EP3804539A1 - Smoking article filter - Google Patents

Smoking article filter Download PDF

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Publication number
EP3804539A1
EP3804539A1 EP20212192.7A EP20212192A EP3804539A1 EP 3804539 A1 EP3804539 A1 EP 3804539A1 EP 20212192 A EP20212192 A EP 20212192A EP 3804539 A1 EP3804539 A1 EP 3804539A1
Authority
EP
European Patent Office
Prior art keywords
mouthpiece
filter
filtering material
cannabis sativa
channel
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.)
Pending
Application number
EP20212192.7A
Other languages
German (de)
English (en)
French (fr)
Inventor
Brenton D DILLIE
Ann TREADAWAY
Elizabeth GERRINGER
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 Filter Products Development Co Pte Ltd
Original Assignee
Essentra Filter Products Development Co Pte 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=63798963&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3804539(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US15/722,086 external-priority patent/US20190098928A1/en
Priority claimed from GB1718333.6A external-priority patent/GB2568096A/en
Application filed by Essentra Filter Products Development Co Pte Ltd filed Critical Essentra Filter Products Development Co Pte Ltd
Publication of EP3804539A1 publication Critical patent/EP3804539A1/en
Pending legal-status Critical Current

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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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives

Definitions

  • the present invention relates to filters for smoking articles.
  • Marijuana smoking articles are typically hand-rolled by the smoker. Marijuana smoking articles do not typically include a filter comprising a cylindrical rod of acetate fibres. This is because the cellulose acetate is thought to excessively filter the active ingredients in marijuana smoke, for example CBD and/or THC.
  • Many marijuana smokers prefer to smoke marijuana smoking articles using a rudimentary smoker-prepared mouthpiece, commonly known as a "roach".
  • a roach is generally prepared by rolling a strip of cardboard at an angle to edge of the strip to form a conical mouthpiece.
  • Roaches do not significantly filter the marijuana smoke, and simply serve to prevent the heat from the smoke and/or burning particles in the smoke, e.g. burning Marijuana particles from burning the smoker's lips whilst inhaling.
  • roaches Disadvantages of roaches include the significant amount of time for the smoker to prepare and an undesirable, untrustworthy and unreproducible crude-looking end appearance. Further, a roach does not provide the same firmness and/or experience as a manufactured cigarette filter.
  • the longitudinally extending rod of filtering material may be of uniform cross-section along its full length (for example, being of uniform annular cross-section along its full length with the inner surface of the annular cross-section defining the channel).
  • the channel may be of uniform cross-section along its full length.
  • the channel may be of circular cross section, or other cross section (e.g. star-shaped, crescent shaped, flower-shaped, cross-shaped, X-shaped etc.)
  • the longitudinally extending rod of filtering material is of uniform outer dimension along its full length but the channel (which may or may not be of uniform cross-section along its full length) is helical about the longitudinally extending axis of the filter (e.g. the channel is in the form of a spiral about the longitudinal axis of the filter).
  • a helical channel increases the distance the marijuana smoke has to travel to reach the smoker's lips, thus providing a cool yet minimally filtered smoke. This advantage is not possible using existing roach technology.
  • a mouthpiece or filter according to the present invention allows for smoke constituents to be focused towards the user and for cooling of the smoke as it travels to the user.
  • the mouthpiece or filter also may prevent embers or loose particulate matter from reaching the user's mouth and provides a grip point for the users fingers at the end of the product.
  • the mouthpiece or filter of the present invention may provide a unique visual experience for the user, for example by having a certain colour (e.g. red, yellow or green) or being capable of colour change during use of the product.
  • the mouthpiece or filter may provide a similar smoking experience (e.g. in terms of mouth-feel) to a cigarette due to the uniformity and firmness of the mouthpiece, and/or may make it easier to make the 'joint'.
  • the channel may be of circular, semi-circular (D-shaped), square, triangular, hollow star shaped, trilobal, pentagonal or cog-shaped cross-section, or of a cross-section in the shape of a logo or other pattern.
