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WO2011148130A1 - Filtre à fumée de tabac - Google Patents

Filtre à fumée de tabac Download PDF

Info

Publication number
WO2011148130A1
WO2011148130A1 PCT/GB2011/000791 GB2011000791W WO2011148130A1 WO 2011148130 A1 WO2011148130 A1 WO 2011148130A1 GB 2011000791 W GB2011000791 W GB 2011000791W WO 2011148130 A1 WO2011148130 A1 WO 2011148130A1
Authority
WO
WIPO (PCT)
Prior art keywords
tobacco smoke
filter
core
longitudinally extending
filtering material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB2011/000791
Other languages
English (en)
Inventor
Nattapon Chimcham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essentra International Ltd
Original Assignee
Filtrona International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filtrona International Ltd filed Critical Filtrona International Ltd
Priority to CN201190000526.XU priority Critical patent/CN203662002U/zh
Publication of WO2011148130A1 publication Critical patent/WO2011148130A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0229—Filter rod forming processes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure

Definitions

  • This invention relates to tobacco smoke filters having a tobacco smoke filtering core of non- circular cross section, an outer layer of air-permeable material encasing the core and, optionally, an outer wrapper engaged around the outer layer.
  • Concentric core cigarette filters which comprise an inner cylindrical core of one filtering material surrounded by outer layer (annulus or annular layer) of another filtering material are known.
  • the use of two such different filtering materials for the core and outer annular layer can give rise to an unsightly end appearance in the final filter cigarette and it is thus conventional for the concentric core filter to be employed in a dual or other multiple component filter, in addition to a plain buccal end plug of acceptable uniform end appearance.
  • the present invention relates to "concentric" core filters in which the inner core has a defined, non-circular, cross section.
  • a method of producing a tobacco smoke filter or filter element comprising: forming a longitudinally extending outer layer (e.g. a substantially annular outer layer) of tobacco smoke filtering material around a continuously advancing longitudinally extending (inner) core of tobacco smoke filtering material of non- circular cross section.
  • a longitudinally extending outer layer e.g. a substantially annular outer layer
  • the longitudinally extending outer layer may be formed around the continuously advancing (inner) core of non-circular cross section by continuously advancing the longitudinally extending (inner) core through a hollow tube; continually advancing a flow of tobacco smoke filtering material along (e.g. along and around) the outer surface of the hollow tube; and condensing (e.g. drawing and gathering e.g. by means of a garniture) the continually advancing tobacco smoke filtering material (from the flow) around the continuously advancing (inner) core as the core exits the hollow tube.
  • the condensed filtering material forms the outer layer (of tobacco smoke filtering material).
  • the filtering material which forms the outer layer is a cellulose acetate tow, optionally including a plasticiser (e.g.
  • the method may include a further step of heat treating the advancing outer layer of tobacco smoke filtering material as and/or or shortly after it is formed (e.g. condensed) around the continuously advancing longitudinally extending (inner) core of tobacco smoke filtering material of non-circular cross section, optionally with a subsequent cooling step.
  • the heat treatment (and optional cooling) may activate the plasticiser to form the filtering material into a coherent, bonded, smoke- permeable structure around the shaped core.
  • the continuously advancing longitudinally extending (inner) core of tobacco smoke filtering material of non-circular cross section may be formed immediately or substantially immediately prior to forming the longitudinally extending outer layer of tobacco smoke filtering material around the core, for example as part of the same continuous in-line process.
  • the continuously advancing longitudinally extending (inner) core of tobacco smoke filtering material of non-circular cross section may be formed by continuously advancing (e.g. continuously drawing and/or gathering) a flow of tobacco smoke filtering material through a shaped die of non-circular cross section.
  • the filtering material which forms the longitudinally extending (inner) core is a cellulose acetate tow, optionally including a plasticiser (e.g. glyceryl triacetate).
  • the method may include a further step of heat treating the advancing longitudinally extending (inner) core as and/or or shortly after it is formed [e.g. as and/or or shortly after it is formed by continuously advancing (e.g. continuously drawing and/or gathering) a flow of tobacco smoke filtering material through a shaped die of non- circular cross section], optionally with a subsequent cooling step.
  • the heat treatment (and optional cooling) may activate the plasticiser to form the filtering material into a coherent, bonded, smoke-permeable shaped longitudinally extending (inner) core.
