EP3440947A1 - Filtre à fumée de tabac et procédé de production - Google Patents

Filtre à fumée de tabac et procédé de production Download PDF

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Publication number
EP3440947A1
EP3440947A1 EP18193274.0A EP18193274A EP3440947A1 EP 3440947 A1 EP3440947 A1 EP 3440947A1 EP 18193274 A EP18193274 A EP 18193274A EP 3440947 A1 EP3440947 A1 EP 3440947A1
Authority
EP
European Patent Office
Prior art keywords
filters
filter elements
filter
wrapper
individual
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.)
Granted
Application number
EP18193274.0A
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German (de)
English (en)
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EP3440947B1 (fr
Inventor
Lee Philip O'DONOVAN
Eva MENON
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
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Publication of EP3440947A1 publication Critical patent/EP3440947A1/fr
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Publication of EP3440947B1 publication Critical patent/EP3440947B1/fr
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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
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/40—Hand-driven apparatus for making cigarettes
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive

Definitions

  • the present invention relates to tobacco smoke filters or filter elements and methods of their production.
  • Non-Wrapped Acetate (NWA) filters are well-known in the art.
  • NWA filters comprise a self-sustaining body of continuous crimped cellulose acetate filaments bonded at their points of contact.
  • NWA filters are characterized from conventional cigarette filters because the former do not require a separate plugwrap to wrap the filter and hold the fibrous bundle in place with a controlled circumference.
  • NWA filters may be manufactured by a process similar to that described in UK Patent No. 1169932 ( US3,455,766 ).
  • NWA filters may be sold as Pop-a-TipTM filters for Roll-Your-Own (RYO) Smokers; they are well known and available from Filtrona Filters.
  • Pop-a-Tip filters comprise a series of NWA filters (filter tips) wrapped in a transparent film e.g. made of BOPP or cellophane - e.g. six 14mm filters contained in a Pop-a-Tip rod of 84mm length.
  • the NWA filters are individually pushed (or 'popped') out of the transparent wrap by smokers of RYO products, who then use the filter when rolling their cigarette.
  • NWA filters are preferred over more conventional wrapped acetate (WA) filters, because it is much more difficult to 'pop' a WA filter from the transparent film due to increased frictional forces.
  • WA wrapped acetate
  • the product can be tricky to use as a certain amount of dexterity is required to push the filter tips out from the surrounding film (e.g. some bending and flexing of the Pop-a-Tip may be necessary).
  • the empty film-wrap needs to be separately discarded, creating a potential additional littering problem.
  • a product rod comprising a plurality (e.g. two or more, e.g. 4-6) of individual tobacco smoke filters or filter elements abutted end to end; and a (common) wrapper engaged around the plurality of filters or filter elements, the wrapper including perforations.
  • the individual tobacco smoke filters (or individual tobacco smoke filter elements) are preferably (substantially) identical (with each other).
  • the product rod preferably comprises a plurality (e.g. two or more, e.g. 4-6) of individual identical tobacco smoke filters or individual identical filter elements abutted end to end; and a (common) wrapper engaged around the plurality of filters or filter elements, the wrapper including perforations.
  • a product rod comprising a plurality (e.g. two or more, e.g. 4-6) of individual tobacco smoke filters or filter elements abutted end to end; and a (common) wrapper engaged around the plurality of filters or filter elements, the wrapper including a line of perforations (holes) in register with the or each junction between abutted filters or filter elements (that is, in register with each region where adjacent filters or filter elements abut each other).
  • the individual tobacco smoke filters (or individual tobacco smoke filter elements) are preferably (substantially) identical (with each other).
  • the product rod preferably comprises a plurality (e.g. two or more, e.g.
  • the term identical means the same (equal, alike); in other words each individual filter has such a close similarity or resemblance to the others as to be essentially equal or interchangeable.
  • each (individual) filter may include more than one filter element.
  • each (individual) filter may be a dual or triple filter, as is well known in the art.
  • the wrapper may be a paper (e.g. a plugwrap) or other sheet material.
  • the paper is preferably a paper having basis weight of 15-50gsm, more preferably 17-35gsm.
  • the paper may be air permeable, or impermeable (i.e. air impermeable except where the holes have been generated).
  • the wrapper may be a cellulosic film or a cellulosic based film.
  • the wrapper may be biodegradable.
  • the wrapper has the 'Ready Biodegradability' level of biodegradability as measured according to OECD 301B 'Ready Biodegradability' method (modified Sturm test), which is well known in the art.
