EP3254570B1 - Procédé de production de cigarettes à filtre, filtre et cigarette à filtre - Google Patents

Procédé de production de cigarettes à filtre, filtre et cigarette à filtre Download PDF

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Publication number
EP3254570B1
EP3254570B1 EP17172762.1A EP17172762A EP3254570B1 EP 3254570 B1 EP3254570 B1 EP 3254570B1 EP 17172762 A EP17172762 A EP 17172762A EP 3254570 B1 EP3254570 B1 EP 3254570B1
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EP
European Patent Office
Prior art keywords
filter
core
cigarette
sheath
hollow
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.)
Active
Application number
EP17172762.1A
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German (de)
English (en)
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EP3254570A1 (fr
Inventor
Sadao Ogi
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.)
Japan Tobacco Inc
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Japan Tobacco Inc
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Publication date
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Priority to EP17172762.1A priority Critical patent/EP3254570B1/fr
Publication of EP3254570A1 publication Critical patent/EP3254570A1/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
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
    • A24D3/0291—Manufacture of tobacco smoke filters for filters with special features for hollow tipped filters, e.g. recess filters
    • 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
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • 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
    • A24D3/0233—Filter rod forming processes by means of a garniture
    • 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
    • A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
    • A24D3/0279—Manufacture of tobacco smoke filters for filters with special features with tubes
    • 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
    • A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
    • A24D3/0287—Manufacture of tobacco smoke filters for filters with special features for composite filters
    • 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

