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  • 专利说明
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    • 专利摘要:
    SMOKING ITEM. The present invention relates to a smoking article (1, 100, 200, 300) comprising a plurality of elements, including a front plug (2, 102, 202, 302) and an aerosol forming substrate (7) , mounted in contact with a cigarette paper (5) to form a bar (15). The front plug (2, 102, 20 2, 302) is located upstream of the aerosol forming substrate (7). In use, the heating element (8) is inserted into the smoking article (1, 100 200, 300) and the aerosol forming substrate (7) is heated to generate an aerosol. When the heating element (8) 'is subsequently removed from the smoking article (1, 100, 200, 300), the front plug (2, 102, 202, 302) acts to retain the aerosol forming substrate (7) inside the bar (15).
    公开号:BR112014013198B1
    申请号:R112014013198-8
    申请日:2012-12-28
    公开日:2020-11-10
    发明作者:Gérard Zuber；Cédric Meyer；Thomas Badertscher
    申请人:Philip Morris Products S.A；
    IPC主号:
    专利说明:

    [001] The present specification relates to a smoking article comprising an aerosol-forming substrate to generate an inhalable aerosol when heated by a heating element. The specification also refers to a method for using such a smoking article.
    [002] Smoking articles in which an aerosol-forming substrate, such as a substrate containing tobacco, is heated rather than burned are known in the art. The purpose of such heated smoking articles is to reduce the known harmful smoke constituents produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes. Typically in such heated smoking articles, an aerosol is generated by transferring heat from a heat source to a physically separate aerosol-forming substrate or material, which can be located inside, around or downstream of the heat source. During smoking, volatile compounds are released from the aerosol-forming substrate by transferring heat from the heat source and entrained in the air aspirated through the smoking article. As the released compounds cool, they condense to form an aerosol that is inhaled by the consumer.
    [003] A number of prior art documents describe aerosol generating devices for consuming or smoking heated smoking articles. Such devices include, for example, heated smoking systems and electrically heated smoking systems. An advantage of these systems is that they significantly reduce the lateral flow of smoke, while allowing the smoker to selectively suspend or resume smoking. An example of a heated smoking system is described in U.S. Patent Number 5,144,962, which includes in one embodiment a means of generating flavor in contact with a heater. When the flavoring medium is exhausted, both the flavoring medium and the heater are replaced. An aerosol-forming device where a smoking article can be replaced without the need to remove the heating element is desirable.
    [004] Typically, smoking articles for use with aerosol forming devices comprise an aerosol forming substrate that is assembled, often with other elements or components, in the form of a bar. Typically, such a bar is configured in shape and size to be inserted into an aerosol generating device that comprises a heating element to heat the aerosol forming substrate.
    [005] A direct contact between the heating element, for example, an electrically actuated heating element, and the aerosol-forming substrate can provide an efficient means of heating the aerosol-forming substrate to form an inhalable aerosol. In such a device configuration, the heat from a heating element can be transported almost instantly to at least a portion of the aerosol-forming substrate when the heating element is actuated, and this can facilitate the rapid generation of an aerosol. Furthermore, the total heating energy required to generate an aerosol may be lower than would be the case in a system where the aerosol-forming substrate does not directly contact a heating element and the initial heating of the aerosol-forming substrate occurs by convection or radiation. Where a heating element is in direct contact with an aerosol forming substrate, initial heating of portions of the aerosol forming substrate that are in contact with the heating element will be carried out by conduction.
    [006] Direct contact between a heating element and an aerosol-forming substrate can result in shrinkage of the aerosol-forming substrate. The shrinkage of the aerosol-forming substrate due to thermal contractions can cause the aerosol-forming substrate to adhere to a heating element. This can make it difficult to remove the smoking article from the heating element. Adhesion problems between a heating element and an aerosol forming substrate can be specifically pronounced when the aerosol forming substrate is in the form of a pleated sheet of homogenized tobacco material. The heating of such a substrate can be achieved by inserting a heating element within the folds of the pleated sheet material. Shrinkage of such substrate during heating can cause the substrate to grip the heating element tightly, making it difficult to cleanly remove the heating element from the aerosol forming substrate.
    [007] Shrinkage of the aerosol-forming substrate can also loosen the aerosol-forming substrate within the smoking article. A preferred embodiment of a smoking article can be formed from a number of cylindrical elements arranged in sequence and assembled by wrapping with cigarette paper. Cigarette paper retains the elements in position by an interference interaction. Within the smoking article, the aerosol-forming substrate, or a cylindrical plug comprising the aerosol-forming substrate, is retained by contact with the cigarette paper. The shrinkage of the aerosol forming substrate during heating may mean that the aerosol forming substrate, or a portion thereof, is more likely to be removed from the smoking article bar when the smoking article is removed from the heating element. This would result in the need to clean the aerosol generating device that comprises the heating element before the aerosol generating device could be used to smoke another smoking article. An aerosol-forming substrate that is trapped in a heating element will provide a physical barrier to reusing the heating element as it can prevent the heating element from being inserted into a new smoking article.
