• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    METHOD FOR FORMING ITEMS TO SMOKE WITH CAVITIES AT THE MOUTH END. The present invention relates to a method for producing smoking articles, the method comprising a first step of supplying a continuous set of the first filter members (42), second filter segments (20) and tubular members (40) ). A tubular member (40) is provided between each pair of first consecutive filter members (42) and a second filter segment (20) is provided between each first filter member (42) and each tubular member (40). Each second filter segment (20) contains one or more breakable capsules, each breakable capsule comprising an outer coating and an inner core containing an additive. Then, the continuous assembly of the first filter members (42), second filter segments (20) and tubular members (40) is packed with a plug packaging web (44) to form a packaged filter assembly , wherein the plug pack (44) has a base weight of less than 90 grams per square meter. The packaged filter assembly is cut in an intermediate position along each first filter member (42) in order to provide multiple filter rods, with each filter rod comprising two first segments of (...).
    公开号:BR112015001803B1
    申请号:R112015001803-3
    申请日:2013-07-19
    公开日:2020-12-22
    发明作者:Alen Kadiric
    申请人:Philip Morris Products S.A.；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a method for forming smoking articles, each having a mouth end cavity formed by a hollow tube segment.
    [0002] Filter cigarettes typically comprise a cylindrical tobacco cutting reinforcement rod surrounded by a paper wrapper and a cylindrical filter axially aligned in a supporting relationship from one end to the other with the packaged tobacco rod. Typically, the cylindrical filter comprises a filtration material circumscribed by a plug pack. Conventionally, the packaged tobacco rod and the filter are joined by a strip of tipped wrapper, normally formed by an opaque paper material that circumscribes the entire length of the filter and an adjacent part of the packaged tobacco rod.
    [0003] Several smoking articles in which tobacco is heated instead of being burned have also been proposed in the art. In heated smoking articles, an aerosol is generated by heating a substrate that generates flavor, such as tobacco. Known heated smoking articles include, for example, electrically heated smoking articles and smoking articles in which an aerosol is generated by transferring heat from a flammable fuel element or heat source to a physically separate aerosol that forms material . During smoking, volatile compounds are released from the aerosolized substrate by transferring heat from the fuel element and enters the air extracted through the smoking article. As the released compounds cool, they condense to form an aerosol that is inhaled by the consumer. Smoking articles in which an aerosol containing nicotine is generated from a tobacco material, tobacco extract or other source of nicotine, without burning or heating, are also known.
    [0004] Sometimes, it is desirable to provide the filter section of an article for smoking with a cavity in the mouth end. However, these mouth-end cavities are prone to shrink or deform during the manufacture of the smoking article and during subsequent handling by the consumer, particularly when the filtration material includes one or more flavor-containing materials that must be activated. squeezing the filter before smoking.
    [0005] Therefore, it would be desirable to provide a process for forming smoking articles having mouth-end cavities, wherein the cavities are resistant to deformation and shrinkage during the manufacture and subsequent handling of the smoking article.
    [0006] Accordingly, the present invention provides a method for producing smoking articles, the method comprising a first step for providing a continuous set of first filter members, second filter segments and tubular members. A tubular member is provided between each pair of first consecutive filter members and a second filter segment is provided between each first filter member and each tubular member. Each second filter segment contains one or more breakable capsules, each breakable capsule comprising an outer coating and an inner core containing an additive. The continuous set of first filter members, second filter segments and tubular members is packed with a plug packaging web to form a packaged filter assembly, where the plug packaging has a base weight of less than 90 grams per square meter. The packaged filter assembly is cut in an intermediate position along each first filter member to provide multiple filter rods, each filter rod comprising two first filter segments, a tubular member positioned between the first filter segments and a second filter segment provided between each first filter segment and the tubular member. Then, a tobacco rod is provided in axial alignment and adjacent to each first filter segment of one of the filter rods, and the filter rod and part of each tobacco rod are packaged in a tipped wrapper. Finally, the tipped casing and the filter rod are cut in an intermediate position along the length of the tubular member to form multiple smoking articles, each smoking article comprising a tobacco rod connected to a filter, in that each filter comprises a first filter segment downstream of the tobacco rod, a second filter segment downstream of the first filter segment and a hollow tube segment positioned between the second filter segment and the mouth end of the filter. The hollow tube segment defines a cavity at the mouth end of the filter.
    [0007] Preferably, the hollow tube segment extends from the downstream end of the adjacent filter segment to the mouth end edge of the filter.