  • the present invention relates to a filter cigarette producing method, a filter, and a filter cigarette.
  • a filter including such a through hole compared to an ordinary filter, has a heavier weight of cellulose acetate tow, and also has a higher additive rate of a plasticizer added to the cellulose acetate tow. This configuration provides sufficient stiffness of the filter, and retains a through hole shape of the filter.
  • Patent Document 1 International Publication No. 2011/114440
  • US 4 179 323 A describes a hollow filter including a rigid non-deformable tube defining a smoke passage having a draw resistance to control the amount of unfiltered smoke, a concentric layer of filter material and a perforated outer wrap for passage of air into the layer of filter material.
  • JP 3 022624 B2 describes a rod-shaped fiber material produced by covering the outer circumference of a filling material with a covering material consisting of a fiber structure.
  • each produced hollow filter is needed to be conveyed through a passage narrower than its filter diameter with the filter being squeezed in a post-treatment, such as a step of wrapping a tipping paper to connect the filter to a cigarette.
  • a post-treatment such as a step of wrapping a tipping paper to connect the filter to a cigarette.
  • the shape of the through hole may be deformed at end portions of the filter.
  • a projection projecting toward the passage for the sake of triggering off rotation of the filters so that the filters are securely fed into the passage. Enhancement of conveyance speed of the filters due to improvement of producing performance in the apparatus raises a significant problem that causes deformation in shape of the through holes when the filters are passed through the above projection.
  • An object of the present invention which has been made in order to solve the problems described above, is to provide a filter cigarette producing method, a filter, and a filter cigarette that are capable of reducing deformation in shape of a through hole of a hollow filter even if the hollow filter is pressed in a post-treatment step of producing a filter cigarette using the hollow filter.
  • a filter cigarette producing method not according to the invention including: a core forming fiber processing step of adding a plasticizer to core forming fibers having a total fineness of 23000 denier to 70000 denier so as to attain an additive rate of 13% to 40%; a sheath forming fiber processing step of adding a plasticizer to sheath forming fibers having a total fineness of 10000 denier to 47000 denier so as to attain an additive rate of 15% or less, or adding no plasticizer to the sheath forming fibers so as to attain an additive rate of 0%; a hollow filter forming step of forming a hollow filter subsequent to the core forming fiber processing step and the sheath forming fiber processing step in such a manner that the core forming fibers are hardened into a core including a hole extending from one end surface toward the other end surface, and an outside of the core is covered with the sheath forming fibers so as to form a sheath, thereby forming the hollow filter;
  • the additive rate of the plasticizer (%) in the present specification is defined by a calculation formula: weight of plasticizer / weight of tow fibers ⁇ 100 .
  • the additive rate of the plasticizer relative to the core forming fibers be 13% to 35%, and the additive rate of the plasticizer relative to the sheath forming fibers be approximately 3% to 12%.
  • the post-treatment step include a filter attaching step of feeding the hollow filter and cigarettes through a rolling passage as the narrower section, the rolling passage being provided with a projection projecting inward of the rolling passage so as to trigger off rolling of the hollow filter and the cigarettes when the hollow filter and the cigarettes are introduced into the rolling passage; and wrapping the hollow filter and the cigarettes with tipping paper in the rolling passage, thereby connecting the hollow filter and the cigarette to each other.
  • the present invention provides a cylindrical hollow filter including a hole extending from one end surface toward the other end surface, wherein the hollow filter further includes: a core having the hole extending from one end surface toward the other end surface; and a sheath covering an outside of the core, a boundary line is present between the core and the sheath, the core comprises core forming fiber, the sheath comprises sheath forming giber, the core has an additive rate of a plasticizer of 13% to 40%, and the sheath has an additive rate of the plasticizer of 0% to 15%.
  • the present invention further provides a filter comprising: the aforementioned cylindrical hollow filter including an adsorbing filter continuously connected to the hollow filter in a longitudinal direction.
  • the core has a total fineness of 23000 denier to 70000 denier
  • the sheath has a total fineness of 10000 denier to 47000 denier.
  • the present invention provides a filter cigarette comprising: the aforementioned filter; a cigarette formed by wrapping cut tobacco with cigarette paper; and tipping paper used for wrapping the filter and the cigarette in a manner as to connect the filter and the cigarette in a longitudinal direction.
  • the present invention it is possible to reduce deformation in shape of the through holes even if the hollow filters are pressed in the post-treatment step of producing the filter cigarettes using the hollow filters.
  • the filter cigarette producing machine 1 includes a first and a second feed paths 2, 3 where core forming fibers 4 and sheath forming fibers 5 are continuously fed and travel in respective arrow directions in the drawing.
  • the respective arrows along the feed paths 2, 3 in FIG. 1 indicate respective traveling directions of the core forming fibers 4 and the sheath forming fibers 5.
  • a tow bale 28 of a bunch of the core forming fibers 4 or a bunch of the sheath forming fibers 5 that are formed of, for example, cellulose acetate fibers.
  • a first fiber-opening and plasticizer-applying device 7 is provided in the first feed path 2.
  • the first fiber-opening and plasticizer-applying device 7 opens the core forming fibers 4 traveling in the first feed path 2 using a conventional banding jet, a pair of pretension rollers, a pair of blooming rollers, and the like.
  • a plasticizer is added to the opened core forming fibers 4 using a conventional jet spray or the like.
  • a second fiber-opening and plasticizer-applying device 8 having the same function as that of the first fiber-opening and plasticizer-applying device 7 is provided in the second feed path 3 where the sheath forming fibers 5 travel.
