US20150150302A1 - Blended rods for use in aerosol-generating articles - Google Patents

Blended rods for use in aerosol-generating articles Download PDF

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Publication number
US20150150302A1
US20150150302A1 US14/402,482 US201314402482A US2015150302A1 US 20150150302 A1 US20150150302 A1 US 20150150302A1 US 201314402482 A US201314402482 A US 201314402482A US 2015150302 A1 US2015150302 A1 US 2015150302A1
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United States
Prior art keywords
tobacco material
aerosol
sheet
tobacco
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/402,482
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English (en)
Inventor
Alessandro Metrangolo
Pierre-Yves Gindrat
John Faulkner
Jean-Pierre Schaller
Jean-Claude Schneider
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Philip Morris Products SA
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Philip Morris Products SA
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Publication date
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Assigned to PHILIP MORRIS PRODUCTS S.A. reassignment PHILIP MORRIS PRODUCTS S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHALLER, JEAN-PIERRE, FAULKNER, JOHN, GINDRAT, PIERRE-YVES, METRANGOLO, Alessandro, SCHNEIDER, JEAN-CLAUDE
Publication of US20150150302A1 publication Critical patent/US20150150302A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/10—Devices with chemical heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B13/00—Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff
    • 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
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
    • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
    • 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
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
    • A24B15/165—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes comprising as heat source a carbon fuel or an oxidized or thermally degraded carbonaceous fuel, e.g. carbohydrates, cellulosic material
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/01—Making cigarettes for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1828—Forming the rod by cutting tobacco sheet material
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/22—Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/60—Constructional details
    • A24F47/004—
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/06—Inhaling appliances shaped like cigars, cigarettes or pipes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1821—Forming the rod containing different tobacco mixtures, e.g. composite rods
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • the present specification relates to rods comprising two or more sheets of tobacco material gathered together to form a rod for use in aerosol-generating articles.
  • the specification also relates to aerosol-generating articles comprising such rods, and methods for forming such rods.
  • Processes and apparatus for producing shreds, strands or strips of tobacco material are known in the art.
  • the width of such shreds, strands and strips of tobacco material is about 3 mm or less.
  • U.S. Pat. No. 4,000,748 discloses a process and apparatus for shredding a sheet of reconstituted tobacco into strips and crimping the resultant strips in a substantially simultaneous operation.
  • the sheet of tobacco material is moved between a pair of rotating and intermeshing stacks of disks which shred the sheet into a plurality of strips about 0.65 to 1.55 mm in width.
  • the forward motion of the resultant strips is retarded by engagement with facing surfaces of neighbouring disks causing a buckling of the strips into a crimped configuration.
  • the crimped strips are reported to provide an increase in fill value.
  • rods for aerosol-generating articles comprising crimped or uncrimped shreds of tobacco material suffers from a number of disadvantages including those discussed below.
  • shredding tobacco material undesirably generates tobacco fines and other waste.
  • rods comprising shreds of tobacco material exhibit ‘loose ends’. That is, there is a loss of shreds of tobacco material from the ends of the rod. This is exacerbated by breakage of the shreds of tobacco material during rod formation. Loose ends are not only aesthetically undesirable, but can also disadvantageously lead to the need for more frequent cleaning of manufacturing equipment and aerosol-generating devices. The problem of loose ends is particularly exacerbated in aerosol-generating articles, because the rod length of aerosol-generating substrate tends to be low in comparison with conventional cigarettes, and therefore the proportion of substrate material that is in proximity to an end is greater.
  • rods comprising shreds of tobacco material exhibit high weight standard deviations. That is, rods of the same dimensions tend to be of inconsistent weight. This is due in part to the tendency of the rods to exhibit loose ends as mentioned above.
  • the high weight standard deviation of rods comprising shreds of tobacco material leads to an undesirably high rejection rate of rods whose weight falls outside of a selected acceptance range.
  • rods comprising shreds of tobacco material exhibit non-uniform densities. That is, the density along the rod length of the rod tends to be inconsistent. This is due to variations in the quantity of tobacco material at different locations along the rod, which results in ‘voids’, which are regions having reduced quantities of tobacco material, and ‘pads’, which are regions having increased levels of tobacco material.
  • the non-uniform density of rods comprising shreds of tobacco material can undesirably affect the resistance to draw (RTD) of the rods.
  • RTD resistance to draw
  • the non-uniform density of rods comprising shreds of tobacco material can lead to loose ends when a void is located at the end of the rod.
  • Rods of short rod length are sometimes referred to as plugs.
  • tobacco there are many types of tobacco and many ways in which two tobacco types may differ. For example, different types of tobacco may derive from different tobacco plant varieties, or from different portions of a tobacco plant. Tobaccos may differ if they have been processed in different ways in order to vary certain characteristics. Tobaccos may differ if they comprise different additives, or different proportions of additives.
  • Aerosol-generating articles such as traditional lit-end cigarettes, typically comprise blended tobacco.
  • Blended tobacco typically comprises shreds and strips of many different types of tobacco leaf and homogenised tobacco. Properties of the cigarette such as flavour or perceived harshness may be controlled by blending many different types of tobacco.
  • EP-A1-2 062 484 discloses a process for forming smokeless tobacco articles for oral consumption.
  • a sheet of reconstituted tobacco is gathered into a rod, wrapped, and cut into pieces suitable for oral consumption.
