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WO2016055653A1 - Substance un composant de distribution destiné à des dispositifs d'inhalation - Google Patents

Substance un composant de distribution destiné à des dispositifs d'inhalation Download PDF

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Publication number
WO2016055653A1
WO2016055653A1 PCT/EP2015/073483 EP2015073483W WO2016055653A1 WO 2016055653 A1 WO2016055653 A1 WO 2016055653A1 EP 2015073483 W EP2015073483 W EP 2015073483W WO 2016055653 A1 WO2016055653 A1 WO 2016055653A1
Authority
WO
WIPO (PCT)
Prior art keywords
substance
delivery component
flowable
valve
shell
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.)
Ceased
Application number
PCT/EP2015/073483
Other languages
English (en)
Inventor
Rory PARSONS
Kathryn Emma MOONEY
David Mclaughlin
Mary Wilhelmina MCFARLANE
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.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Publication of WO2016055653A1 publication Critical patent/WO2016055653A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/30—Devices using two or more structurally separated inhalable precursors, e.g. using two liquid precursors in two cartridges
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/48—Fluid transfer means, e.g. pumps
    • A24F40/485—Valves; Apertures
    • 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
    • A24D3/0287—Manufacture of tobacco smoke filters for filters with special features for composite filters
    • 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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0001—Details of inhalators; Constructional features thereof
    • A61M15/0013—Details of inhalators; Constructional features thereof with inhalation check valves
    • A61M15/0015—Details of inhalators; Constructional features thereof with inhalation check valves located upstream of the dispenser, i.e. not traversed by the product

Definitions

  • This invention relates to inhaler devices, for example, smoking articles (such as cigarettes, cigars, cigarillos and the like) or aerosol generating devices (such as vaporizers, e-cigarettes and the like). More specifically, the present invention relates to a substance delivery component for inhaler devices which is configured to release one or more substances upon application of an external force.
  • Typical smoking articles comprise a rod of tobacco and a filter provided at an end of the latter through which smoke is drawn by the user of the smoking article once the free end of the tobacco rod has been lit. It is known to provide such smoking articles with one or more user-activated components embedded within the smoking article, most often placed within the filter and/or proximate to the joint between the tobacco rod and the filter.
  • the purpose of the user-activated component(s) is to allow the user to activate said components when desired to alter the smoke that passes through the filter, usually during the smoking process.
  • the component may contain an additive such as a flavourant which is released by the user to add flavour to the smoke during use of the smoking article.
  • the component may contain a fluid, for example water, capable of altering the smoking characteristics of the smoking article in a manner which does not result in addition of flavour.
  • WO-A-2006/136197 describes incorporating at least one breakable capsule into the filter. Upon crushing by the user, the capsule breaks and releases a liquid composition comprising flavouring agents.
  • aerosol generating devices such as tobacco vaporizers, heat-not-burn devices, and e-cigarettes have become popular among consumers, offering an alternative to standard smoking articles.
  • These aerosol generating devices generally comprise a reservoir containing an aerosol generating material, for example, a tobacco-based substance, composition or a liquid, a heating assembly to heat the aerosol generating material to generate a vapour therefrom to be inhaled by a user and an energy storage component such as a battery for powering the heating assembly to generate the vapour.
  • an aerosol generating material for example, a tobacco-based substance, composition or a liquid
  • a heating assembly to heat the aerosol generating material to generate a vapour therefrom to be inhaled by a user
  • an energy storage component such as a battery for powering the heating assembly to generate the vapour.
  • a substance delivery component for an inhaler device comprising a shell of deformable material defining a closed inner chamber containing at least one flowable substance, wherein the shell comprises at least one pressure activated valve for controlled delivery of substance(s) from the inner chamber upon application of external force to the shell.
  • the term "inhaler device” encompasses but is not limited to smoking articles (such as cigarettes, cigars, cigarillos and the like) and aerosol generating devices (such as vaporizers, e-cigarettes and the like).
  • the at least one flowable substance may be an aerosol generating material (for example, a tobacco-based substance, composition or a liquid) or it may be an additive substance (for example, a flavourant) or it may comprise both an aerosol generating material and an additive substance. If the flowable substance contained in the substance delivery component is or comprises an aerosol generating material, then the substance delivery component may be more suited for use in aerosol generating devices. If however the flowable substance contained in the substance delivery component is an additive substance, then the substance delivery component containing the flowable substance may be equally suited for use with either smoking articles or aerosol generating devices.
  • the substance(s) can be dispensed by the user in a more controlled manner than is possible using a conventional breakable capsule such as those used in smoking articles.
  • a conventional breakable capsule such as those used in smoking articles.
  • the valve will only permit egress of the substance while force is being applied by the user, becoming substantially closed again once the force is removed, the amount of the substance released can be controlled by the user, thereby achieve a stronger or weaker flavour as desired.
  • breakable capsules of the sort disclosed in WO-A-2006/136197 are fractured, the entire contents of the capsule will be released without any further control.
  • the direction of substance delivery can also be controlled through design and orientation of the valve(s), which itself can impact upon the strength of the substance effect (be it an additive flavour or otherwise), whereas in the known capsule designs this is not possible.