  • the product rod of the invention allows the smoker to easily pull or bend the product rod at each join (junction between abutted filters) to snap off individual filters/elements.
  • the perforations (holes) at each junction between abutted filters/elements allow a clean break between abutting filters/elements to be achieved; a jagged break would be unsightly and unacceptable to the consumer.
  • the (outer) wrapper of the snapped-off filter forms part of the filter tip to be used, rather than becoming redundant (as in the case of conventional Pop-a-Tips). Both WA (wrapped acetate) and NWA filters can be used in this product, increasing flexibility for the filter manufacturer.
  • the wrapper includes a line of 16 to 40, e.g. 16 to 39, e.g. 20 to 35, e.g. 30 to 35 perforations (holes) in register with the or each junction between abutted filters or filter elements.
  • the wrapper includes a line of 20 to 35 perforations (holes) in register with the or each junction between abutted filters or filter elements, for a product rod of approximate circumference 17.5mm.
  • the wrapper may include a line of 20 to 40 perforations (holes) in register with the or each junction between abutted filters or filter elements, for a product rod of approximate circumference 17.5mm.
  • the perforations (holes) may be any shape, e.g. oval or rectangular.
  • the perforations (holes) are symmetrical. Oval shaped perforations (holes) are more preferred because they provide a cleaner break in the paper. Rectangular or similar perforations (holes) may be aligned so that their longer side is orientated either across the width or along the length of the wrapper.
  • the perforations (holes) may be made by any means known in the art, e.g. laser, mechanical means or electrostatic means.
  • the perforations (holes) are visible to the naked eye (e.g sufficiently large that the consumer can see them on the outside of the product rod, enabling him to clearly identify the point at which the rod should be snapped).
  • the (e.g. laser perforated) perforations (hole) dimensions may be 0.1mm to 0.7mm along one or both edges.
  • the (e.g. laser perforated) perforations (holes) are preferably spaced at 10 to 25 holes per cm (along the line of perforations), more preferably 11 to 23 holes per cm (along the line of perforations).
  • the perforations (holes) are of nominal dimensions 0.6 mm x 0.3mm, e.g. 0.4 x 0.2mm. The applicants have found that perforations (holes) of this size give a good visual cue.
  • a product rod comprising a plurality of (e.g. two or more, e.g. 4 to 6) individual tobacco smoke filters or filter elements abutted end to end; and a (common) wrapper engaged around the plurality of filters or filter elements, the wrapper including a line of perforations extending from one end of the product rod to the other end and defining a helix about the periphery (outer surface) of the product rod.
  • the consumer peels back a strip along the helical line of perforations to allow filters/filter elements to be sequentially released for use, the remaining wrapper holding the remaining filters in place.
  • the individual tobacco smoke filters are preferably (substantially) identical (with each other).
  • the product rod preferably comprises a plurality (e.g. two or more, e.g. 4-6) of individual identical tobacco smoke filters or individual identical filter elements abutted end to end; and a (common) wrapper engaged around the plurality of filters or filter elements, the wrapper including a line of perforations extending from one end of the product rod to the other end and defining a helix about the periphery (outer surface) of the product rod.
  • the pitch of the helix defined by the line of the perforations is the length of a single individual filter or filter element.
  • peeling back the strip along the line of perforations for a single turn of the helix releases a single filter/filter element.
  • the perforations (holes) may be any shape, e.g. oval or rectangular. Preferably the perforations (holes) are symmetrical. Oval shaped perforations (holes) are more preferred because they provide a cleaner tear in the paper.
  • the perforations (holes) may be made by any means known in the art, e.g. laser, mechanical means or electrostatic means.
  • the (e.g. laser perforated) perforations (hole) dimensions may be 0.1mm to 0.7mm along one or both edges. The (e.g.
  • the laser perforated) perforations (holes) are preferably spaced at 5 to 25 holes per cm (along the line of perforations), for example 10 to 25 holes per cm (along the line of perforations), for example 11 to 23 holes per cm (along the line of perforations).
  • the perforations (holes) are of nominal dimensions 0.6 mm x 0.3mm, e.g. 0.4 x 0.2mm.
  • the holes e.g. oval holes
  • the holes are oriented with their longest axis (i.e. the hole length) perpendicular to the line of perforations.
  • the wrapper may be a paper (e.g. a plugwrap) or other sheet material.
  • the paper is preferably a paper having basis weight of 15-50gsm, more preferably 17-35gsm.
  • the paper may be air permeable, or impermeable (i.e. air impermeable except where the holes have been generated).
  • the wrapper may be a cellulosic film or a cellulosic based film.