  • the first and the second feed paths 2, 3 are connected to a hole forming device 9.
  • the hole forming device 9 (see FIG. 2 ) will be described later.
  • the hole forming device 9 produces an intermediate 54 for hollow filters, the intermediate 54 having a through hole 10 formed therein along its longitudinal direction.
  • the intermediate 54 is fed through a conveyance path 12 to a paper wrapping device 13.
  • the intermediate 54 is produced through a trumpet guide 18 provided at an inlet side of the paper wrapping device 13, but in the present specification, the trumpet guide 18 is treated as a part of the hole forming device 9 for convenience.
  • the paper wrapping device 13 wraps the intermediate 54 with wrapping paper 30 (see FIG. 4 ) into a hollow filter rod (see FIG. 3 ).
  • each hollow filter 11 and an adsorbing filter 31 for adsorbing components in smoke are wrapped together around their entire outer peripheries with forming paper 32 (see FIG. 4 ) in a state of being aligned in their longitudinal direction.
  • the hollow filter 11 and the adsorbing filter 31 wrapped together with the forming paper 32 constitute a filter 22 (see FIG. 4 ), and then each filter 22 is conveyed to a filter attaching device 14 so as to be connected to a cigarette 16 through tipping paper 15.
  • the hollow filter 11 may adsorb components in the smoke, or substantially may not adsorb the components in the smoke.
  • the hole forming device 9 includes a hole forming tube 17, the trumpet guide 18, and a mandrel 19.
  • the mandrel 19 is supported at its one end by a support base 20, and extends from an inlet side for the core forming fibers 4 into the hole forming tube 17.
  • the hole forming tube 17 has a hollow cylindrical shape
  • the trumpet guide 18 has a hollow cylindrical shape having an inlet side with an enlarged diameter
  • the sheath forming fibers 5 are squeezed to be fed together with the core forming fibers 4 through the trumpet guide 18.
  • the core forming fibers 4 having passed through the first fiber-opening and plasticizer-applying device 7 are fed into the hole forming tube 17.
  • the core forming fibers 4 are passed through a passage defined by the hole forming tube 17 and the mandrel 19, and then are heated in the hole forming tube 17 to be formed into a core 11a of a hollow cylindrical shape including a through hole 10 which is formed by the outer shape of the mandrel 19 and extends in the longitudinal direction of the mandrel 19.
  • the heating process is carried out by means of a heating device 50.
  • the heating device 50 is provided as holes 51 extending through a peripheral wall of the hole forming tube 17, and steam is sent into the hole forming tube 17 through these holes 51.
  • the heating device 50 encourages plasticization of the core forming fibers 4 to be hardened while the core forming fibers 4 are passed through the hole forming tube 17.
  • a new heat source such as microwaves, heated air, and heating wires, may be used instead of using the steam.
  • the hole forming tube 17 has a diameter gradually enlarged toward an inlet thereof for the sake of facilitating stable introduction of the core forming fibers 4.
  • the inlet of the hole forming tube 17 has a curved shape.
  • the plasticizer may be added from the inside of the core forming fibers 4 onto the fibers 4 before the core forming fibers 4 is introduced into the hole forming tube 17.
  • part of the support base 20 is formed as a spray nozzle to add the plasticizer therefrom (arrows S in FIG. 2 ).
  • the plasticizer is supplied to a portion which is to become a surface of the through hole 10 by adding the plasticizer from the above position, thereby appropriately hardening the surface of the through hole 10.
  • Such local addition of the plasticizer from the support base 20 enables sufficient hardening of the core forming fibers 4 even with a small amount of the plasticizer.
  • the through hole 10 having the surface hardened in the above manner can be prevented from being crushed at the cross section of the hollow filter 11 when the hollow filter 11 is obtained by cutting.
  • the trumpet guide 18 having the same axis as that of the hole forming tube 17 is disposed on an outlet side of the hole forming tube 17.
  • the core 11a formed by the hole forming tube 17 is delivered out as it is, and then is introduced into the trumpet guide 18.
  • the sheath forming fibers 5 having passed through the second fiber-opening and plasticizer-applying device 8 are introduced into the trumpet guide 18.
  • the sheath forming fibers 5 are passed through a passage formed by the trumpet guide 18 and the core 11a so as to be formed into a sheath 11b that covers the outside of the core 11a.
  • the intermediate 54 is wrapped with the wrapping paper 30 on a garniture belt 55 to be formed into the hollow filter rod.
  • the wrapping paper 30 on the garniture belt 55 is not shown in FIG. 2 for convenience of showing the state of the sheath 11b covering the outside of the core 11a.
  • the hollow filter 11 formed in the above manner has a double structure having the core 11a as an inner tube and the sheath 11b as an outer tube, as shown in FIG. 3 .
  • the core 11a and the sheath 11b are clearly separated at a boundary line 21 in a cross section of the hollow filter 11.
  • the diameter thereof may be 7.4 mm to 8.0 mm
  • the diameter of the core 11a may be 4.6 mm to 5.2 mm.
  • the diameter thereof may be 5.0 mm to 7.3 mm
  • the diameter of the core 11a may be 2.4 mm to 4.7 mm.
  • the core 11a for the hollow filter 11 whose diameter is 7.4 mm to 8.0 mm may have a diameter of 2.4 mm to 4.7 mm.
  • Such a hollow filter 11 is produced in the following producing method (see FIG. 5 ) .
  • a core forming fiber processing step is carried out (step S1).
  • the core forming fiber processing step is carried out by using the first fiber-opening and plasticizer-applying device 7.
  • the total fineness of the core forming fibers 4 is set to be 23000 denier to 70000 denier (2555.3 tex to 7777 tex).
  • the fibers may be formed of cellulose acetate fibers, etc.
  • the core forming fibers 4 fed into the first feed path 2 are opened, and the plasticizer is added to the fibers at an additive rate of 13% to 40% (preferably 15 to 35%, most preferably 17 to 30%).
  • This additive rate of the plasticizer is a value defined by the sum of addition of the plasticizer through the first fiber-opening and plasticizer-applying devicet and local addition of the plasticizer from the support base 20.
  • a sheath fiber processing step is carried out (step S2).
  • the sheath forming fiber processing step is carried out by using the second fiber-opening and plasticizer-applying device 8.
  • the total fineness of the sheath forming fibers 5 is set to be 10000 denier to 47000 denier (1888.7 tex to 2999.7 tex).
