WO2012156689A2 - An additive release component, a filter for a smoking article, a smoking article and a method of manufacturing - Google Patents

An additive release component, a filter for a smoking article, a smoking article and a method of manufacturing Download PDF

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Publication number
WO2012156689A2
WO2012156689A2 PCT/GB2012/051033 GB2012051033W WO2012156689A2 WO 2012156689 A2 WO2012156689 A2 WO 2012156689A2 GB 2012051033 W GB2012051033 W GB 2012051033W WO 2012156689 A2 WO2012156689 A2 WO 2012156689A2
Authority
WO
WIPO (PCT)
Prior art keywords
additive
release component
additive release
component
filter
Prior art date
Application number
PCT/GB2012/051033
Other languages
English (en)
French (fr)
Other versions
WO2012156689A3 (en
Inventor
Charanjit Nandra
Jane NICHOLLS
Nicole Hooper
Edward Awty
Darren Seymour
Paul Farenden
Paul Frobisher
Michael Newnham
Derek Roberts
Richard Harbutt
Original Assignee
British American Tobacco (Investments) Limited
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 British American Tobacco (Investments) Limited filed Critical British American Tobacco (Investments) Limited
Publication of WO2012156689A2 publication Critical patent/WO2012156689A2/en
Publication of WO2012156689A3 publication Critical patent/WO2012156689A3/en

Links

Classifications

    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/067—Use of materials for tobacco smoke filters characterised by functional properties
    • A24D3/068—Biodegradable or disintegrable
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/283—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by encapsulation of the chemical substances
    • 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
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/066—Use of materials for tobacco smoke filters characterised by structural features in the form of foam or having cellular structure
    • 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
    • A24D3/17—Filters specially adapted for simulated smoking devices

Definitions

  • the present invention relates to an additive release component.
  • the present invention also relates to a filter for a smoking article comprising an additive release component, a smoking article comprising an additive release component, and a method of manufacturing an additive release component.
  • smoking article includes smokeable products such as cigarettes, cigars and cigarillos whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes and also heat-not-burn products.
  • the smoking article may be provided with a filter for the gaseous flow drawn by the smoker.
  • the present invention provides, in a first aspect, an additive release component for a smoking article, wherein the additive release component is configured to release a plurality of discrete deliveries of additive.
  • the present invention provides, in a second aspect, a filter for a smoking article comprising an additive release component, wherein the additive release component is configured to release a plurality of discrete deliveries of additive.
  • the present invention provides, in a third aspect, a smoking article comprising an additive release component, wherein the additive release component is configured to release a plurality of discrete deliveries of additive.
  • the present invention provides, in a fourth aspect, a method of manufacturing an additive release component, wherein the additive release component is configured to release a plurality of discrete deliveries of additive, and wherein the method comprises: forming a component for containing an additive, filling the component with additive, and sealing the component.
  • the present invention provides, in a fifth aspect, a method of manufacturing a filter comprising: forming a plurality of additive release components configured to release a plurality of discrete deliveries of additive which are connected in an elongate strip, and inserting the elongate strip into filtration material.
  • the present invention provides, in a sixth aspect, an additive release component for a smoking article, wherein the additive release component comprises a substrate comprising an additive, wherein the additive is contained within the substrate.
  • Figure l shows a cut-away perspective view of a smoking article according to a first embodiment
  • Figure 2 shows a perspective view of the smoking article according to the first embodiment
  • Figure 3 shows a perspective view of a smoking article according to a second embodiment
  • Figure 4 shows a perspective view of a smoking article according to a third
  • Figure 5 shows a perspective view of an additive release component according to a fourth embodiment
  • Figure 6 shows a perspective view of an additive release component according to a fifth embodiment
  • Figure 7 shows a schematic perspective view of an additive release component according to a sixth embodiment
  • Figures 8a and 8b show schematic perspective views of an additive release component according to a seventh embodiment
  • Figure 9 shows a schematic perspective view of an additive release component according to an eighth embodiment
  • Figure 10a shows a perspective view of an additive release component according to a ninth embodiment
  • Figure 10b shows a cross-sectional view of the additive release component shown in Figure 10a;
  • Figures na and lib show perspective views of an alternative additive release component according to the ninth embodiment
  • Figure 12a shows a perspective view of an additive release component according to a tenth embodiment
  • Figure 12b shows a cross-sectional view of the additive release component shown in Figure 12a;
  • Figure 12c shows another cross-sectional view of the additive release component shown in Figure 12a;
  • Figure I2d shows a front view of the additive release component shown in Figure 12a;
  • Figure 13 shows a perspective view of a partially formed additive release component assembly;
  • Figure 14 shows a perspective view of a first embodiment of a partially formed filter according to a first method
  • Figure 15 shows a perspective view of a second embodiment of a partially formed filter according to a second method
  • Figure 16 shows a front elevation view of an apparatus and partially formed additive release components according to a third method
  • Figure 17 shows a front elevation view of an apparatus and formed additive release components according to the third method
  • Figure 18 shows a front elevation view of an apparatus and partially formed filters according to a fourth method.
  • Figure 19 shows a front elevation view of partially formed filters according to the fourth method.
  • An additive release component for inclusion in a smoking article wherein the additive release component is configured to release a plurality of discrete deliveries of additive.
  • the additive release component holds or stores a payload of additive. Upon actuation of the component, for example by application of a compressive force, a portion of the payload of additive is released from the component. Further actuations of the additive release component provide release of further portions of the payload, providing a plurality of discrete deliveries.
  • An additive release component is anything that is capable of retaining an additive and releasing it as and when desired.
  • an additive release component may be a capsule or other component, and may comprise a sponge-like material, an adsorbent material, a gel material, or any other suitable material.
  • An additive may be anything that can be added to a smoking article to modify the composition or modify the properties of the smoke produced by the smoking article, for example.
  • An additive may be a solid, such as a powder; a liquid, such as a liquid flavourant; or a gas, such as an aromatic composition.
  • the additive may be a
  • flavourant a deodoriser, a diluent, an adsorbent, or any other substance that is capable of modifying the gaseous flow.
  • the additive may be water, and, where local regulations permit, the additive may be a flavourant.
  • flavourant and “flavourant” refer to materials which, where local regulations permit, may be used to create a desired taste or aroma in a product for adult consumers.
  • extracts e.g., licorice, hydrangea, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, menthol, Japanese mint, aniseed, cinnamon, herb, wintergreen, cherry, berry, peach, apple, Drambuie, bourbon, scotch, whiskey, spearmint, peppermint, lavender, cardamon, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, cassia, caraway, cognac, jasmine, ylang-ylang, sage, fennel, piment, ginger, anise, coriander, coffee, or a mint oil from any species of the genus Mentha), flavour enhancers, bitterness receptor site blockers, sensorial receptor site activators or stimulators, sugars and/or sugar substitutes (e.g., sucralose, acesulfame potassium
  • the flavour may be a tobacco flavour. Where the flavour is delivered in liquid form, the tobacco flavour could be derived from tobacco extract. Where the flavour is derived from a solid product, the product could be tobacco leaf in shredded, particulate or granular form, or in the form of reconstituted tobacco sheet material.
  • the additive release component may comprise an outer shell that is frangible, resiliently deformable, or plastically deformable.
  • the additive in the additive release component may be held by or incorporated in a retaining structure.
  • said substrate may have an open- cell structure, a closed-cell structure, or a fibrous structure.
  • the additive release component comprises one or more apertures through which additive is released. In further embodiments, one or more of these apertures are formed or are opened when the outer shell of the component is deformed upon the application of compressive force.
  • FIGS l and 2 show a smoking article according to some embodiments.
  • the smoking article 10 comprises a source of smokeable material, which is preferably tobacco, in the form of a cylindrical tobacco rod n.
  • a filter 20 is coaxially attached to the tobacco rod 11.
  • the filter 20 comprises one or more additive release components, preferably, a single additive release component 15.
  • the additive release component is any component capable of storing an additive in non-operative condition, and selectively releasing the additive to modify the smoke of the smoking article.
  • the additive release component may, in some embodiments, preferably be in the form of a capsule.
  • the filter 20 comprises filtration material 12 surrounded by a porous sheet material, preferably a porous paper, e.g. plug wrap.
  • the filtration material 12 preferably comprises a homogenous filtration material, for example, cellulose acetate tow as is conventionally known.
  • the term "homogenous” is used to mean that the filtration material is substantially uniform throughout the filter, and in particular, is uniform in a radial direction through the filtration material.