  • rods comprising tobacco material for use in aerosol-generating articles.
  • a rod may be provided comprising a first sheet of tobacco material and at least one continuous element of tobacco material gathered together with the first sheet of tobacco material and circumscribed by a wrapper, the rod including a first sheet of a first tobacco material and a continuous element of a second tobacco material, the second tobacco material being chemically different to the first tobacco material.
  • the continuous element may comprise a different blend of tobacco or a different type of tobacco compared to the first sheet.
  • the continuous element may comprise a different aerosol-former compared to the first sheet.
  • the continuous element may comprise a different proportion of aerosol-former compared to the first sheet.
  • a continuous element of tobacco material may be in the form of a ribbon, strip, yarn, tape, filament, thread, or other elongate element.
  • the continuous element of tobacco material may be a second sheet of tobacco material.
  • a rod may be provided comprising at least two sheets of tobacco material gathered together and circumscribed by a wrapper, the rod including a first sheet of a first tobacco material and a second sheet of a second tobacco material, the second sheet of the second tobacco material being physically or chemically different to the first sheet of the first tobacco material.
  • the two sheets may be physically different if they have different physical dimensions, different surface textures, different morphologies, different densities, or different porosities.
  • Sheets may be textured by crimping and the crimping of one sheet may be of a different degree to the crimping of the other sheet.
  • one sheet may have a different depth of crimping compared to the other sheet or one sheet may have a different density of crimping, i.e. a different number of crimp lines per unit distance, compared to the other sheet.
  • the skilled person will be aware of other physical differences that may characterise the two sheets of tobacco material.
  • the two sheets may be chemically different if they contain different chemical constituents, for example if the two sheets contain different tobacco blends, or different types of aerosol former, or different types of plasticiser, or different flavourants, or different proportions of any element.
  • one sheet may comprise a different proportion of Virginia tobacco compared with the other sheet, or one sheet may comprise a different proportion of an aerosol former such as glycerine compared to the other sheet.
  • the gathered sheets of material preferably extend along substantially the entire rod length of the rod and across substantially the entire transverse cross-sectional area of the rod.
  • the tobacco material forming the at least two sheets is preferably reconstituted tobacco or homogenised tobacco.
  • the tobacco material may comprise an aerosol-former.
  • rod is used to denote a generally cylindrical element of substantially circular, oval or elliptical cross-section.
  • sheet denotes a laminar element having a width and length substantially greater than the thickness thereof.
  • the width of a sheet is greater than 10 mm, preferably greater than 20 mm or 30 mm.
  • rod length denotes the dimension in the direction of the cylindrical axis of rods as described herein.
  • homogenised tobacco denotes a material formed by agglomerating particulate tobacco.
  • the term ‘gathered’ denotes that the sheet of tobacco material is convoluted, folded, or otherwise compressed or constricted substantially transversely to the cylindrical axis of the rod.
  • upstream and downstream are used to describe the relative positions of components, or portions of components, of aerosol-generating articles comprising rods as described herein in relation to the direction of air drawn through the aerosol-generating articles during use thereof.
  • Rods comprising at least two sheets of tobacco material advantageously exhibit significantly lower weight standard deviations than rods comprising shreds of tobacco material.
  • the weight of a rod of a particular rod length is determined by the density, width and thickness of the sheets of tobacco material that are gathered to form the rod.
  • the weight of rods of a particular rod length can thus be regulated by controlling the density and dimensions of the individual sheets of tobacco material. This reduces inconsistencies in weight between rods of the same dimensions, and so results in lower rejection rate of rods whose weight falls outside of a selected acceptance range.
  • Rods comprising sheets of tobacco material as described herein advantageously exhibit more uniform densities than rods comprising shreds of tobacco material.
  • Tobacco sheet material such as homogenised tobacco sheet material may be produced using different types of tobacco.
  • tobacco sheet material may be formed using tobaccos from a number of different varieties of tobacco, or tobacco from different regions of the tobacco plant, such as leaves or stem. After processing, the sheet has consistent properties and a homogenised flavour.
  • a single sheet of homogenised tobacco material may be produced to have a specific flavour.
  • a different tobacco sheet material needs to be produced.
  • Some flavours that are produced by blending a large number of different shredded tobaccos in a conventional cigarette may be difficult to replicate in a single homogenised tobacco sheet.
  • Virginia tobaccos and Burley tobaccos may need to be processed in different ways to optimise their individual flavours. It may not be possible to replicate a particular blend of Virginia and Burley tobaccos in a single sheet of homogenised tobacco material.
  • a rod may be provided comprising a sheet of a first tobacco material and a sheet of a second tobacco material that is chemically different from the first tobacco material.
  • the sheets of tobacco material are gathered together to form the rod.
  • the first tobacco material may be dominated by Virginia tobacco and the second tobacco material may be dominated by Burley tobacco.
  • the first tobacco material may be dominated by Virginia tobacco and the second tobacco material may be dominated by Oriental tobacco.
  • the first tobacco material may be dominated by Virginia tobacco and the second tobacco material may comprise Perique tobacco.
  • the first tobacco material may be formed primarily from leaf tobacco and the second tobacco material may be derived primarily from stem tobacco.
  • the first tobacco material may be treated or aged or processed or cured in a different way from the second tobacco material such that it is chemically different.