  • An additional benefit of the presently disclosed approach is that the component itself does not break when the substance is dispensed and, preferably, it returns to its original shape and size after delivery of the substance. This helps the inhaler device as a whole to retain its structure and appearance after activation of the substance delivery component.
  • the substance delivery component provides when used with either smoking articles or aerosol generating devices, it further provides the following advantages when used specifically with aerosol generating devices.
  • conventional aerosol generating devices it has not previously been possible to provide sufficient control over the amount of aerosol inhaled to a user; in contrast to the reservoir and wick arrangements of conventional aerosol generating devices, the substance delivery component allows for the amount of flowable substance leaving the substance delivery component to be controlled by the user, and thus the amount of aerosol generated and that which is inhaled by the user is also controllable by the user.
  • the flowable substance may be an aerosol generating material comprising for example a tobacco-based substance, and in this case a user can control the taste strength of tobacco-based aerosol that they inhale tailored their own preference using the substance delivery component.
  • the flowable substance may also be an additive substance which is provided on its own without the tobacco-based substance or the flowable substance may comprise an additive substance which is provided in addition to the tobacco-based substance, for example, in a mixture, or in a separate substance delivery component to the substance delivery component that contains the tobacco- based substance. This advantageously provides a user with the option to control the amount of additive substance that they inhale; when the additive substance is a flavourant in particular, the user can alter the taste of the generated aerosol on-demand while using the device.
  • the term "flowable substance” includes any materials which can be made to flow by the application of pressure, such as fluids (liquids and gases), pastes, gels, suspensions, solutions and flowable solids such as powders.
  • the flowable additive substance has a viscosity between 1 and 500,000 centipoise at 25 degrees C, more preferably between 1 and 5,000 centipoise at 25 degrees C, yet more preferably between 1 and 1000 centipoise at 20 degrees C (especially in the case of aerosol generating devices), and most preferably between 50 and 250 centipoise at 20 degrees C (especially in the case of aerosol generating devices).
  • Different embodiments of the substance delivery component will be more suitable for use with substances of different viscosity.
  • the substance(s) could also comprise shear thickening liquids (viscosity increases with shear stress), shear thinning liquids (viscosity decreases with shear stress), thixotropic liquids (viscosity decreases over time when shaken/agitated/stressed) and rheopectic liquids (viscosity increases over time when shaken/agitated/stressed).
  • Non-Newtonian liquids such as pastes and suspensions may also be used.
  • the at least one pressure activated valve can be implemented in various different ways.
  • the opening of the valve may be as a direct result of external force on the shell, or caused by an increase in pressure of the substance in the inner chamber against the valve, or a combination of the two effects.
  • the at least one pressure activated valve comprises a duckbill valve, preferably having a single slit, a triple slit or a cross slit.
  • a duckbill valve comprises a valve chamber of decreasing size in at least one dimension (the sides preferably being straight and angled towards one another), the chamber walls being redirected parallel to one another at the point where they meet to form a flange with at least one slit defined between the walls.
  • the at least one slit When the pressure of the flowable substance inside the valve chamber increases such that it is greater than the pressure outside the valve, the at least one slit is opened allowing delivery of the substance. When the pressure is released, the at least one slit returns to its original position in which it is substantially closed. If desired, the end of the flange may be folded back on itself (e.g. by 90 degrees or more) to provide extra resistance to the release of the flowable substance. This may be appropriate whether the flowable substance is of low viscosity for example.
  • the at least one pressure activated valve may comprise a membrane having at least one slit therethrough, preferably a cross slit, or a domed membrane having at least one slit therethrough, preferably a cross slit.
  • the one or more slits in the membrane are forced open allowing the egress of the additive substance(s).
  • the slit(s) become substantially closed once again due to the resilience of the membrane.
  • the component comprises multiple valves, each could be of the same type or an assortment of different valve types may be used.
  • the at least one pressure activated valve is formed integrally with the shell.
  • the shell and the at least one valve may be formed in a single injection moulding operation or other such manufacturing process.
  • the seal achieved by the valve may be sufficient by itself to prevent the inadvertent egress of the additive substance(s), e.g. during filling of the component or during packaging or handling of the smoking article.
  • a low viscosity substance such as a water-based solution.
  • the at least one pressure activated value may be further provided with a sealant substance configured to seal the valve (e.g. coated across the exit point of the valve), the sealant substance being frangible upon application of external force to the shell and/or degradable upon exposure to moisture, smoke and/or air.
  • the sealant substance could comprise an adhesive or a wax for example.
  • the shell could be irreversibly deformed upon the application of external force, e.g. undergoing plastic deformation, provided that the shell should not fracture.
  • the shell is elastically deformable and advantageously comprises elastomeric material, most preferably any of: silicone, flurosilicone, fluoroelastomer or rubber.
  • suitable materials include: EPDM, perfluorelastomer, buna rubber, butyl rubber, natural rubber, synthetic rubbers, plastics, TPC and the like.
  • Such resilient constructions are not only deemed to be more robust but, as noted above, also provide the benefit of preserving the initial shape and size of the component after use and hence maintaining the structural integrity of the inhaler device in which it is incorporated.
  • the flowable substance(s) could simply be held within the walls of the inner chamber.