  • the additive release component 15 is located within the filtration material.
  • the additive release component preferably a capsule 15, contains additive contents as a fluid, preferably a liquid. The additive release component may be deformed by inward radial pressure from a user, which releases a part of the additive contents.
  • the additive contents in the additive release component 15 may be a flavourant, for example a menthol solution, or may be water.
  • the additive release component 15 comprises an outer wall and an inner volume filled with the fluid.
  • the additive can be selectively released by the user of the smoking article into the adjacent filtration material 12 by squeezing the outside of the filter to deform and/ or rupture the outer wall of the additive release component.
  • the additive release component 15 is configured to release the additive contents in a plurality of discrete deliveries.
  • the additive release component 15 is configured to release only a part of the contents at any one time, e.g. by compressing the additive release component 15.
  • the outer wall or shell may be formed of gelatin, hydroxypropyl methylcellulose (HPMC), polyvinyl alcohol (PVOH), polyethylene (PE) or any other suitable material.
  • the additive release component 15 comprises an outer shell which is resiliently deformable.
  • the outer shell functions as a single part, wherein the material of the outer shell is deformable.
  • the outer shell may be formed from one part, or two (or more) parts sealed together.
  • an outer shell formed from two parts is configured to rupture at a weakened region, for example along a longitudinal or circumferential seam joining the two parts, which opens under pressure to define a slit.
  • the outer shell contains the additive, preferably flavourant or water, in an inner volume, i.e. hollow cavity.
  • the outer shell surrounds and
  • the outer shell may be configured to rupture in a predetermined area, over only part of the surface area, and preferably rupture to form one or more slits or apertures, when compressed.
  • the outer shell defines a single slit (or a line of weakening that opens under pressure to form a single slit) which preferably extends longitudinally.
  • the additive release component 15 is configured to release only a part of the contents through the slit when the additive release component 15 is compressed.
  • the resiliently deformable additive release component 15 at least partially returns towards its original shape, when the compression of the additive release component 15 ceases. After the compression has finished, the slit defined by the additive release component 15 effectively closes, and no further contents are released from the additive release component 15.
  • the additive release component 15 deforms such that the resilient slit opens, and a further discrete delivery of the contents is released.
  • the outer shell may be configured to define an outlet having any shape, and is not limited to the slit described.
  • the outlet may be a pin-hole, or a region of weakening that opens to form an outlet under pressure.
  • the outlet may not form in a pre-determined area, but may form on any part of the outer shell when a force is applied. The location of the outlet may depend on the exact force applied, and any inherent (i.e. not controlled) variation in the thickness of the outer shell.
  • the additive release component 15 comprises an outer shell which is frangible.
  • the outer shell is preferably configured to break apart over substantially the whole surface of the outer shell, or alternatively rupture only in a predefined area when compressed.
  • the outer shell surrounds the additive, and does not initially contain an aperture.
  • the outer shell contains the additive, preferably flavourant or water, in a substrate or retaining structure within the outer shell.
  • the substrate or retaining structure is preferably a body of absorbent material impregnated with the additive.
  • the substrate may be a porous matrix with an open structure, in particular, an open cell foam structure. The description refers to a foam, but applies to any type of matrix with an open cell structure.
  • the substrate or retaining structure is configured to be progressively compressible and configured to release at least a part, and preferably only a part, of the additive contents when partly compressed.
  • the additive is distributed within the substrate or retaining structure, and preferably, absorbed by the substrate or retaining structure.
  • the substrate or retaining structure is preferably formed of a filtration material, for example, cellulose acetate.
  • the filtration material may be in the form of a known tow of filtration material suitable as a filter.
  • the outer shell does not inhibit release of the additive once ruptured.
  • the substrate or retaining structure may be at least partially resiliently deformable and may at least partially return towards original shape, when the compression of the additive release component 15 ceases. In the partial expansion of the substrate following release of the compressive force, the substrate may re-absorb a part of the released additive. References to release of the additive are intended to refer to the net release of additive after the compressive force has ended. On a further partial compression, the substrate releases a further discrete delivery of the contents.
  • the additive release component 15 comprises an outer shell which is deformable.
  • the outer wall is preferably plastically deformable, such that a deformation is maintained after the deforming force ceases.
  • the outer shell contains the additive, preferably flavourant or water, in an inner volume.
  • the outer shell surrounds the additive, and does not initially contain an aperture.
  • the outer shell is configured to rupture in a predetermined area over only a part of the surface, and preferably rupture to form one or more slits or apertures of other shapes e.g. pin-holes, when compressed.
  • the outer shell defines a single slit, which preferably extends longitudinally.
  • the outer shell functions as a single part, wherein the material of the outer shell is deformable.
  • the outer shell may be formed from one part, or two (or more) parts sealed together.
  • an outer shell formed from two parts is configured to rupture along a longitudinal seam joining the two parts to define a slit.
  • the additive release component 15 is configured to release only a part of the contents through the slit when the additive release component 15 is partially compressed.
  • the plastically deformable additive release component 15 does not return towards its original shape, when the compression of the additive release component 15 ceases.
  • the additive release component and/or additive is configured such that no further contents are released from the additive release component 15. On a further compression, the additive release component 15 deforms further such that a further discrete delivery of the contents is released.
  • the additive release component comprises a matrix with a closed cell structure, in particular, a closed cell foam substrate or a closed cell structure.
  • the description refers to a foam, but applies to any type of matrix or structure with a closed cell configuration.
  • the closed cell foam defines a matrix having a plurality of small cavities which contain additive. The cavities are closed by the foam or support material, retaining the additive until selective release. On application of a compressive force, the closed cell foam is configured to release additive.
  • the compressed closed cell structure develops cracks and/or openings in the support material, which allow release of the additive.
  • the additive release component is configured to release only a part of the contents when partially compressed.
  • the structure preferably substantially plastically deforms on compression. Alternatively, the substrate may partially return towards its original dimensions.
  • the closed cell foam structure does not require an outer shell to retain the additive, and so may form the additive release component without an outer shell.
  • the additive release component may comprise the closed cell foam substrate encapsulated in an outer shell.
  • the outer shell may be frangible, plastically deformable or resiliently deformable on compression.
  • the closed cell structure may be formed by extrusion of the material containing the additive. The extruded closed cell foam is then cut to a suitable length.
  • the closed cell foam may be made from cellulose acetate.
  • the open or closed cell structure may contain a plurality of additive release components, each comprising encapsulated additive.
  • the substrate may be fibrous, e.g. formed of cellulose acetate fibres, with additive dispersed therein as droplets or as microcapsules. The droplets or
  • microcapsules are preferably distributed within the matrix or fibres.
  • the microcapsules are preferably attached to the one or more threads or fibres, which are formed or arranged into a three-dimensional substrate.
  • the substrate is optionally surrounded by a frangible, elastically deformable or plastically deformable outer shell.
  • the substrate is preferably configured such that the additive can be released in a plurality of discrete deliveries, preferably by a plurality of separate compressions. This differs from a conventional capsule having a frangible outer shell, in which all the additive is released at once when the outer shell is ruptured.
  • any type of the additive release component may comprise a substrate within the outer shell.
  • the additive is distributed within the substrate.
  • the substrate is preferably an open cell foam material or open cell structure, which is compressible and configured to release only a part of the additive contents when compressed.
  • the substrate is preferably formed of a filtration material, for example, cellulose acetate tow.
  • the substrate may be resiliently deformable, contained within a plastically deformable outer wall but is prevented from returning to its original shape by the outer wall when compression ceases.
  • the open cell structure may actuate or follow a resilient outer wall at least partially towards its original shape when compression ceases.
  • the open cell foam substrate or structure may not resiliently return towards to its original size, and may plastically deform when compressed.
  • the outer wall or shell or any type of additive release component may be configured as a structural part, which provides strength to allow handling of the additive release component.
  • the outer wall or shell may have a thickness of approximately 0.2mm.
  • the outer wall or shell may be a coating on the exterior of the substrate, which does not provide structural strength.
  • Figures 1 and 2 show the filter 20 according to a first embodiment of the invention is covered by a covering layer 16.
  • the covering layer is a sheet material wrapped around the filtration material, and forming an exterior of the filter 20.
  • the covering layer 16 may connect the filter 20 to the tobacco rod 11, and may be formed of a paper material, e.g. tipping paper.
  • the covering layer 16 may be at least partially transparent.