  • the wrapper may be biodegradable.
  • the wrapper has the 'Ready Biodegradability' level of biodegradability as measured according to OECD 301B 'Ready Biodegradability' method (modified Sturm test), which is well known in the art.
  • the individual (e.g. identical or substantially identical) filters or filter elements may include a substantially cylindrical core of tobacco smoke filtering material.
  • the individual filter or filter element may further comprise a further wrapper.
  • the further wrapper may be a paper (e.g. plugwrap).
  • the (individual) (e.g. identical or substantially identical) filters or filter elements may comprise a self-sustaining (longitudinally extending) cylindrical core.
  • self-sustaining as in “self-sustaining substantially cylindrical core", “self-sustaining longitudinally extending substantially cylindrical core” etc.
  • a further wrapper of e.g. plugwrap
  • a wrapper to maintain its shape (e.g without requirement for a wrapper to hold the longitudinally extending continuous filaments in alignment to control the radius or circumference of the core).
  • the (individual) (e.g. identical or substantially identical) filters or filter elements may comprise a self-sustaining (longitudinally extending) cylindrical core comprising (e.g. formed from) a plurality of longitudinally extending substantially continuous filaments of tobacco smoke filtering material (e.g. cellulose acetate tow) which are bonded at their points of contact.
  • the filters or filter elements may comprise a self-sustaining (longitudinally extending) cylindrical core comprising (e.g. formed from) a plurality of randomly oriented (e.g. individual or staple) fibres of tobacco smoke filtering material (e.g. cellulose acetate) which are bonded at their points of contact.
  • the continuous filaments of tobacco smoke filtering material are continuous filaments (or randomly oriented fibres) of cellulose acetate tow.
  • the tobacco smoke filtering material e.g. cellulose acetate, cellulose acetate fibres or filaments
  • the filaments (or fibres) are bonded at their points of contact with a bonding constituent, e.g. a plasticiser (e.g. a plasticiser which has been activated or cured to bond the filaments at their points of contact).
  • the self-sustaining longitudinally extending cylindrical core may be, for example, a cylindrical rod of circular cross section.
  • the self-sustaining longitudinally extending cylindrical core may be of other shape, for example the self-sustaining longitudinally extending cylindrical core may be of annular cross section such that the self-sustaining longitudinally extending cylindrical core is a longitudinally extending hollow tube comprising (e.g. formed from) fibres or filaments of tobacco smoke filtering material bonded at their points of contact.
  • the individual (e.g. identical or substantially identical) filters and/or filter elements may further comprise one or more continuous components extending substantially longitudinally (e.g. longitudinally) of the cylindrical core.
  • the (or a, or each) continuous component may be a thread or yarn or tape or continuous extruded element, for example a cotton thread, a cellulose acetate yarn, or a continuous extruded element of e.g. cellulose acetate such as that disclosed in WO2011/058319 .
  • Cigarette filters which include a thread or tape element, typically longitudinally aligned therein, are well known in the prior art. They are often referred to as "Thread Filters". Thread Filters were originally proposed in US 4281671 , in which a cotton sewing thread was the preferred element.
  • US 4281671 also disclosed how the thread could be coloured, e.g. with different colours denoting different flavours.
  • US 4281671 discloses Thread Filters which require a wrapper around the tobacco smoke filtering material (and thread); it does not disclose filters or filter elements which include a thread but which are self sustaining (i.e. stable, rigid and self-supporting without requirement for a further wrapper).
  • the (or a, or each) continuous component extending longitudinally of the cylindrical core may be coloured or tinted, e.g. using appropriate dyes or pigments, preferably those with regulatory approval for use in food contact applications.
  • the (or a, or each) continuous component may be of a contrasting colour to the tobacco smoke filtering material.
  • the (or a, or each) continuous component further comprises a dye or pigment (e.g a dye or pigment which has regulatory approval for use in food contact applications).
  • the dye or pigment may preferably be any colour which contrasts with the (e.g. white) tobacco smoke filtering material, for example green, blue, red, orange etc. If two or more continuous components extending substantially longitudinally (e.g.
  • the first continuous component may be of the same colour, or a different colour, to the second continuous component.
  • coloured component(s) e.g. coloured cotton thread or threads
  • the continuous component may bear a smoke modifying agent such as a flavouring agent.
  • the flavouring agent may be any flavouring agent known for use in tobacco smoke filters or filter elements.
  • the flavouring agent may be menthol, spearmint, peppermint, nutmeg, cinnamon, clove, lemon, chocolate, peach, strawberry, vanilla etc.