  • the fibers may be formed of cellulose acetate fibers, etc.
  • the sheath forming fibers 5 fed into the second feed path 3 are opened, and the plasticizer is added to the fibers at an additive rate of 15% or less (preferably 3 to 12%, most preferably 6 to 9%). Alternatively, no plasticizer may be added.
  • a hollow filter forming step is carried out (step S3).
  • the hollow filter forming step is carried out by using the hole forming device 9.
  • the core forming fibers 4 are formed into the core 11a in a cylindrical shape including the through hole 10 extending in its longitudinal direction, and the outer periphery of the core 11a is covered with the sheath forming fibers 5, thereby producing the sheath 11b; and this sheath 11b is wrapped with the wrapping paper 30 to be formed into the hollow filter rod, or the hollow filter 11.
  • the hollow filter 11 is subjected to a filter attaching step (step S4) as an example of a post-treatment step, and the filter attaching apparatus 14 used in this step will be described, herein. More specifically, the filter attaching device 14 shown in FIG. 6 is used for producing filter cigarettes 27 by using the hollow filters 11. Firstly, in the filter attaching apparatus 14, each filter plug 37 is placed between two cigarettes 16. The filter plug 37 has a length equivalent to two filters 22 with the adsorbing filters 31 located at both ends of the filter plug 37. In this manner, an intermediate product 25 of a double filter cigarette 49 is produced. Subsequently, the intermediate product 25 is so wrapped with the tipping paper 15 having adhesive on the surface thereof as to be formed into the double filter cigarette 49.
  • the filter attaching apparatus 14 is provided with a conveyance path 39 defined by a first conveyance drum 38 and a second conveyance drum 23. More specifically, the conveyance path 39 for the intermediate product 25 is provided by rotation of the first conveyance drum 38 in a direction indicated by an arrow R1, and rotation of the second conveyance drum 23 in a direction indicated by an arrow R2.
  • the conveyance path 39 is a path for conveying the intermediate products 25.
  • the first conveyance drum 38 defines an upstream part of the conveyance path 39, and the second conveyance drum 23 defines a downstream part of the path 39.
  • the first conveyance drum 38 is also referred to as a swash plate drum.
  • the second conveyance drum 23 is also referred to as a rolling drum.
  • Each of the first conveyance drum 38 and the second conveyance drum 23 has a plurality of suction grooves (not shown) for sucking the intermediate products 25 in a manner as to partially accommodate the intermediate products 25 in the suction grooves.
  • the intermediate products 25 are conveyed one by one with each intermediate product 25 being accommodated in each suction groove, along the peripheral direction of the first conveyance drum 38 and the second conveyance drum 23.
  • a feed drum 40 rotating in a direction indicated by an arrow R3 is disposed adjacent to the first conveyance drum 38.
  • the tipping paper 15 is distributed from the feed drum 40, and the leading edge of the tipping paper 15 adheres to the intermediate product 25 conveyed along the first conveyance drum 38.
  • a guide member 24 is disposed adjacent to the second conveyance drum 23 along the peripheral direction of the second conveyance drum 23. The guide member 24 rolls each intermediate product 25 together with the second conveyance drum 23 in a manner as to wrap the intermediate product 25 with the tipping paper 15.
  • the filter attaching step (step S4) will be described as an example of the post-treatment step to actually wrap each intermediate product 25 with the tipping paper 15 by using the filter attaching apparatus 14 having the above structure.
  • Each double cigarette DS produced to have a length equivalent to two cigarettes by a conventional means is cut into two cigarettes 16 during conveyance of the double cigarette DS (arrow F1 in FIG. 6 ).
  • the two cigarettes 16 are separated in the axial direction thereof into respective cigarette rows (arrows F2 in FIG. 6 ).
  • the cigarette rows are fed to the first conveyance drum 38 (arrows F3 in FIG. 6 ).
  • the aforementioned filter plugs 37 are subjected to a grading processing in the conveyance direction, and then are aligned into one row; and subsequently, they are fed via an accelerating drum 41 rotating in a direction indicated by an arrow R4 to the first conveyance drum (swash plate drum) 38.
  • the cigarette rows are fed to the first conveyance drum 38 while retaining the distace.
  • the first conveyance drum 38 is provided with a pair of floating discs (not shown) at both sides thereof, and the two cigarette 16 are moved by the floating discs in the axial direction thereof to reduce distance between the two cigarettes 16 with the rotation of the first conveyance drum 38 being progressed. In this way, the intermediate product 25 of the double filter cigarette including the filter plug 37 disposed between the two cigarettes 16 is produced.
  • a web W of the tipping paper is fed out from a roll of the tipping paper not shown in the drawing (in a direction indicated by arrows E in FIG. 6 ).
  • the web W is led to the feed drum (coke drum) 40.
  • Adhesive glue
  • Adhesive is applied on one surface of the web W upstream of the feed drum 40.
  • an adhesive roller 42 is disposed upstream of the feed drum 40, and this adhesive roller 42 rotates with its half lower portion dipped in an adhesive solution 43.
  • a transfer roller 44 is adjacently disposed above the adhesive roller 42, and the adhesive applied on an outer peripheral surface of the adhesive roller 42 is transferred to an outer peripheral surface of the transfer roller 44 at a predetermined thickness.
  • the transfer roller 44 rotatably contacts the above one surface of the web W when the web W passes through the transfer roller 44, thereby applying the adhesive to the web W in accordance with a predetermined application pattern.
  • the feed drum 40 has a suction surface around its outer periphery, and rotates while holding the web W on the suction surface.
  • a cutter drum 45 is disposed adjacent to the feed drum 40.
  • the cutter drum 45 has a number of coke knives (not shown) on its outer periphery. These coke knives are arranged at regular intervals, and revolute synchronically with the feed drum 40 while the cutter drum 45 rotates.
  • the web W is cut into each tipping paper 15 on the suction surface of the feed drum 40 with these rotating coke knives.
  • each tipping paper 15 moves to be supplied to each intermediate product 25 on the first conveyance drum 38.
  • a gap between the feed drum 40 and the first conveyance drum 38 is defined as a pasting passage 46.