    [0008] As used herein, the terms "upstream" and "downstream" are used to describe the relative positions of the elements or parts of the elements of a smoking article in relation to the direction in which a user brings the article to smoking while using it. Smoking articles, as described in this document, comprise one end downstream and one end opposite and upstream. In use, a user brings in the downstream end of the article to smoke. The downstream end, which is also described as the mouth end, is downstream of the upstream end, which can also be described as the distal end.
    [0009] Using tubular members on the filter rods, the method according to the present invention advantageously produces smoking articles, each having a mouth-end cavity that is resistant to shrinkage or deformation during manufacture. In particular, the tubular members provide sufficient mechanical rigidity to resist deformation when cutting the packaged filter assembly to form each filter rod and during cutting the tubular members to form the smoking articles. By providing this resistance to deformation with tubular members, the present invention eliminates the need to use hard, high-base plug packages and tipped wrappers that may otherwise be necessary to prevent cavities from retracting. These base-weight plug packs and tipped wrappers are undesirable, as they can become wrinkled or bent during the manufacture of filter rods and smoking articles. High base weight plug packaging and tipped wrappers can also add other costly steps in the manufacturing process, such as the need for laser drilling ventilation online. In addition, high base weight plug packs and tipped wrappers can make it difficult for a consumer to deform the filter in order to break one or more capsules contained therein. By eliminating the need for these base weight plug packs and tipped wrappers and forming the mouth end cavity using a hollow tube segment, smoking articles, produced in accordance with the present invention, allow a consumer easily deforms the filter in the second filter segment in order to break one or more capsules contained therein, while ensuring that the mouth end cavity is sufficiently resistant to deformation or retraction.
    [00010] The used plug packaging web has a base weight of less than about 90 gsm, preferably less than about 60 gsm, most preferably less than about 40 gsm. Preferably, the plug pack has a base weight of more than about 20 gsm.
    [00011] In some embodiments, it may be desirable to include additional segments of filtration material in each smoking article. Advantageously, the method according to the present invention can be easily adapted to accommodate such multiple segment filter rods by inserting the required number of additional filter segments between each first filter member and each tubular member. Regardless of the number of different filter segments used to form the packaged filter assembly, the filter segments adjacent to each end of each tubular member are preferably the same, that is, they preferably have the same composition.
    [00012] Preferably, the filtration material within each filter segment is a plug of fibrous filtration material, such as tow or cellulose acetate paper. A filter plasticizer can be applied to the fibrous filtration material in a conventional manner, spraying on the separated fibers, preferably before applying any additional material to the filtration material. Smoking articles produced in accordance with the present invention may include a variety of different types of filter segments or combinations of filter segments that are known to the person skilled in the art, including restrictors and segments that are used to adjust resistance drag (RTD). Alternatively or in addition, smoking articles produced in accordance with the present invention may include one or more carbon-containing segments, preferably a carbon-containing rod end segment.
    [00013] In some cases, it may be desirable to provide the filter with means for releasing a flavor enhancer or other requested additive, usually by manual release by the consumer just before smoking the smoking article. Therefore, the method may further comprise a step for providing a material containing flavor enhancer in a filter segment of the filter. The material containing flavor enhancer can be added to the first filter segment. Additionally or alternatively, the material containing flavor enhancer can be added to the second filter segment.
    [00014] In some embodiments, the material containing flavor enhancer comprises one or more breakable capsules contained within the second filter segment. Preferably, the second filter segment comprises one or more burstable capsules dispersed within a fibrous filtration material.
    [00015] In embodiments comprising a material containing flavor enhancer, a filter segment that incorporates the flavor containing material is preferably circumscribed by a plug package which is substantially impermeable to the flavor enhancing additive. This advantageously inhibits the transfer of the additive through the plug packaging out of the filter, where it can unwantedly come into contact with the consumer's fingers when the filter is incorporated into a smoking article.
    [00016] In order to further improve the resistance of each tubular member to deformation during the manufacture of filter rods and smoking articles, the wall of each tubular member preferably has a thickness of at least about 100 micrometers, more preferably at least least about 150 micrometers. Alternatively or in addition, the wall thickness is preferably less than about 500 micrometers, more preferably less than about 350 micrometers, most preferably less than about 250 micrometers.