  • the covering layer 16 may define one or more transparent windows 22a, 22b, 22c through which the additive release component 15 can be viewed.
  • the additive release component 15 may be of any type described above.
  • the transparent area(s) of the covering layer allows viewing of the additive release component 15.
  • the covering layer 16 around the windows 22a, 22b, 22c is preferably opaque, and may be patterned or coloured.
  • the additive release component 15 is preferably surrounded by filtration material 12.
  • the one or more windows may each comprise a channel extending through the filtration material, aligned with the one or more transparent windows in the covering layer.
  • a plurality of separate and longitudinally spaced channels 23a, 23b, 23c extend through the filtration material, perpendicular to the longitudinal axis of the filter 20, and aligned with the plurality of windows 22a, 22b, 22c in the covering layer.
  • the windows with channels allow viewing of the additive release component from the exterior of the filter.
  • Figure 3 shows a second embodiment of smoking article 100 according to the present invention.
  • the smoking article 100 comprises a source of smokeable material, which is preferably tobacco, in the form of a cylindrical tobacco rod 11.
  • a filter 120 is coaxially attached to the tobacco rod 11.
  • the filter 120 comprises one or more additive release components, preferably in the form of capsules, and preferably a single additive release component 115.
  • the additive release component 115 may be of any type described above.
  • the additive release component 115 may be substantially cylindrical, or may be substantially tubular having a cross-sectional area or diameter which varies along its length. In particular, the cross-section or diameter may be greater at one or both ends than the cross-section or diameter at the longitudinal centre of the additive release component 115.
  • the additive release component 115 may be cylindrical, and the reduced diameter between the ends caused by radial compression of the filter.
  • the filter 120 comprises filtration material surrounded by a porous sheet material, preferably a porous paper, e.g. plug wrap.
  • An additive release component 115 is located within the filtration material.
  • the additive release component 115 comprises an open cell foam or porous matrix type material containing additive, as described with respect to the second type above.
  • the additive is preferably a fluid absorbed by the substrate.
  • the additive release component 115 is configured to release only a part of the additive on inward pressure from a user.
  • the additive release component 115 is configured to release the additive contents in a plurality of discrete deliveries.
  • the additive release component 115 is configured to release only a part of the contents at any one time, e.g. by partially compressing the additive release component 115.
  • the filter 120 is covered by a covering layer 116.
  • the covering layer is a sheet material wrapped around the filtration material, and forming an exterior of the filter 120.
  • the covering layer 116 may connect the filter 120 to the tobacco rod 11, and may be formed of a paper material, e.g. tipping paper.
  • the covering layer 116 may be at least partially transparent.
  • the covering layer 116 may define one or more transparent windows, and preferably a plurality of windows 122a, 122b through which the additive release component 115 can be viewed.
  • the windows I22a,i22b may comprise a transparent material attached to the covering layer 116.
  • the transparent area of the covering layer allows viewing of the capsule 115 around the filter 120.
  • the covering layer 116 around the windows 122a, 122b is preferably opaque, and may be patterned or coloured.
  • the windows I22a,i22b comprise a plurality of sets of longitudinally spaced windows, wherein each set of windows is circumferentially spaced.
  • the filter 120 may comprise two, three, four or more sets of circumferentially spaced windows, which are preferably symmetrically spaced around the circumference of the filter 120.
  • the additive release component 115 is preferably surrounded by filtration material 12.
  • the one or more windows 122a, 122b may each comprise a channel extending through the filtration material or a gap in the filtration material, aligned with the one or more transparent windows in the covering layer.
  • a plurality of separate and longitudinally spaced channels or gaps 123a, 123b extend through the filtration material, perpendicular to the longitudinal axis of the filter 120, and aligned with the plurality of windows 122a, 122b in the covering layer.
  • the windows with channels or gaps allow viewing of the additive release component from the exterior of the filter.
  • FIG. 4 shows a third embodiment of smoking article according to the present invention.
  • the smoking article 200 comprises a source of smokeable material, which is preferably tobacco, in the form of a cylindrical tobacco rod 11.
  • a filter 220 is coaxially attached to the tobacco rod 11.
  • the filter 220 comprises one or more additive release components, preferably in the form of capsules, and preferably a single additive release component 215.
  • the additive release component 215 may be of any type described above.
  • the filter 220 comprises filtration material surrounded by a porous sheet material, preferably a porous paper, e.g. plug wrap.
  • An additive release component 215 is located within the filtration material.
  • the additive release component 215 comprises an outer shell, as described with respect to any of the types described above.
  • the additive is preferably a fluid contained within the outer shell, and optionally, absorbed in a substrate.
  • the additive release component 215 is configured to release only a part of the additive on inward pressure from a user.
  • the additive release component 215 is configured to release the additive contents in a plurality of discrete deliveries.
  • the additive release component 215 is configured to release only a part of the contents at any one time, e.g. by partially compressing the additive release component 215.
  • the filter 220 is covered by a covering layer 216.
  • the covering layer is a sheet material wrapped around the filtration material, and forming an exterior of the filter 220.
  • the covering layer 216 may connect the filter 220 to the tobacco rod 11, and may be formed of a paper material, e.g. tipping paper.
  • the covering layer 216 may be at least partially transparent.
  • the covering layer 216 may define one or more transparent windows, and preferably a single transparent window 222 through which the additive release component 215 can be viewed.
  • the window 222 may comprise a transparent material attached to the covering layer 216.
  • the transparent area of the covering layer allows viewing of the capsule 215 from outside the filter 220.
  • the covering layer 216 around the window 222 is preferably opaque, and may be patterned or coloured.
  • the additive release component 215 is preferably surrounded by filtration material 12.
  • the one or more windows may each comprise a channel extending through the filtration material, aligned with the one or more transparent windows in the covering layer.
  • a single longitudinally extending channel 223 extends through the filtration material, perpendicular to the longitudinal axis of the filter 220, and aligned with the window 222 in the covering layer.
  • the window with channel allows viewing of the additive release component from the exterior of the filter.
  • Figure 5 shows an additive release component 35 according to a fourth embodiment of the present invention.
  • the additive release component 35 is substantially as described above in any embodiment or the first to fourth types described above.
  • the additive release component 35 is a substantially elongate tube, and preferably has a
  • each additive release component 35 can be of a smaller diameter than an equivalent single spherical additive release component 35 containing the same quantity of liquid.
  • the additive release component 35 can therefore be located in a smaller diameter filter than the equivalent spherical additive release component 35, or, the filter 20 may comprise an increased radial depth of filtration material 12 around the additive release component 35 than the equivalent spherical capsule.
  • a user can select the quantity of liquid released by compressing the additive release component 35 a selected number of times. The released liquid may therefore be sequentially increased or selected.
  • the additive release component 35 may be substantially tubular with curved ends.
  • a flange 34 may extend at the curved ends, which may comprise excess material for forming the outer shell.
  • the additive release component 35 comprises a line of weakening 37.
  • the line of weakening extends longitudinally, preferably extends substantially the whole length of the additive release component 35.
  • the additive release component 35 may rupture only along the line of weakening, or may rupture initially at the line of weakening and immediately rupture over substantially the whole area of the additive release component 35.
  • the line of weakening 37 may define a longitudinal slit which resiliently opens on compression of the additive release component 35, as described above.
  • the line of weakening may be formed by a joint between two parts of the additive release component, or may be defined in an independent process in a selected area, e.g. by scoring the surface of the outer wall.
  • Figure 6 shows an additive release component 45 in a filter 40, according to a fifth embodiment of the present invention.
  • the deformable additive release component 45 contains an additive, and is configured to release only a part of the additive contents when partly compressed for the first time, and the reminder on successive
  • the additive release component 45 is configured to provide a plurality of discrete deliveries of the additive contents, and may be configured according to any type of additive release component described with respect to Figures 1 to 3 and as described above.
  • the filter 40 may form part of a smoking article when attached to a source of smokeable material.
  • the additive release component 45 is preferably substantially tubular, and extends longitudinally in the filter 40, surrounded by filtration material 42.
  • the additive release component 45 preferably has substantially hemispherical longitudinal ends.
  • the additive release component 45 has an aperture 47 through which the contents 49 can be released.
  • the aperture 47 is at a longitudinal end of the additive release component 45, and is preferably located on a central longitudinal axis.
  • a part of the additive contents 49 is ejected from additive release component 45 on an initial partial compression, the rest on subsequent compressions.
  • the aperture may be formed by a slit or slit valve.