    [008] It is also undesirable for small portions of aerosol-forming substrate and residues of aerosol-forming substrate to remain in contact with the heating element as these can decompose over prolonged heating and produce unpleasant flavors that are detectable by a user.
    [009] As used herein, the terms' aerosol generating article 'and' smoking article're refer to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol generating article may be a smoking article that generates an aerosol that is directly inhaled into a user's lungs through the user's mouth. An aerosol generating article may be disposable.
    [0010] As used herein, an aerosol generating article is a heated aerosol generating article, which is an aerosol generating article comprising an aerosol forming substrate that is intended to be heated instead of being burned in order to release volatile compounds that can form an aerosol. The aerosol formed by heating the aerosol-forming substrate may contain less known harmful constituents than would be produced by combustion or pyrolytic degradation of the aerosol-forming substrate. An aerosol-generating article may comprise a tobacco stick.
    [0011] As used herein, an 'aerosol generating device' refers to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol forming substrate forms part of an aerosol generating article, for example, part of a smoking article. An aerosol generating device may comprise one or more components used to supply energy from a power source to an aerosol-forming substrate to generate an aerosol.
    [0012] An aerosol generating device can be described as a heated aerosol generating device, which is an aerosol generating device comprising a heater. The heater is preferably used to heat the aerosol forming substrate of an aerosol generating device to generate an aerosol.
    [0013] An aerosol generating device may be an electrically heated aerosol generating device, which is an aerosol generating device comprising a heater that is operated by electrical energy to heat an aerosol forming substrate from a device of aerosol generation to generate an aerosol. An aerosol generating device can be a gas heated aerosol generating device. An aerosol generating device can be a smoking device that interacts with an aerosol forming substrate of an aerosol generating device to generate an aerosol that is directly inhaled to a user's lungs through the user's mouth.
    [0014] As used herein, the term 'aerosol-forming substrate' refers to a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate. An aerosol-forming substrate can be adsorbed, coated, impregnated or otherwise loaded onto a carrier or support. An aerosol forming substrate can conveniently be part of an aerosol generating article or smoking article.
    [0015] An aerosol-forming substrate may comprise nicotine. An aerosol-forming substrate may comprise tobacco, for example, it may comprise a tobacco-containing material that contains volatile tobacco flavor compounds, which are released from the aerosol-forming substrate when heating. In preferred embodiments, an aerosol forming substrate may comprise a homogenized tobacco material, for example, molded tobacco leaf.
    [0016] The specification refers to a smoking article and a method for using a smoking article. In one embodiment, a smoking article comprising a plurality of elements mounted in contact with a cigarette paper to form a bar is provided. The elements assembled in contact with the cigarette paper to form the bar include a front plug and an aerosol forming substrate. The bar can be defined as having a mouth end and a more distant end located upstream of the mouth end. The front plug is located upstream of the aerosol-forming substrate within the bar.
    [0017] In use, a user applies his lips to the mouth end of the bar and inhales. Air and any aerosol generated inside the bar are sucked through the mouth end of the bar to be inhaled by the user. When the user inhales, air and aerosol move through the bar in a direction usually from the farthest end to the mouth end of the bar. In some modes, air can be sucked into the bar through the farthest end of the bar. In some embodiments, air can be drawn into the bar through a side wall of the bar. In other embodiments, air can be drawn into the bar through a combination of the farthest end and a side wall of the bar.
    [0018] For simplicity, the terms 'upstream' and 'downstream' as used herein refer to a relative position along the bar of the smoking article with reference to the direction in which the aerosol is aspirated through the bar. Any element or component that is closest to the farthest end of a specific reference point can be defined as upstream of that point. Likewise, any element or component that is closest to the mouth end of a reference point can be defined as downstream of that point. In this embodiment, the front plug is located closer to the far end of the bar than the aerosol-forming substrate. Thus, the front plug can be defined as being upstream of the aerosol forming substrate.
    [0019] In some embodiments, the smoking article may comprise additional elements. For example, the article may further comprise a filter, such as a nozzle filter, located downstream of the aerosol-forming substrate. Preferably, such a filter is located at the mouth end of the bar. If present, a filter is preferably mounted together with the front plug and the aerosol forming substrate within the bar. Suitable filters can be made of any suitable filter material. Many such filter materials are known in the art, for example, a suitable filter can be made of a cellulose acetate fiber length. Other elements such as free flow filters and spacers can also be mounted in contact with the cigarette paper as part of the smoking article.