  • a leading edge of the tipping paper 15 adheres to an outer surface of the intermediate product 25, and then is conveyed together with the intermediate product 25 on the first conveyance drum 38.
  • Each intermediate product 25 with the tipping paper 15 adhering thereon is transferred from the first conveyance drum 38 to the second conveyance drum (rolling drum) 23.
  • a gap between the first conveyance drum 38 and the second conveyance drum 23 is defined as a delivery passage 47.
  • the intermediate products 25 are conveyed between the second conveyance drum 23 and the guide member 24 while the second conveyance drum 23 rotates.
  • the guide member 24 extends along the rotational direction of the second conveyance drum 23.
  • a rolling passage 26 for the intermediate products 25 is defined between the outer periphery of the second conveyance drum 23 and the guide member 24, and the rolling passage 26 is curved along the outer periphery of the second conveyance drum 23.
  • the conveyance path 39 includes a narrower section 48 (the pasting passage 46, the delivery passage 47, and the rolling passage 26, for example) that has a width narrower than the filter plug 37 conveyed as a part of the intermediate product 25, that is, the diameter of the hollow filter 11, and greater than the diameter of the core 11a.
  • the tipping paper 15 should be pasted to the intermediate product 25 while pressing the intermediate product 25 in the radial direction to some extent in the pasting passage 46; and the intermediate product 25 is sucked onto the drums 38, 23 through air suction, and thus the intermediate product 25 should be pressed in the radial direction to some extent in the delivery passage 47 in order to be securely delivered while preventing air leakage.
  • the intermediate product 25 should also be rotatably pressed in the radial direction to some extent in the rolling passage 26 so as to be securely wrapped with the tipping paper 15.
  • the conveyance path 39 requires the narrower section 48 for some purpose.
  • a projection 29 projecting into the rolling passage 26 for the sake of triggering off the rolling of the intermediate product 25.
  • the intermediate product 25 is wrapped with the tipping paper 15 adhering thereto to be formed into the double filter cigarette 49 with the hollow filter 11.
  • Each filter cigarette 27 with the hollow filter 11 includes the filter 22 having the hollow filter 11 disposed at the mouthpiece end of the filter 22, as shown in FIG. 4 .
  • the adsorbing filter 31 is continuously connected to the hollow filter 11 in the longitudinal direction of the hollow filter 11.
  • the hollow filter 11 and the adsorbing filter 31 are each wrapped with the wrapping paper 30.
  • the hollow filter 11 and the adsorbing filter 31 are further integrally wrapped with the forming paper 32 into one.
  • the cigarette 16 is formed by wrapping cut tobacco 33 with cigarette paper 34. As aforementioned, the filter 22 and the cigarette 16 are integrally connected to each other through the tipping paper 15.
  • the core 11a has a hardness of 0 mm/10 to 5 mm/10, and the sheath 11b has a hardness of 5 mm/10 to 10 mm/10. This means that the core 11a has a greater hardness, and the sheath 11b has a smaller hardness.
  • the core 11a has a diameter smaller than the width of the narrower section.
  • the post-treatment step is the filter attaching step using the filter attaching apparatus 14.
  • the rolling passage 26 has an especially narrow width at a section where the projection 29 at the inlet of the rolling passage 26 is provided, and the diameter of the core 11a is further narrower than the width of the section in the conveyance passage where the projection 29 is disposed.
  • the core 11a and the sheath 11b are configured to have different total finenesses and additive rates of the plasticizer from each other such that the core 11a becomes harder, and the sheath 11b becomes softer; therefore, even if the sheath 11b is squeezed when passing through the above narrower section 48, the sheath 11b absorbs an external pressure in a manner as to reduce the pressure to be applied onto the core 11a. Accordingly, it is possible to reduce deformation in shape of the through hole 10.
  • at least the core 11a has a smaller diameter than the width of the narrower section 48, which prevents the through hole 10 from being directly squeezed. For example, as shown in FIG.
  • the present structure blocks an external pressure at the boundary line 21, thereby effectively preventing the core 11a from the external pressure, which facilitates production of the filters having the same quality.
  • An excessively great amount of the plasticizer added to the core 11a may cause a sharp smell of the plasticizer.
  • An excessively small amount of the plasticizer may hinder satisfactory formation, so that fuzz is likely to be caused on the surface of the through hole, which makes it hard to retain the shape of the through hole.
  • An excessively small total fineness is likely to cause a factor of hole defects or the like when the fibers are formed into the core 11a.
  • An excessively great total fineness makes it hard to insert the fibers into the first hole forming tube 17, which hinders uniform application of the plasticizer.
  • the core 11a becomes harder as the values of the additive rate of the plasticizer and the total fineness become greater, and the core 11a becomes softer as the values of the additive rate of the plasticizer and the total fineness become smaller.
  • the core forming fibers 4 used for forming the core 11a to have a total fineness of 23000 denier to 70000 denier, further preferably 26000 denier to 60000 denier, and most preferably 30000 denier to 50000 denier, and to make the core forming fibers 4 to have an additive rate of the plasticizer of 13% to 40%, further preferably 15% to 35%, and most preferably 17% to 30%.
  • an excessively great amount of the plasticizer added to the sheath 11b may cause a sharp smell of the plasticizer.
  • An excessively small total fineness is likely to result in a smaller diameter of the hollow filter 11 than a desired value when the sheath 11b are formed.
  • An excessively great total fineness is likely to result in a greater diameter of the hollow filter 11 than a desired value.
  • the core 11a becomes harder as the values of the additive rate of the plasticizer and the total fineness become greater, and the core 11a becomes softer as the values of the additive rate of the plasticizer and the total fineness become smaller.