    [00017] Preferably, each tubular member has a length of at least about 4 mm. This not only provides an appropriately sized mouth end cavity, but also ensures sufficient overlap between the tubular member and the plug package to keep the tubular member in axial alignment with the adjacent filter segment. Additionally or alternatively, each tubular member is preferably less than about 30 mm in length.
    [00018] In some embodiments, each tubular member may comprise a coating layer on an internal surface thereof. A coating layer can help inhibit the absorption of moisture in the tubular member during the smoking of the smoking article, therefore maintaining the resistance of the mouth end cavity to deformation. Suitable coating materials include, but are not limited to, waxes, polymeric materials and combinations thereof. In particular, suitable waxes include vegetable waxes and, in particular, other suitable materials are ethyl cellulose and nitrocellulose.
    [00019] In some embodiments, the tubular members may be formed from a polymeric material or a paper material. For example, tubular members can be formed from extruded plastic tubes. Preferably, the tubular members are formed from a plurality of overlapping layers of paper, such as a plurality of parallel rolled paper layers or a plurality of spiral wound paper layers that can further increase the resistance of the tubular members to deformation or retraction. . Preferably, each tubular member comprises at least two layers of paper. Alternatively or additionally, each tubular member preferably comprises less than eleven layers of paper.
    [00020] An exemplary method for forming a tubular member from a plurality of rolled paper layers comprises packaging a plurality of substantially continuous strips of paper in an overlapping manner relative to a cylindrical mandrel. The strips are packed in a parallel or spiral manner to form a substantially continuous tube in the mandrel. The formed tube can be rotated in relation to the mandrel, for example, using a rubber belt, so that the layers of paper are continuously extracted and packed around the mandrel. Then the formed tube can be cut into the necessary tubular members downstream of the mandrel.
    [00021] To inhibit the transfer of moisture from one paper layer to the next during the smoking of the smoking article, the adjacent paper layers of each tubular member are preferably adhered to each other by an intermediate layer of adhesive which provides a barrier for the transfer of moisture between layers. This can happen in addition or as an alternative to a coating provided on an inner surface of each tubular member, as described above. Additionally or alternatively, this coating can be provided between adjacent layers of the tubular member.
    [00022] The first cutting step comprises cutting the packaged filter assembly in an intermediate position along the length of each first filter member, so that each filter rod comprises a single tubular member positioned between the first two filter segments . Each filter rod is used to produce two smoking article filters by cutting the filter rod in an intermediate position along the length of the tubular member. Therefore, these filter rods can be known as double filter rods.
    [00023] Double filter rods can be formed directly from the packaged filter set by cutting the first consecutive filter members. Alternatively, the cutting step may comprise a first step for cutting the packaged filter assembly in an intermediate position along the length of each first filter member (that is, cutting a first filter member, not cutting the next first filter member) filter, cut the next first filter member, do not cut the next filter member, and so on) to form filter rods, each of which comprises two tubular members positioned between two first filter segments and a single first member filter positioned between the two tubular members. These filter rods can be known as quadruple filter rods. In order to form the smoking articles, the quadruple filter rods are cut in an intermediate position along the length of the first filter member to form two double filter rods and the two double filter rods are used to form four smoking articles.
    [00024] Smoking articles formed according to the methods described above may differ between the ovalization of the pipe segment after a deformation of 50% of the filter and the ovalization of the pipe segment before deformation of the filter less than about 25%, preferably less than about 20%. For example, where the ovalization of the pipe segment before deformation is 5%, the ovalization of the pipe segment after 50% deformation of the filter is preferably less than 30%, more preferably less than 25%. Therefore, the pipe segment provides a mouth end cavity that is resistant to shrinkage or deformation. The particular test procedure for performing strain on the filter according to the present invention is described in detail below.
    [00025] The term "ovalization", as used in this document, means the degree of deviation from a perfect circle. The ovalization is expressed as a percentage and the mathematical definition is given below.

    [00026] To determine the ovalization of a segment of a smoking article (such as the hollow pipe segment), the mouth end is seen along the longitudinal direction of the smoking article. For example, the smoking article can be positioned on its mouth end in a transparent stage, so that an image of the article's mouth end is recorded by a suitable imaging device located below the stage. Dimension "a" is taken as the largest outside diameter of the segment at its downstream end and dimension "b" is taken as the smallest outside diameter of the segment at its downstream end. The process is repeated for a total of ten smoking articles that have the same model and the same average number of the ten ovalization measurements is recorded as the ovalization for that smoking article model.