    [0020] An advantage of the front plug is that it can prevent the egress of the aerosol-forming substrate from the far end of the bar during handling and transportation. Another advantage of the front plug is that it can assist in locating the aerosol-forming substrate at a predetermined distance from the far end of the bar for optimal coupling with a heat source such as a heating element.
    [0021] Preferred embodiments are smoking articles for use with an aerosol generating device that comprises one or more heating elements that are configured to contact the aerosol forming substrate. For the avoidance of doubt, in the following description the term heating element is used to mean one or more heating elements.
    [0022] It may be preferable for the front plug to be penetrable by the heating element so that the heating element can contact or penetrate the aerosol-forming substrate. In such embodiments, the aerosol-forming substrate may shrink in contact with a heating element during an aerosol generation phase. The aerosol-forming substrate can also shrink so that its contact with cigarette paper is reduced. Without a front plug, removal of the heating element from the bar can also result in removal of the aerosol forming substrate due to increased adhesion of the aerosol forming substrate with the heating element coupled with decreased adhesion of the aerosol forming substrate. with the cigarette paper. However, the front plug can facilitate removal or extraction of the heating element from the bar by restricting the movement of the aerosol forming substrate towards the farthest end of the bar. The front plug blocks the passage of the aerosol-forming substrate and therefore prevents the aerosol-forming substrate from being removed from the bar.
    [0023] The front plug can be made of a filter material that allows air to be sucked in through the front plug. This can allow a user to draw air through the bar through the front plug. The front plug can conveniently be formed from the same material as a conventional nozzle filter. For example, the front plug can be formed of a cellulose acetate fiber length. The permeability of the front plug can be varied to help control the resistance to aspirate through the smoking article. Alternatively, the front plug can be formed of a material that is not permeable to air. In such embodiments, the smoking article can be configured so that air flows into the bar through a side wall. Optionally, air drawn into the bar through a side wall can enter through the cigarette paper or through defined pores through the cigarette paper.
    [0024] The front plug may comprise one or more materials selected from the group comprising ceramics, polymer, biopolymer, metal, zeolite, paper, cardboard, inert material, and inorganic material. The front plug has a diameter that is approximately equal to the diameter of the smoking article. Preferably, the front plug has a diameter of approximately 5 millimeters and approximately 10 millimeters. The front plug has a length that can be defined as the dimension along the longitudinal geometric axis of the smoking article. The length of the front plug can be between approximately 1 millimeter and approximately 10 millimeters, for example, between approximately 4 millimeters and approximately 8 millimeters. It is preferred that the front plug is substantially cylindrical and has a length of at least 2 mm in order to facilitate the assembly of the smoking article, preferably at least 3 mm or at least 4 mm. A longer plug can also provide an improved cleaning effect as there is more of the front plug material available to scrape the heating element as the heating element is removed from the plug. It is preferable that the diameter of the plug is greater than 5 mm, for example, between 6 mm and 8 mm.
    [0025] In some embodiments, the front plug may be entirely or partially formed from an aerosol-forming substrate. For example, the aerosol forming substrate can be a material comprising tobacco or processed tobacco and the front plug can comprise this material. If an aerosol-forming substrate is incorporated into the front plug, the density of the aerosol-forming substrate can be increased at the far end of the bar to allow the aerosol-forming substrate to function as a front plug.
    [0026] Some embodiments of the smoking article are designed to be used in conjunction with an aerosol generating device that has a heating element to heat the aerosol forming substrate. Such heating elements are typically in the form of pins or blades that can be inserted into the smoking article via the front plug. To facilitate this, the front plug may have physical properties that facilitate the insertion of a heating element. For example, the front plug can be formed from a low strength material such as a bundle of fibers or polymeric foam. A front plug formed of a bundle of fibers may have fibers aligned in a direction that is longitudinal with respect to the bar in order to reduce the insertion force required to insert a heating element into the smoking article in a longitudinal direction.
    [0027] The front plug can define a hole or a slot to allow a heating element to pass through. A heating element is then able to contact or penetrate the aerosol-forming substrate with the low insertion force required to penetrate the front plug. A hole defined through a front plug can be dimensioned to be coupled with a heating element inserted through it. For example, the size and shape of the hole defined through the front plug can almost exactly match the size and shape of a cross section of the heating element. The hole may be smaller than the heating element, or it may be a crack. In such embodiments, the heating element may need to deform the material of the front plug in order to penetrate the front plug. Any hole defined through the front plug can be cylindrical or prismatic in shape. For example, the hole defined through the front plug can be formed as a circular cylinder or a hexagonal cylinder. Any slot defined through the front plug can be a single slot or multiple slots.