  • the agent may contain nicotine or a salt or derivative thereof.
  • the flavouring agent is menthol.
  • the individual (e.g. identical or substantially identical) filters or filter elements may include an additive (e.g. an adsorbent).
  • the additive may be a particulate additive.
  • the particulate additive may any particulate additive suitable for use in a tobacco 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 include a flavourant - e.g. menthol - e.g.
  • the additive may be sepiolite granules to which menthol has been applied.
  • the individual (e.g. identical or substantially identical) filters or filters element may comprise a longitudinally extending core of tobacco smoke filtering material and an additive (e.g. carbon) with at least one end free of additive (to present a clean end to the smoker).
  • the individual filters or filters element may be 'monocarbon' filters or filter elements - i.e. a filters/elements including a single longitudinally extending core of filtering material and additive (e.g. carbon) that has at least one end free of additive and e.g. which can be manufactured in a one-pass process (e.g. the 'Active Patch' filter, as disclosed in, for example, GB 2261152 , and the 'Smooth Core' filter, as disclosed in, for example, WO 2006/059134 ).
  • the individual (e.g. identical or substantially identical) filters may comprise: a downstream (e.g. longitudinally extending, e.g. substantially cylindrical) core of tobacco smoke filtering material; an upstream (e.g. longitudinally extending, e.g. substantially cylindrical) core of tobacco smoke filtering material spaced longitudinally (upstream) of the downstream core; a wrapper (e.g. an outer wrapper) engaged around and joining the spaced upstream and downstream cores to define a cavity between the spaced upstream and downstream cores.
  • the filter may include an additive in the cavity such that the individual filters are triple granular filters.
  • the tobacco smoke filter or filter element may be of circumference 14 to 28 mm, for example 16 to 26 mm, for example 16 to 19 mm (e.g.
  • a tobacco smoke filter of the invention may be of length 10 to 40 mm, e.g. 11 to 25 mm, e.g. 12 to 16 mm, e.g. 14mm.
  • 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 from product rods may be used generally 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 method of producing a product rod comprising a plurality (e.g 2 or more, e.g. 4 to 6) of individual (e.g. identical or substantially identical) tobacco smoke filters or filter elements abutted end to end, and a wrapper engaged around the plurality of filters or filter elements, wherein the wrapper includes perforations; the method comprising:
  • the wrapper may be perforated such that it has a line of perforations in register with the or each junction between abutted filters/filter elements/dual filter rods.
  • the wrapper may be perforated such that it has a line of perforations extending from one end of the product rod to the other end and defining a helix about the periphery (outer surface) of the product rod.
  • the perforations (holes) may be any shape, e.g. oval or rectangular. Preferably the perforations (holes) are symmetrical.
  • the perforations (holes) may be made by any means known in the art, e.g. laser, mechanical means or electrostatic means. The (e.g.
  • the wrapper may be perforated with (e.g. laser perforated) perforations (holes) which are preferably spaced at 5 to 25 holes per cm (along the line of perforations), for example 10 to 25 holes per cm (along the line of perforations), for example 11 to 23 holes per cm (along the line of perforations).
  • the wrapper is perforated with perforations (holes) of nominal dimensions 0.6 mm x 0.3mm, e.g. 0.4 x 0.2mm.
  • the wrapper is perforated with the perforations (e.g. oval holes) oriented with their longest axis (i.e. the hole length) perpendicular to the line of perforations.
  • a method of producing a product rod comprising a plurality (e.g 2 or more, e.g. 4 to 6) of individual (e.g. identical or substantially identical) tobacco smoke filters or filter elements abutted end to end, and a wrapper engaged around the plurality of filters or filter elements, wherein the wrapper includes perforations; the method comprising:
  • the wrapper may be perforated such that it has a line of perforations in register with the or each junction between abutted filters/filter elements/dual filter rods.
  • the wrapper may be pre-perforated with (lateral) lines of perforations aligned across the width of the wrapper, each row being separated from the adjacent row by a distance corresponding to the length of a single filter/filter element.
  • the method may include a step of aligning/registering the lateral lines of perforations with the junctions between abutted filters/filter elements (e.g. prior to or during wrapping).
  • the method includes a step of generating - e.g. with a laser - (lateral) lines of perforations across the width of the (non-perforated) wrapper prior to, preferably immediately prior to, application of the wrapper.
  • the perforations (holes) may be any shape, e.g. oval or rectangular. Preferably the perforations (holes) are symmetrical.
  • the perforations (holes) may be made by any means known in the art, e.g. laser, mechanical means or electrostatic means.