  • the outer wall may be provided with a narrow slit, which substantially prevents additive from exiting when the additive release component is not compressed.
  • the deformation of the outer wall and/or pressure of the additive causes the slit to open, and additive to be ejected.
  • the slit or slit valve closes when the compression ceases, allowing for a plurality of discrete deliveries.
  • the aperture 47 may be formed by a rupture of an area of weakness in the outer wall of the additive release component 45 when the additive release component 45 is compressed.
  • the aperture has been shown at only one end of the additive release component.
  • the additive release component may be at both longitudinal ends.
  • the additive release component may define apertures at any two spaced apart locations.
  • the presence of one or more apertures is applicable to any
  • Figure 7 shows an additive release component 55 in a filter 50, according to a sixth embodiment of the present invention.
  • the deformable additive release component 55 contains an additive, and is configured to release only a part of the additive contents when initially partially compressed.
  • the additive release component 55 is configured to provide a plurality of discrete deliveries of the additive contents.
  • the filter 50 may form part of a smoking article when attached to a source of smokeable material.
  • the additive release component 55 is preferably substantially tubular, and extends longitudinally in the filter 50, surrounded by filtration material 52.
  • the additive release component 55 preferably has substantially hemispherical longitudinal ends.
  • the additive release component 55 has an aperture 57 through which the contents 59 can be released.
  • the aperture may be formed by a slit valve.
  • the outer wall may be provided with a narrow slit, which substantially prevents additive from exiting when the additive release component is not compressed.
  • the deformation of the outer wall and/or pressure of the additive causes the slit to open, and additive to be ejected.
  • the slit valve closes when the compression ceases, allowing for a plurality of discrete deliveries.
  • the aperture 57 may be formed by a rupture of an area of weakness in the outer wall of the additive release component 55 when the additive release component 55 is compressed.
  • the aperture 57 is at a longitudinal end of the additive release component 55, and is preferably located on a central longitudinal axis.
  • a part of the additive contents 59, preferably a fluid, is ejected from additive release component 55 on an initial partial compression, the rest on subsequent compressions.
  • the outer wall or shell may be substantially as described in any other embodiment.
  • the aperture has been shown at only one end of the additive release component.
  • the additive release component may be at both longitudinal ends.
  • the additive release component may define apertures at any two spaced apart locations.
  • the additive contents 59 are initially contained within a plurality of additive release elements 58, which are contained within the outer wall of the additive release component 55.
  • the outer wall of the additive release component 55 therefore does not directly contact the additive until it is released from the additive release elements 58.
  • the additive release elements 58 are microcapsules with diameters significantly smaller than the inner diameter of the wall of the additive release component 55, typically imm or less, so that a plurality of microcapsules can be accommodated within the additive release component 55.
  • the outer walls of the additive release elements 58 are frangible and surround the additive contents 59 until ruptured, e.g. by a compression.
  • the additive release elements 58 are preferably spherical, and may be formed by any suitable method.
  • the outer wall of the additive release component 55 is deformable, resiliently or plastically, to allow some of, and ultimately all, the additive release elements 58 to be compressed and ruptured within the additive release component 55 by successive compressions thereof.
  • the additive release elements 58 may all contain a single type of additive contents. Alternatively, the additive release elements 58 may contain a plurality of types of additive contents. At least one additive release element 58 contains a first type of additive, and at least one additive release element 58 contains a second, different, type of additive.
  • the different types may be different flavourants, or, one type may be a flavourant and another type may be an additive which is not a flavourant.
  • the first and/or second additive may be a flavourant (e.g.
  • the first and/or second additive may be any suitable further substance, for example, a substance that provides or creates a sensory effect (e.g., stimulating the trigeminal nerve) in a tobacco substitute or heat-not-burn product.
  • the first and second additives may be selected to react with each other to generate a third, different, substance.
  • the third substance may have a different effect than the first and second additives.
  • Embodiments of the invention are configured to comply with applicable laws and/or regulations, such as, by way of non-limiting example, regulations relating to flavours, additives, emissions, constituents, and/or the like.
  • applicable laws and/or regulations such as, by way of non-limiting example, regulations relating to flavours, additives, emissions, constituents, and/or the like.
  • the invention may be configured such that a smoking article implementing the invention is compliant with applicable regulations before release of an additive, after release of a first additive, and remains compliant after the release of one or more additional additives.
  • the generated substance complies with applicable laws/regulations.
  • Figures 8a and 8b show an additive release component 65 in a filter 60, according to a seventh embodiment of the invention.
  • the deformable additive release component 65 contains an additive, and is configured to release only a part of the additive contents when initially compressed.
  • the additive release component 65 is configured to provide a plurality of discrete deliveries of the additive contents, and may be configured according to any suitable type of additive release component described with respect to Figures 1 to 3 and as described above.
  • the filter 60 may form part of a smoking article when attached to a source of smokeable material.
  • the additive release component 65 is preferably substantially tubular, and extends longitudinally in the filter 60, surrounded by filtration material 62.
  • the additive release component 65 preferably has substantially hemispherical longitudinal ends.
  • the outer wall or shell may be substantially as described in any other embodiment.
  • the additive release component 65 has an aperture 67 through which the contents 69 can be released.
  • the aperture may be formed by a slit valve.
  • the outer wall may be provided with a narrow slit, which substantially prevents additive from exiting when the additive release component is not compressed. On compression of the additive release component, the deformation of the outer wall and/or pressure of the additive causes the slit to open, and additive to be ejected.
  • the slit valve closes when the compression ceases, allowing for a plurality of discrete deliveries.
  • the aperture 67 may be formed by a rupture of an area of weakness in the outer wall of the additive release component 65 when the additive release component 65 is compressed.
  • the aperture 67 is at a longitudinal end of the additive release component 65, and is preferably located on a central longitudinal axis. Part of the additive contents 69, preferably a fluid, is ejected from additive release component 65 on an initial partial compression, the rest during subsequent compressions.
  • One end of the additive release component 65 is received in a cup-shaped receptacle 66.
  • the receptacle 66 is open at an end facing the additive release component 65, and is configured to receive additive contents released through the aperture 67.
  • the receptacle 66 may be substantially rigid, and not deformable like the additive release component 65, or may be deformable.
  • Figure 8a shows the additive contents 69 being released on a compression
  • Figure 8b shows a reservoir of the fluid additive contents 69 that accumulates in the receptacle 66 after one or more compressions.
  • the outer wall or shell of the receptacle may be substantially as described in any other embodiment for an additive release component.
  • the release of the additive contents 69 from the receptacle 66 may be independent of the release of the additive contents 69 from the additive release component 65.
  • the additive contents 69 may only be released from the receptacle 66 with a mechanical movement of the filter which is distinct from the lateral compressions applied to release the additive contents 69 from the additive release component 65.
  • the mechanical movement may be, for example, a pull apart of the receptacle and additive release component 65, e.g. in a longitudinal direction, or a relative rotation (twisting).
  • a user can select a required amount of additive to be released, e.g.
  • the reservoir of additive contents 69 may be released from the receptacle 66 immediately, e.g. through a gap between the receptacle 66 and the additive release component 65.
  • a partial compression of the additive release component 65 causes release of a part of the additive into the receptacle 66, and also actuates subsequent release from the receptacle 66 by causing a separation between the additive release component 65 and receptacle.
  • a subsequent application of force to the additive release component 65 actuates a further discrete release of additive, via the receptacle.
  • FIG 9 shows an additive release component 75 in a filter 70, according to an eighth embodiment of the present invention.
  • the additive release component 75 comprises a plurality of additive release units, namely first additive release unit 75a and second additive release unit 75b.
  • the additive release component 75 comprises two additive release units 75a, 75b.
  • the additive release units 75a, 75b are separate components, preferably capsules, each containing an additive.
  • the additive release units 75a, 75b are configured to release only a part of their additive contents when compressed initially, the rest on subsequent compressions.
  • the additive release units 753 ⁇ 4 > 75b are configured to provide, independently, a plurality of discrete deliveries of their contents, and may be configured according to any type of additive release component described with respect to Figures 1 to 3.
  • the filter 70 may form part of a smoking article when attached to a source of smokeable material.
  • the additive release component 75 is preferably substantially tubular, and extends longitudinally in the filter 70, surrounded by filtration material 72.
  • the additive release units 75a, 75b are co-axially attached, and each is in the form of a tube extending longitudinally.
  • Each of the additive release units 75a, 75b preferably has a substantially hemispherical longitudinal end.