    [0028] The material that forms the front plug can be a resilient material or a partially resilient material that can be deformed by inserting a heating element and recovering its shape when the heating element is removed. Thus, where a heating element pierces the front plug, the material of the front plug may deform to allow access to the heating element. When the heating element is removed, the hole drilled through the front plug may close or partially close. An advantage of such modalities may be that the front plug scrapes the heating element as the element is removed from the smoking article. This can help to remove any fragments of the aerosol forming substrate that have adhered to the heating element, and can help to clean up any volatile compounds that have been deposited on the heating element. The heating element can therefore be cleaned each time the heating element is removed from a smoking article.
    [0029] The front plug does not need to be formed of a resilient material in order to provide cleaning functionality. For example, if a hole through a front plug is dimensioned to almost exactly match a cross section of a heating element, then some cleaning functionality can be provided when removing the heating element. Likewise, if the front plug defines a slot through which the heating element can pass, the front plug material surrounding the slot is deflected when a heating element is inserted. Subsequent removal of the heating element can also result in interference between the heating element and the material surrounding the crack, which can provide for cleaning or scraping of the heating element.
    [0030] The front plug may have more than one hole or slit defined through it. For example, if the smoking article is intended to be used with an aerosol generating device that has three heating pins, the front plug of a compatible smoking article can comprise three holes arranged to accept the passage of the heating pins.
    [0031] The aerosol forming substrate can be a solid aerosol forming substrate. Alternatively, the aerosol forming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material that contains volatile tobacco flavor compounds, which are released from the substrate upon heating. Alternatively, the aerosol forming substrate may comprise a non-tobacco material. The aerosol forming substrate may further comprise an aerosol former. Examples of suitable aerosol builders are glycerin and propylene glycol.
    [0032] If the aerosol forming substrate is a solid aerosol forming substrate, the solid aerosol forming substrate may comprise, for example, one or more of: powder, granules, grains, scraps, spaghetti strands, strips or leaves that contain one or more of the grass leaf, tobacco leaf, tobacco rib fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco and expanded tobacco. The solid aerosol forming substrate can be in loose form, or it can be provided in a suitable container or cartridge. For example, the aerosol-forming material of the solid aerosol-forming substrate may be contained within a paper or other wrapper and be shaped like a plug. Where an aerosol-forming substrate is in the form of a plug, the entire plug including any wrap is considered to be the aerosol-forming substrate.
    [0033] Optionally, the solid aerosol-forming substrate may contain additional tobacco or non-tobacco volatile flavor compounds, to be released upon heating of the solid aerosol-forming substrate. The solid aerosol-forming substrate may also contain capsules that, for example, include additional tobacco or non-tobacco volatile flavor compounds, and such capsules may melt while heating the solid aerosol-forming substrate.
    [0034] Optionally, the solid aerosol-forming substrate can be provided on or embedded in a terribly stable support. The support can take the form of powder, granules, grains, scraps, spaghetti strings, strips or leaves. The solid aerosol-forming substrate can be deposited on the surface of the support in the form of, for example, a sheet, foam, gel or paste. The solid aerosol forming substrate can be deposited on the entire surface of the support, or alternatively, it can be deposited in a pattern to provide a non-uniform flavor during use.
    [0035] In preferred embodiments the aerosol-forming substrate comprises one or more sheets of homogenized tobacco material that has accumulated in a bar, circumscribed by a wrapper, and sectioned to provide individual plugs of aerosol-forming substrate.
    [0036] Cigarette paper can be any non-tobacco material suitable for wrapping the components of a smoking article in the form of a bar. The cigarette paper must grasp the component elements of the smoking article when the article is assembled to keep them in position within the bar. Suitable materials are well known in the art.
    [0037] The smoking article can be substantially cylindrical in shape. The smoking article can be substantially elongated. The smoking article can have a length and a circumference substantially perpendicular to the length. The aerosol forming substrate can be substantially cylindrical in shape. The aerosol forming substrate can be substantially elongated. The aerosol forming substrate can also have a length and circumference substantially perpendicular to the length. The aerosol-forming substrate can be received within the aerosol-generating device so that the length of the aerosol-forming substrate is substantially parallel to the direction of air flow within the aerosol-generating device.
    [0038] The smoking article can have a total length between approximately 30 millimeters and approximately 100 millimeters. The smoking article can have an outside diameter between approximately 5 millimeters and approximately 12 millimeters. The smoking article may comprise a filter or nozzle. The filter may be located at the downstream end of the smoking article. The filter can be a cellulose acetate filter plug. The filter is approximately 7 millimeters long in one mode, but can be between 5 millimeters and approximately 14 millimeters in length.