  • the defined method of manufacture overcomes the prob)ems of forming a shaped core and maintaining a well-defined shape for the core because the pre-formed core is drawn and combined with the outer material in a second step (e.g. in a second garniture).
  • the method may provide filters and filter elements having distinctive and attractive end appearance, thereby eliminating the usual need for a concentric core filter to be combined with a plain buccal end plug, and reducing the cost and number of steps of the overall filter manufacturing operation.
  • the distinctive end appearance provided to the finished filter cigarette may be advantageous for anti-counterfeiting purposes.
  • a tobacco smoke filter or filter element (e.g. formed by the method according to the invention) comprising a longitudinally extending inner core of tobacco smoke filtering material; and a longitudinally extending outer layer of tobacco smoke filtering material engaged around the longitudinally extending inner core; wherein the longitudinally extending inner core is of non-circular cross section.
  • the longitudinally extending outer layer of tobacco smoke filtering material is engaged around (e.g. surrounds) the longitudinally extending inner core such that the outer face of the inner core is enclosed by the longitudinally extending outer layer of tobacco smoke filtering material.
  • the filter or filter element is generally circular or oval in cross section.
  • the longitudinally extending inner core may be of star shaped, triloba), pentagonal, cog-shaped, heart-shaped or logo shaped cross section, or other non-circular cross section.
  • the longitudinally extending core of tobacco smoke filtering material of non- circular cross section does not have a helical cross section.
  • the inner core and/or outer core may comprise a cellulose acetate tow, optionally including a plasticiser.
  • the inner core and/or outer core may include a pigment.
  • the inner core is preferably of a contrasting colour to the outer layer.
  • the tobacco smoke filter or filter element may include an extending wrapper arranged around the tobacco smoke filter or filter element.
  • the outer layer preferably adheres to the core material to resist separation.
  • the choice of the inner core and outer layer (surrounding substantially annular body) and the ventilation (if any) employed in the final cigarette filter enables the smoke stream to be predominantly channelled through one component (inner core, outer layer) of the filter, for example to take advantage of the filtration characteristics provided by that particular filter component. This can be achieved through selection of appropriate levels of pressure drop and retention level provided by the inner core and outer layer, together with the ventilation level of the finished cigarette, to direct the smoke flow path through the inner core or outer layer.
  • the present invention can thereby provide enhanced filtration characteristics combined with visual differentiation characteristics provided by the end appearance.
  • the filter when used in a ventilated cigarette, can give a significant reduction of carbon monoxide and vapour phase compounds found in smoke without reducing tar levels by the same extent as a ventilated cigarette employing a conventional filter. This enables the cigarette taste and acceptable pressure drops to be maintained, especially in ultra low-tar cigarettes, whilst reducing the levels of carbon monoxide and other volatile smoke compounds.
  • the (inner) core and the outer layer are of gathered and bonded cellulose acetate tow.
  • Other fibrous or filamentary material may also be employed in either the core or the outer layer.
  • the (inner) core will (include pigment and) be of a different colour to the outer layer to accentuate the end appearance of the filter.
  • the shaped core may be red, blue, green or black in colour and the outer layer may be white.
  • a coloured (pigmented) material is used in the inner core and the filter or filter ventilation components (outer layer, wrapper) are selected so as to channel smoke predominantly along the core, a reduced impression of staining is advantageously obtained after the cigarette has been smoked.
  • a white core and a white outer layer are both used, it is possible for the shape of the core to become more apparent during smoking due to enhanced staining of the core resulting from smoke being channelled along the core.
  • Such a feature may serve as an anti-counterfeit feature and/or to enhance brand identity.
  • a method of producing a tobacco smoke filter or filter element comprising a step of aligning side-by-side two or more longitudinally extending portions of tobacco smoke filtering material each having a uniform cross section to form a longitudinally extending cylindrical core of tobacco smoke filtering material having a uniform solid cross section.
  • solid cross section means that the cylindrical core has a circular (or oval) cross section (formed by the combination of longitudinally extending portions of tobacco smoke filtering material) which does not have (longitudinally extending) gaps or spaces between the portions.
  • the cylindrical core of tobacco smoke filtering material having a uniform solid cross section presents a fully circular or oval (gap free) face at its end.