  • Homogenised tobacco may comprise aerosol forming compounds such as glycerine and propylene glycol. This may be particularly advantageous when the homogenised tobacco is to be used as an aerosol-forming substrate of a heated aerosol-forming article.
  • the first tobacco material may comprise a first aerosol-forming compound and the second tobacco material may comprise a second aerosol-forming compound different to the first aerosol-forming compound.
  • the second tobacco material may comprise a second aerosol-forming compound different to the first aerosol-forming compound.
  • glycerine as an aerosol-forming compound of a first sheet of tobacco material
  • triethylene glycol as an aerosol-forming compound of a second sheet of tobacco material.
  • a rod as described herein may be heated to evolve volatile compounds, which condense to form an inhalable aerosol.
  • the temperature at which an aerosol forms and the rate at which the rod is consumed may depend to some degree on the nature of the aerosol-forming compounds present in the rod. It may be desirable to modify or improve a consumer experience by controlling the temperature and rate at which aerosol is evolved. It may be desirable that a rod comprises two different sheets of tobacco material that each provide a different aerosol evolution response to a heating profile.
  • the first tobacco material may comprise a different amount of aerosol-forming compound to the second tobacco material.
  • the first tobacco material may comprise 5% by weight glycerine, while the second tobacco material may comprise 10% by weight glycerine.
  • the first tobacco material may comprise aerosol-forming compounds that form an aerosol at a lower temperature than aerosol-forming compounds of the second tobacco material.
  • Homogenised tobacco materials may include various other additives such as humectants, plasticisers, flavourants, fillers, binders and solvents. Some additives may be more suitable for use with one type of tobacco material than another type of tobacco material.
  • the first tobacco material may comprise different additives to the second tobacco material.
  • the first tobacco material may comprise a different proportion of additives compared to the second tobacco material.
  • a rod may be provided comprising a first sheet of a first tobacco material and a second sheet of a second tobacco material that is physically or morphologically different from the first sheet.
  • One of the sheets of tobacco material may be a textured sheet of material. Use of at least one textured sheet of material may advantageously facilitate gathering of the sheets to form a rod. Both or all of the sheets of tobacco material in a rod may be textured sheets of material.
  • textured sheet denotes a sheet that has been crimped, embossed, debossed, perforated or otherwise deformed. Crimping is a preferred form of texturing. Textured sheets of material may comprise a plurality of spaced-apart indentations, protrusions, perforations or a combination thereof.
  • the first sheet may be a textured sheet of tobacco material and the second sheet may be non-textured.
  • Both first and second sheets may be textured sheets of tobacco material.
  • the first sheet may be a textured sheet of tobacco material that is textured in a different way to the second sheet of tobacco material.
  • the first sheet may be crimped and the second sheet may be perforated.
  • Both first and second sheets may be crimped sheets that are morphologically different from each other.
  • the second sheet may be crimped with a different number of crimps per unit width of sheet compared to the first sheet.
  • the physical properties of the rod may be controlled.
  • the density of the rod may be controlled by gathering at least two sheets of tobacco material that are differently textured.
  • crimped sheet is intended to be synonymous with the term ‘creped sheet’ and denotes a sheet having a plurality of substantially parallel ridges or corrugations.
  • a crimped sheet of tobacco material for example a crimped sheet of homogenised tobacco material, has a plurality of ridges or corrugations substantially parallel to the cylindrical axis of the rod. This advantageously facilitates gathering of the crimped sheet of tobacco material to form the rod.
  • crimped sheets of tobacco material for use in rods as described herein may alternatively or in addition have a plurality of substantially parallel ridges or corrugations disposed at an acute or obtuse angle to the cylindrical axis of the rod.
  • sheets of material for use in rods as described herein may be substantially evenly textured over substantially their entire surface.
  • crimped sheets of material for use in rods as described herein may comprise a plurality of substantially parallel ridges or corrugations that are substantially evenly spaced-apart across the width of the sheet.
  • the at least two sheets that are gathered together to form the rod may have different physical dimensions.
  • the sheets are effectively endless sheets, and are supplied as a web to the manufacturing process.
  • the width and thickness of the sheets may be varied, however.
  • the first sheet may have a first thickness and the second sheet may have a second thickness that is a percentage or a fraction of the first thickness, for example a half or a third or a quarter of the first thickness.
  • the first sheet may have a first width and the second sheet may have a second width that is different to the first width.
  • the first sheet of the first tobacco material and the second sheet of the second tobacco material may be disposed in overlapping relationship prior to being gathered together, or at the point at which they are gathered together.
  • the sheets may have the same width and thickness.
  • the sheets may have different thicknesses.
  • the sheets may have different widths.
  • the sheets may be differently textured.
  • the sheets may be simultaneously textured prior to being gathered.
  • the sheets may be brought into overlapping relationship and passed through a texturing means, such as a pair of crimping rollers.
  • each sheet may be separately textured and then subsequently brought together to be gathered into a rod.
  • a rod may comprise one or more additional sheets of material gathered together with the first and second sheets to form the rod. Any additional sheet or sheets may be textured, for example crimped, prior to being gathered. Any additional sheet or sheets may comprise additional aerosol-forming materials, such as one or more additional sheets of homogenised tobacco.
  • a rod as described herein may be used as an aerosol-forming substrate in an aerosol-generating article.
  • An aerosol generating article may be provided comprising a rod as described herein.
