list consisting of Amyl Cinnamal, Amylcinnamyl Alcohol, Benzyl Alcohol, Benzyl Salicylate, Cinnamyl Alcohol, Cinnamal, Citral, Coumarin, Eugenol, Geraniol, Hydroxycitronellal, Hyroxymethylpentylcyclohexenecarboxaldehyde, Isoeugenol, Anisyl Alcohol, Benzyl Benzoate, Benyl Cinnamate, Citronellol, Farnesol, Hexyl Cinnamaldehyde 2-methyl-3-(4-tert-butylbenzyl)propionaldehyde, d-Limonene, Linalool, Methyl heptine carbonate, and 3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-buten-2-one.
  • FIGS 3 and 4 show a second embodiment of a smoking article 300.
  • the smoking article 300 is of similar construction to the first embodiment of smoking article 100 shown in Figures 1 and 2 , and where the same features are present, like reference numerals have been used.
  • the tubular element 350 of smoking article 300 of the second embodiment is located immediately upstream of the aerosol-cooling element 308 and is at the upstream end of the second section 318, rather than at the downstream end of the second section.
  • the recess 352 defined by the tubular element 350 forms a transfer element, or spacer element, between the airflow directing element 306 and the aerosol-cooling element 308.
  • the mouthpiece 310 and mouth end of the smoking article 300 are formed by the filter segment 344.
  • the user removes the removable cap 324, in the same way as described with reference to Figures 1 and 2 , to partially expose the combustible heat source 302 which enables the user to light the smoking article 300.
  • the user ignites the combustible heat source 302 which heats the aerosol-forming substrate 304 to produce an aerosol.
  • air is drawn through the air inlets 342, through the aerosol-forming substrate 304, airflow directing element 306, tubular element 346, aerosol-cooling element 308, and mouthpiece 310, as indicated by the arrows in Figure 3 , and into the user's mouth.
  • the user breaks the smoking article in two by breaking the tipping paper 320 along the first line of weakness 322 to separate the first section 314 and the second section 318 across separation plane 3000. The user then places the upstream end of the second section 318 over the upstream end of the first section 314 so that the combustible heat source 302 is received in the recess 352 of the tubular element 350, as shown in Figure 4 .
  • the tubular element 350 is a frictional fit over the combustible heat source 302, such that it is retained over the combustible heat source 302 to sufficiently restrict the supply of oxygen to the combustible heat source so that the heat source extinguishes, and thus cools down.
  • the recess 352 defined by the tubular element 350 preferably has a length greater than that of the exposed portion of the heat source 302 received in the recess 352.
  • the tubular element 350 may comprise a thermally insulating material to reduce the heat transfer from the heat source 302 to the aerosol-cooling element 308 during extinguishing.
  • Figures 5 and 6 show a third embodiment of smoking article 500 which is included for background interest only.
  • the smoking article 500 is similar to the first and second embodiments of smoking article 100, 300 shown in Figures 1 to 4 , and where the same features are present, like reference numerals have been used.
  • the first section 514 is downstream of the second section 518 and comprises comprises a blind combustible carbonaceous heat source 502, an aerosol-forming substrate 504, an airflow directing element 506, an aerosol-cooling element 508, a transfer element 509 and a mouthpiece 510 in abutting coaxial alignment.
  • the mouthpiece 510 and mouth end of the smoking article 500 are formed by filter segment 544.
  • the combustible carbonaceous heat source 502, aerosol-forming substrate 504 and airflow directing element 506 are overwrapped in a first outer wrapper 512 of cigarette paper of low air permeability, forming a first part of the first section 514.
  • the aerosol-cooling element 508, transfer element 509 and mouthpiece 510 are overwrapped in a second outer wrapper 516 of cigarette paper of low air permeability, forming a second part of the first section 514.
  • the first section 514 further includes a band of tipping paper 520 circumscribing at least a downstream portion of the first outer wrapper 512 and at least an upstream portion of the second outer wrapper 516 to hold the two parts of the first section 514 together.
  • smoking article 500 also includes a removable cap 524 at the distal end of the smoking article 500 and directly adjacent to the heat source 502.
  • the removable cap 124 comprises a central portion 526, and is wrapped in a portion 528 of the first outer wrapper 512.
  • the portion 528 of the first outer wrapper which circumscribes the cap 524 is connected to the rest of the first outer wrapper 512 along a line of weakness 522.