  • the "solid cross section" is air permeable.
  • a tobacco smoke filter or filter element (e.g. formed by the method according to the invention) including a plurality of longitudinally extending portions of tobacco smoke filtering material each having a uniform cross section; the plurality of longitudinally extending portions being aligned side- by-side to form a longitudinally extending cylindrical core of tobacco smoke filtering material having a uniform solid cross section.
  • the tobacco smoke filter or filter element may include two longitudinally extending portions of tobacco smoke filtering material each having a uniform cross section; the longitudinally extending portions being aligned side-by-side to form a longitudinally extending cylindrical core of tobacco smoke filtering material having a uniform solid cross section.
  • the boundary between adjacent longitudinally extending portions which are aligned side-by-side may be of elongated S shape in cross section.
  • Two or more of the longitudinally extending portions of filtering material may be of contrasting colours.
  • the tobacco smoke filter or filter element may further comprise an extending wrapper arranged around the tobacco smoke filtering or filter element.
  • the two (or more) filter materials are aligned in a side-by-side alignment rather than in a coaxial arrangement.
  • These two side-by-side components may be of different colours and the boundary between the tow components can follow a defined shape, e.g. an elongated 'S' , so the end of the filter or filter element presents a circular face looking like a stylised Ying Yang symbol (e.g. as shown in Fig 3).
  • a filter or filter element according to any aspect of the invention is preferably wrapped in an outer plug wrap.
  • This plug wrap may be porous or non-porous.
  • the filters according to the invention are preferably formed in a continuous length and then cut into finite lengths. These may be a multiple (e.g. quadruple or sextuple) of the length of the eventual filter tips.
  • the filter tips may be of circumference between 14 and 28 mm and of length between 15 and 40 mm.
  • the tobacco smoke filter or filter element according to the invention may be of circumference 14 to 28 mm, for example 16 to 26 mm, for example 16 to 17 mm or 24 to 25 mm.
  • a tobacco smoke filter of the invention may be of length 10 to 40 mm, e.g. 15 to 35 mm, e.g. 20 to 30 mm.
  • a tobacco smoke filter element of the invention may be of length 5 to 30mm, e.g. 6 to 20mm, e.g. 8 to 15 mm, e.g. 10 to 12 mm.
  • Filters and filter elements according to the invention may be used in machine made cigarettes (e.g. those mass produced and packaged). Filters and filter elements according to the invention may also be used as (or in) a filter tip for use with a individually rolled cigarette (e.g a hand rolled cigarette) or a Roll Your Own or Make-your-own product.
  • a filter tip for use with a individually rolled cigarette (e.g a hand rolled cigarette) or a Roll Your Own or Make-your-own product.
  • a filter element according to the invention may also be used as the mouth-end segment of a multi-segment filter, e.g. a dual, triple, other multiple filter.
  • a multi-segment filter e.g. a dual, triple, other multiple filter.
  • filters are well known in the art.
  • the invention includes any filter cigarette made using a filter according to the invention.
  • FIGURE 1 shows an end of an example of a filter according to the invention
  • FIGURE 2 shows an end of a second example of a filter according to the invention
  • FIGURE 3 shows an end of a third example of a filter according to the invention.
  • FIGURE 4 is a schematic side elevation view of an apparatus for forming filters according to the invention by the method of the invention.
  • Filters and filter elements of the invention may be conveniently made by using crimped continuous filaments of cellulose acetate and bonding them to each other. Other fibrous or filamentary materials may also be employed.
  • the core and outer layer materials each preferably comprise continuously crimped filamentary tows of cellulose acetate and these two filamentary tow streams are treated separately prior to being combined within the second garniture of a filter making machine.
  • a first stream of cellulose acetate tow (11) (which will form the inner core) is continuously drawn from one or more bales (not shown) and treated by longitudinally stressing each filamentary tow to separate the filaments, forming the filaments into a thinly spread layer, and spraying the tow with glycerol triacetate plasticiser.
  • the stream of tow is drawn over a guide (12) into two sets of rollers (13, 13a and 14, 14a). Rollers (14, 14a) rotate faster than rollers (13, 13a) causing the tow to be stretched and opened to form a web of first filter material of width of approximately 250 mm.
  • the web of tow then passes into a spray booth (15) where it is sprayed with glycerol triacetate before exiting the spray booth via a set of delivery rollers (16, 16a).
  • a spray booth (15) where it is sprayed with glycerol triacetate before exiting the spray booth via a set of delivery rollers (16, 16a).
  • the continuously advancing treated tow (11) is gathered and drawn, by means of a garniture (13) and an endless tape, through a shaped die (14).