  • Rods as described herein may be used as rods of combustible smokable material in lit-end smoking articles.
  • rods as described herein may be used as rods of combustible smokable material in lit-end cigarettes comprising a rod of combustible smokable material and a filter downstream of the rod of combustible smokable material.
  • rods as described herein may be particularly beneficial as a component of a heated aerosol-generating article, for example as an aerosol-forming substrate of a heated aerosol-generating article.
  • Heated aerosol-generating systems operate by heating an aerosol-forming substrate to generate an aerosol from the material of the substrate.
  • the aerosol can then be inhaled by a consumer.
  • an aerosol is generated by the transfer of heat from a heat source, for example a chemical, electrical or combustible heat source, to a physically separate aerosol-forming substrate, which may be located within, around or downstream of the heat source.
  • a heat source for example a chemical, electrical or combustible heat source
  • aerosol-forming substrate denotes a substrate consisting of or comprising an aerosol-forming material that is capable of releasing volatile compounds upon heating to generate an aerosol.
  • a sheet of tobacco material is an aerosol-forming substrate for the purposes of this specification.
  • Rods as described herein are particularly suited for use as aerosol-forming substrates of heated aerosol-generating articles. Aerosol-forming substrates in heated aerosol-generating articles are typically significantly shorter in rod length than rods of combustible smokable material in conventional lit-end smoking articles. As noted above, loose ends, high weight standard deviations and non-uniform densities as exhibited by rods comprising shreds of tobacco material are particularly undesirable in rods of aerosol-generating material having a short rod length.
  • Use of short rods as described herein as aerosol-generating substrates in heated aerosol-generating articles advantageously minimises or avoids one or more of the disadvantages associated with the use of short rods comprising shreds of tobacco material previously discussed above.
  • rods as described herein may be used as aerosol-forming substrates in heated aerosol-generating articles comprising a combustible heat source and an aerosol-generating substrate downstream of the combustible heat source.
  • rods as described herein may be used as aerosol-generating substrates in heated aerosol-generating articles of the type disclosed in WO-A-2009/022232, which comprise a combustible carbon-based heat source, an aerosol-generating substrate downstream of the combustible heat source, and a heat-conducting element around and in contact with a rear portion of the combustible carbon-based heat source and an adjacent front portion of the aerosol-generating substrate.
  • rods as described herein may also be used as aerosol-generating substrates in heated aerosol-generating articles comprising combustible heat sources having other constructions.
  • rods as described herein may be used as aerosol-generating substrates in heated aerosol-generating articles for use in electrically-operated aerosol-generating systems in which the aerosol-generating substrate of the heated aerosol-generating article is heated by an electrical heat source.
  • rods as described herein may be used as aerosol-generating substrates in heated aerosol-generating articles of the type disclosed in EP-A-0 822 670.
  • a system comprising an electrically-operated aerosol-generating apparatus and an aerosol-generating article for use with the apparatus.
  • the aerosol-generating article comprises a rod or an aerosol-forming substrate as described herein.
  • a filter for an aerosol-generating article may be provided, wherein the filter comprises a rod as described herein.
  • Rods may be used in filters for both lit-end aerosol-generating articles, such as conventional smoking articles, and heated aerosol-generating articles.
  • Rods as described herein may used in filters comprising a single filter segment.
  • Rods as described herein may also be used in multi-component filters comprising two or more filter segments.
  • EP-A-1 889 550 discloses a multi-component filter for a smoking article comprising: a mouth end segment; a first flavour release segment comprising tobacco or other plant leaf upstream of the mouth end segment; and a second flavour release segment comprising filtration material and a flavourant upstream of the first flavour release segment.
  • the resistance to draw of the second flavour release segment is greater than the resistance to draw of the first flavour release segment and the resistance to draw of the second flavour release segment is greater than the resistance to draw of mouth end segment.
  • rods as described herein may be used as tobacco-containing filter segments in single or multi-component filters.
  • rods as described herein may be used as a first flavor release segment in multi-component filters of the type disclosed in EP-A-1 889 550.
  • Filters comprising rods as described herein may further comprise one or more filtration materials for the removal of particulate components, gaseous components or a combination thereof.
  • Suitable filtration materials are known in the art and include, but are not limited to: fibrous filtration materials such as, for example, cellulose acetate tow and paper; adsorbents such as, for example, activated alumina, zeolites, molecular sieves and silica gel; biodegradable polymers including, for example, polylatic acid (PLA), Mater-Bi®, and bioplastics; and combinations thereof.
  • fibrous filtration materials such as, for example, cellulose acetate tow and paper
  • adsorbents such as, for example, activated alumina, zeolites, molecular sieves and silica gel
  • biodegradable polymers including, for example, polylatic acid (PLA), Mater-Bi®, and bioplastics; and combinations thereof.
  • filters comprising rods as described herein may further comprise one or more smoke or aerosol-modifying agents.
  • smoke and aerosol-modifying agents are known in the art and include, but are not limited to: flavourants such as, for example, menthol.
  • rods according to the specification are of substantially uniform cross-section.
  • Rods according to the specification may be produced having different dimensions depending upon their intended use.
  • rods according to the specification may have a diameter of between about 5 mm and about 10 mm depending upon their intended use.
  • rods according to the specification may have a rod length of between about 5 mm and about 150 mm depending upon their intended use.