  • Mouthpieces or filters having a non-cylindrical channel, particularly those channel mouthpieces or filters having a complex and/or unsymmetrical cross-sectional profile may be of particular use in combatting anti-counterfeiting.
  • Channel mouthpieces or filters wherein the channel is not of uniform cross-section along its full length may also be of use in combatting anti-counterfeiting.
  • the channel which extends the full length of the mouthpiece or filter may be of uniform cross-section along the full length of the mouthpiece or filter.
  • the rod of filtering material is preferably of uniform outer dimensions along its full length (e.g. a cylinder of uniform dimensions along its full length).
  • Channel mouthpieces or filters may be manufactured by pulling a continuous bundle of cellulose acetate filamentary tow, optionally with triacetin already applied thereto, through a fix die having an external diameter equal to that of the desired external diameter of the mouthpiece or filter to be produced, the fix die including a protruding inner rod (or mandrel) extending through the die having a cross-sectional profile equal to that of the desired cross-section of the channel .
  • the filamentary tow When the filamentary tow is pulled through the die, it passes around the inner rod such that on exiting the die, a mouthpiece or filter is formed having a channel having a cross-sectional profile equivalent to that of the inner rod. Heated steam may be applied to the filamentary tow whilst the filamentary tow is in the die. The heated steam may be applied via a duct in the die. The heated steam may be for curing plasticizer applied to the filamentary tow (if present), allowing the mouthpiece or filter to maintain the shape of the die after exiting the die.
  • a channel extending along (e.g. through) the full length of the mouthpiece or filter allows a significant quantity of smoke (e.g. marijuana smoke, e.g. hemp smoke, e.g. oregano smoke) to pass directly to the smoker's mouth without being overly filtered.
  • smoke e.g. marijuana smoke, e.g. hemp smoke, e.g. oregano smoke
  • the mouthpiece or filter also provides a refined end appearance and prevents the smoker's fingers and/or mouth from being burnt.
  • the mouthpiece or filter of the present invention may comprise a single channel.
  • the mouthpiece or filter of the present invention may comprise multiple channels.
  • the mouthpiece or filter may comprise from 1 to 20 channels, for example from 1 to 10 channels, for example from 2 to 10 channels, for example from 1 to 5 channels, for example from 2 to 5 channels, for example 3 channels, for example 1 channel.
  • the mouthpiece or filter of the present invention comprises multiple channels, these may be arranged in a number of different ways, for example in a triangular pattern, for example in a circular pattern, for example in a square pattern.
  • the use of multiple channels may further cool the smoke and prevent embers from reaching the user's mouth.
  • the longitudinally extending rod of filtering material when the mouthpiece or filter comprises a single longitudinally extending channel, the longitudinally extending rod of filtering material may be of uniform annular cross-section along its full length with the inner surface of the annular cross-section defining the channel. In another embodiment, when the mouthpiece or filter comprises 3 longitudinally extending channels, the longitudinally extending rod of filtering material may be of uniform cross-section along its full length with the channels arranged in a triangular pattern (see e.g. Figure 4 ).
  • the filtering material may be, for example, any of those materials (usually filamentary, fibrous, web or extruded) conventionally employed for tobacco smoke filter manufacture.
  • the filtering material may be natural or synthetic filamentary tow, e.g. of cotton or plastics such as polyethylene or polypropylene, or cellulose acetate filamentary tow.
  • the filtering material may be a thermoplastic or otherwise spinnable polymer, for example polypropylene, polyethylene terephthalate or polyactide. It may be, for example, natural or synthetic staple fibres, cotton wool, web material such as paper (usually creped) and synthetic non-wovens, and extruded material (e.g. starch, synthetic foams).
  • the filtering material comprises cellulose acetate filamentary tow.
  • the filtering material may optionally include a binder material.
  • the filtering material may optionally include a water soluble binder material.
  • water soluble materials include water soluble polymer materials such as polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl ether, starches, polyethylene glycols and polypropylene glycols; blends of water soluble binders with plasticisers such as triacetin, triethyleneglycol diacetate (TEGDA), or polyethylene glycol (PEG); and hot melt water soluble binders in particulate form.