  • steam is passed in a radial direction directly into contact with the tow filaments, so that they are rapidly heated and, by the solvent action of the glycerol triacetate, caused to adhere to each other to form an inner core (11a) of tobacco smoke filtering material of the desired cross section (e.g. a star as shown in Fig 1).
  • the die (14), and resulting inner core (11a) may be of any desired shape, for example star, triangle, pentagon or heart-shaped
  • a second longitudinally advancing stream of cellulose acetate tow (21) is used to form the outer layer.
  • the tow is continuously drawn from one or more bales and treated by longitudinally stressing each filamentary tow to separate the filaments, forming the filaments into a thinly spread layer, and spraying the tow with glycerol triacetate plasticiser, by methods well known in the art (not shown in Fig 4).
  • the second stream is applied around the inner core, as follows.
  • the continually advancing inner core of tobacco smoke filtering material of the desired cross section (11a) is advanced into and through a hollow tube (15) within an enclosure (16).
  • the longitudinally advancing second stream of filamentary tow (21) is passed, by means of a further garniture and endless tape, around the hollow tube, such that it is advancing in the same direction as the inner core (in the direction of arrow 23).
  • the second stream of tow (21) condenses around the shaped inner core as the core advances and exits the hollow tube, thereby forming a substantially annular outer layer of filtering material (21a) around the inner core (1 1 a).
  • the hollow tube (15) is located in the enclosure such that the inner core becomes centrally located within the finished filter.
  • the process provides a filter rod (31 ) comprising a longitudinally extending inner core (1 1 a) of tobacco smoke filtering material; and a longitudinally extending outer layer (21 a) of tobacco smoke filtering material engaged around the longitudinally extending inner core; wherein the longitudinally extending inner core is of non-circular cross section.
  • the filter rod may be cut into single or multiple filter or filter element lengths for subsequent use (ie. as filters or filter elements, or for combination with other filters or filter elements), by methods known in the art.
  • the filamentary material for the longitudinally extending core component is passed into a die and garniture arrangement to form the desired (non-circular) shape and the so-formed core is subsequently surrounded and encompassed by the filamentary material of the outer layer as it passes through a further garniture to provide a continuous filter rod.
  • the method of manufacture described above overcomes the problems of forming a shaped core and maintaining a well-defined shape for the core because the core is drawn and combined with the annular material in the second garniture after the core is formed.
  • FIG. 1 shows one end of a filter (or element or rod) according to the invention, made by the process above.
  • the filter comprises an inner core of plasticised cellulose acetate filamentary tow having a cross section in the shape of a five-pointed star (1 ) intimately surrounded by an outer layer of plasticised white-coloured cellulose acetate filamentary tow (2) encased in a plugwrap paper (3).
  • the cellulose acetate tow which forms the core includes a green pigment which contrasts with the white of the outer layer, and provides a distinctive end appearance. It will be appreciated that a star shaped die is used to form the core.
  • FIG. 2 shows one end of another filter (or element or rod) according to the invention, made by the process above.
  • the filter comprises a core of red-coloured (pigmented) plasticised cellulose acetate filamentary tow in the shape of heart (1 a) intimately surrounded by an annulus of white-coloured plasticised cellulose acetate filamentary tow (2b) encased in a plugwrap paper (3).
  • a heart shaped die is used to form the core, and the contrast between the red heart-shaped core and white surrounding layer provides a distinctive end appearance.
  • a filter or filter element by aligning side-by-side (rather than in a coaxial arrangement) two or more longitudinally extending portions of tobacco smoke filtering material each having a uniform cross section and drawing and gathering them through a garniture to form a longitudinally extending cylindrical core of tobacco smoke filtering material having a uniform solid cross section.
  • Thee two side-by-side portions may be of different colours and the boundary between the tow components can follow a defined shape, e.g an elongated 'S' or stylized Ying Yang symbol.
  • FIG 3 shows one end of another filter (or element or rod) according to the invention, made by the adapted process described above.
  • Two different coloured plasticised filamentary tows of cellulose acetate are arranged side-by-side.
  • the filter comprises a green-coloured filter material (1 b) and a black-coloured filter material (2b) that form two distinct regions, with the boundary between them following an 'S' shaped curve.
  • the filter is encased in a plugwrap paper (3b).
  • the contrasting green and black layers provide a distinctive end appearance.