  • the line of weakness 522 comprises a plurality of perforations in the first outer wrapper 512 that circumscribe the smoking article 500.
  • the line of weakness 522 defines a weakness formation in the first outer wrapper 512.
  • the tubular element 550 is provided as part of the cap 524, forming the second section 514 of the smoking article 500.
  • the tubular element 550 circumscribes the central portion 526 of the cap 524 and at least part of the length of the heat source 502. In this manner, the heat source 502 is received in the recess 552 defined by the tubular element 550 prior to use of the smoking article.
  • the portion 528 of the first outer wrapper 512 which circumscribes the cap also circumscribes the tubular element 550 and integrally connects the first section 514 and the second section 518.
  • the user separates the first and second sections 514, 518 across separation plane 5000 by twisting the cap 524 and the tubular element 550 to break the first outer wrapper 512 along the line of weakness 522 and separate the first portion 528 of wrapper from the rest of the first outer wrapper 512.
  • the heat source 502 is partially exposed enabling the user to light the smoking article 500.
  • the user ignites the combustible heat source 502 which heats the aerosol-forming substrate 504 to produce an aerosol.
  • air is drawn through the air inlets 542, through the aerosol-forming substrate 504, airflow directing element 506, aerosol-cooling element 508, transfer element 509 and mouthpiece 510, as indicated by the arrows in Figure 6 , and into the user's mouth.
  • the user After use of the smoking article 500, the user returns the second section 518 to its initial position at the upstream end of the first section 514 so that the combustible heat source 502 is received in the recess 552 of the tubular element 550.
  • the tubular element 550 In this position, the tubular element 550 is a frictional fit over the combustible heat source 502 and sufficiently restricts the supply of oxygen to the combustible heat source so that the heat source extinguishes, and thus cools down.
  • the tubular element may comprise an intumescent material, or heat-shrink material which reacts to the heat of the combustible heat source to further restrict the supply of oxygen to the heat source when the smoking article is in the extinguishing configuration.
  • the intumescent or heat-shrink material may also at least partially close the open end of the tubular element to further restrict the supply of oxygen to the heat source.
  • the at least partially closed end of the tubular element may provide a physical barrier between the heat source and any external materials.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Medicinal Preparation (AREA)

Claims (12)

  1. Article de génération d'aérosol (100 ; 300) comprenant :
    une première section (114 ; 314) ayant une source de chaleur combustible (102 ; 302) et un substrat formant aérosol (104 ; 304) ; et
    une deuxième section (118 ; 318) ayant un élément tubulaire (150 ; 350) définissant un évidement (152 ; 352) à une extrémité de la deuxième section (118 ; 318),
    dans lequel les première et deuxième sections (114,118 ; 314,318) sont solidairement connectées à une région de faiblesse (122 ; 322), la première section (114 ; 314) et la deuxième section (118 ; 318) pouvant être séparées dans la région de faiblesse pour permettre de placer l'élément tubulaire (150 ; 350) sur la source de chaleur combustible (102 ; 302), de sorte que la source de chaleur combustible (102 ; 302) soit au moins partiellement reçue dans l'évidement (152 ; 352),
    dans lequel la première section (114 ; 314) est en amont de la deuxième section (118 ; 318) lorsque les première et deuxième sections (114,118 ; 314,318) sont solidairement connectées à la région de faiblesse,
    dans lequel l'élément tubulaire (150 ; 350) est au moins partiellement ouvert aux deux de ses extrémités de sorte que, pendant l'utilisation de l'article de génération d'aérosol (100 ; 300), l'air peut être aspiré le long de l'article de génération d'aérosol (100 ; 300) par l'élément tubulaire (150 ; 350), et
    dans lequel l'élément tubulaire (150) est à l'extrémité en aval de la deuxième section (118), de sorte que l'évidement (152) forme une cavité d'extrémité buccale de l'article de génération d'aérosol (100) lorsque les première et deuxième sections (114, 118) sont totalement connectées, ou l'élément tubulaire (350) est à l'extrémité en amont de la deuxième section (318) et forme un élément de transfert de l'article de génération d'aérosol (300) lorsque les première et deuxième sections (314,318) sont solidairement connectées.