  • Excessive softness of the sheath 11b makes it hard to retain the position of the core at a desired position, which is likely to cause fuzz on a cut surface thereof. Excessive hardness of the sheath 11b hinders sufficient absorption of the external pressure during passing through the conveyance passage having a narrower width, and makes the filter surface excessively hard when the sheath 11b is formed into the filter 22, which results in unfavorable feeling of the filter when a user holds the filter in his or her mouth.
  • the core forming fibers 4 used for forming the sheath 11b to have a total fineness of 10000 denier to 47000 denier, further preferably 10000 denier to 40000 denier, and most preferably 12000 denier to 30000 denier, and to make the sheath 11b to have an additive rate of the plasticizer of 0% to 15%, further preferably 3% to 12%, and most preferably 6% to 9%.
  • the through hole 10 and the core 11a have circular cross sections, both of which are defined by concentric circles around the axis of the hollow filter 11.
  • the center of the through hole 10 may deviate from the axis of the hollow filter 11.
  • the through hole 10 may have a cross section in a star shape as shown in FIG. 10 .
  • various shapes, such as a cross shape and a heart shape may also be used although not shown in the drawing.
  • the core 11a may have a rectangular cross section.
  • any polygon, such as a triangle may also be used although not shown in the drawing.
  • the through hole 10 has been exemplified as a hole formed in the core 11a with reference to FIG. 3 , but the hole formed in the core 11a may not always be a through hole as far as the hole extends from one end surface toward the other end surface thereof.
  • the hole formed in the core 11a may not always be a through hole as far as the hole extends from one end surface toward the other end surface thereof.
  • FIG. 12 in the case of cutting the hollow filter 11 at a cutting line C, there may be formed holes 35 extending from one end surface of the hollow filter 11 to the half way of the other end surface. In the hollow filter 11 including the hole 35, it is also possible to prevent crush, deformation or the like of the hole 35.
  • the hole 35 may be formed by introducing the core forming fibers 4 into the hole forming tube through insertion and pull-out of the mandrel 19 in the hole forming device 9.
  • a pressurizing test was conducted on the hollow filter 11 shown in FIG. 3 as an example, and on a conventional filter including a through hole without the core 11a and the sheath 11b as a comparative.
  • the pressurizing test was carried out on tree hollow filters 11: Sample 1 to Sample 3 as the example, and tree filters: Sample 4 to Sample 6 as the comparative.
  • each core was set to have a single fiber fineness of 4.0 denier, the total fineness of 40000 denier, and the additive rate of the plasticizer of 17%.
  • Each sheath was set to have a single fiber fineness of 8.0 denier, a total fineness of 15000 denier, and an additive rate of the plasticizer of 6%.
  • each of Samples 4 to 6 of the comparative only fibers were used that had a single fiber fineness of 5.0, a total fineness of 47000 denier, and an additive rate of the plasticizer of 19%.
  • Cellulose acetate fibers were used for each core of the example, each sheath of the example, and the comparative.
  • Each hardness of the cores and the sheaths of Sample 1 to Sample 3, and each hardness of Sample 4 to Sample 6 are as shown in FIG. 15 .
  • Each sheath of Sample 1 to Sample 6 was wrapped with wrapping paper having air permeability of 10000 CORESTA units, and a basis weight of 24.0 g/m 2 .
  • hardness denotes hardness defined by the following method.
  • Cylindrical filters each having a length of 112 mm and an approximately constant diameter along its entire length were prepared as filters for measurement M.
  • each filter for measurement M was placed on a stage 56 as shown in FIG. 13 , and a pressing member 53 having a diameter of 15 mm was brought into contact with the filter for measurement M from above the filter for measurement M so as to pressurize the filter for measurement M at a weight of 300 g for 10 seconds (in a direction indicated by an arrow L in FIG. 13 ).
  • Hardness (mm/10) is defined by the following formula, where h1(mm) denotes a distance between an upper surface of the stage 56 and a pressing surface of the pressing member 53 when the pressing member 53 was brought into contact with the filter for measurement without applying the weight of 300 g; and h2 (mm) denotes a distance between the upper surface of the stage 56 and the pressing surface of the pressing member 53 when the filter for measurement was pressurized for 10 seconds.
  • Hardness mm / 10 h 1 ⁇ h 2 ⁇ 10
  • each hollow filter including a sheath and a core In measurement of the hardness of each hollow filter including a sheath and a core , the hardness of each sheath was measured by using filters each having the core , the sheath, and wrapping paper as the filters for measurement M (the wrapping paper, and the boundary line between the core and the sheath are not shown); the hardness of each core was measured by using filters each including only a core as the filters for measurement M.
  • each hollow filter 11 (the wrapping paper 30 is omitted in the drawing) of Sample 1 to Sample 3, which had a diameter of approximately 7.6 mm, a core diameter of approximately 5.0 mm, and a length of approximately 84 mm, was held between two metal plates 52, and the hollow filter 11 was pressurized until a distance between the two metal plates 52 became 6.0 mm.
  • respective shapes of a through hole of each filter before the pressurizing, during the pressurizing, and after the pressurizing (immediately after the pressurizing) were photographed for the purpose of measuring a distortion rate of a hole diameter in each filter.
  • a longer diameter having a longer length was defined as A
  • a shorter diameter having a shorter length was defined as B
  • the distortion rate (A/B) was calculated.
  • An average value of this rate was also calculated for each sample. A smaller distortion rate indicates that the shape of the through hole is better retained against an external pressure.
  • the same pressurizing test was conducted in the same manner on Sample 4 to Sample 6 that are the filters of the comparative.
  • the results were such that the average value of the distortion rate before the pressurizing was 1.02 in each Sample of the example and the comparative.
  • the average value of the distortion rate during the pressurizing was 1.22 in the example, and 2.07 in the comparative, which indicates that the shape of the through hole was better retained in the example than that in the comparative.
  • the average value of the distortion rate after the pressurizing was 1.03 in the example, and 1.29 in the comparative , which also indicates that the shape of the through hole was better retained in the example.