    [00027] Since the smoking article filters are generally circular in cross-section, the ovalization of the hollow tube segment after a 50% deformation is preferably less than about 25%, more preferably less than about 20% . In this case, the mouth end cavity of the smoking article retains or recovers a generally circular cross-section, even after 50% deformation of the filter. Alternatively or in addition, the ovalization of the tube segment after a 67% deformation of the filter is preferably less than about 35%, more preferably less than about 30%.
    [00028] In some embodiments, the ovalization of the hollow tube segment after a 50% deformation of the filter performed after the smoking article is subjected to a smoke test is preferably less than about 35%, more preferably less than about 30%. Alternatively or additionally, the ovalization of the tube segment after a 67% deformation of the filter carried out after the smoking article is subjected to a smoke test is preferably less than about 45%, more preferably less than about 40% . This provides advantageously solidity in the ovalization of the mouth end cavity during the smoking of the smoking article.
    [00029] The smoke test used to test smoking articles according to the present invention is described in detail below. Where it is necessary to measure ovalization after strain tests performed both before and after smoking, two samples of smoking articles that have the same model should be used. That is, a smoking article that has not been smoked, not deformed, should be used for the pre-smoke deformation test and non-deformed articles that have the same model are subjected to the smoke test and are used for the deformation test. post-smoking.
    [00030] In order to increase the resistance of the hollow tube segment to crushing, the filter preferably has a compression resistance of smokeless article of at least about 20 Newtons in 50% compression. Alternatively or additionally, the compressive strength of smokeless article of the 50% compression filter is preferably less than about 50 Newtons. The term "compressive strength" is a measure of the force required to provide a particular compression of the filter section of the smoking article. The compressive strength is measured using the compressive strength test described in detail below, where the compressive strength of a given smoking article model is the average number of compressive strength measurements for a sample of ten smoking articles that have the same model.
    [00031] When the smoking article includes a filter segment comprising one or more breakable capsules, as described above, the ovalization of the tube segment is preferably less than 35%, more preferably less than 30%, after a test capsule crushing in which a force corresponding to the crushing resistance of one or more capsules is applied to the smoking article. The crushing resistance of a capsule corresponds to the compression force required to break the capsule and release the additive contained within the capsule when the capsule is disposed within the filter segment. The capsule crush test is described in detail below.
    [00032] When the capsule crush test is performed after the smoking article is subjected to a smoke test, the ovalization of the pipe segment is preferably less than about 45%, more preferably less than about 40% , after the capsule crush test.
    [00033] The tipped wrapper may comprise paper having a basis weight of less than about 70 gsm, preferably less than about 50 gsm. Preferably, the tipped casing has a base weight greater than about 20 gsm.
    [00034] The smoking articles produced in accordance with the present invention can be filter cigarettes or other smoking articles in which the tobacco material is burned in order to form smoke. Alternatively, smoking articles can be articles in which the tobacco material is heated to form an aerosol, rather than being burned. In a type of heated smoking article, the tobacco material is heated by one or more electrical heating elements in order to produce an aerosol. In another type of heated smoking article, an aerosol is produced by transferring heat from a flammable or chemical heat source to a physically separate tobacco material that can be located inside, around or downstream of the heat source. The present invention also encompasses smoking articles in which a nicotine-containing aerosol is generated from a tobacco material without burning or heating. Test Procedures Strain and Compression Strength Test
    [00035] The smoking article to be tested is positioned between a smooth surface and a circular plate opposite the smooth surface, the circular plate having a diameter of 10 mm. The edge of the circular plate closest to the mouth end of the smoking article is positioned 8 mm from the mouth end. The filter is then compressed by moving the circular plate towards the smooth surface at a constant speed of 100 mm per second. The force applied by the circular plate is increased until the desired deformation of the smoking part of the article between the circular plate and the smooth surface is achieved. For example, to achieve a 50% deformation, the compressed part of the smoking article is compressed to a diameter of 50% of the diameter of that part before compression. Similarly, to achieve a 67% deformation, the smoking article is compressed until the compressed part is reduced to a diameter of 33% of the diameter of that part before compression. The diameter is measured in the direction of compression which is the direction that extends between the smooth surface and the circular plate. Once the desired compression is achieved, the force required to provide that compression is not seen as the compression force of the filter. Then, the circular plate is retracted, so that the compression force is removed. The smoking article is left for 30 seconds to expand before any additional tests or measurements are performed. Smoke Test
    [00036] To simulate the smoking of a smoking article, the smoking article is subjected to a standard smoke test under ISO conditions (35ml puff that lasts 2 seconds each, every 60 seconds). In the ISO test method, the smoking article is smoked with the ventilation zone completely uncovered. Capsule Crush Test
    [00037] In order to carry out a capsule crush test, according to the present invention, a smoking article that includes a burstable capsule is positioned between a lower plate that has a diameter of 150 mm and an upper plate that has a diameter of 20 mm. The part of the smoking article that houses the bursting capsule is positioned between the two plates, so that the plates are centered on the location of the capsule. Then, the smoking article and the capsule are compressed by moving the upper plate towards the lower plate at a constant speed of 30 mm per minute. The force applied by the upper plate is increased until the capsule breaks, at which point the maximum compression load applied by the upper plate is recorded as the crushing strength of the capsule. The test is completed when the maximum compression load is reached and then the upper plate is retracted to remove the compression force from the smoking article. The smoking article is allowed to expand for 30 seconds before any additional tests or measurements are performed, such as ovalization measurements.