  • the (e.g. laser perforated) perforations (hole) dimensions may be 0.1mm to 0.7mm along one or both edges.
  • the (e.g. laser perforated) perforations (holes) are preferably spaced at 5 to 25 holes per cm (along the line of perforations), for example 10 to 25 holes per cm (along the line of perforations), for example 11 to 23 holes per cm (along the line of perforations).
  • the perforations are of nominal dimensions 0.6 mm x 0.3mm, e.g. 0.4 x 0.2mm.
  • perforations e.g. oval holes
  • the longest axis i.e. the hole length
  • the wrapper may be pre-perforated such that it has a line of perforations extending from one end of the product rod to the other end and defining a helix about the periphery of the product rod.
  • the wrapper may be a cellulosic film or a cellulosic based film.
  • the wrapper may be biodegradable.
  • the wrapper has the 'Ready Biodegradability' level of biodegradability as measured according to OECD 301B 'Ready Biodegradability' method (modified Sturm test), which is well known in the art.
  • the wrapper is a paper (e.g. plugwrap).
  • the (e.g. individual e.g. pre-formed) filters and/or (e.g. individual e.g. pre-formed) filter elements in the flow (of filters or filter elements) are preferably aligned such that the longitudinally axes of their cylindrical cores are oriented along the longitudinal direction of the flow.
  • the invention includes any filter cigarette made using a filter according to the invention.
  • FIGURE 1 schematically illustrates a product rod of filters according to an embodiment of the invention
  • FIGURE 2 is a different view of the product rod of filters of Figure 1
  • FIGURE 3 schematically illustrates a method and apparatus which may be used to manufacture the product of e.g. Figures 1 and 2
  • FIGURE 4 illustrates a product rod of filters according to a further embodiment of the invention
  • FIGURE 5 shows the results of testing products of the invention (Example 1).
  • Figures 1 and 2 show a NWA "Rip-a-Tip”TM product rod 1 according to one embodiment of the invention.
  • the product rod 1 comprises six individual tobacco smoke filters 3 each of around 17.5 mm circumference and length 14mm abutted end to end.
  • the individual tobacco smoke filters 3 are identical with each other.
  • Each filter 3 includes a self-sustaining substantially cylindrical core formed from a plurality of longitudinally extending substantially continuous filaments of crimped cellulose acetate tow which are bonded at their points of contact (i.e. each filter 3 is a NWA filter).
  • the product rod 1 also includes a wrapper 5 comprising paper of basis weight 25 gsm which is engaged around the filters 3 thereby forming a wrapped cylinder of six filter elements of length 84mm.
  • the wrapper includes five lines of perforations 7, each line including thirty oval holes of hole size about 0.6 x 0.3 mm (aligned such that the length of each oval hole is aligned with the longitudinal axis of the product rod 1).
  • Each line of perforations 7 is in register with a junction between two abutted filters 3 (in other words, in register with each region where adjacent filters or filter elements abut each other).
  • the holes in the wrapper can be made by any means known in the art, e.g. laser, mechanical or electrostatic means; suitable methods are described below.
  • the smoker takes product rod 1 and pulls or bends the rod at the join closest to one end of the product rod (indicated by the line of perforations closest to the end) to snap off an individual filter; the filter is then used when rolling a RYO cigarette.
  • the oval holes of hole size about 0.6 x 0.3 mm are sufficiently large that the consumer can see them on the outside of the finished rod 3, enabling him to clearly identify the point at which the rod should be snapped.
  • the lines 7 of perforations (holes) enable a clean break between adjoining tips to be achieved - a jagged break would be unsightly and unacceptable to the consumer.
  • the section of the outer wrapper 5 around the individual filter is retained and forms part of the filter to be used, rather than becoming redundant (and discarded) in the case of conventional Pop-a-Tips.
  • Figure 3 shows a method and apparatus according to a further embodiment of the invention which may be used to manufacture the product of Figures 1 and 2 .
  • a flow of pre-formed filters 103 and pre-formed dual filter rods 103a is longitudinally advanced in the direction of arrow 104 into a garniture unit 106.
  • the pre-formed (identical) filters 103 are each of around 17.5 mm circumference and length 14 mm.
  • Each filter 103 includes a self-sustaining substantially cylindrical core formed from a plurality of longitudinally extending substantially continuous filaments of crimped cellulose acetate tow which are bonded at their points of contact.
  • the pre-formed dual filter rods 103a are each of around 17.5 mm circumference and length 28 mm.