  • the additive release units 75a, 75b each have a respective aperture through which the contents 79 can be released, aperture 77a of the first additive release unit 75a is shown.
  • the aperture may be formed by a slit valve.
  • the outer wall may be provided with a narrow slit, which substantially prevents additive from exiting when the additive release component is not compressed.
  • the deformation of the outer wall and/or pressure of the additive causes the slit to open, and additive to be ejected.
  • the slit valve closes when the compression ceases, allowing for a plurality of discrete deliveries.
  • the aperture 77a may be formed by rupture of an area of weakness in the outer wall of the additive release component 75a when the additive release component 75a is compressed.
  • the aperture 77a is at a longitudinal end of the additive release component 75a, and is preferably located on a central longitudinal axis.
  • the aperture of the second additive release unit 77b is similarly located, facing in the opposite longitudinal direction.
  • a part of the additive contents 79a, 79b, preferably a fluid, is indicated as ejected from additive release units 75a, 75b on an initial compression, the rest on subsequent compressions. The additives of the additive release units 75a, 75b are released into different areas of the filter 70.
  • the additive release units 75a, 75b may contain different types of additive contents.
  • the first additive release unit 75a contains a first type of additive
  • the second additive release unit 75b contains a second, different, type of additive.
  • the different types may be different flavourants, or, one type may be a flavourant and another type may be an additive which is not a flavourant.
  • the additives in both of the additive release units 75a, 75b may be the same, and are released into different areas of the filter 70.
  • the first and/or second additive may be a flavourant (e.g. menthol), a cooling agent (e.g. menthol), or an additive which affects filtration properties (e.g. water or charcoal).
  • the first and/or second additive may be any suitable further substance, for example, a substance that provides or creates a sensory effect (e.g., stimulating the trigeminal nerve) in a tobacco substitute or heat-not-burn product.
  • the first and second additives may be selected to react with each other to generate a third, different, substance.
  • the third substance may have a different effect than the first and second additives.
  • Figures 10a and 10b show an additive release component 101 according to a ninth embodiment of the current invention.
  • the additive release component comprises an outer wall section 102 and an inner wall section 103 connected in the illustrated embodiment by two bridging structures 104 positioned at one end of the wall sections.
  • the inner wall section 103 defines a chamber 107 for containing additive.
  • There is a gap between the inner and outer wall sections forming a generally annular channel 105 through which air and/or smoke may flow through the additive release component.
  • a filling aperture 106 is formed by the open end of the inner wall section, forming an opening in the chamber 110 holding the additive. This filling aperture 106 is closed by a sealing structure 107 which is in the form of a cap fitted over and into the aperture.
  • the sealing structure 107 includes a release aperture 108 which is sealed by a sealing sheet 109 attached to the end of the sealing structure 107 and covering the release aperture 108. This sealing sheet 109 is removed or ruptured when the additive release component is actuated and the force applied to the outer wall section 102 is transmitted via the bridging structures 104 to the inner wall section 103 and the sealing structure 107.
  • the filling aperture 106 is sealed by the sealing structure 107 after additive has been inserted into the chamber 110 of the additive release component 101 through the filling aperture 106.
  • the sealing structure 107 may be held in position by any means. For example, it may be wet sealed or may held by friction-fit. As a result, additive is initially prevented from being released from the component 101.
  • Additive may be released from the component, however, when the additive release component 101 is actuated by a first application of a compressive force by the user of the smoking article.
  • the application of compressive force compresses the outer wall section 102 of the component.
  • the force of the additive and/or the deforming of the sealing structure 107 rupture the sealing sheet 109 which is positioned over the release aperture 108 in the sealing structure 107. This opens the release aperture 108 in the sealing structure 107, allowing a portion of the additive to leave the additive release component 101.
  • the resiliently deformable additive release component 101 When compressive force is no longer applied, the resiliently deformable additive release component 101 returns to its original shape and size. This leads the sealing sheet 109 to partially re-seal the release aperture 108 of the sealing structure 107. This reduces or preferably stops the release of additive. Further actuation of the additive release component by a further application of a compressive force will lead to the re- opening of the release aperture 108 in the sealing structure 107, allowing the release another discrete delivery of additive. This may be repeated until there is substantially no more additive left in the component for release.
  • the additive may be incorporated into the component via the same aperture(s) through which it then is released from the component following actuation.
  • the additive release component may include multiple release apertures and/or multiple filling apertures.
  • Figures na and lib show an alternative additive release component in according to the ninth embodiment.
  • the component in is resiliently deformable and is configured to release one of a plurality of discrete deliveries of additive when compressive force is applied as indicated by the arrows.
  • the additive release component in comprises an outer wall section 112 and an inner wall section 113 connected together by bridging structures 114.
  • the inner wall section 113 defines a chamber for containing additive.
  • a slit valve 118 At the other end of the component 111, there is provided a slit valve 118.
  • the slit valve is a slit which forms a release aperture in the chamber. The slit may be sealed by heat sealing the edges to one another.
  • the valve may be sealed and/or covered by a sheet of rupturable material (not shown).
  • additive is inserted into the chamber of the additive release component 111 through the filling aperture. Thereafter, the filling aperture is covered and/or sealed by the addition of the sealing structure 117, such as a cap which may be sealed onto or into the filling aperture, as shown in Figure 11a.
  • the sealing structure may be sealed using any suitable sealing method, for example, heat sealing, wet sealing, or sealing by ultra-sonic welding.
  • additive release component 111 After manufacture, additive is initially not able to leave the additive release component 111. Both the filling aperture and the release aperture 118 are sealed, as shown in Figure lib. Additive may be released from the component, however, when the first compressive force is applied to the outer wall 112 as indicated by the arrows in Figure lib. The outer wall section 112 is compressed and the compressive force is transferred to the inner wall section 113 via the bridging structures 114, forcing the release aperture 118 open. As the slit valve opens, any seal or cover is ruptured. When the compressive force is no longer applied, the additive release component 111 reverts to its original shape and size. This pulls the sides of the slit valve together, effectively sealing it once again.
  • the resilient nature of the material surrounding the release aperture 118 helps to seal the aperture when no compressive force is being applied. The release of additive is thereby prevented. Compressive force may be applied again to release another discrete delivery of additive, and this may be repeated until there is substantially no more additive left in the component for release.
  • the additive release component according to any of the embodiments described herein may, for example, be injection moulded, and may be injection moulded using, for example, polyvinyl alcohol (PVOH) and/or polyethylene (PE).
  • PVOH polyvinyl alcohol
  • PE polyethylene
  • the component may also comprise other or further materials, and may be formed by other manufacturing processes.
  • Figures 12a, 12b, 12 c, and I2d show a further example of an additive release component 200, according to a tenth embodiment.
  • the additive release component 200, according to a tenth embodiment.
  • the 200 includes a body 201 and an additive 202.
  • the additive 202 may include a fluid, a powder or any other suitable additive material.
  • the body 201 is formed from a flexible material, preferably a polymeric material such as polyvinyl alcohol (PVOH).
  • PVOH polyvinyl alcohol
  • 201 includes a tubular section 201a having a first end section 201b at one of its ends and a second end section 201c at the other of its ends.
  • the first end section 201b includes an end wall which closes one end of the tubular section 201a. This end wall is preferably rounded.
  • the tubular section 201a may be substantially cylindrical towards the first end section 201b and the first end section 201b may include a substantially hemispherical end wall, as shown.
  • the walls of the tubular section 201a are distorted to form a closure at the second end section 201c.
  • wall sections corresponding to two opposing halves of the tubular section 201a are flattened and brought into contact, wherein the area of contact is a substantially flat rectangular area.
  • the two wall sections may be joined together in any suitable way, as will be explained below.
  • the first end section 201b includes one or more weakened regions 203.
  • the weakened regions 203 are preferably areas where the wall at the first end section 201b is thinner than it is anywhere else in the body 201. These thinned areas are preferably formed from recesses in the inner surface of the wall.
  • the weakened regions 203 are preferably arranged so that they face at least partly in an axial direction along the axis of the tubular section 201a. However, they may be arranged to face in any one or more directions. There are preferably a plurality of weakened regions 203, for instance four weakened regions 204.
  • Such a plurality of weakened regions 203 may be arranged such that they are equidistant from the axis of the tubular section 201a and equally spaced from one another, as shown in Figures 12a, 12b, 12c, and I2d.
  • the weakened regions 203 are preferably circular, although they may be any suitable shape.
  • the additive release component 200 may be made by the following process.