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

Abstract

La présente invention concerne un filtre ou un élément de filtre à fumée de tabac qui comprend : une couche externe, à extension longitudinale, de matériau filtrant la fumée de tabac disposée autour d'un noyau continu, à extension longitudinale, de matériau filtrant la fumée de tabac doté d'une section transversale non circulaire.
PCT/GB2011/000791 2010-05-27 2011-05-24 Filtre à fumée de tabac Ceased WO2011148130A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201190000526.XU CN203662002U (zh) 2010-05-27 2011-05-24 烟草烟雾过滤器、烟草烟雾过滤器元件和过滤器香烟

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1008922.5A GB201008922D0 (en) 2010-05-27 2010-05-27 Tobacco smoke lilter
GB1008922.5 2010-05-27

Publications (1)

Publication Number Publication Date
WO2011148130A1 true WO2011148130A1 (fr) 2011-12-01

Family

ID=42371127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2011/000791 Ceased WO2011148130A1 (fr) 2010-05-27 2011-05-24 Filtre à fumée de tabac

Country Status (4)

Country Link
CN (1) CN203662002U (fr)
GB (1) GB201008922D0 (fr)
TW (1) TWI651054B (fr)
WO (1) WO2011148130A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2492897A (en) * 2011-07-13 2013-01-16 Sichuan sanlian cigarette material co ltd Cigarette filter with smiling face
WO2013117620A1 (fr) * 2012-02-08 2013-08-15 Filtrona Filter Products Development Co. Pte. Ltd Filtre à fumée de tabac
CN103487554A (zh) * 2013-09-24 2014-01-01 中国烟草总公司贵州省公司 一种卷烟主流烟气中焦油量及一氧化碳量测定方法
WO2013179009A3 (fr) * 2012-05-30 2014-01-30 British American Tobacco (Investments) Limited Filtre pour un article à fumer
WO2014020055A1 (fr) * 2012-08-01 2014-02-06 Essentra Filter Products Development Co. Pte. Ltd Filtre pour fumée de tabac
ITBO20120536A1 (it) * 2012-10-01 2014-04-02 Montrade S R L Elemento filtrante additivato per articoli da fumo e metodo per la sua realizzazione
WO2014136224A1 (fr) 2013-03-06 2014-09-12 日本たばこ産業株式会社 Procédé de production de cigarette, cigarette et double cigarette
WO2014136225A1 (fr) 2013-03-06 2014-09-12 日本たばこ産業株式会社 Procédé de production de cigarette, cigarette et double cigarette
WO2014198815A1 (fr) * 2013-06-13 2014-12-18 Essentra Filter Products Development Co. Pte. Ltd Filtre pour la fumée de tabac
WO2015194007A1 (fr) * 2014-06-19 2015-12-23 株式会社ダイセル Ruban de câble de filtre de cigarette