  • a porous material may also be provided inside the inner chamber, which is adapted to carry the flowable substance(s) in use.
  • the porous material could comprise sponge, foam, hydrogel, fibrous wadding or matting or any other inert and fully or partially compressible solid carrier or adsorbent substance. It will be appreciated that the porous material should be compressible under the external force applied by the user, or at least collapsible, so as not to prevent operation of the substance delivery component, and should also release the substance it carries upon such compression.
  • porous material can improve the control with which the substance can be released, and also assists in retaining the substance within the inner chamber during filling, especially for low viscosity substances. If the porous material is itself elastically deformable, it may help the shell to return to its original shape and size after an external force has been removed, even if the shell material itself is not elastic.
  • the substance delivery component could be filled by injecting the flowable substance(s) into the inner chamber either through the valve(s) or through the shell of the component, e.g. using a hollow needle.
  • the action of injecting the substance(s) could itself form part of the process of manufacturing the valve, e.g. by forming a slit through a designated part of the component, to result in a valve, possibly using a flat needle.
  • the substance delivery component could further comprise a filling aperture through which the flowable substance(s) can be inserted into the inner chamber, and a sealing member, such as a membrane, configured to close the filling aperture, e.g. by heat-sealing or by adhesive.
  • the flowable substance could either be inserted into the chamber in its flowable state (e.g. poured, injected or vacuum-filled), or various steps could first be taken to simplify this filling step.
  • the substance(s) could first be solidified (e.g. frozen) to form suitable pellets which can then be placed in the chamber for subsequent thawing.
  • the substance(s) could be incorporated into capsules with a degradable or dissolvable coating which are then placed into the chamber and subsequently opened (e.g. by adding water) to release their contents into the chamber.
  • a porous material is to be provided in the chamber, this may first be immersed in the substance in order to absorb a quantity thereof, and then placed in the chamber.
  • the substance delivery component will comprise only a single valve in order to achieve unidirectional substance delivery in a preferred direction.
  • the valve will ultimately be arranged in the smoking article so as to direct the additive substance along the long axis of the smoking article either towards (or less preferably away from) the tobacco rod.
  • the valve will ultimately be arranged in the aerosol generating device so as to direct the additive substance towards the heating assembly (perhaps via a reservoir containing the aerosol generating material).
  • the component includes first and second valves arranged at approximately 180 degrees from one another so as to deliver substance(s) in substantially opposite directions from one another.
  • the first valve may ultimately be directed towards the tobacco rod and the other towards the user's mouth in the case of use in a smoking article.
  • This format may improve the distribution of the substance(s) on delivery thus providing a more balanced flavour to the user.
  • the first and second valves may be arranged at between 45 and 135 degrees from one another, preferably substantially 90 degrees, so as to deliver substance(s) in different, non-parallel directions from one another.
  • the component could be provided with three or more valves, or even a continuous slit, arranged to direct the substance(s) radially outward from the component, either instead of or in addition to one or more axially-located valves.
  • this format it may be possible to include a central space in the component to allow airflow both around and through it during smoking or inhaling.
  • the component could be substantially spherical with three or more valves provided at spaced locations around its surface to give a multi-directional release.
  • the inner chamber may take the form of one continuous volume. However, in some cases it may be desirable to allow for more than one substance to be kept separate from one another prior to delivery and/or to allow the sequential delivery of multiple doses of one or more substances. Therefore, in some preferred examples, the inner chamber comprises at least two separate sections thereof, each section being containing a flowable substance, and each section being provided with a pressure activated valve for controlled delivery of the substance from the respective section of the inner chamber upon application of external force to the shell.
  • the at least two sections may be separated from one another by an impermeable membrane within the chamber, for example, which could be configured either to rupture or to remain intact when the external force is applied to the component.
  • the respective valves could be arranged to direct the dispensed substances in the same or in different directions to one another.
  • the substance delivery component could take any shape but most preferably is elongate in the direction which will lie along the axis of the inhaler device once incorporated. Most preferably the substance delivery component is substantially cylindrical, at least in the region of the inner chamber.
  • the component is preferably sized to fit inside the diameter of the inhaler device, and in the case where the inhaler device is a smoking article most preferably inside the filter, with sufficient radial clearance so as not to significantly obstruct airflow around the outside of the component.
  • the maximum external diameter of the component is between 1 and 10 mm, more preferably 3 to 5 mm.
  • the length of the component may be between 1 and 30 mm for example, more preferably 3 to 10 mm.
  • the size of the inner chamber can be adapted as necessary to contain the desired quantity of substances but in preferred examples has a volume of between 1 and 200 microlitres, preferably between 5 and 200 microlitres, more preferably between 20 and 100 microlitres.
  • Substance delivery components of the sort described above could be incorporated into smoking articles inside the tobacco rod or adjacent to the filter, but most preferably are incorporated into a cavity within the filter itself.
  • the present invention also provides a filter for a smoking article comprising a substance delivery component as defined above. Two or more such substance delivery components could be incorporated into the filter if desired. One or each of said substance delivery component may preferably contain an additive substance.
  • the filter can be combined with a tobacco rod to form a smoking article using normal manufacturing techniques.