Landscapes

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

Claims (6)

  1. Filtre creux cylindrique (11) incluant un trou (10) s'étendant d'une surface d'extrémité vers l'autre surface d'extrémité, dans lequel
    le filtre creux (11) inclut en outre un noyau (11a) présentant le trou (10) s'étendant d'une surface d'extrémité vers l'autre surface d'extrémité et une enveloppe (11b) recouvrant un extérieur du noyau (11a),
    une ligne de délimitation (21) se trouve entre le noyau (11a) et l'enveloppe (11b),
    le noyau (11a) comprend une fibre de formation de noyau (4),
    et l'enveloppe (11b) comprend une fibre de formation de noyau (5) ;
    caractérisé en ce que
    le noyau (11a) présente une finesse totale de 23 000 deniers à 70 000 deniers, un taux additif d'un plastifiant de 13 % à 40 %, et
    l'enveloppe (11b) présente une finesse totale de 10 000 deniers à 47 000 deniers, un taux d'additif du plastifiant de 0 % à 15 %.
  2. Filtre creux (11) selon la revendication 1, dans lequel
    l'enveloppe (11b) présente une dureté inférieure à celle du noyau (11a).
  3. Filtre creux (11) selon la revendication 2, dans lequel
    le noyau (11a) présente une dureté supérieure ou égale à 0 mm/10 et inférieure à 5 mm/10, et
    l'enveloppe (11b) présente une dureté supérieure ou égale à 5 mm/10 et inférieure ou égale à 10 mm/10.
  4. Filtre (22) comprenant :
    le filtre creux (11) selon l'une quelconque des revendications 1-3 ; et
    un filtre adsorbant (31) relié continuellement au filtre creux (11) suivant une direction longitudinale.
  5. Cigarette à filtre (27) comprenant :
    le filtre creux (11) selon l'une quelconque des revendications 1-3 ;
    une cigarette (16) formée en emballant du tabac haché (33) avec du papier à cigarette (34) ; et
    papier pour embout utilisé pour emballer le filtre creux (11) et la cigarette (16) d'une manière permettant de relier le filtre creux (11) et la cigarette (16) suivant une direction longitudinale.
  6. Cigarette à filtre (27) comprenant :
    le filtre (22) selon la revendication 4 ;
    une cigarette (16) formée en emballant du tabac haché (33) avec du papier à cigarette (34) ; et
    papier pour embout utilisé pour emballer le filtre (22) et la cigarette (16) d'une manière permettant de relier le filtre (22) et la cigarette (16) suivant une direction longitudinale.
EP17172762.1A 2012-11-26 2012-11-26 Procédé de production de cigarettes à filtre, filtre et cigarette à filtre Active EP3254570B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17172762.1A EP3254570B1 (fr) 2012-11-26 2012-11-26 Procédé de production de cigarettes à filtre, filtre et cigarette à filtre

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12888733.8A EP2893820B1 (fr) 2012-11-26 2012-11-26 Procédé de fabrication d'une cigarette à filtre, filtre, et cigarette à filtre
EP17172762.1A EP3254570B1 (fr) 2012-11-26 2012-11-26 Procédé de production de cigarettes à filtre, filtre et cigarette à filtre
PCT/JP2012/080465 WO2014080516A1 (fr) 2012-11-26 2012-11-26 Procédé de fabrication d'une cigarette à filtre, filtre, et cigarette à filtre