    [0039] In one embodiment, the smoking article has a total length of approximately 45 millimeters. The smoking article can have an outside diameter of approximately 7.2 mm. In addition, the aerosol forming substrate may be approximately 10 millimeters long. Alternatively, the aerosol forming substrate may be approximately 12 millimeters long. In addition, the diameter of the aerosol forming substrate can be between approximately 5 millimeters and approximately 12 millimeters. In addition, the smoking article may comprise a separation between the aerosol forming substrate and the filter plug. The separation can be approximately 18 millimeters, but can be in the range of approximately 5 millimeters to approximately 25 millimeters.
    [0040] In another embodiment, a method for using, consuming or smoking a smoking article comprising a plurality of elements assembled in the form of a bar is provided. The elements mounted in the shape of the bar include a front plug and an aerosol-forming substrate. The method involves the steps of inserting a heating element into the smoking article through the front plug, increasing the temperature of the heating element to heat the aerosol forming substrate sufficiently to form an aerosol, and removing the heating element from the article smoking.
    [0041] The aerosol generated by heating the aerosol-forming substrate can be inhaled by the user. The bar can be defined as having a mouth end and a more distant end located upstream of the mouth end. Typically, a user applies his lips to the mouth end of the bar and inhales at the same time that the aerosol-forming substrate is heated by the heating element. Air and any aerosol generated inside the bar are sucked through the mouth end of the bar to be inhaled by the user.
    [0042] In some embodiments, the heating element is placed in direct contact with the aerosol forming substrate, and in some embodiments, the heating element is inserted into the aerosol generating substrate. As described above, the aerosol forming substrate can adhere to the heating element. The aerosol forming substrate can also contract after heating which can cause it to lose contact with the cigarette paper and become loose inside the bar. In such circumstances, the aerosol forming substrate is likely to be removed from the bar when the heating element is removed. Thus, the method can provide a step in which the front plug prevents egress of the aerosol-forming substrate as the heating element is removed from the smoking article. The aerosol-forming substrate can move inside the bar towards the front plug and enforce the front plug. This impingement can allow the adhesion between the heating element and the aerosol forming substrate to be overcome, thereby allowing the heating element to be removed from the smoking article.
    [0043] The method may involve a step in which the heating element pierces the front plug. The heating element may be in the form of a pin or blade and may have a sharp end to allow the front plug to be pierced.
    [0044] The method may involve a step in which the heating element is inserted through a hole or slot defined in the front plug.
    [0045] As described above, fragments of the aerosol forming substrate can adhere to the heating element. Furthermore, residues of the aerosol-forming substrate or residues derived from the aerosol-forming substrate can be deposited or formed on the heating element. The method may involve a step in which a surface of the heating element is scraped as the heating element is removed from the smoking article. Such scraping is carried out by interference between a surface of the heating element and the material that forms the front plug.
    [0046] The heating element will typically be a heating element of an aerosol generating device compatible with the smoking article. The characteristics described in relation to one modality may also be applicable to other modalities. For example, the method for using a smoking article can be used in conjunction with any smoking article described above.
    [0047] Specific modalities will now be described with reference to the figures, in which:
    [0048] Figure 1 is a schematic cross-sectional diagram of a smoking article according to a first embodiment coupled with an aerosol generating device;
    [0049] Figure 2 is a schematic diagram showing a front end projection of the smoking article according to the first embodiment, showing the penetration of the front plug of the smoking article by a heating element;
    [0050] Figure 3A is a schematic diagram showing a front end projection of a smoking article according to a second embodiment, showing the penetration of the front plug of the smoking article by a heating element;
    [0051] Figure 3B is a schematic diagram illustrating a front end projection of a smoking article according to a third embodiment, showing the penetration of the front plug of the smoking article by a heating element; and
    [0052] Figure 3C is a schematic diagram illustrating a front end projection of a smoking article according to a fourth embodiment, showing the penetration of the front plug of the smoking article by a heating element.
    [0053] Figure 1 illustrates a smoking article 1 according to a first modality. Smoking article 1 comprises five elements, a front plug 2, an aerosol-forming substrate 7, a hollow cellulose acetate tube 6, a transfer section 4, and a nozzle filter 3. These five elements are arranged sequentially and in coaxial alignment and are mounted by cigarette paper 5 to form a bar 15. The bar has a mouth end 20, which a user inserts into his mouth during use, and a more distant end 30 located at the opposite end from the bar 15 to the mouth end 20. The elements located between the mouth end 20 and the farthest end 30 can be described as being upstream of the mouth end 20 or, alternatively, downstream of the farthest end 30.
    [0054] When assembled, the bar 15 is 52 mm long and has a diameter of 7.2 mm.
    [0055] The front plug 2 is a cylindrical portion of cellulose acetate fiber that has a length of 7 millimeters. The fibers of the cellulose acetate fiber are aligned with the longitudinal direction of the bar 15.