  • rods according to the specification for use as aerosol-forming substrates in heated aerosol-generating articles may have a rod length of between about 5 mm and about 20 mm or about 30 mm.
  • rods according to the specification for use in filters for conventional lit-end smoking articles and heated aerosol-generating articles may have a rod length of between about 5 mm and about 30 mm.
  • Rods according to the specification of a desired unit rod length may be produced by forming a rod of multiple unit rod length and then cutting or otherwise dividing the rod of multiple unit rod length into multiple rods of the desired unit rod length.
  • rods having a rod length of about 15 mm for use as aerosol-forming substrates in heated aerosol-generating articles may be produced by forming a rod having a rod length of about 150 mm and then severing the elongate rod into ten rods having a rod length of about 15 mm.
  • Preferred embodiments comprise sheets of homogenised tobacco material.
  • Sheets of homogenised tobacco material may be formed by agglomerating particulate tobacco obtained by grinding or otherwise comminuting one or both of tobacco leaf lamina and tobacco leaf stems.
  • sheets of homogenised tobacco material tobacco may comprise one or more of tobacco dust, tobacco fines and other particulate tobacco by-products formed during, for example, the treating, handling and shipping of tobacco.
  • rods according to the specification are intended for use as aerosol-forming substrates in heated aerosol-generating articles
  • sheets of homogenised tobacco material used to form the rods preferably comprise particulate tobacco obtained by grinding or otherwise comminuting tobacco leaf lamina.
  • sheets of homogenised tobacco material may have a tobacco content of at least about 40% by weight on a dry weight basis or of at least about 50% by weight on a dry weight basis. In other embodiments, sheets of homogenised tobacco material may have a tobacco content of about 70% or more by weight on a dry weight basis.
  • Sheets of homogenised tobacco material may comprise one or more intrinsic binders, that is tobacco endogenous binders, one or more extrinsic binders, that is tobacco exogenous binders, or a combination thereof to help agglomerate the particulate tobacco.
  • sheets of homogenised tobacco material may comprise other additives including, but not limited to, tobacco and non-tobacco fibres, aerosol-formers, humectants, plasticisers, flavourants, fillers, aqueous and non-aqueous solvents and combinations thereof.
  • Suitable extrinsic binders for inclusion in sheets of homogenised tobacco material for use in forming a rod as described herein include, but are not limited to: gums such as, for example, guar gum, xanthan gum, arabic gum and locust bean gum; cellulosic binders such as, for example, hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and ethyl cellulose; polysaccharides such as, for example, starches, organic acids, such as alginic acid, conjugate base salts of organic acids, such as sodium-alginate, agar and pectins; and combinations thereof.
  • gums such as, for example, guar gum, xanthan gum, arabic gum and locust bean gum
  • cellulosic binders such as, for example, hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and ethyl
  • non-tobacco fibres for inclusion in sheets of homogenised tobacco material include, but are not limited to: cellulose fibers; soft-wood fibres; hard-wood fibres; jute fibres and combinations thereof.
  • non-tobacco fibres Prior to inclusion in sheets of homogenised tobacco material, non-tobacco fibres may be treated by suitable processes known in the art including, but not limited to: mechanical pulping; refining; chemical pulping; bleaching; sulfate pulping; and combinations thereof.
  • Sheets of homogenised tobacco material for use in forming rods as described herein should have sufficiently high tensile strength to survive being gathered to form rods.
  • non-tobacco fibres may be included in sheets of homogenised tobacco material in order to achieve an appropriate tensile strength.
  • homogenised sheets of tobacco material for forming rods as described herein may comprise between about 1% and about 5% non-tobacco fibres by weight on a dry weight basis.
  • Suitable aerosol-formers and humectants for inclusion in sheets of homogenised tobacco material include, but are not limited to: polyhydric alcohols, such as triethylene glycol, 1,3-butanediol and glycerine; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • polyhydric alcohols such as triethylene glycol, 1,3-butanediol and glycerine
  • esters of polyhydric alcohols such as glycerol mono-, di- or triacetate
  • aliphatic esters of mono-, di- or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • sheets of homogenised tobacco material for use in forming rods as described herein may have an aerosol former content of between about 5% and about 30% by weight on a dry weight basis.
  • Rods intended for use in electrically-operated aerosol-generating system having a heating element may preferably include an aerosol former of greater than 5% to about 30%.
  • the aerosol former may preferably be glycerine.
  • composition of sheets of homogenised tobacco material may be designed to comply with regulatory requirements.
  • a number of reconstitution processes for producing sheets of homogenised tobacco materials are known in the art. These include, but are not limited to: paper-making processes of the type described in, for example, U.S. Pat. No. 3,860,012; casting or ‘cast leaf’ processes of the type described in, for example, U.S. Pat. No. 5,724,998; dough reconstitution processes of the type described in, for example, U.S. Pat. No. 3,894,544; and extrusion processes of the type described in, for example, in GB-A-983,928.
  • the densities of sheets of homogenised tobacco material produced by extrusion processes and dough reconstitution processes are greater than the densities of sheets of homogenised tobacco materials produced by casting processes.
  • Sheets of homogenised tobacco material for use in forming rods as described herein are preferably formed by a casting process of the type generally comprising casting a slurry comprising particulate tobacco and one or more binders onto a conveyor belt or other support surface, drying the cast slurry to form a sheet of homogenised tobacco material and removing the sheet of homogenised tobacco material from the support surface.