  • the unsealed body i.e. the body 201 without the second end section 201c, is first moulded using any suitable process.
  • the un-sealed body is then filled with the additive 202, which may involve holding the un-sealed body vertically with its open end facing upwards.
  • the un-sealed body is then sealed by distorting and then joining together walls sections of the tubular section 201a, thereby forming the second end section 201c.
  • the wall sections may be joined together by heat sealing, ultrasonic welding, water bonding or any other suitable process.
  • One or more of the additive release components 200 may be into any of the exemplary smoking articles and/or filters described herein.
  • the additive release component 200 is configured to contain the additive 202 until the additive is released by the smoker.
  • the component 200 In response to pressure applied to the component 200, for example by the smoker squeezing the outside of a filter into which it is incorporated, the component 200 is configured to rupture in the weakened regions 203. The additive 202 is then forced out of the component 200 through the ruptured regions 203.
  • the additive can be released at a defined position and/or in a defined direction. This depends on the arrangement of the weakened regions 203 in the component 200 and the arrangement of the component 200 in the filter.
  • the component 200 can be aligned with the longitudinal axis of the filter and can have weakened regions at either end so that the additive 202 is released towards either the tobacco end and/or the mouth end of the filter.
  • the additive release component 200 may be formed in alternative ways. For example, instead of having a one-piece body 201, it may be formed from two similar parts. These parts may each have a tubular region and an end section that are similar to the tubular region 201a and the first end section 201b, respectively. These parts may be joined together by any of the above-described processes.
  • Figure 13 shows an assembly 80 comprising a plurality of additive release components 85 during manufacture.
  • the additive release components 85 may be substantially as described in any other embodiment.
  • the additive release component 85 is formed containing an additive, according to any suitable method, examples of which are described below.
  • the assembly 80 comprises additive release components 85 connected together in an elongate chain, with longitudinal ends attached to adjacent additive release components 85.
  • the elongate additive release components 85 have a longitudinal axis extending parallel to the longitudinal axis of the assembly 80.
  • An additive release component 85a being formed is held between first and second pairs of retaining members or pinches 82, 84.
  • the first pair of retaining members 82 holds or defines a first longitudinal end of the additive release component 85a.
  • the second pair of retaining members 84 is shown separated, prior to compressing a second
  • the additive is located in a tube of outer shell material, which is arranged substantially vertically.
  • the seal is preferably a heat seal.
  • Formed additive release components 85 are shown connected to each other and the partially formed additive release component 85a by a web 86.
  • the web 86 may be formed by connected flanges 34, as described with respect to Figure 3.
  • the tube is then cut into individual units through the seal at a station further downstream.
  • the additive release component may be formed by a blow-fill-seal method.
  • An elongate tube of material for forming the outer tube is formed, preferably by extrusion.
  • a gas is blown into the tube through a needle, in order to inflate the tube and form the outer shell.
  • the additive is inserted through a needle into the outer shell.
  • the outer shell is then sealed to form a completed additive release component.
  • the blow-fill-seal method may be used for any embodiment for which it is suitable.
  • the additive release component may be formed by a bag-fill-seal method.
  • the outer shell is formed by any known method. For example, two half bags may be stamped out and connected, e.g. by welding. Alternatively, two sheets may be heat sealed together. The additive is inserted into the outer shell, and the outer shell sealed.
  • the additive release component may be formed by freezing the additive, e.g. a solution of menthol in water, and subsequently coating this with material for the outer wall, e.g. gelatin.
  • the additive release component may be formed by co-extrusion or any other suitable method.
  • Figure 14 shows a first method of forming a plurality of filters 90 according to the present invention.
  • a plurality of additive release components 85 of any type or embodiment are provided, connected together in a chain 80 extending parallel with the longitudinal axes of the additive release components 85.
  • the additive release components 85 are inserted into a rod of filtration material 82 to form a plurality of filters.
  • the chain 80 is inserted in a direction substantially parallel to a longitudinal axis of the filtration material 82 and the chain 80.
  • the additive release components 85 are inserted into filtration material during forming of the filtration material into a cylindrical rod.
  • filter tow is drawn from a source of tow (not shown), and is compressed through a nozzle (not shown) and through a tongue of a garniture (not shown).
  • the chain 80 is drawn from a reel or hopper (not shown) and fed through the tongue so as to incorporate the chain 80 into the flow of tow.
  • the chain 80 is a string of additive release components to be located within strands of filtration material tow.
  • the tongue is configured such that the additive release components 85 are centrally disposed inside the eventual rod.
  • the tow and the chain 80 therein are wrapped in a plug wrap (not shown), so as to form an elongate filter rod.
  • An endless garniture tape (not shown) travels along a garniture bed, and drags the plug wrap, the tow, and the chain 80 through the garniture.
  • the garniture tape curves inwardly as it travels through the garniture, thereby shaping the plug wrap such that the tow and chain 80 therein are cylindrically paper wrapped.
  • An adhesive such as hot melt glue or polyvinyl acetate (PVA) is applied to the plug wrap. Further details of the method of manufacturing are described in WO2010/03899, which is incorporated herein by reference.
  • Figure 15 shows a second method and arrangement of forming filters 95 according to the present invention.
  • the additive release components 85 of any embodiment or type are arranged in a stack 97 extending substantially perpendicularly to the longitudinal axes of the additive release components 85 in the stack.
  • the additive release components 85 may be connected together in the stack 97, or may be individually retained in the stack by a retaining assembly (not shown).
  • the additive release components 85 are fed consecutively into filtration material, and the filtration material is then closed around the additive release components 85.
  • the method is substantially as described above, and with reference to WO2010/03899, except with the additive release components 85 fed in substantially perpendicularly to the axis of the filter formed.
  • Figures 16 and 17 show a third method of manufacturing a plurality of additive release components, and an apparatus, according to any one of the first to third type as described above.
  • the method of manufacturing comprises forming substrates containing additive in a first apparatus 301.
  • the method comprises dipping one or more open cell substrates 314 into a bath 320 of fluid additive.
  • the substrates 314 are attached to a support 310, preferably hanging in an array.
  • the substrates 314 are lowered on the support into the fluid additive bath 320 until the substrates 314 are immersed to the required level in the additive fluid.
  • the support 310 is then raised, with the substrates 314 having absorbed fluid additive.
  • Figure 17 shows the substrates 314 containing additive are then provided with an outer shell in apparatus 302.
  • the substrates 314 are coated in an outer shell material, for example, gelatin.
  • the substrates 314 are dipped into a bath 330 of fluid outer shell material.
  • the substrates 314 are lowered on the support into the outer shell material bath 330 until the substrates 314 are fully immersed in the fluid.
  • the support 310 is then raised, with the substrates 314 having been coated in the outer shell material to form additive release components 315.
  • the outer shell material may be dried or treated to form a solid outer shell which is frangible, resiliently deformable or plastically deformable.
  • the additive release components 315 may be introduced into filtration material to form a filter by any suitable known method.
  • FIGS. 18 and 19 show a fourth method and apparatus 401 for forming filters according to any embodiment of the present invention.
  • a substrate 415 containing additive is in the form of a continuous elongate rod for forming a plurality of substrates.
  • the substrate 415 may correspond to any type of additive release component having a substrate, in particular, the fourth type of closed cell matrix substrate, i.e. closed cell foam.
  • the substrate 415 may alternatively be an open cell type substrate as described above.
  • the substrate rod is produced by extrusion, preferably on line.
  • the apparatus 401 comprises a first filtration material source 412a for providing first filtration material 413a and a second filtration material source 412b for providing second filtration material 413b.
  • First filtration material 413a from the first filtration material source 412a is brought into contact with the substrate 415 by one or more rollers 414a.
  • Second filtration material 413b from the second filtration material source 412b is brought into contact with the substrate 415 by one or more rollers 414b.
  • the first and second filtration material 4i3a,4i3b surrounds the substrate 415.
  • the first and second filtration material 4i3a,4i3b is formed around the substrate with a substantially cylindrical exterior surface, defined by a guide 420.
  • the guide 420 is shown split into two parts, and is configured to form a cylindrical elongate filter rod 417 comprising the centrally located substrate 415 and surrounded by filtration material.
  • FIG 19 shows a further step in the process of manufacturing filters, started in Figure 18.
  • the elongate filter rod 417 comprises the substrate 415 surrounded by the filtration material 4i3a,4i3b.
  • the filter rod 417 is wrapped in a covering layer 416.