  • Each rod 103a includes a self-sustaining substantially cylindrical core formed from a plurality of longitudinally extending substantially continuous filaments of crimped cellulose acetate tow which are bonded at their points of contact.
  • the filters 103 are NWA filters and may, as well as dual rods 103a, be manufactured by a process similar to that described in UK Patent No.
  • the belt and tow therewithin are then moved through a cooling station where cool air or other fluid is passed through the belt into contact with the tow to deactivate the plasticizer, if necessary, and dry the tow by removal of condensed steam, whereby the tow is made rigid to form a continuous self sustaining and stable longitudinally extending rod.
  • the continuous self sustaining and stable longitudinally extending rod is cut into base rods of filters for subsequent use also by methods well known in the art.
  • Pop-a-Tip manufacture takes place on a dual rod filter making machine. These machines are well known in the art and normally used for combining two different types of base rod, which are held in two different hoppers on the machine.
  • the two hoppers are filled with the same base rod type and these base rods are cut down (to provide the required tip length), aligned in an end-to-end relationship, wrapped in transparent film and cut to the final required Pop-a-Tip length.
  • the two hoppers of the dual rod filter making machine (not shown) are also filled with base rods of filters 103 manufactured as set out above.
  • One hopper is used to cut down the base rods to individual filters 103 of the required tip length (14mm) and the other hopper is used to cut down the base rods to dual filter rods 103a of the required tip length (28mm) and the dual rod machine is then set to arrange and align the filters 103 and dual filter rods 103a in an end-to-end relationship such that each dual filter rod 103 is separated form the next rod 103a by four individual filters 103 to provide the flow of pre-formed filters 103 and multiple (dual) filter rods 103a.
  • the filters 103 are aligned and abutted end to end (i.e. there are no spaces between individual filters 103 or filters 103 and filter rods 103a) prior to longitudinal advancement in the direction of arrow 104 into the garniture unit 106.
  • the garniture unit 106 includes a compression shoe 108 through which the aligned and abutted filters 103 and dual filter rods 103a are passed prior to wrapping in the garniture. Compression shoes are known in the art for control of the final circumference of the finished rod.
  • a wrapper 105 of paper of basis weight 25 gsm is applied to the continuously advancing flow of filters or filter elements in the garniture 106 in the conventional manner, to thereby form a continuous wrapped rod 111 comprising groups of four individual filters 103 separated by dual filter rods 103a.
  • the continuous wrapped rod 111 is then cut in register with a position half way along each dual filter rod 103a (see arrow 222) by methods known in the art to provide intermediate product rods of around 17.5mm circumference and 84mm length, each containing six individual, identical, 14 mm long filters 103 in a common paper wrapper.
  • each line of perforation holes (in the above case these would be spaced 14mm apart) are closely aligned with (in register with) the region where adjoining tips abut.
  • This may be achieved by the use of an on-line laser perforation system (not shown) after each filter rod (e.g. of 84mm length) has been assembled.
  • Such a laser perforator generates holes around the periphery of the rod in defined locations in a manner that is well-known for the online perforation of filter ventilation holes during cigarette assembly.
  • the laser perforator generates five lines of perforations around the periphery of the rod: each line includes thirty oval holes of hole size about 0.6 x 0.3 mm, e.g. 0.4 x 0.2 mm; and each line of perforations is in register with a junction between two abutted filters.
  • the resulting perforated product rod is a product as shown in Figures 1 and 2 .
  • the perforations may be achieved, including: a) use of a pre-perforated wrapper in which the perforations are aligned in rows across the width of the wrapper, each row being separated from the adjacent row by a distance (e.g. 14mm) corresponding to the length of the filter and then employing a suitable registration system to ensure that these rows are maintained in alignment with the flow of filter tips during filter rod assembly; and b) a system similar to (a) in which, rather than the wrapper being pre-perforated, a series of lateral perforation lines are generated in the (non-perforated) wrapper as part of the filter production process immediately prior to it being used to wrap the filter tips.
  • Figure 4 shows a NWA "Rip-a-Tip”TM product rod 51 according to another embodiment of the invention.
  • the product rod 51 comprises six individual (identical) tobacco smoke filters 53 each of around 17.5 mm circumference and length 14mm abutted end to end.
  • Each filter 53 includes a self-sustaining substantially cylindrical core formed from a plurality of longitudinally extending substantially continuous filaments of crimped cellulose acetate tow which are bonded at their points of contact (i.e. each filter 53 is a NWA filter).
  • the product 51 also includes a wrapper 55 comprising paper of basis weight 25 gsm which is engaged around the filters 53 thereby forming a wrapped cylinder of six filter elements of length 84mm.