    [0056] The aerosol forming substrate 7 is located downstream of the front plug 2 and comprises a bundle of wrinkled fused sheet tobacco wrapped in filter paper. Fused leaf tobacco includes additives, including glycerin as an aerosol-forming additive.
    [0057] Tube 6 is located immediately downstream of the aerosol-forming substrate 7 and is formed from cellulose acetate. Tube 6 defines an opening that has a diameter of 3.3 mm. A function of the tube 6 is to locate the aerosol forming substrate 7 towards the farthest end 30 of the bar 15 so that it can be contacted with a heating element. The tube 6 acts to prevent the aerosol forming substrate 7 from being forced along the bar 15 towards the mouth end 20 when a heating element is inserted.
    [0058] Transfer section 4 comprises a thin-walled tube 18 mm long. The transfer section 4 allows volatile substances released from the aerosol forming substrate 7 to pass along the bar 15 towards the mouth end 20. The volatile substances can cool within the transfer section 4 to form an aerosol.
    [0059] The nozzle filter 3 is a conventional nozzle filter formed from cellulose acetate fiber that has a length of 7 millimeters.
    [0060] The five elements identified above are assembled by being tightly wrapped within a cigarette paper 5. Cigarette paper 5 in this specific embodiment is a conventional cigarette paper. For example, cigarette paper may be a porous material with a non-isotropic structure comprising cellulose fibers (crossing fibers interconnected by hydrogen bonds), one or more fillers and one or more combustion agents. The one or more fillers can be, for example, calcium carbonate (Ca-CO3) and the one or more combustion agents can be, for example, one or more of the following: potassium / sodium citrate; sodium acetate; mono-ammonium phosphate (MAP); and disodium phosphate (DSP). The final composition of the cigarette paper per square meter can be approximately 25 g of cellulose fibers, 10 g of calcium carbonate, and 0.2 g of combustion agent. The porosity of the cigarette paper can be between approximately 0 Coresta and approximately 120 Corta. The interface between the cigarette paper 5 and each of the elements locates the elements and defines the bar 15 of the smoking article 1.
    [0061] Although the specific modality described and illustrated in Figure 1 has five elements mounted on cigarette paper, it will now be clear to someone skilled in the art that a smoking article according to the modalities discussed here may have additional elements and these elements can be mounted in an alternative or equivalent cigarette wrap. Likewise, a smoking article according to the modalities discussed here may have less elements. Furthermore, it will now be apparent to someone skilled in the art that several dimensions for the elements discussed in relation to the various modalities discussed here are merely exemplary, and that suitable alternative dimensions for the various elements can be chosen without departing from the spirit of the modalities discussed here.
    [0062] The smoking article of the first modality is consumed or smoked in conjunction with a suitable aerosol generating device. Figure 1 illustrates the smoking article when coupled with such a device 11 for consumption.
    [0063] The aerosol generating device 11 comprises a sheath 12 for receiving smoking article 1 for consumption. A heating element 8 is located inside the sheath 12 and positioned to couple with the farthest end 30 of the smoking article 1. The heating element 8 is formed in the form of a blade that ends at a tip 40.
    [0064] As the smoking article 1 is pushed into the sheath 12 the tip 40 of the heating element 8 engages with an external surface of the front plug 2. Applying a force to the smoking article 1, the heating element 8 penetrates the front plug 2 and the tip 40 of the heating element 8 is then brought into contact with the aerosol-forming substrate 7. Applying additional pressure causes the heating element 8 to penetrate the aerosol-forming substrate 7. A further penetration is prevented as the farthest end 30 of the smoking article 1 touches an end wall of the sheath 12, which acts as a stop.
    [0065] When the smoking article 1 is properly coupled with the aerosol generating device 11, the heating element 8 has been inserted through the front plug 2 and is located inside the aerosol forming substrate 7 in contact with the material aerosol formation. An insulating collar 9 may surround a portion of the heating element 8 which is in contact with the front plug 2. The collar 9 may alternatively be a cold zone provided over the length of the heating element 8. Such a collar may prevent the element heating element 8 burn or melt the front plug 2.
    [0066] Figure 2 is a front end view of smoking article 1 when coupled with the heating element 8. This view shows the cigarette paper 5 in contact with the front plug 2. The heating element 8, which can be seen having a blade-shaped cross section, it was inserted through the front plug 2. The heating element 8 deformed the cellulose acetate material that forms the front plug 2 slightly, and the resilience of this cellulose acetate material results there is a firm contact between the front plug 2 and the outer surfaces of the heating element 8.
    [0067] The aerosol generating device 11 comprises a power supply and an electronics (not shown) that allow the heating element 8 to be actuated. Such actuation can be manually operated or can occur automatically in response to a user aspirating on the smoking article 1. When the heating element 8 is actuated, the aerosol forming substrate 7 is heated and volatile substances are generated or developed. As a user aspirates over the mouth end 20 of the smoking article 1, air is drawn into the smoking article 1 and the volatile substances condense to form an inhalable aerosol. This aerosol passes through the mouth end 20 of the smoking article 1 and into the user's mouth.