  • the covering layer 416 may be secured around the filtration rod 417 by a longitudinal seam of adhesive joining opposite edges.
  • the wrapped filter rod is then cut laterally by a cutting means (not shown) into a plurality of individual filter sections.
  • Each filter section may be suitable for a single smoking article. Alternatively, each cut filter section may be suitable for two smoking articles which are formed together, and then later cut into individual filter sections.
  • the filter sections formed may be attached to one or more further filter sections to form a filter according to any embodiment of the present invention.
  • the continuous rod of substrate containing additive may be cut into discrete sections, forming discrete additive release components.
  • the discrete additive release components are inserted individually into the filtration material.
  • the substrate 415 as described may not be a continuous elongate rod of substrate.
  • the substrate 415 may be a plurality of discrete additive release components, which are connected by a web.
  • the web may be formed of outer shell material.
  • the additive release components may be formed close together, for example, by co-extrusion.
  • the outer shell material does not separate between the components, due to the close formation of the components, forming a connecting web.
  • the filter has been described as having a covering layer with one or more transparent windows. Alternatively, the covering layer 16 may not have a transparent window, and may be opaque over the whole exterior surface.
  • a known smoking article may have a filter diameter which is approximately 5.4mm, which may be known as a superslim.
  • a conventional spherical capsule may have a diameter which is a large proportion of the cross-sectional area of the filter. The capsule may cause an adverse effect on smoke flow rate and/or pressure drop.
  • the additive release component of the present invention may have a relatively small diameter, such that the effect of the additive release component on the properties of the filter is reduced.
  • the additive release component is elongate, instead of spherical, such that a sufficient quantity of additive is contained.
  • the maximum lateral dimension of the additive release component is less than 3.5mm, and preferably between 2.2mm and 2.8mm.
  • the additive release component has a length between 7mm and 11mm, and more preferably, 8mm to 10mm, and more preferably approximately 9mm.
  • the diameter of the filter 20 is within the range 4 to 10 mm.
  • the exterior diameter of the additive release component of any type or embodiment is preferably within the range 1.5 - 4.5 mm, and more preferably less than 3.5mm, or between 2 to 3mm.
  • the additive release component diameter is between 2.2mm and 2.8mm, and is preferably approximately 2.5mm.
  • the additive release component may have an exterior length between 3mm and 15mm, and preferably, between 5mm and 7mm, or between 5mm and 6mm.
  • the additive release component length is approximately 5.5mm.
  • the length of the additive release component is between 7mm and 11mm, and more preferably, 8mm to 10mm, and more preferably approximately 9mm.
  • the additive release component diameter is between 2.2mm and 2.8mm, and is preferably approximately 2.5mm.
  • the length of the additive release component is between 11mm and 15mm, and more preferably between 12 and 14mm, and preferably approximately 13.6mm.
  • the additive release component diameter is between 2.2mm and 2.8mm, and is preferably approximately 2.5mm. These dimensions may apply to any type of additive release component.
  • the larger length additive release component may, in particular, be used with an additive release component comprising a substrate.
  • the substrate may contain approximately 40% of additive by volume.
  • the diameter and length of the additive release component determines the maximum volume of additive which can be contained. Therefore, the selection of a relatively small diameter is used in combination with a relatively high length in order to contain a required quantity of additive. Any combination of dimensions, including dimensions outside of the ranges indicated, may be used.
  • the outer shell of any embodiment of additive release component may have a thickness of approximately 0.2mm.
  • the smoking article may comprise one or more additive release components that are arranged to directionally release additive towards a particular region of the smoking article or smoking article filter, which may be any region of the smoking article or smoking article filter.
  • This region to which additive is directed may comprise a material which is activated by the additive released from the additive release component.
  • this material may comprise a solid that is active when in the liquid state, and is thus activated by the action of additive in the form of water or a specific solvent.
  • the target region of directional additive release may be a cavity within the centre of the filter, which may or may not comprise other active materials.
  • the cavity may comprise crystalline flavourant, which may be activated when additive in the form of a solvent is directionally released into the cavity to contact the crystals.
  • the cavity may comprise a material which is sensitive to additive in the form of water, for example, a material which in contact with water changes colour, dissolves, makes a sound, emits a flavour or an odour, etc.
  • the particular region to which additive is directed may be a region of filter material comprising a solid material in the form of small granules evenly distributed within the material.
  • Such an arrangement may be useful, for example, when a granular crystalline flavourant is to be used in combination with an additive release component comprising a solvent additive.
  • a plurality of additive release components may be used, from which additive may be sequentially released to provide flavourant over the duration of use of the smoking article.
  • additive may be directed into the same or different regions of the granule-containing filter material.
  • the region to which additive is directed may be a peripheral region of the smoking article or smoking article filter, such as a region at or near the circumferential surface of the smoking article, or at the mouth end of the filter.
  • Such an arrangement may be suitable, for example, when the additive is coloured, to provide an interesting appearance to the smoking article, and/ or to provide a visual indication that the additive has been released, for example, where the additive release component comprises a combination of coloured and colourless additives.
  • This arrangement may also be suitable when the additive is an odorant, to facilitate diffusion of the odour out of the smoking article.
  • a smoking article or smoking article filter may comprise two or more additives, each carried within a separate additive release component. This arrangement may be suitable, for example, when the two or more additives chemically react, or where the additives are subject to oxidation, diffusion, or other means of loss of intensity over time.
  • the two or more additive release components may be arranged to directionally release additive towards each other. Such an arrangement may be useful, for example, where the additives chemically react, such as to produce an exothermic or endothermic reaction, or a reaction in which an odour or a gas is evolved, or a colour or other visual effect is produced.
  • the two or more additive release components may be arranged to directionally release additive towards a common region of the filter. This may be suitable where a significant quantity of additive is required to be supplied to a particular region of the filter, for example, where the additive is water, and the target region of the filter comprises a water sensitive material, such as a water swellable, water soluble, or water degradable material. Since the additive release components of the invention are designed to directionally release additive, then the orientation in which the additive release component is inserted into the smoking article or smoking article filter should be controlled.
  • the outer shell may be formed of gelatine.
  • an additive release component may be manufactured by a known co-extrusion process. In the co-extrusion process, two fluids may be extruded together so that an additive release component is created by surface tension.
  • a soft-gel process may be used, which is known for making soft-gel type capsules.
  • the additive release components may be manufactured by a known co-extrusion process, for a capsule size of 5 ⁇ to 10 mm. In the co- extrusion process, two fluids may be extruded together so that an additive release component is created by surface tension.
  • the shell fluid may be a warm gelatin solution, and liquid contents, e.g. menthol, are respectively delivered under pressure from separate tanks into a two-fluid nozzle.
  • the shell fluid and liquid contents flow from a nozzle where they form droplets in a carrier fluid, the droplets having an outer shell of shell fluid and an inner core of liquid contents.
  • a cooling mechanism is provided to cool and solidify the shell fluid.
  • the shell material may be alginate, agar-agar, gum arabicum, latices or waxes.
  • the additive release components may be formed by any suitable process for encapsulating a fluid (liquid).
  • the capsules may be formed by interfacial polymerisation, which may produce a capsule size of ⁇ .2 ⁇ to a few millimetres.
  • the shell may be made of a polymer, for example, polyester, polyamide, polyurea, polyurethane, or a biodegradable polymer e.g. protein, polysaccharides or oligosaccharides.
  • the additive release components may be formed by complex coacervation, which may produce a particle size of ⁇ to a few millimetres.
  • the outer shell may be made from gelatine and gum arabic.
  • the additive release components may be formed by single extrusion, which may produce a particle size of 200 ⁇ to a few millimetres.
  • the shell may be made from alginate, chitosan, carrageenan, cellulose derivatives, or waxes.
  • the additive release components may be formed by melt extrusion, which may produce a particle size of 3 ⁇ to a few millimetres.
  • the shell may be made from gelatine, sugars, maltodextrins, corn syrup, food polymers or modified starches.
  • the additive release components may be formed by melt injection, which may produce a particle size of 200 ⁇ to a few millimetres.
  • the shell may be made from carbohydrate materials, e.g. sucrose, glucose syrups and modified starches.
  • the additive release components may be formed by a spray drying microencapsulation process, which may produce a particle size of ⁇ to a few millimetres.
  • the capsule shell may be made from polysaccharides (starch, alginate, agar, pectin, carrageenan, gums), proteins (gelatine, casein), fats and fatty acids, cellulose derivatives, lipids (waxes, shellac, carnuba or beeswax).