  • the wrapper includes a lines of perforations 57 extending from one end of the product rod 51 to the other (end) and defining a helix (spiral) about the periphery of the product rod.
  • the perforations are oval holes of hole size about 0.4 x 0.2 mm.
  • the holes in the wrapper can be made by any means known in the art, e.g. laser, mechanical or electrostatic means, e.g. by the methods described above. It will be appreciated that if the wrapper is pre-perforated (i.e. perforated before application to the filters/elements of the product rod), the perforations (holes) will have to be carefully located so they form a continuous helix after the wrapper is wrapped around the filters/elements.
  • the consumer peels back a strip of the wrapper along the helical line of perforations to allow individual filter tips to be sequentially released for use; the remaining portion of the wrapper holds the remaining filters in place. It will be appreciated that in this case the wrapper is discarded, rather than remaining part of the filter.
  • the pitch of the helix defined by the line of the perforations 57 may be 14mm, the length of a single individual filter or filter element.
  • peeling back a single turn of the helix of the wrapper releases a single filter/filter element.
  • the applicants carried out trials to identify the most appropriate size and spacing of holes to enable (i) a clean break, or "snap" of the filter from the product rod and (ii) a suitable visual cue for the consumer.
  • the applicants made filter rods (of 17.9mm circumference) similar to those shown in Figures 1 and 2 , using NWA filters and a perforated plugwrap paper.
  • the plugwrap paper was perforated with various numbers of either rectangular or oval holes of nominal dimensions 0.2 x 0.4 mm (with the length of hole orientated along the length of the paper/filter rods - in other words the holes are oriented with their longest axis (i.e. the hole length) perpendicular to the line of perforations). Measurements subsequently made using a microscope showed that the actual hole size was closer to 0.6 x 0.3 mm.
  • the manufactured rods were tested by "snapping" or pulling off one filter from the rest along the line of the perforations.
  • the oval hole shape provides a smoother and more even separation line after ripping ("snapping") an individual filter off the rod ( Figure 5 ).
  • the example therefore shows that 30 to 35 rectangular or oval shaped holes of nominal dimensions 0.4 x 0.2mm around the circumference of a 17.9 mm circumference Pop-a-Tip provide optimum 'snap' characteristics (see Figure 5 ). Less than around 15 holes of such size give an uneven 'snap', whilst more than 35 or 40 holes can result in the paper being too weak to be processed on conventional filter making or packaging machinery.
  • This Example measures the tensile strength of a plug wrap that has been perforated in accordance with aspects of the invention.
  • the test is designed to assess the runnability of a pre-perforated paper on a filter making machine.
  • Strips of non-porous plug wrap paper of 27gsm basis weight as supplied by Textilfabrik Wattens GmbH of Austria were perforated by laser providing an array of holes each nominally 0.4 x 0.2mm.
  • An array of holes were produced at 10, 20, 30, 40, 50 and 60 holes per 17.5mm width and the tensile strength measured.
  • test method involved cutting the plug into test pieces of 180mm length x 15mm width, with each test strip having a single line of holes. Testing was carried out using a Lloyd L500 tensile tester, using a load range of 0-10.0 Kgf , extension range 0-1000mm and crosshead speed set to ensure that the sample broke within 15 to 25 seconds.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
EP18193274.0A 2012-05-25 2013-05-24 Filtre à fumée de tabac et procédé de production Active EP3440947B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB1209345.6A GB201209345D0 (en) 2012-05-25 2012-05-25 Tobacco smoke filter and method of production
EP13725149.2A EP2854571B1 (fr) 2012-05-25 2013-05-24 Filtre à fumée de tabac et procédé de fabrication
PCT/EP2013/060732 WO2013174975A1 (fr) 2012-05-25 2013-05-24 Filtre à fumée de tabac et procédé de fabrication