  • the maximum diameter of the substance delivery component is less than that of the filter, the substance delivery component being radially surrounded by filter material (e.g. tow). This allows for flow of air and smoke through the filter, around the substance delivery component.
  • filter material e.g. tow.
  • the substance delivery component obstructs no more than 20 - 50 % of the cross sectional area of the filter although for smaller diameter filters, such as those found in "slim” or "micro-slim” cigarettes this may be up to 95 %.
  • the filter material (e.g. tow) radially surrounding the substance delivery component may be of lower density than filter material in front of or behind the substance delivery component (if the component takes up less than the full length of the filter). This helps to prevent the application of compression forces to the component during manufacture of the filter, which could otherwise inadvertently lead to the release of the substance(s).
  • the filter could be made in two or more sections, one containing the substance delivery component, which are then placed alongside one another and joined to form the filter.
  • the substance delivery component could be wrapped in filter material (e.g. tow) to form a first section of the filter.
  • a second section may be formed of filter material only and placed behind or in front of the first section and optionally a third section also of filter material only may be provided on the other side of the first section.
  • the sections may be joined to one another by wrapping, e.g. with a plug wrap and/or a tipping paper.
  • a method of making a filter for a smoking article may comprise solidifying the flowable substance(s) inside the substance delivery component and then incorporating the substance delivery component into the filter material while the flowable substance(s) are solid, wherein the flowable substance(s) are preferably solidified by freezing. This assists in preventing the inadvertent release of the substance(s) during the manufacturing process.
  • the present invention also provides an inhaler device comprising an additive release component (as defined above), wherein preferably the inhaler device is an aerosol generating device.
  • the present invention further provides an aerosol generating device comprising: a heating assembly; an energy storage component; and a substance delivery component as defined above, wherein the flowable substance is an aerosol generating material.
  • the aerosol generating material is or comprises a tobacco-based substance.
  • the at least one pressure activated valve is configured to direct the controlled delivery of aerosol generating substance towards the heating assembly in use.
  • the present invention further provides an aerosol generating device comprising: a heating assembly; an energy storage component, a reservoir containing an aerosol generating material in use; and a substance delivery component as defined above, wherein the flowable substance is an additive substance, and wherein either: (a) the at least one pressure activated valve is configured to direct the controlled delivery of flowable additive substance towards the heating assembly in use; or (b) the at least one pressure activated valve is configured to direct the controlled delivery of flowable additive substance into the reservoir in use.
  • the reservoir may made of the same or a different material to the substance delivery component, but it is preferably made of a rigid material.
  • the energy storage component may preferably be a battery.
  • the heating assembly may be a heater or a heater and wick assembly (and said heater may be a coil heater, a ceramic heater, an inductive heater, an ultrasonic heater or a piezoelectric heater) or any other heating assembly for vaporising the aerosol generating material.
  • Figures 1 (a), 1 (b), 1 (c) and 1 (d) shows schematic cross-sectional views of inhaler devices in accordance with embodiments of the invention
  • Figure 2 schematically depicts a first embodiment of a substance delivery component in cross section
  • Figures 3(a), 3(b), 4(a) and (b) show perspective views of four further embodiments of substance delivery components
  • FIGS. 5(a) to (h) show eight exemplary valves which may be used in embodiments of the invention.
  • FIGS 6, 7 and 8 depict three further embodiments of substance delivery components.
  • a smoking article 1 in accordance with an embodiment of the invention comprises a tobacco rod 2 and a filter 5 packed with filter material 3, e.g. tow.
  • filter material 3 e.g. tow.
  • a smoking article is lit at a free distal end 2a of the tobacco rod 2 and smoke drawn from this distal free end 2a of the tobacco rod 2 through the filter 3 and onto a proximal end 3b of said filter 5 where it is inhaled by a user.
  • the tobacco rod 2 will be surrounded by a wrapping 6, usually made of paper, which acts to retain the tobacco rod 2 in place and to direct the smoke towards the filter 3.
  • the tipping element 4 retains a proximal connecting end 2b of the tobacco rod 2 and a distal connecting end 3a of the filter 5 in abutment against each other, extending over the joint between the tobacco rod 2 and filter 5, to provide structural integrity to the smoking article 1.
  • the wrapping 6 is continuous along the entire length of the smoking article 1 (as shown in Figure 1A) and in others it continues only to the position where the tobacco rod 2 meets the filter 5 (not shown). In the latter case often a plug wrap (not shown) is provided around the filter 5 to direct smoke and protect the filter material 3.
  • a user-activated component in the form of substance delivery component 10 is disposed in the filter 5.
  • the substance delivery component 10 contains one or more additive substances such as a smoke altering component or substance, e.g., a flavour altering fluid or liquid which alters the flavour or composition of the smoke when the substance delivery component 10 is activated.
  • a smoke altering component or substance e.g., a flavour altering fluid or liquid which alters the flavour or composition of the smoke when the substance delivery component 10 is activated.
  • aerosol generating devices 20, 30, 40 in accordance with embodiments of the present invention each comprise an outer shell 21 , 31 , 41 , a battery 22, 32, 42, mouthpiece end 23, 33, 43 and a heater assembly 24, 34, 44, which is shown as a coil heater.