    [0068] The heating element 8 is heated to a temperature of approximately 375 degrees Celsius in order to generate an aerosol from the aerosol-forming substrate 7. As the volatile substances are driven out of the aerosol-forming substrate 7 by heat, the aerosol forming substrate 7 dries and shrinks. This can result in the aerosol-forming substrate 7 gripping the heating element 8. Simultaneously, the shrinkage of the aerosol-forming substrate 7 can cause a loss of contact with the cigarette paper 5. In the first embodiment, the aerosol-forming substrate 7 is in the form of a plug, and the shrinkage causes this plug to become loose within the bar 15 of the smoking article 1.
    [0069] After use, the user removes the smoking article 1 from the aerosol generating device 11.0 Smoking article 1 is removed from the sheath 12 and the heating element 8 slides out of the front plug 2. As the grip between the heating element 8 and the aerosol forming substrate 7 is greater than the adhesion between the aerosol forming substrate 7 and the cigarette paper 5, the aerosol forming substrate 7 moves towards the farthest end 30 with the heating element 8. However, the front plug 2 blocks the path of the aerosol forming substrate 7. This allows the heating element 8 to be removed from the aerosol forming substrate 7 without removing the aerosol forming substrate 7 from the smoking article 1.
    Particles of the aerosol-forming substrate 7 or residues derived from the aerosol-forming substrate 7 may become trapped in the heating element 8 during operation. As the heating element 8 is removed from the smoking article 1, the outer surface of the heating element 8 is scraped by the front plug 2. Thus, the heating element 8 is automatically scraped off each time a smoking article 1 is removed from the aerosol generating device 11.
    [0071] The first embodiment described above with reference to Figures 1 and 2 describes a smoking article 1 which has its farthest end 30 closed by a solid front plug 2. Such a front plug 2 requires a heating element 8 to be forced through the front plug 2 to contact the ae-rossol forming substrate 7.
    [0072] A second embodiment of a smoking article 100 is illustrated in Figure 3A (end view only). The smoking article 100 of Figure 3A is identical to the smoking article 1 of the first embodiment described above, less than the configuration of the front plug 102. The front plug 102 is formed of cellulose acetate and is mounted in contact with a cigarette paper 5 , but the front plug 102 defines a substantially circular hollow hole 103 that allows a through access to a heating element of an aerosol generating device. The heating element can pass through the front plug 102 with a minimum required insertion force. The circular shape of the hole 103 means that there is no special orientation relationship required between the smoking article 100 and the heating element in order to couple the smoking article 100 with the aerosol generating device.
    [0073] In use, the front plug 102 of the smoking article 100 acts in the same manner as described above to prevent the egress of an aerosol-forming substrate from the smoking article 100.
    [0074] A third embodiment of a smoking article 200 is illustrated in Figure 3B (end view only). The smoking article 200 of Figure 3B is identical to the smoking article 1 of the first embodiment described above except the configuration of the front plug 202. The front plug 202 is formed of cellulose acetate and is mounted in contact with a cigarette paper 5 , but the front plug 202 defines a number of slots 203 that allows through access to a heating element of an aerosol generating device. Slots 203 decrease the insertion force required to insert a heating element into smoking article 200.
    [0075] In use, the front plug 202 of the smoking article 200 acts in the same manner as described above to prevent the egress of an aerosol-forming substrate from the smoking article 200. Furthermore, the cracks 203 impose on the smoking element heating and effectively scrape an outer surface of the heating element when the heating element is removed from the smoking article 200, providing a cleaning effect as described above.
    [0076] A fourth embodiment of a smoking article 300 is illustrated in Figure 3C (end view only). The smoking article 300 of Figure 3C is identical to the smoking article 1 of the first embodiment described above, less than the configuration of the front plug 302. The front plug 302 is formed of cellulose acetate and is mounted in contact with a cigarette paper 5 , but the front plug defines a star-shaped hole 303 that allows through access to a heating element of an aerosol generating device. The hole decreases the insertion force required to insert a heating element into the smoking article 300. The hole shape 303 allows the heating element to engage with the front plug 302 of the smoking article 300 and prevent the rotation of the smoking article 300 while it is being consumed.
    [0077] In use, the front plug 302 of the smoking article 300 acts in the same manner as described above to prevent the egress of an aerosol-forming substrate from the smoking article 300.