  • the additive release component is preferably located in a filter, within filtration material.
  • the additive release component may be located in a tobacco rod.
  • the additive release component may be located in a separate section of the smoking article, not surrounded by filtration material.
  • the additive release component may be located in a separate section located between the tobacco rod and filter.
  • the filter may comprise a reaction surface against which the additive release component can be urged, in order to facilitate release of additive.
  • the additive release components may be located on a periphery of the filter.
  • the radially adjacent filtration material may provide a reaction surface against which the additive release component can be urged.
  • the filtration material may be relatively hard (e.g. by containing an increased amount of plasticiser) to form the reaction surface, and may have a hardness on the Filtrona scale of more than 90%.
  • the additive release components may be located within the filtration material, or may be located in a cavity adjacent to the filtration material.
  • the cavity may be formed by an elongate inner rod of filtration material, which one or two annular outer sections of filtration material surround. A covering layer forming an exterior of the filter is attached to one or both of the outer sections of filtration material, and spaced from the inner rod to define a cavity.
  • the inner rod is harder than the annular outer sections, optionally by containing more plasticiser.
  • the additive release components may be individually attached to the filter or substrate.
  • the additive release components may be connected by a web, and may be connected between laminated strips of sheet material.
  • the strips of sheet material may form the additive release components, such that the additive release components do not have a separate outer shell, and the strips of sheet material contain the additive.
  • the additive release components have been described as manually manipulated to release the additive.
  • a movable part may be configured such that movement of the movable part around an exterior of the smoking article releases additive from at least one of the additive release components. The movement is preferably sliding or rotation, by a ring or C-shaped clip, over an external surface of the filter.
  • the filter may provide a reaction surface, against which the additive release components are urged by the movable part.
  • the additive release components may be located in one or more grooves, extending circumferentially, longitudinally or helically.
  • the movable part comprises a covering layer defining two adjacent surfaces, wherein the additive release components are located between the adjacent surfaces such that relative movement of the adjacent surfaces of the covering layer releases additive from at least one of the additive release components.
  • the elongate additive release component preferably has a circular or elliptical cross- section, and contains more additive than an additive release component of the same diameter.
  • the elongate additive release component may have a maximum lateral extent of less than 3.5mm, or less than 3mm, or from 2mm to 3mm.
  • the elongate additive release component may have a radial cross-sectional area which is less than 50% of the radial cross-sectional area of the smoking article, and optionally, less than 40% or less than 30%.
  • Such an additive release component is optimised for use in a small diameter smoking article, e.g. having a diameter of 5mm to 6mm, or 6mm to 7mm.
  • the additive release components have been described as individually located in the smoking article.
  • a plurality of the additive release components may be surrounded by an outer wall or outer encapsulation.
  • the outer encapsulation may be porous or configured to rupture or deform to allow release of additive on compression.
  • the outer encapsulation may itself be contained within a further encapsulation.
  • One or more additive release components may be affixed to an exterior of a substantially larger additive release component.
  • a plurality of additive release components, of the same or different sizes, may be affixed together. Any of these embodiments may be considered as a plurality of components connected in a unitary structure.
  • the additive released from the additive release components has been described as being entrained by ventilating air and/or gaseous flow from the tobacco rod.
  • flow containing additive may be selectively released from the filter.
  • the filter comprises a selecting means, preferably in the form of a movable element, preferably rotatable, at a mouthpiece end of the filter.
  • the selecting means at least a part of which is movable in relation to the first and second flow paths, is configured to select a first flow path, a second flow path, or optionally, an adjustable proportion of the first and second flow paths.
  • the first flow path may correspond to an annular, radially outer flow path
  • the second flow path may correspond to a radially inner flow path within the first flow path.
  • first and second half-cylindrical filter parts respectively define the first and second flow paths, the first and second filter parts arranged together to form a cylindrical filter part.
  • the additive may be initially encapsulated within one or more additive release components (i.e. capsules), prior to being selectively released.
  • the additive release component is preferably located in a filter, within filtration material.
  • the additive release component may be located in a tobacco rod.
  • the additive release component may be located in a separate section of the smoking article, not surrounded by filtration material.
  • the additive release component may be located in a separate section located between the tobacco rod and filter.
  • any materials for the additive release components or filter comply with and/or are subject to applicable regulatory requirements/approvals.
  • Embodiments of the invention may be configured to comply with applicable laws and/ or regulations, such as, by way of non-limiting example, regulations relating to flavours, additives, emissions, constituents, and/or the like.
  • the invention may be configured such that a smoking article implementing the invention is compliant with applicable regulations before and after manipulation or release of an additive by a user.
  • the implementation is such that a smoking article meets or exceeds required regulatory test(s) in all user-configurable positions, such as, by way of non- limiting example, the testing threshold(s)/ceiling(s) for cigarette emissions and/or smoke constituents.
  • Any of the features described in any embodiment may be used in combination with any other features of any other embodiment.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
PCT/GB2012/051033 2011-05-13 2012-05-11 An additive release component, a filter for a smoking article, a smoking article and a method of manufacturing WO2012156689A2 (en)

Applications Claiming Priority (2)

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GBGB1108025.6A GB201108025D0 (en) 2011-05-13 2011-05-13 An additive release component, a filter for a smoking article, a smoking article and a method of manufacturing
GB1108025.6 2011-05-13

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PCT/GB2012/051043 WO2012156699A1 (en) 2011-05-13 2012-05-11 Additive release component
PCT/GB2012/051033 WO2012156689A2 (en) 2011-05-13 2012-05-11 An additive release component, a filter for a smoking article, a smoking article and a method of manufacturing

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CN110279146A (zh) * 2014-02-26 2019-09-27 菲利普莫里斯生产公司 具有带有易碎壳的液体释放组分的吸烟制品
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WO2014156838A1 (ja) * 2013-03-26 2014-10-02 日本たばこ産業株式会社 喫煙物品用の付加部材及びこれを搭載した喫煙物品
US10182594B2 (en) 2013-12-31 2019-01-22 Philip Morris Products S.A. Smoking article with dual additive delivery system
CN110279146A (zh) * 2014-02-26 2019-09-27 菲利普莫里斯生产公司 具有带有易碎壳的液体释放组分的吸烟制品
WO2016092295A1 (en) * 2014-12-08 2016-06-16 British American Tobacco (Investments) Limited A smoking article, a smoking article filter section and a method of manufacturing a smoking article
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CN110392533A (zh) * 2017-04-03 2019-10-29 菲利普莫里斯生产公司 被配置成收纳插入单元的吸烟制品衔嘴
WO2018185014A1 (en) * 2017-04-03 2018-10-11 Philip Morris Products S.A. Smoking article mouthpiece configured to receive an insert unit
RU2765900C2 (ru) * 2017-04-03 2022-02-04 Филип Моррис Продактс С.А. Мундштук курительного изделия, выполненный с возможностью размещения вставного элемента
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CN110392533B (zh) * 2017-04-03 2022-04-08 菲利普莫里斯生产公司 被配置成收纳插入单元的吸烟制品衔嘴
WO2018215781A1 (en) * 2017-05-24 2018-11-29 Elucid8 Holdings Ltd. Tobacco-containing consumable for aerosol generating devices
KR20200031079A (ko) * 2017-05-24 2020-03-23 엘루시드8 홀딩스 엘티디. 에어로졸 발생 장치를 위한 담배 함유 소모품
RU2769811C2 (ru) * 2017-05-24 2022-04-06 Элюсид8 Холдингс Лтд. Расходуемое изделие, содержащее табак, для образующих аэрозоль устройств
KR102692206B1 (ko) * 2017-05-24 2024-08-06 엘루시드8 홀딩스 엘티디. 에어로졸 발생 장치를 위한 담배 함유 소모품
US11576429B2 (en) 2017-08-16 2023-02-14 British American Tobacco (Investments) Limited Flavour system
CN108402518A (zh) * 2018-03-29 2018-08-17 云南中烟工业有限责任公司 一种可旋转释放内容物的胶囊及包含该胶囊的滤嘴
CN108402518B (zh) * 2018-03-29 2023-10-20 云南中烟工业有限责任公司 一种可旋转释放内容物的胶囊及包含该胶囊的滤嘴

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WO2012156700A1 (en) 2012-11-22
WO2012156699A1 (en) 2012-11-22
WO2012156689A3 (en) 2013-04-25
GB201108025D0 (en) 2011-06-29
AR086378A1 (es) 2013-12-11

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