  • sheets of homogenised tobacco material may be formed from slurry comprising particulate tobacco, guar gum, cellulose fibres and glycerine by a casting process.
  • Sheets of homogenised tobacco material may be textured using suitable known machinery for texturing filter tow, paper and other materials.
  • sheets of homogenised tobacco material for forming rods as described herein may be crimped using a crimping unit of the type described in CH-A-691156, which comprises a pair of rotatable crimping rollers.
  • sheets of homogenised tobacco material may be textured using other suitable machinery and processes that deform or perforate the sheets of homogenised tobacco material.
  • Rods according to the specification may be produced from sheets of homogenised tobacco material that have a range of different dimensions, depending upon the intended use of the rods. Sheets of homogeneous tobacco material should be of sufficient width to be gathered to form a rod as described herein.
  • sheets of tobacco material for use in rods as described herein have a width of at least about 25 mm.
  • sheets of tobacco material for use in rods as described herein may have a width of between about 25 mm and about 300 mm.
  • sheets of tobacco material for use in rods as described herein have a combined thickness of at least about 50 ⁇ m to about 100 ⁇ m.
  • Combined thickness refers to the total thickness of all sheets that make up the rod. For example, if the rod is formed from two sheets, then the combined thickness is the sum of the thickness of each individual sheet.
  • Sheets of tobacco material for use in rods as described herein may have individual thicknesses of between about 25 ⁇ m to about 100 ⁇ m.
  • sheets of tobacco material for use in rods as described herein may have a thickness of between 10 ⁇ m and about 300 ⁇ m.
  • sheets of homogenised tobacco material for use in rods as described herein may have a grammage 100 g/m 2 and about 300 g/m 2 .
  • Rods as described herein may comprise a gathered sheet of homogenised tobacco material circumscribed by a porous wrapper or a non-porous wrapper.
  • rods as described herein may comprise at least two sheets of homogenised tobacco material gathered together and circumscribed by a paper wrapper.
  • Suitable paper wrappers for use in specific embodiments of the invention are known in the art and include, but are not limited to: cigarette papers; and filter plug wraps.
  • rods as described herein may comprise a non-paper wrapper.
  • Suitable non-paper wrappers for use in forming rods as described herein are known in the art and include, but are not limited to: homogenised tobacco materials.
  • Rods as described herein may be produced using conventional cigarette making and cigarette filter making machinery, adapted to allow for the gathering of two or more sheets simultaneously.
  • rods comprising first and second crimped sheets of homogeneous tobacco material may be produced using an adaptation of machinery for forming filter rods comprising a gathered crimped sheet of paper of the type described in CH-A-691156.
  • the machinery could be adapted to allow two sheets of material to be crimped and gathered.
  • a method of forming a rod comprising the steps of: providing a first continuous sheet of tobacco material, providing a second continuous sheet of tobacco material, simultaneously gathering the first and second continuous sheets of tobacco material transversely relative to the longitudinal axes thereof; circumscribing the gathered sheets of tobacco material with a wrapper to form a continuous rod, and severing the continuous rod into a plurality of discrete rods, in which the first continuous sheet of tobacco material is physically or chemically different to the second continuous sheet of tobacco material.
  • the method may further comprise texturing the first continuous sheet.
  • the method may comprise crimping, embossing, perforating or otherwise texturing the first continuous sheet prior to gathering the first continuous sheet together with the second continuous sheet.
  • the method further comprises crimping the first continuous sheet.
  • Both first and second continuous sheets may be textured, for example crimped.
  • Both first and second sheets of tobacco material may be crimped prior to being gathered.
  • FIG. 1 shows a schematic cross-section of apparatus for forming a rod according to a specific embodiment
  • FIG. 2 shows a schematic cross-section of apparatus for forming a rod according to a specific embodiment
  • FIGS. 3 to 8 illustrate cross-sectional views of sheets of tobacco material immediately prior to entering a gathering means to be gathered into a rod
  • FIGS. 9 and 10 illustrate embodiments of aerosol-generating devices that incorporate rods formed as described herein.
  • FIG. 11 illustrates an aerosol-generating system comprising an electrically-operated aerosol-generating device and an aerosol-generating article as illustrated in FIG. 9 .
  • the apparatus shown in FIG. 1 generally comprises: first supply means for providing a first continuous sheet of homogenised tobacco material; second supply means for providing a second continuous sheet of homogenised material; crimping means for crimping the first continuous sheet of homogenised tobacco material; rod forming means for gathering both the first and second continuous sheets of homogenised tobacco material together and circumscribing the gathered material with a wrapper to form a continuous rod; and cutting means for severing the continuous rod into a plurality of discrete rods.
  • the apparatus also comprises transport means for transporting at least the first continuous sheet of homogenised tobacco material downstream through the apparatus from the supply means to the rod forming means via the crimping means.
  • the first supply means for providing a first continuous sheet of homogenised tobacco material comprises a continuous sheet of homogenised tobacco material 2 mounted on a first bobbin 4 .
  • the second supply means for providing a second continuous sheet of homogenised tobacco material comprises a continuous sheet of homogenised tobacco material 3 mounted on a second bobbin 5 .