  • Suction on the mouthpiece end 23, 33, 43 by a user causes air to be drawn into the aerosol generating device 20, 30, 40 via air inlet(s)_(not shown) towards the mouthpiece end 23, 33, 43.
  • Suction on the mouthpiece end 23, 33, 43 may also switch on the battery 22, 32, 42, which activates the heater assembly 23, 34, 44.
  • the battery 22, 32, 42 may be switched in by pressing a push button (not shown) on the aerosol generating device 20, 30, 40.
  • the heater assembly 23, 34, 44 is suitable for vaporising a liquid or solid material, and the vapour that is produced mixes with air that is drawn in from the air inlet(s) (not shown) and is conveyed towards the mouthpiece end 23, 33, 43 as an aerosol.
  • a user-activated component in the form of substance delivery component 25 is disposed within the outer shell 21 of the aerosol generating device 20.
  • the substance delivery component 25 may be activated to controllably release the flowable substance contained therein by compression of the outer shell 21 of the aerosol generating device 20 at a portion of the outer shell adjacent the substance delivery component 25, and said portion may be made of an elastic or deformable material. This way, compression of the elastic or deformable portion of the outer shell 21 translates into the application of an external force upon the shell of the substance delivery component 25, thus causing the flowable substance to be dispensed from the substance delivery component 25 via pressure activated valve 25a.
  • the substance delivery component 25 may be activated by pressing a push button (not shown), which may be the same or a different push button as the one for switching on the battery 22, which also translates into the application of an external force upon the shell of the substance delivery component 25 either directly or indirectly, thus causing the flowable substance to be dispensed from the substance delivery component 25 via pressure activated valve 25a.
  • a push button not shown
  • the substance delivery component 25 may be activated by pressing a push button (not shown), which may be the same or a different push button as the one for switching on the battery 22, which also translates into the application of an external force upon the shell of the substance delivery component 25 either directly or indirectly, thus causing the flowable substance to be dispensed from the substance delivery component 25 via pressure activated valve 25a.
  • the flowable substance that is contained within the substance delivery component 25 is preferably an aerosol generating material such as a tobacco- based substance, composition or liquid, but the flowable substance may also be an additive substance or a mixture of aerosol generating material and additive substance.
  • an aerosol generating material such as a tobacco- based substance, composition or liquid
  • the flowable substance may also be an additive substance or a mixture of aerosol generating material and additive substance.
  • a reservoir 36, 46 and a capillary wick 37, 47 are also provided in each of aerosol generating devices 30, 40.
  • the reservoir 36, 46 is adapted to contain an aerosol generating material such as a tobacco-based substance, composition or liquid in use, whereas the substance delivery component 35, 45 contains an additive substance such as a flavourant.
  • the capillary wick 37, 47 extends into the reservoir 36, 46 at a first end and is surrounded by the coil of the heater assembly 34, 44 at a second end such that the aerosol generating material is drawn from the first end to the second end.
  • the substance delivery component 35, 45 of Figures 1 C and 1 D may each be activated by compression of an elastic or deformable portion of the outer shell 31 , 41 or by pressing a push button (not shown), which may be the same or a different push button as the one for switching on the battery 32, 42
  • a push button (not shown), which may be the same or a different push button as the one for switching on the battery 32, 42
  • Each of these actions may translate into the application of an external force upon the shell of the substance delivery component 35, 45 and cause the flowable substance to be dispensed from the substance delivery component 35, 45 via pressure activated valve 35a, 45a.
  • a difference between the aerosol generating devices of Figures 1 C and 1 D is the arrangement of the substance delivery component 35, 45 in relation to the reservoir 36, 46; in Figure 1 C, the substance delivery component 35 is arranged in series with the reservoir 36 and in Figure 1 D, the substance delivery component 45 is arranged in series with the reservoir 46. It will be appreciated that other physical arrangements of the substance delivery component and the reservoir are also possible.
  • the pressure activated valve 35a of Figure 1 C is configured to direct the controlled delivery of flowable additive substance into the reservoir 36 in use, and then the mixture of the contents of the substance delivery component 35 and the reservoir 36 is drawn towards the heating assembly 34 via capillary wick 37, where it is vaporised to generate an aerosol.
  • the valve 35a is preferably a check valve, i.e.
  • valve that allows flowable substance to flow through it in only one direction from the substance delivery component 35 to the reservoir 36 when the substance delivery component 35 is activated. This advantageously permits a user to gain accurate control over the amount of flowable substance released into the reservoir 36 as well as the reassurance of having said control.
  • the pressure activated valve 45a of Figure 1 D is configured to direct the controlled delivery of flowable additive substance towards the heating assembly 44 directly whilst simultaneously aerosol generating material is drawn towards the heating assembly 44 via capillary wick 47.
  • both the aerosol generating material from the reservoir 46 and the additive substance from the substance delivery component 45 are vaporised to generate an aerosol.
  • Figure 2 shows a substance delivery component 10 according to a first embodiment of the invention in more detail. Features shown in dashed lines are optional and will be described last.
  • the component 10 comprises a shell 1 1 defining an inner chamber 12 therewithin which in use will contain the one or more flowable substances.
  • the flowable substance(s) can take any form provided they are flowable - i.e.