US9392819B2 (en) 2012-03-05 2016-07-19 Montrade S.R.L. Method and machine for producing paperless filter rods for smoking articles
ITUB20151932A1 (it) * 2015-07-06 2017-01-06 Gd Spa Metodo e macchina per la realizzazione di filtri
WO2021144887A1 (fr) * 2020-01-15 2021-07-22 日本たばこ産業株式会社 Filtre, article d'inhalation d'arôme, ensemble d'articles d'inhalation d'arôme, procédé de production de filtre, procédé de production d'article d'inhalation d'arôme et procédé de production d'ensemble d'articles d'inhalation d'arôme
CN113598409A (zh) * 2021-08-31 2021-11-05 南通烟滤嘴有限责任公司 一种内芯悬空滤嘴及烟支
US11291242B2 (en) 2019-08-28 2022-04-05 Aiger Group Ag Apparatus and method for forming a smoke filter
US11632984B2 (en) 2016-07-07 2023-04-25 Philip Morris Products S.A. Smoking article mouthpiece for receiving an insert unit

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CN104188106A (zh) * 2014-08-28 2014-12-10 云南中烟工业有限责任公司 一种高截留效率的卷烟滤嘴及应用
CN104366690A (zh) * 2014-11-12 2015-02-25 广西中烟工业有限责任公司 具有几何形状彩色丝束的滤棒以及其制备方法和应用
CN106263021B (zh) * 2016-11-01 2022-07-29 湖北中烟工业有限责任公司 一种w型香烟滤棒成型装置
CN109588768B (zh) * 2018-12-14 2021-04-02 湖南中烟工业有限责任公司 一种降温嘴棒及卷烟
IT202000003952A1 (it) * 2020-02-26 2021-08-26 Gd Spa Macchina e metodo per la realizzazione di un tubolare continuo da materiale in nastro
CN115428986A (zh) * 2021-06-02 2022-12-06 江苏大亚滤嘴材料有限公司 烟用降温棒中棒滤棒及其制备工艺、设备

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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2492897A (en) * 2011-07-13 2013-01-16 Sichuan sanlian cigarette material co ltd Cigarette filter with smiling face
GB2492897B (en) * 2011-07-13 2016-03-09 Sichuan sanlian cigarette material co ltd Production equipment of smile-face shape cigarette filter tip
CN104135876A (zh) * 2012-02-08 2014-11-05 益升华过滤产品开发私人有限公司 烟草烟雾过滤器
WO2013117620A1 (fr) * 2012-02-08 2013-08-15 Filtrona Filter Products Development Co. Pte. Ltd Filtre à fumée de tabac
JP2015506183A (ja) * 2012-02-08 2015-03-02 エッセントラ フィルター プロダクツ ディベロップメント カンパニープライベート リミティド タバコ煙フィルタ
RU2633855C2 (ru) * 2012-02-08 2017-10-18 Эссентра Филтер Продактс Девелопмент Ко. Пти. Лтд Фильтр для табачного дыма
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US9392819B2 (en) 2012-03-05 2016-07-19 Montrade S.R.L. Method and machine for producing paperless filter rods for smoking articles
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TW201200043A (en) 2012-01-01

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