  • the crimping means comprises a pair of rotatable crimping rollers 6 . In use, the first continuous sheet of homogenised tobacco material 2 is drawn from the first bobbin 4 and transported downstream to the pair of crimping rollers 6 by the transport mechanism via a series of guide and tensioning rollers.
  • the crimping rollers engage and crimp the first continuous sheet of homogenised tobacco material 2 to form a first continuous crimped sheet of homogenised tobacco material 8 having a plurality of spaced-apart ridges or corrugations substantially parallel to the longitudinal axis of the sheet of homogenised tobacco material through the apparatus.
  • the first continuous crimped sheet of homogenised tobacco material 8 is transported downstream from the pair of crimping rollers 6 towards the rod forming means.
  • the second continuous sheet of homogenised tobacco material 3 is transported from the second bobbin 5 towards the rod forming means.
  • Both the second continuous sheet of homogenised tobacco material 3 and the first continuous sheet of crimped homogenised tobacco material 8 are simultaneously fed through a converging funnel or horn 10 .
  • the converging funnel 10 gathers the continuous sheets of material 8 , 3 transversely relative to their longitudinal axes.
  • the continuous sheets of material 8 , 3 assume a substantially cylindrical configuration as they pass through the converging funnel 10 .
  • the gathered sheets of homogenised tobacco material are wrapped in a continuous sheet of wrapping material 12 .
  • the continuous sheet of wrapping material is fed from a bobbin 14 and enveloped around the gathered sheets of material by an endless belt conveyor or garniture.
  • the rod forming means comprises an adhesive application means 16 that applies adhesive to one of the longitudinal edges of the continuous sheet of wrapping material, so that when the opposed longitudinal edges of the continuous sheet of wrapping material are brought into contact they adhere to one other to form a continuous rod.
  • the rod forming means further comprises a drying means 18 downstream of the adhesive application means 16 , which in use dries the adhesive applied to the seam of the continuous rod as the continuous rod is transported downstream from the rod forming means to the cutting means.
  • the cutting means comprises a rotary cutter 20 that severs the continuous rod into a plurality of discrete rods of unit rod length or multiple unit rod length.
  • the rod As the two continuous sheets of material are fed into the converging funnel while overlaid, one sheet on top of the other, the rod has an even distribution of the first sheet of tobacco material and the second sheet of tobacco material.
  • the second continuous sheet of homogenised tobacco material is depicted as being gathered into a rod without being crimped, it is clear that this second continuous sheet may pass through a set of crimping rollers to be crimped prior to being gathered into a rod.
  • a rod comprising a sheet of a first tobacco material and a continuous element of a second tobacco material having a different chemical composition to the first tobacco material
  • the second sheet of homogenised tobacco material on the second bobbin could be replaced with a bobbin holding a suitable continuous element.
  • Such an element may take the form of a ribbon, strip, tape or thread. Operation of the process would otherwise be as described above.
  • a second continuous sheet of homogenised tobacco material 3 is positioned in overlapping relationship with a first continuous sheet of homogenised tobacco material 2 upstream of a pair of crimping rollers 6 .
  • the apparatus is otherwise substantially as described above in relation to FIG. 1 .
  • Both continuous sheets of material 2 , 3 pass through the crimping rollers 6 in overlapping relationship and are simultaneously crimped.
  • a crimped pair of continuous sheets 9 passes out of the crimping rollers 6 and downstream into the converging funnel 10 to be formed into a rod.
  • FIGS. 3 to 8 provide schematic cross-sectional illustrations of different possible arrangements of two sheets of tobacco material immediately prior to entering into a converging funnel or horn in order to be gathered into a rod. All of these Figures illustrate the relative thickness, width, and cross-sectional shape of each sheet of tobacco. The length dimension of each of the sheets in these schematic illustrations extends into the plane of the paper.
  • FIG. 3 illustrates an arrangement in which a first sheet of tobacco material 300 is overlaid with a second sheet of tobacco material 310 of the same dimensions prior to both sheets entering a gathering device to be gathered into a rod. While the physical dimensions of each sheet are the same, the chemical composition of each sheet is different.
  • FIG. 4 illustrates an arrangement in which a first sheet of tobacco material 400 is overlaid with a second sheet of tobacco material 410 that has a smaller thickness dimension compared to the first tobacco sheet 400 . While the physical dimensions of each sheet differ, in that one sheet is thinner than the other, the chemical composition of each sheet may be identical. In preferred embodiments, however, the chemical composition of each sheet will also differ.
  • FIG. 5 illustrates an arrangement in which a first sheet of tobacco material 500 is positioned adjacent to a second sheet of tobacco material 510 of the same dimensions prior to both sheets entering a gathering device to be are gathered into a rod. While the physical dimensions of each sheet are the same, the chemical composition of each sheet is different.
  • FIG. 6 illustrates an arrangement in which a first sheet of tobacco material 600 is overlaid with a second sheet of tobacco material 610 prior to both sheets entering a gathering device to be gathered into a rod.
  • the second sheet has been crimped.
  • the composition of the two sheets may be the same or different.
  • FIG. 7 illustrates an arrangement in which a first crimped sheet of tobacco material 700 is overlaid with a second crimped sheet of tobacco material 710 prior to both sheets entering a gathering device to be gathered into a rod. While the physical dimensions of each sheet are the same, the chemical composition of each sheet is different.