  • the substance(s) can be made to flow by the application of pressure thereto.
  • the additive substance(s) could be any of: fluids (liquids or gases), pastes, gels, suspensions, solutions (e.g. oil or water-based) and flowable solids such as powders, for example.
  • the or each flowable additive substance has a viscosity between 1 and 500,000 centipoise at 25 degrees C, more preferably between 1 and 5,000 centipoise at 25 degrees C, yet more preferably between 1 and 1000 centipoise at 20 degrees C (especially in the case of aerosol generating devices), and most preferably between 50 and 250 centipoise at 20 degrees C (especially in the case of aerosol generating devices).
  • the substance(s) could also comprise shear thickening liquids (viscosity increases with shear stress), shear thinning liquids (viscosity decreases with shear stress), thixotropic liquids (viscosity decreases over time when shaken/agitated/stressed) and rheopectic liquids (viscosity increases over time when shaken/agitated/stressed).
  • Non-Newtonian liquids such as pastes and suspensions may also be used.
  • Examples of flowable substances that are aerosol generating materials could include tobacco-based substances, compositions or liquids.
  • Examples of flowable substances that are additive substances could include: a single flavour, such as menthol, dissolved in a carrier substance, such as an oil or other suitable fluid.
  • a carrier substance such as an oil or other suitable fluid.
  • the additive substance could be a blend of flavours dissolved in a carrier fluid.
  • Further options could be pure water or water with modified viscosity achieved through addition of suitable viscosity-modifying substances, such as thickeners. Such options allow the user to change the flavour or smoking or inhaling characteristics of the inhaler before or at any stage during smoking or inhalation.
  • the shell 1 1 is deformable so that upon application of an external force F by the user (e.g. pressing of the inhaler device between the user's fingers), the inner chamber 12 and its contents will be compressed.
  • the shell 1 1 is elastically deformable such that when the external force F is removed, the shell returns to substantially its original shape and size.
  • the shell may be made out of an elastomeric material such as silicone, flurosilicone, fluoroelastomer or rubber, EPDM, perfluorelastomer, buna rubber, butyl rubber, natural rubber, synthetic rubbers, plastics, TPC and the like.
  • a valve 16 is provided on the shell 1 1 for controlled release of the flowable substance(s) from the inner chamber 12 upon application of an external force F.
  • the valve 16 preferably allows the egress of the substance(s) only during application of the force and returns to a substantially closed state once the force is removed. This allows the user to have control over the amount of the substance that is released and hence to adjust the effect on the substance inhaled, e.g. to achieve a stronger or a weaker flavour according to the user's taste. Additionally or alternatively, the user may elect to dispense the substance in multiple sequential doses rather than all at once, e.g. to prolong the flavoured effect.
  • the valve 16 can be implemented in various different forms and may be opened either directly as a result of the force F applied to the shell 1 1 , and/or by the increased pressure of the substance(s) in the chamber 12 resulting from the compression.
  • the compressive force required to deliver substance(s) may be controlled by selecting the characteristics of the substance delivery component. In preferred examples, the minimum compressive force required to deliver substance from the component lies in the range of 5 to 20 N. Thus, release of the substance(s) may, for example, be initiated by a compressive force equivalent to between 5 and 20 N, with faster or more complete expulsion of the contents being induced at forces above this.
  • the valve 16 is a "duckbill" valve having a single slit 15 through which egress of the substance(s) takes place.
  • the duckbill valve 16 comprises a valve chamber 14 (which is in fluid communication with the inner chamber 12 and preferably forms part of the same) having opposing walls 13a, 13b which approach one another towards the egress slit 15 thereby causing the valve chamber to narrow.
  • each is redirected into a flange portion 14a, 14b which lie parallel to one another. In some instances this flange portion may be very short and not extend far beyond the point at which walls 13a, 13b meet.
  • the valve 16 and shell 11 are preferably formed integrally with one another, e.g. of the same material and advantageously in the same manufacturing process, such as a common injection moulding process.
  • the shell 1 1 and valve 16 could be formed separately and then joined to one another, e.g. by adhesive, heat-welding and/or ultrasonic welding.
  • the overall shape of the component 10 is preferably elongate in the direction which will ultimately be aligned with the long axis of an inhaler device for example the smoking article 1.
  • the cross-section of the component is preferably substantially circular, at least in the region of the inner chamber 12, such that the overall shape of the component is substantially cylindrical.
  • the component could have a length I between 1 and 30 mm for example, more preferably between 3 and 10 mm.
  • the maximum diameter d of the component may lie between 1 and 10 mm, more preferably between 3 and 5 mm for example. It is desirable for the maximum diameter d to be less than that of the filter 5 in which the component 10 is to be incorporated so that (as shown in Figure 1 ) there is room for airflow around the outside of the component 10 through the filter 5.
  • the volume of the inner chamber 12 is preferably between 1 and 200 microlitres, preferably between 5 and 200 microlitres, more preferably between 20 and 100 microlitres.
  • valve 16 may by itself achieve an adequate seal which prevents substantially any egress of the substance(s) in the absence of an applied force.
  • an optional sealant substance 18 such as an adhesive or wax.