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP13725149.2A Division EP2854571B1 (fr) 2012-05-25 2013-05-24 Filtre à fumée de tabac et procédé de fabrication
EP13725149.2A Division-Into EP2854571B1 (fr) 2012-05-25 2013-05-24 Filtre à fumée de tabac et procédé de fabrication

Publications (2)

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EP3440947A1 true EP3440947A1 (fr) 2019-02-13
EP3440947B1 EP3440947B1 (fr) 2022-10-26

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US (3) US20150096578A1 (fr)
EP (2) EP3440947B1 (fr)
AU (1) AU2013265207B2 (fr)
ES (1) ES2930323T3 (fr)
GB (1) GB201209345D0 (fr)
HU (1) HUE060398T2 (fr)
LT (1) LT3440947T (fr)
PL (1) PL3440947T3 (fr)
RU (1) RU2648208C2 (fr)
WO (1) WO2013174975A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3003905B1 (fr) 2013-06-03 2020-05-13 Essentra Filter Products Development Co. Pte. Ltd Distributeur de matériau particulaire, produit
WO2014195250A1 (fr) 2013-06-03 2014-12-11 Essentra Filter Products Development Co. Pte. Ltd Procédé de fabrication d'un distributeur
DE102015105368A1 (de) 2015-04-09 2016-10-13 Hauni Maschinenbau Ag Längenerfassen eines Segments eines stabförmigen Artikels der Tabak verarbeitenden Industrie
JP6951370B2 (ja) * 2016-07-04 2021-10-20 ジェイティー インターナショナル エス．エイ．ＪＴ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｓ．Ａ． 取り外し可能なフィルターセグメントを有する喫煙物品
RU2749663C2 (ru) 2016-12-29 2021-06-16 Филип Моррис Продактс С.А. Изделие, генерирующее аэрозоль, имеющее диспергируемый в воде фильтрующий компонент
JP7235444B2 (ja) * 2018-05-09 2023-03-08 小林製薬株式会社 ミシン目付きシート材
USD993524S1 (en) * 2021-09-09 2023-07-25 Hemp Tips, Ltd. Tip for hand-rolled cigarettes

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US2804078A (en) * 1954-10-13 1957-08-27 Jacob A Saffir Filter type cigarettes
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WO2008075032A1 (fr) * 2006-12-19 2008-06-26 Filtrona International Limited Filtre à fumée de tabac

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DE3437882A1 (de) * 1984-10-16 1986-04-17 Max 8370 Regen Liebich System zur selbstverfertigung von zigaretten durch den verbraucher
US4971078A (en) * 1989-08-15 1990-11-20 Hoechst Celanese Corporation Filter for a smoking article containing a flavored hollow fiber
KR100406603B1 (ko) * 1998-05-12 2003-11-21 니뽄 다바코 산교 가부시키가이샤 궐련필터 권취지, 궐련필터 및 필터부착 궐련
US20060021625A1 (en) * 2004-07-30 2006-02-02 Philip Morris Usa Inc. Make-your-own smoking article with controlled burn rate
PT1889550E (pt) * 2006-08-04 2009-10-26 Philip Morris Prod Filtro multi-componente proporcionando aromas múltiplos melhorados
EP1972213A1 (fr) * 2007-03-21 2008-09-24 Philip Morris Products S.A. Filtre multi-composant fournissant une amélioration de la saveur
TW200936065A (en) * 2008-01-23 2009-09-01 Filtrona Int Ltd Tobacco smoke filter
CA2631413A1 (fr) * 2008-05-15 2009-11-15 Imperial Tobacco Canada Limited Trousse d'assemblage d'articles pour fumeur
CA2872287A1 (fr) * 2012-08-01 2014-02-06 Celanese Acetate Llc Procedes de production de filtres et de tiges de filtres comprenant des masses poreuses et articles correspondants

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US2747579A (en) * 1952-12-10 1956-05-29 Milton G Gage Filter tip cigarette
US2804078A (en) * 1954-10-13 1957-08-27 Jacob A Saffir Filter type cigarettes
DE2909432A1 (de) * 1979-03-07 1980-09-11 Karl Friedrich Schaefer Zigarettenfilter
DE3729759A1 (de) * 1987-09-02 1989-03-16 Julian Hildebrandt Filterzigarette
WO2008075032A1 (fr) * 2006-12-19 2008-06-26 Filtrona International Limited Filtre à fumée de tabac

Also Published As

Publication number Publication date
EP3440947B1 (fr) 2022-10-26
EP2854571A1 (fr) 2015-04-08
US20210360962A1 (en) 2021-11-25
LT3440947T (lt) 2022-12-12
US20150096578A1 (en) 2015-04-09
GB201209345D0 (en) 2012-07-11
EP2854571B1 (fr) 2018-11-28
AU2013265207B2 (en) 2016-07-28
WO2013174975A1 (fr) 2013-11-28
AU2013265207A1 (en) 2014-12-04
PL3440947T3 (pl) 2023-03-06
HUE060398T2 (hu) 2023-02-28
ES2930323T3 (es) 2022-12-09
US20200205466A1 (en) 2020-07-02
RU2648208C2 (ru) 2018-03-22
RU2014149132A (ru) 2016-07-20

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