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP12888733.8A Division-Into EP2893820B1 (fr) 2012-11-26 2012-11-26 Procédé de fabrication d'une cigarette à filtre, filtre, et cigarette à filtre
EP12888733.8A Division EP2893820B1 (fr) 2012-11-26 2012-11-26 Procédé de fabrication d'une cigarette à filtre, filtre, et cigarette à filtre

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EP3254570A1 EP3254570A1 (fr) 2017-12-13
EP3254570B1 true EP3254570B1 (fr) 2023-06-21

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EP12888733.8A Active EP2893820B1 (fr) 2012-11-26 2012-11-26 Procédé de fabrication d'une cigarette à filtre, filtre, et cigarette à filtre
EP17172762.1A Active EP3254570B1 (fr) 2012-11-26 2012-11-26 Procédé de production de cigarettes à filtre, filtre et cigarette à filtre

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WO (1) WO2014080516A1 (fr)

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GB201501527D0 (en) * 2015-01-30 2015-03-18 British American Tobacco Co Apparatus and method for filter manufacture
CN107635416A (zh) * 2015-03-13 2018-01-26 日本烟草产业株式会社 烟草产品用过滤嘴及烟草产品
CN104824841B (zh) * 2015-03-21 2018-05-15 南通烟滤嘴有限责任公司 空心滤棒的成型设备
RU2687639C1 (ru) * 2015-10-21 2019-05-15 Джапан Тобакко Инк. Фильтр для табачных изделий
KR20180100045A (ko) * 2015-12-30 2018-09-06 필립모리스 프로덕츠 에스.에이. 필터 제조 장치
GB201608928D0 (en) * 2016-05-20 2016-07-06 British American Tobacco Co Article for use in apparatus for heating smokable material
GB201608931D0 (en) * 2016-05-20 2016-07-06 British American Tobacco Co Article for use in apparatus for heating smokeable material
IT201600075162A1 (it) * 2016-07-18 2018-01-18 Montrade S P A Bacchetta filtro per articoli da fumo, metodo per la sua fabbricazione e filtro ottenuto a partire da tale bacchetta filtro
KR102022302B1 (ko) * 2016-10-25 2019-11-04 태영산업 주식회사 담배용 필터의 제조장치
EP3586652B9 (fr) 2017-03-06 2023-03-01 Japan Tobacco, Inc. Article à fumer pourvu d'un filtre
RU2760355C2 (ru) * 2017-06-15 2021-11-24 Филип Моррис Продактс С.А. Способ и устройство для изготовления индукционно нагреваемых стержней, образующих аэрозоль
WO2019106038A1 (fr) * 2017-11-28 2019-06-06 Philip Morris Products S.A. Article de génération d'aérosol doté d'une cavité d'extrémité buccale améliorée
GB201721741D0 (en) 2017-12-22 2018-02-07 Essentra Filter Products Dev Co Pte Ltd Smoking article mouthpiece
KR20200136392A (ko) 2018-03-26 2020-12-07 필립모리스 프로덕츠 에스.에이. 복합 다공성 지지 요소를 갖는 흡입기
KR101978974B1 (ko) * 2018-08-23 2019-08-28 태영산업 주식회사 담배용 베이스지관 및 그의 제조방법
GB201817582D0 (en) * 2018-10-29 2018-12-12 Nerudia Ltd Smoking and consumable
GB201817537D0 (en) * 2018-10-29 2018-12-12 Nerudia Ltd Smoking substitute consumable
GB201903282D0 (en) * 2019-03-11 2019-04-24 Nicoventures Trading Ltd An article for use in a non-combustable aerosol provision
GB201903281D0 (en) * 2019-03-11 2019-04-24 Nicoventures Trading Ltd An article for use in a non-combustible aerosol provision system
GB201919069D0 (en) * 2019-12-20 2020-02-05 Nicoventures Trading Ltd Component for use in an aerosol provision system
CN113712253B (zh) * 2021-08-31 2024-09-17 南通烟滤嘴有限责任公司 一种内芯悬空滤棒及其制备装置与方法
CN114983017B (zh) * 2022-05-24 2023-08-22 云南中烟工业有限责任公司 一种内芯填充的外中空滤棒及其加工方法
CN115125674B (zh) * 2022-07-22 2023-08-29 广东鑫球新材料科技有限公司 一种内插接式空芯棉模具及成型方法
GB202300835D0 (en) * 2023-01-19 2023-03-08 Nicoventures Trading Ltd Methods and assemblies for the processing of a continuous sheet of material

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EP2893820B1 (fr) 2022-07-20
JPWO2014080516A1 (ja) 2017-01-05
EP2893820A1 (fr) 2015-07-15
EP2893820A4 (fr) 2016-06-01
EP3254570A1 (fr) 2017-12-13
JP5877570B2 (ja) 2016-03-08
WO2014080516A1 (fr) 2014-05-30

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