  • the sealant may be degradable upon exposure to moisture and/or air such that when the inhaler device is removed from its packaging or the inhalation process is begun, the sealant becomes permeable and allows the release of the flowable substance(s).
  • the sealant 18 may be ruptured by the action of opening the valve to allow egress.
  • the flowable substance(s) may simply be contained by the shell walls 1 1 forming inner chamber 12, which is otherwise empty. However in some cases it may be preferable to provide an optional porous material 19 inside (all or part of) inner chamber 12, which holds the flowable substance(s) in its pores.
  • the porous material 19 could be for example a sponge, foam, fibrous wadding or any other material which is compressible or collapsible upon application of the external force F and will release its contents upon such compression. If the porous material 19 is itself elastically deformable this may help return the shell 1 1 to its original shape and size once the external force F is removed, whether or not the shell material itself is elastic.
  • the use of such a porous material can be of assistance when filling the component 10 (as described below) and can also help the user to dispense the desired dose of flowable substance by acting to resist the compression of the inner chamber 12 thereby enabling greater control.
  • Figure 3(a) shows an exemplary component 10 having a single-slit duckbill valve 16 (as in the Figure 2 example).
  • the shell 1 1 is formed of a single unitary wall construction which is integral with the valve.
  • the end of the shell opposite from the valve 16 could be formed by joining the side walls to one another, e.g. by heat-sealing.
  • Figure 3(b) shows another exemplary substance delivery component 10 which is the same as that of Figure 3(a) except that here the valve 16 is a domed cross-slit valve, i.e. having a membrane formed into the shape of a dome through which two slits 15 have been formed approximately orthogonally to one another.
  • a single slit 15 may be formed through the dome, or a plurality of slits 15 could be provided in different arrangements. Still further, the membrane need not be domed but could be flat. Valve arrangements of these sorts are also suitable for providing the above- described controlled dispensation of the flowable substance but are generally preferred where the viscosity of the flowable substance is relatively high (due to the increased potential for leakage) and/or where a lesser degree of control over the dispensing is acceptable.
  • the flowable substance(s) may be inserted into the inner chamber 12 during manufacture through the valve egress point 15, e.g. by injection with a hollow needle, or by first evacuating the inner chamber and utilising the resulting vacuum pressure to fill the chamber.
  • the filling step could optionally form part of the valve manufacture process, e.g. resulting in the formation of egress slit(s) 15.
  • a flat hollow needle could be used to both inject the substance(s) and in doing so form slot 15.
  • the substance(s) could be injected through the shell 1 1 at some other location on the component provided the shell material can be pierced without fracturing.
  • the resulting hole may become adequately resealed as a result of the shell material's inherent elasticity and/or could be sealed with a sealant substance such as adhesive, wax etc.
  • the component 10 may be provided with a further aperture for filling of the inner chamber 12 therethrough.
  • Figures 4(a) and 4(b) show two exemplary delivery components 10 corresponding in terms of their valve arrangements to those of Figures 3(a) and 3(b) respectively.
  • each component 10 is additionally provided with an aperture 17 through the shell wall 1 1 into the inner chamber 12 which is closed by a sealing member 18 such as a membrane or cap.
  • the sealing member 18 may be affixed across the aperture 17 by adhesive, heat sealing or another joining method, or mechanical fixing.
  • the flowable substance(s) are inserted into the inner chamber 12 through the (open) aperture 17 and then the sealing member 18 is affixed.
  • the substance(s) may for example be solidified into pellets (e.g. frozen) before being placed into the inner chamber and subsequently allowed to liquefy (e.g. thaw), or could be formed into capsules with a frangible or soluble coating which is then opened to release the substance(s) into the inner chamber.
  • a porous material 19 this could be immersed into the substance(s) to absorb a quantity thereof, and then placed into the inner chamber.
  • the substance(s) could be poured or injected into the inner chamber 12 though the aperture 17.
  • FIGS 5(a) to (h) show eight examples of valves 16 which are suitable for use in an substance delivery component 10 of the sort described above.
  • Figures 5(a) to (e) show further examples of "duckbill" valves.
  • the valve 16 shown in Figure 5(d) is most similar to that described above with respect to Figure 2, albeit with a considerably shorter flange region (along which slit 15 is defined).
  • the valve chamber 14 has curved rather than straight walls, resulting in a domed shape.
  • two egress slits 15 are provided orthogonal to one another (i.e.
  • a "cross-slit" each defined by a flange which extends a distance away from the domed valve chamber 14.
  • the walls of the chamber 14 are straight and angled towards one another (as in Figure 2 and Figure 5(d)).
  • three egress slits 15 are provided, arranged approximately equidistant to one another around the axis of the valve, and in the Figure 5(e) example, two egress slits are provided orthogonal to one another, forming a cross slit.
  • Figure 5(f) shows an example of a dome valve similar to that of Figures 3(b) and 4(b), in cross section.
  • a single egress slit 15 is shown but in practice another may be provided in the cross-sectional plane to form a cross slit.
  • Figures 5(g) and (h) show two variants of duckbill valves in cross section.
  • Figure 5(g) shows a flanged (single slit) duckbill valve, having an annular flange 16' for ease of attachment to the shell 1 1
  • Figure 5(h) shows a sleeved duckbill valve with no flange.