  • TOGDA triethyleneglycol diacetate
  • PEG polyethylene glycol
  • the filtering material may include an additive.
  • the additive may be a particulate additive.
  • the particulate additive may be any particulate additive suitable for use in a smoke filter - e.g. activated carbon, zeolite, ion exchange resin (e.g. a weakly basic anion exchange resin), sepiolite, silica gel, alumina, molecular sieves, carbonaceous polymer resins and diatomaceous earths.
  • the particulate additive may be a mixture of two, or more, materials.
  • the additive may be a pigment, for example a pearlescent pigment or a thermo-chromatic pigment,
  • the smoke modifying agent (flavourant) may be liquefied prior to application to the filtering material, for example by heating above the melting point, for example by mixing with a liquid carrier.
  • the smoke modifying agent (flavourant) may be applied to the filtering material prior to the filtering material entering the die, for example immediately before entering the die.
  • the smoke modifying agent (flavourant) may be mixed with and applied with a plasticiser, for example by spraying the mixture of smoke modifying agent (flavourant) and plasticiser onto the filtering material.
  • a preferred smoke modifying agent (flavourant) is menthol.
  • the additive may be sepiolite granules to which menthol flavourant has been applied.
  • the filtering material may include fully enclosed (e.g. embedded) pocket(s) of additive embedded therein.
  • the additive may be a particulate additive such as activated carbon (see above), which is for example enclosed within the filtering material as a discrete pocket or pod of particles of particulate additive which is substantially separate from, and fully enclosed within, the filtering material.
  • the fully enclosed (e.g. embedded) pocket(s) of additive may be a frangible capsule or capsules, or one or a plurality of frangible microcapsules.
  • the capsule(s) or microcapsule(s) may contain a variety of media - e.g. a smoke modifying agent such as a flavourant (such as those flavourants disclosed above) and/or a liquid, solid or other material e.g. to aid smoke filtration.
  • a smoke modifying agent such as a flavourant (such as those flavourants disclosed above)
  • a liquid, solid or other material e.g. to aid smoke filtration.
  • the channel is semi-cylindrical in shape and the pocket(s) of additive (e.g. flavour capsule[s]) is/are provided in the rod of filtering material adjacent the semi-cylindrical channel.
  • the channel is semi-cylindrical in shape and the thread and/or extruded element is provided in the rod of filtering material adjacent the semi-cylindrical channel.
  • the outer circumference of the mouthpiece or filter may be between 10.0 mm and 50 mm, for example between 14.0 mm and 35 mm, for example between 16 and 30 mm, for example between 18.0 mm and 28 mm, for example between 22 mm and 26 mm, for example about 25 mm.
  • the mouthpiece or filter may have a circumference from 15 mm to 22 mm.
  • the channel or channels present in the mouthpiece or filter of the present invention may for example have a diameter from 0.5 mm to 10 mm, for example from 1 mm to 8 mm, for example from 1 mm to 4 mm, for example from 4 mm to 8 mm, for example from 3 mm to 6 mm.
  • the length of the mouthpiece or filter may be between 4.0 mm and 50 mm, for example between 5.0 mm and 40 mm, for example between 10 and 35 mm, for example between 18.0 mm and 30 mm, for example between 22 mm and 28 mm, for example about 25 mm.
  • the mouthpiece or filter may have a length from 15 mm to 30 mm.
  • the smoke filtering material may be over wrapped with a wrapper or plugwrap, for example a wrapper of paper, for example a wrapper of an air-permeable paper.
  • Particulate additives such as those discussed above may be applied to the wrapper or plugwrap surrounding the filter material, for example as described in GB 2261152 .
  • the wrapper and/or plug wrap may alternatively be derived from a plant in the Cannabis genus, for example Cannabis sativa, for example Cannabis sativa sativa, Cannabis sativa indica or Cannabis sativa ruderalis or from a mixture thereof.
  • Such wrappers are well known in the art and described in WO2017068437 , for example.
  • Any mouthpiece or filter or mouthpiece or filter smoking article according to the invention may be unventilated, or may be ventilated by methods well known in the art, e.g. by use of a pre-perforated or air-permeable wrapper(s) (plugwrap), and/or laser perforation of wrapper(s) (plugwrap) and tipping overwrap.