    [00038] The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which: Figure 1 shows a method for forming a plurality of smoking article filter rods, according to the present invention; Figure 2 shows a double filter rod; Figure 3 shows a quadruple filter rod; Figure 4 shows an exemplary method for forming a smoking article using a double filter rod, in accordance with the present invention; Figure 5 shows a smoking article produced according to the method shown in Figure 4; Figure 6 shows the mouth end of the smoking article of Figure 5 with the filter unpacked; and Figure 7 shows an exemplary method for forming a tubular member.
    [00039] Figure 1 illustrates a process for forming a plurality of smoking article filter rods according to the invention. A substantially continuous set of filter components is formed by providing a plurality of tubular members 40, a plurality of flavor-containing filter segments 20 and a plurality of rod end filter members 42. A tubular member 40 is provided between each pair of consecutive rod end filter members 42 and a flavor-containing filter segment 20 is provided between each rod end filter member 42 and each tubular member 40. Next, the substantially continuous set of filter components is packaged on a plug packaging web 44 to form a packaged filter assembly.
    [00040] In order to form a plurality of filter rods, a plurality of first cuts 46 is made through at least some of the rod end filter members 42 of the packaged filter assembly, each first cut 46 positioned in a position intermediate along the length of the respective rod end filter member 42. The resilience of each tubular member 40 advantageously prevents the retraction of the cavities defined therein during the cutting and subsequent handling of the filter rods and any articles for smoking that incorporate filters made from the filter rods.
    [00041] In order to form a double filter rod, as shown in Figure 2, the packaged filter assembly is cut through each rod end filter member 42 to provide a filter rod that has a segment of stem-end filter 18 at each end, two flavor-containing filter segments 20 positioned between the two stem-end filter segments 18 and a tubular member 40 positioned between the two flavor-containing filter segments 20. Essentially, the stem double filter defines two smoking article filters 14 which are joined by a continuous plug pack 44 and a tubular member 40.
    [00042] Alternatively, a quadruple filter rod, as shown in Figure 3, can be formed by cutting the packaged filter assembly through each filter member 42 in order to provide a filter rod comprising essentially two rods double filter elements joined together.
    [00043] The formed filter rods are used to form two or more smoking articles. For example, as shown in Figure 4, a double filter rod can be used to form two filter cigarettes 10 by placing a tobacco rod 12 in axial alignment with each end of the filter rod. Then, a tipped casing 50 is packaged around the filter rod and a portion of each tobacco rod 12 adjacent to the filter rod. The pointed housing 50, the plug package 44 and the tubular member 40 are cut along a cutting line 52 to form two filter cigarettes. The resilience of the tubular member 40 prevents retraction or deformation of the mouth-end cavities of each cigarette 10 during the cutting process.
    [00044] As shown in Figures 5 and 6, each filter cigarette 10 comprises a packaged rod 12 of tobacco cutting charge which is attached at one end to an axially aligned filter 14. A tipped housing 16 formed from the housing with tip 50 circumscribes the filter 14 and a part of the packaged rod 12 to join the two parts of the cigarette 10 together.
    [00045] As shown in Figure 6, the filter 14 comprises the filter rod end segment 18, the flavor containing filter segment 20 and a hollow mouth end tube segment 22 formed from a part of a member tubular 40. Segments 18, 20 and 22 are circumscribed by a combined plug packaging 23 formed from the plug packaging web 44, the combined plug packaging 23 connecting the three segments to form the filter 14.