  • the flange 14 in which the egress slit 15 is formed is folded back on itself, e.g. by 90 degrees or more, to prevent potential leakages (particularly during the manufacture of the filter) and reduce required pressure differential and liquid viscosity requirements.
  • the duckbill valve may be inverted in on itself to provide additional structural rigidity and a more compact overall structure.
  • the estubstance delivery component 10 has a single valve 16 so that the flowable substance(s) are released in one direction only and this will be desirable in many cases.
  • the delivery direction A will be along the long axis of the smoking article 1 , most preferably towards the tobacco rod 2 (as shown in Figure 1 ).
  • delivery direction A will be along the long axis of the aerosol generating device 20, 30, 40, most preferably ultimately towards the heating assembly 24, 34, 44.
  • FIG 6 shows an embodiment of an substance delivery component 10 having two valves 16a, 16b.
  • the valves 16a and 16b open and the flowable substance(s) are expelled though egress slit 15a in the direction A and also through egress slit 15b in the direction B.
  • the two valves are arranged at approximately 180 degrees relative to one another, e.g. at opposite ends of the inner chamber 12, as shown so that the directions A and B are opposite to one another. In this way the flowable substance(s) can be directed both towards the tobacco rod 2 and towards the user's mouth in the case where the inhaler device is a smoking article 1.
  • FIG. 7 Another embodiment of an substance delivery component 10 is shown in Figure 7 and here the valves 16a, b, c and d are depicted only schematically using arrows indicating the primary direction in which each will release the flowable substance(s).
  • a first valve 16a is provided at one end of the inner chamber 12 (as in Figure 2) and is arranged to release the flowable substance in the direction A which is preferably aligned along the long axis of the inhaler device.
  • One or more additional valves 16b, 16c and 16d are provided around the circumferential surface of the shell 1 1 , each being arranged to release flowable substance in a radial direction R, i.e. at approximately 90 degrees from the direction A.
  • the inner chamber 12 it is also possible to divide the inner chamber 12 into two or more sections each provided with its own valve 16, so that two or more flowable substances may be stored separately from one another in the component 10.
  • the flowable substances in each section may be the same or different from one another (e.g. different flavours and/or strengths). For example, it may be desirable to keep different substances separate such that they do not mix until release.
  • the different sections could allow for sequential release of multiple doses.
  • the sections could be of different sizes from one another allowing for the user to select the dose to be released through selection of which section to open.
  • An example of a component 10 having multiple sections forming inner chamber 12 is shown in Figure 8. Again, features which are the same as those described with reference to Figure 2 are labelled using like reference numerals.
  • the inner chamber 12 is divided into two sections 12a and 12b by an impermeable membrane or other divider 1 1a, which may be formed integrally with the shell 1 1.
  • the divider 1 1 a may be configured to withstand the compressive force F applied by the user or could be designed to break and allow mixing of the substances contained therewithin.
  • Each section 12a, 12b of the chamber is provided with a respective valve 16a, 16b.
  • the valves are arranged parallel to one another such that both will release the flowable substances in the direction A, but this is not essential.
  • each valve could be arranged to release its respective flowable substance in a different direction.
  • the embodiment of Figure 6 could be modified by the addition of a divider through its centre to form a first section of the inner chamber 12 the contents of which will be released by valve 16a, and a second section which will be opened by valve 16b.
  • the substance delivery component 10 is preferably sized to fit within a filter 5 of a smoking article 1 when used with such devices so as not to obstruct airflow therethrough.
  • the component 10 may preferably have a maximum cross-sectional area which is no more than 20 to 50 % of the cross sectional area of that of the filter 5, although for smaller diameter filters, such as those found in "slim” or "micro-slim” cigarettes, this may be up to 95 %.
  • the component 10 is preferably radially surrounded by filter material 3.
  • the component 10 may be incorporated into a filter 5 of a smoking article 1 during manufacture thereof. This could be achieved for example by adjusting the density of the filter material 3 (e.g.
  • the contents of the component 10 may be solidified, e.g. frozen, prior to and during incorporation into the filter 5.
  • the filter is formed of at least two sections: three in this example.
  • a first section 5a is formed by wrapping filter material 3 around the circumferential surface of the additive delivery component 10.
  • At least a second section 5b or a third section 5c is formed of filter material 3 only to substantially the same external diameter.
  • the first section 5a containing the component 10 is then placed between the second and third sections 5b, c as shown in Figure 9a to form the complete filter 5.
  • the sections are adjoined to one another, e.g. by wrapping with a tipping paper 4 (or plug wrap) as shown in Figure 9(b).
  • the filter 5 can be joined to a tobacco rod 2 to form a smoking article 1 using conventional techniques.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

Un composant de distribution de substance pour un dispositif d'inhalation est prévu. Le composant d'administration de substance comprend une coque de matériau déformable définissant une chambre interne fermée contenant au moins une substance coulante. La coque comprend au moins une soupape activée par pression pour l'administration contrôlée d'une substance (s) à partir de la chambre interne lors de l'application d'une force extérieure à la coque.
PCT/EP2015/073483 2014-10-10 2015-10-09 Substance un composant de distribution destiné à des dispositifs d'inhalation Ceased WO2016055653A1 (fr)

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