  2. Article de génération d'aérosol (100 ; 300) selon la revendication 1, dans lequel l'élément tubulaire (150 ; 350) est disposé de sorte que, lorsque la source de chaleur combustible (102 ; 302) est reçue dans l'évidement (152 ; 352), l'élément tubulaire (150 ; 350) s'étend le long de substantiellement toute la longueur de la source de chaleur combustible (102 ; 302).
  3. Article de génération d'aérosol (100 ; 300) selon l'une quelconque des revendications précédentes, dans lequel l'élément tubulaire (150 ; 350) est disposé de sorte que, lorsque la source de chaleur combustible (102 ; 302) est enflammée et reçue dans l'évidement (152 ; 352), l'élément tubulaire limite suffisamment l'alimentation d'air à la source de chaleur combustible (102 ; 302) de sorte que la source de chaleur combustible (102 ; 302) soit éteinte par l'élément tubulaire (150 ; 350).
  4. Article de génération d'aérosol (100 ; 300) selon la revendication 3, dans lequel l'élément tubulaire (150 ; 350) est dimensionné de sorte que, lorsque la source de chaleur combustible (102 ; 302) est reçue dans l'évidement (152 ; 352), il y a un ajustement à friction entre la surface intérieure de l'élément tubulaire (150 ; 350) et la surface extérieure de la source de chaleur combustible (102 ; 302).
  5. Article de génération d'aérosol (100 ; 300) selon l'une quelconque des revendications précédentes, dans lequel une surface intérieure de l'élément tubulaire (150 ; 350) comprend un matériau non combustible et dans lequel, de préférence, le matériau non combustible est au moins l'un des suivants : un métal ; un oxyde métallique ; une céramique ; et une pierre.
  6. Article de génération d'aérosol (100 ; 300) selon l'une quelconque des revendications précédentes, dans lequel l'élément tubulaire (150 ; 350) comprend un matériau thermoréactif disposé pour se déformer en réponse à la chaleur provenant de la source de chaleur combustible (102 ; 302), lorsque la source de chaleur combustible (102 ; 302) est reçue dans l'évidement (152 ; 352) de sorte que l'élément tubulaire (150 ; 350) s'ajuste de manière étanche à la source de chaleur combustible (102 ; 302) pour limiter l'alimentation en air vers la source de chaleur combustible (102 ; 302).
  7. Article de génération d'aérosol (100 ; 300) selon la revendication 6, dans lequel le matériau thermoréactif comprend un matériau intumescent.
  8. Article de génération d'aérosol (100 ; 300) selon la revendication 6, dans lequel le matériau thermoréactif comprend un matériau thermorétractable.
  9. Article de génération d'aérosol (100 ; 300) selon l'une quelconque des revendications précédentes, dans lequel la région de faiblesse (122 ; 322) est une ligne de faiblesse.
  10. Article de génération d'aérosol (100 ; 300) selon l'une quelconque des revendications précédentes, dans lequel les première et deuxième sections (114, 118 ; 314, 318) sont entourées par une enveloppe (120 ; 320) et dans lequel la région de faiblesse (122 ; 322) comprend une formation de faiblesse fournie dans l'enveloppe (120 ; 320).
  11. Article de génération d'aérosol (100 ; 300) selon la revendication 10, dans lequel la formation de faiblesse comprend une pluralité de perforations dans l'enveloppe (120 ; 320), la pluralité de perforations entourant l'article de génération d'aérosol (100 ; 300).
  12. Article de génération d'aérosol (100 ; 300) selon l'une quelconque des revendications précédentes, dans lequel la région de faiblesse est située à au moins environ 10 mm, de préférence à au moins environ 20 mm, de l'une ou l'autre extrémité de l'article de génération d'aérosol (100 ; 300).
EP16819320.9A 2015-12-31 2016-12-22 Article de génération d'aérosol cassable Active EP3397084B1 (fr)

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RU2719273C2 (ru) 2020-04-17
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CN108366618A (zh) 2018-08-03
RU2018127755A3 (fr) 2020-02-12
JP6918800B2 (ja) 2021-08-11
RU2018127755A (ru) 2020-02-03
MX2018007730A (es) 2018-08-15
EP3397084A1 (fr) 2018-11-07
CA3006238A1 (fr) 2017-07-06
IL259521A (en) 2018-07-31
KR20180093004A (ko) 2018-08-20
US20190014820A1 (en) 2019-01-17
JP2019505184A (ja) 2019-02-28

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