  • a ventilating full tipping overwrap may likewise be inherently air-permeable or provided with ventilation holes, and in ventilated products where both filter plugwrap and tipping overwrap are present ventilation through the overwrap will usually be in register with that through the plugwrap. Ventilation holes through a filter plugwrap, or through a tipping overwrap, or through both simultaneously, may be made by laser perforation during mouthpiece or filter or mouthpiece or filter smoking article production.
  • a multiple rod comprising a plurality of mouthpieces or filters as described above and/or herein integrally joined end-to-end in a mirror image relationship.
  • the mouthpiece or filter of the invention for use in a smoking article comprising one or more smokable material(s) other than tobacco.
  • the smokable material other than tobacco may be prepared from a plant in the Cannabis genus, for example Cannabis sativa, for example Cannabis sativa sativa, Cannabis sativa indica or Cannabis sativa ruderalis or a mixture thereof. Additionally or alternatively the smokable material other than tobacco may comprise oregano and/or hemp.
  • the use of the mouthpiece or filter of the invention for filtering the smoke of a smoking article comprising one or more smokable material(s) other than tobacco.
  • the smokable material other than tobacco may be prepared from a plant in the Cannabis genus, for example Cannabis sativa, for example Cannabis sativa sativa, Cannabis sativa indica or Cannabis sativa ruderalis or a mixture thereof. Additionally or alternatively the smokable material other than tobacco may comprise oregano and/or hemp.
  • FIGURE 1 schematically illustrates a mouthpiece or filter according to one embodiment of the invention
  • FIGURES 2 and 3 schematically illustrate a mouthpiece or filter according to another embodiment of the invention
  • Figure 4 illustrates a mouthpiece or filter according to another embodiment of the present invention.
  • Figure 1 shows a smoking article filter 1 of 27 mm length and 24.5 mm circumference comprising a longitudinally extending annular rod 2 of filtering material.
  • the filtering material comprises cellulose acetate filamentary tow.
  • the annular rod 2 of filtering material defines a longitudinally extending cylindrical channel 3 which extends along the full length of the filter.
  • Smoking article filter 1 may be manufactured by pulling a continuous bundle of cellulose acetate filamentary tow, optionally with triacetin already applied thereto, through a fix die having an external diameter equal to that of the desired external diameter of the filter, the fix die including a protruding inner rod (or mandrel) extending through the die having a cross-sectional profile equal to that of the desired cross-section of the channel 3.
  • the filamentary tow is pulled through the die, it passes around the inner rod such that on exiting the die, a filter 1 including an annular rod 2 of filtering material is formed, the filter 1 having a channel 3 having a cross-sectional profile equivalent to that of the inner rod.
  • Heated steam may be applied to the filamentary tow whilst the filamentary tow is in the die.
  • the heated steam may be applied via a duct in the die.
  • the heated steam may be for curing plasticizer applied to the filamentary tow (if present), allowing the filter 1 to maintain the shape of the die after exiting the die.
  • FIG 2 shows a smoking article filter 101, of 27 mm length and 24.5 mm circumference comprising a longitudinally extending annular rod 102 of filtering material.
  • the filtering material comprises cellulose acetate filamentary tow.
  • the annular rod 102 of smoking filtering material includes a longitudinally extending channel 103 of semi-circular (D-shaped) cross-section which extends along the full length of the filter.
  • a flavour capsule 104 is provided within the filtering material which forms the annular rod 102, approximately half way along the full length of the rod.
  • Smoking article filter 101 may be manufactured using the same method as used to manufacture smoking article filter 1. The insertion of flavour capsule 104 into the annular rod 102 of filtering material may be carried out using methods well known in the art.
  • Figure 3 shows a cross-section of the smoking article filter 101 of Figure 2 (denoted by the plane 105-105 shown in Figure 2 ), showing the D-shaped cross section of channel 103 and the capsule 104 within the filtering material.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
EP20212192.7A 2017-10-02 2018-10-01 Smoking article filter Pending EP3804539A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US15/722,086 US20190098928A1 (en) 2017-10-02 2017-10-02 Smoking article filter
GB1718333.6A GB2568096A (en) 2017-11-06 2017-11-06 Smoking article filter
EP18783398.3A EP3651591B1 (en) 2017-10-02 2018-10-01 Smoking article filter
PCT/EP2018/076578 WO2019068605A1 (en) 2017-10-02 2018-10-01 ARTICLE FILTER FOR SMOKERS