    [00046] The filter rod end segment 18 and the flavor containing filter segment 20 are formed by a suitable filtration material, such as cellulose acetate tow. In addition, the flavor-containing filter segment 20 comprises a suitable flavor enhancer which can be supplied in the form of one or more burstable capsules contained within the flavor-containing filter segment 20. In that case, one or more burstable capsules are broken by the consumer. when desired by squeezing the flavor-containing filter segment 20 between the consumer's fingers.
    [00047] The mouth end of the hollow tube segment 22 defines a mouth end cavity 24 in the filter 14 which extends between the downstream end of the flavor-containing filter segment 20 and the mouth end edge of the filter 14. The hollow mouth end tube segment 22 provides sufficient mechanical strength and resilience to resist deformation of the mouth end cavity 24, for example, during the rupture of one or more burst capsules when present in the flavor-containing filter segment 20.
    [00048] Figure 7 shows an exemplary method for forming a continuous tube 30 which can be cut to form a plurality of tubular members 40. In order to form the continuous tube 30, a plurality of continuous paper layers 32 are rolled up spiral around a cylindrical mandrel 34 in an overlapping and staggered arrangement. A suitable adhesive can be applied to one or more layers 32 using an adhesive bath 36 before wrapping the layer around the mandrel 34. The folds 32 are driven by a rubber belt 38, so that the continuous tube 30 rotates when around mandrel 34 until cut to desired lengths further downstream.
    权利要求:
    Claims (5)
    [0001]
    1. Method for producing smoking articles, the method being characterized by the fact that it comprises the steps of: providing a continuous set of the first filter members (42), second filter segments (20) and tubular members (40) , wherein a tubular member (40) is provided between each pair of first consecutive filter members (20), the tubular member (40) being formed of a plurality of overlapping paper layers (32), in which adjacent paper layers ( 32) are joined together by an intermediate adhesive layer, and in which a second filter segment (20) is provided between each first filter member and each tubular member (40), where each tubular member (40) has a length from 4 mm to 30 mm and a 50% compression force of 20 Newtons to 50 Newtons, each second filter segment (20) containing one or more breakable capsules, each breakable capsule comprising an outer coating and an inner core containing an additive ; pack the continuous set of the first filter members (42), second filter segments (20) and tubular members (40) with a plug packaging web (44) to form a packaged filter set, wherein the plug pack (44) has a base weight of less than 90 grams per square meter; cutting the packaged filter assembly in an intermediate position along each first filter member (42) to provide multiple filter rods, each filter rod comprising two first filter segments (18), a tubular member (40) positioned between the first filter segments (18) and a second filter segment (20) provided between each first filter segment (18) and the tubular member (40); providing a tobacco rod (12) in axial alignment and adjacent to each first filter segment (18) of a filter rod; pack the filter rod and a part of each tobacco rod (12) in a tipped wrapper (50); and cutting the tipped casing (50) and the filter rod in an intermediate position along the length of the tubular member (40) to form multiple smoking articles (10), wherein each smoking article (10) comprises a tobacco rod (12) connected to a filter (14), wherein each filter (14) comprises a first filter segment (18) downstream of the tobacco rod (12), a second filter segment (20) a downstream of the first filter segment (18), and a hollow tube segment positioned between the second filter segment (20) and the mouth end (22) of the filter (14), in which the hollow tube segment defines a cavity (24) at the mouth end (22) of the filter (14).
    [0002]
    2. Method according to claim 1, characterized in that it additionally comprises providing a segment plug package that circumscribes each second filter segment (20), wherein each segment plug package is impervious to the additive in the core inside of one or more breakable capsules.
    [0003]
    3. Method according to claim 1 or 2, characterized by the fact that the wall of each tubular member (40) has a thickness between 150 micrometers and 500 micrometers.
    [0004]
    Method according to any one of claims 1 to 3, characterized in that each tubular member (40) comprises a coating layer on an internal surface thereof.
    [0005]
    5. Method according to claim 1, characterized by the fact that the tipped casing (50) has a base weight of less than 70 gsm.
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    法律状态:
    2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-20| B06I| Publication of requirement cancelled [chapter 6.9 patent gazette]|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |
    2019-07-30| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-05-05| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-09-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-22| 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 19/07/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP12179441|2012-08-06|
    EP12179441.6|2012-08-06|
    PCT/EP2013/065330|WO2014023555A1|2012-08-06|2013-07-19|Method of forming smoking articles with mouth end cavities|
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