    [0078] Although described above as formed from cellulose acetate, it will now be clear to someone skilled in the art that the front plugs 2, 102, 202, and 302 of the smoking articles could alternatively be formed from any suitable material or combination of materials. For example, the front plug can only be comprised of tobacco, a substantially comprised tobacco material, or a combination of tobacco or a substantially comprised tobacco material with another suitable material. Such suitable materials and material combinations will now be apparent to someone skilled in the art.
    [0079] The exemplary modalities described above are not limiting. In view of the exemplary modalities discussed above, other modalities consistent with the exemplary modalities above will now be apparent to someone skilled in the art.
    权利要求:
    Claims (9)
    [0001]
    1. Smoking article (1, 100, 200, 300) comprising a plurality of cylindrical elements, including a front plug (2, 102, 202, 302) and an aerosol forming substrate (7), mounted in contact with a cigarette paper (5) to form a bar (15), the cigarette paper holding the elements in position by an interference interaction, the bar (15) having a mouth end (20) and a more distant end (30 ) upstream of the mouth end (20), in which the front plug (2, 102, 202, 302) is between 1 mm and 10 mm long and is located upstream of the aerosol forming substrate (7) within the bar (15), the front plug being penetrable by a heating element (8) of an aerosol generating device (11) so that the heating element (8) can be inserted into the smoking article (1, 100, 200, 300) through the front plug (2, 102, 202, 302) and contact the aerosol forming substrate (7), characterized by the fact that the plug f The front (102, 202, 302) defines a hole (103, 303) or a slot (203) through which the heating element (8) can pass.
    [0002]
    A smoking article according to claim 1, characterized in that the front plug is substantially cylindrical and has a diameter of 5 mm or greater and a length of at least 2 mm.
    [0003]
    Smoking article (1, 100, 200, 300) according to claim 1 or 2, characterized in that it still comprises a filter (3) located at the mouth end (20) of the bar (15).
    [0004]
    Smoking article (1, 100, 200, 300) according to any one of claims 1 to 3, characterized in that the front plug (2, 102, 202, 302) comprises a filter material such that the Air can be sucked in through the front plug (2, 102, 202, 302).
    [0005]
    Smoking article according to any one of claims 1 to 4, characterized in that the front plug comprises an aerosol-forming substrate material.
    [0006]
    A smoking article according to claim 5, characterized in that the aerosol forming substrate material comprises processed tobacco.
    [0007]
    Smoking article (1) according to any one of claims 1 to 6, characterized in that the front plug (2) is formed of a perforable material.
    [0008]
    Smoking article (1, 200) according to any one of claims 1 to 7, characterized in that the front plug (2, 202) is configured to scrape a surface of the heating element (8) according to the element heating element (8) is removed from the smoking article (1,200).
    [0009]
    Smoking article (1, 100, 200, 300) according to any one of claims 1 to 8, characterized in that the front plug (2, 102, 202, 302) is configured to prevent the egress of the substrate aerosol forming device (7) as the heating element (8) is removed from the smoking article (1, 100, 200, 300).
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    同族专利:
    公开号 | 公开日
    EP2797450B1|2017-11-22|
    SI2797450T1|2018-01-31|
    KR102170769B1|2020-10-29|
    RU2014131460A|2016-02-20|
    RU2609191C2|2017-01-30|
    SG11201403730SA|2014-10-30|
    LT2797450T|2018-01-10|
    ZA201402754B|2015-03-25|
    CN110353311A|2019-10-22|
    CA2862048C|2021-03-02|
    PT2797450T|2018-02-21|
    HK1198110A1|2015-03-13|
    US20140345634A1|2014-11-27|
    MX2014008093A|2014-10-06|
    BR112014013198A2|2017-06-13|
    CN104039183A|2014-09-10|
    IL232368A|2021-02-28|
    PL2797450T3|2018-03-30|
    RS56648B1|2018-03-30|
    HUE034783T2|2018-02-28|
    WO2013098410A3|2014-03-27|
    JP6227555B2|2017-11-08|
    NO2797450T3|2018-04-21|
    MY167418A|2018-08-27|
    AU2012360832A1|2014-08-21|
    EP2797450A2|2014-11-05|
    NZ628006A|2016-05-27|
    JP2015503337A|2015-02-02|
    KR20140119063A|2014-10-08|
    CA2862048A1|2013-07-04|
    AU2012360832B2|2016-11-24|
    MX353883B|2018-02-01|
    UA115437C2|2017-11-10|
    WO2013098410A2|2013-07-04|
    ES2650916T3|2018-01-23|
    IL232368D0|2014-06-30|
    CN104039183B|2019-07-23|
    DK2797450T3|2017-12-11|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-07-07| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-11-10| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11196204|2011-12-30|
    EP11196204.9|2011-12-30|
    PCT/EP2012/077092|WO2013098410A2|2011-12-30|2012-12-28|Smoking article with front-plug and method|
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