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP18783398.3A Division EP3651591B1 (en) 2017-10-02 2018-10-01 Smoking article filter

Publications (1)

Publication Number Publication Date
EP3804539A1 true EP3804539A1 (en) 2021-04-14

Family

ID=63798963

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18783398.3A Revoked EP3651591B1 (en) 2017-10-02 2018-10-01 Smoking article filter
EP20212192.7A Pending EP3804539A1 (en) 2017-10-02 2018-10-01 Smoking article filter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP18783398.3A Revoked EP3651591B1 (en) 2017-10-02 2018-10-01 Smoking article filter

Country Status (10)

Country Link
EP (2) EP3651591B1 (ja)
JP (2) JP2020535790A (ja)
AU (1) AU2018344403A1 (ja)
BR (1) BR112020006272A2 (ja)
CA (1) CA3076302A1 (ja)
CL (1) CL2020000867A1 (ja)
HU (1) HUE053170T2 (ja)
LT (1) LT3651591T (ja)
PL (1) PL3651591T3 (ja)
WO (1) WO2019068605A1 (ja)

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EP4044835A1 (en) * 2019-10-16 2022-08-24 Essentra Filter Products Development Co. Pte. Ltd. A cooling element
EP3747284A1 (en) * 2019-10-16 2020-12-09 Essentra Filter Products Development Co. Pte. Ltd. A cooling element
GB2588212B (en) * 2019-10-16 2024-05-29 Essentra Filter Products Dev Co Pte Ltd A cooling element
WO2021090012A1 (en) * 2019-11-06 2021-05-14 Essentra Filter Products Development Co. Pte. Ltd Filter element, mouthpiece and cooling element
GB202106836D0 (en) * 2021-05-13 2021-06-30 Essentra Filter Products Dev Co Pte Ltd Filter element, mouthpiece and cooling element
WO2023222763A1 (en) * 2022-05-20 2023-11-23 Jt International Sa An aerosol generating article

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PL3651591T3 (pl) 2021-08-02
CL2020000867A1 (es) 2020-09-21
EP3651591B1 (en) 2020-12-09
CA3076302A1 (en) 2019-04-11
LT3651591T (lt) 2020-12-28
JP2020535790A (ja) 2020-12-10
AU2018344403A1 (en) 2020-04-23
BR112020006272A2 (pt) 2020-10-20
WO2019068605A1 (en) 2019-04-11
HUE053170T2 (hu) 2021-06-28
JP2021177763A (ja) 2021-11-18
EP3651591A1 (en) 2020-05-20

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