  • FIG. 8 illustrates an arrangement in which a first sheet of tobacco material 800 is overlaid with a second sheet of tobacco material 810 prior to both sheets entering a gathering device to be gathered into a rod.
  • the second sheet 810 has a lesser width and thickness compared with the first sheet 800 .
  • FIG. 9 illustrates an embodiment of an aerosol-generating article 1000 comprising a rod as described herein.
  • the article 1000 comprises four elements; an aerosol-forming substrate 1020 , a hollow cellulose acetate tube 1030 , a spacer element 1040 , and a mouthpiece filter 1050 . These four elements are arranged sequentially and in coaxial alignment and are assembled by a cigarette paper 1060 to form the aerosol-generating article 1000 .
  • the article 1000 has a mouth-end 1012 , which a user inserts into his or her mouth during use, and a distal end 1013 located at the opposite end of the article to the mouth end 1012 .
  • the embodiment of an aerosol-generating article illustrated in FIG. 9 is particularly suitable for use with an electrically-operated aerosol-generating device comprising a heater for heating the aerosol-forming substrate.
  • the article 1000 When assembled, the article 1000 is about 45 millimetres in length and has an outer diameter of about 7.2 millimetres and an inner diameter of about 6.9 millimetres.
  • the aerosol-forming substrate 1020 comprises a rod formed from a first sheet of crimped cast-leaf tobacco and a second sheet of crimped cast-leaf tobacco wrapped in a filter paper (not shown) to form a plug. Both sheets of cast-leaf tobacco include additives, including glycerine as an aerosol-forming additive.
  • the first sheet of cast-leaf tobacco and the second sheet of cast-leaf comprise different blends of tobacco and therefore differ chemically.
  • An aerosol-generating article 1000 as illustrated in FIG. 9 is designed to engage with an aerosol-generating device in order to be consumed.
  • Such an aerosol-generating device includes means for heating the aerosol-forming substrate 1020 to a sufficient temperature to form an aerosol.
  • the aerosol-generating device may comprise a heating element that surrounds the aerosol-generating article 1000 adjacent to the aerosol-forming substrate 1020 , or a heating element that is inserted into the aerosol-forming substrate 1020 .
  • a user draws on the mouth-end 1012 of the smoking article 1000 and the aerosol-forming substrate 1020 is heated to a temperature of about 375 degrees Celsius. At this temperature, volatile compounds are evolved from the two different sheets of cast-leaf tobacco of the aerosol-forming substrate 1020 . These compounds condense to form an aerosol. The aerosol is drawn through the filter 1050 and into the user's mouth.
  • FIG. 10 illustrates a second embodiment of an aerosol-generating article 1001 . While the article of FIG. 9 is intended to be consumed in conjunction with an aerosol-generating device, the article of FIG. 10 comprises a combustible heat source 1080 that may be ignited and transfer heat to the aerosol-forming substrate 1020 to form an inhalable aerosol.
  • the combustible heat source 80 is a charcoal element that is assembled in proximity to the aerosol-forming substrate at a distal end 13 of the rod 11 . Elements that are essentially the same as elements in FIG. 9 have been given the same numbering.
  • FIG. 11 illustrates a portion of an electrically-operated aerosol-generating system 2000 that utilises a heating blade 2100 to heat an aerosol-generating substrate 1020 of an aerosol-generating article 1000 .
  • the heating blade is mounted within an aerosol article receiving chamber of an electrically-operated aerosol-generating device 2010 .
  • the aerosol-generating device defines a plurality of air holes 2050 for allowing air to flow to the aerosol-generating article 1000 . Air flow is indicated by arrows on FIG. 11 .
  • the aerosol-generating device comprises a power supply and electronics, which are not illustrated in FIG. 11 .
  • the aerosol-generating article 1000 of FIG. 11 is as described in relation to FIG. 9 .
  • Rods according to a specific embodiment of the invention comprise a first crimped sheet of homogenised tobacco material gathered together with a second crimped sheet of homogenised tobacco material, and circumscribed by a paper wrapper.
  • the rods have a rod length of 12 mm and diameters of between 6.9 mm and 7.2 mm.
  • the rods were produced at rates of between 20 m/min and 25 m/min using apparatus of the type shown in FIG. 1 .
  • the first continuous sheet of homogenised tobacco material was produced by a casting process, the sheets having a width of between 110 mm and 134 mm, a thickness of 120 ⁇ m to 260 ⁇ m, a grammage of between 167 g/m 2 and 201 g/m 2 and a moisture content of between 5 % and 12%.
  • the first continuous sheet comprises about 10% by weight of glycerine.
  • the second continuous sheet of homogenised tobacco material was produced by a casting process, the sheets having a width of between 110 mm and 134 mm, a thickness of 120 ⁇ m to 260 ⁇ m, a grammage of between 167 g/m 2 and 201 g/m 2 and a moisture content of between 5% and 12%.
  • the second continuous sheet comprises about 10% by weight of propylene glycol.
  • the first continuous sheet of homogenised tobacco and the second continuous sheet of homogenised tobacco were crimped by being arranged in overlapping relationship and passing through a crimping roller together prior to being gathered into a rod.
US14/402,482 2012-05-31 2013-05-30 Blended rods for use in aerosol-generating articles Abandoned US20150150302A1 (en)

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UA118086C2 (uk) 2018-11-26
PH12014502504B1 (en) 2014-12-22
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