EP0321740A1 - Coaxial cigarette - Google Patents

Coaxial cigarette Download PDF

Info

Publication number
EP0321740A1
EP0321740A1 EP88119812A EP88119812A EP0321740A1 EP 0321740 A1 EP0321740 A1 EP 0321740A1 EP 88119812 A EP88119812 A EP 88119812A EP 88119812 A EP88119812 A EP 88119812A EP 0321740 A1 EP0321740 A1 EP 0321740A1
Authority
EP
European Patent Office
Prior art keywords
filter
coaxial
cigarette according
covering
inner core
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
EP88119812A
Other languages
German (de)
French (fr)
Other versions
EP0321740B1 (en
Inventor
Horst Borowski
Erwin Dipl.-Chem. Dr. Kausch
Erhard Dipl.-Ing. Dr. Rittershaus
Gert Dipl.-Chem. Dr. Rudolph
Werner Dipl.-Phys. Dr. Schneider
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.)
British American Tobacco Germany GmbH
Original Assignee
British American Tobacco Germany GmbH
BAT Cigarettenfabriken GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British American Tobacco Germany GmbH, BAT Cigarettenfabriken GmbH filed Critical British American Tobacco Germany GmbH
Publication of EP0321740A1 publication Critical patent/EP0321740A1/en
Application granted granted Critical
Publication of EP0321740B1 publication Critical patent/EP0321740B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A24D1/00—Cigars; 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

Definitions

  • the invention relates to a coaxial cigarette of the type specified in the preamble of claim 1.
  • coaxial smokable articles in particular coaxial cigars or cigarettes with an inner core which is surrounded by a jacket made of tobacco material.
  • the basic principle of such a coaxial cigarette is known for example from FR-PS 998 556, the inner core consisting of a tobacco of lower quality, which is surrounded by an annular jacket made of tobacco of high quality. This allows savings to be made in terms of the cost of the tobacco materials used.
  • a coaxial cigarette of the type specified is known from DE-0S 36 02 846 and has an inner core made of a residue-free glowing Material, a covering for the inner core, an outer casing coaxially surrounding the inner core made of a tobacco and / or non-tobacco material, and a casing for the outer casing.
  • the particular advantage of this coaxial cigarette is that it can be manufactured using customary manufacturing techniques on specially modified rod machines.
  • US Pat. No. 3,356,094 shows a coaxial cigarette with an inner hollow tube and an aerosol chamber with a narrow outlet; however, the production of this coaxial cigarette is very complex and therefore expensive; In addition, the different components are separated from each other, so that there is an unusual smoking pattern.
  • the invention has for its object to provide a coaxial cigarette of the type specified, in which the disadvantages mentioned above do not occur.
  • the advantages achieved by the invention are based on the fact that combustion products of the strand part in the ring-shaped outer jacket and separated from the inner core during a train in the train phase are guided axially through the coaxial cigarette and absorbed by a special coaxial filter;
  • This coaxial filter treats the peripheral smoke flowing through its filter jacket and the central smoke flowing through its filter core in very different ways, which are matched to the two types of smoke, so that there is an optimal filter effect.
  • the gas phase of the smoke is reduced by diffusion and ventilation, while the particle phase is reduced by ventilation and is simultaneously absorbed by a high-performance filter segment.
  • Both the tobacco rod and the coaxial filter of this coaxial cigarette can be produced using existing technologies which are known in principle from the prior art, so that only corresponding modifications to the current machines are required.
  • the smoke produced and absorbed by the smoker is acceptable in terms of taste and contains only a little condensate, which is also largely free of the usual combustion products; the smoking process itself is not changed, so that the "smoking experience" for the smoker can also be maintained.
  • the coaxial cigarette which is generally indicated by reference number 10, has a strand part 12, to which a coaxial filter 15 is attached with the usual manufacturing techniques.
  • the strand part 12 contains an inner core 14 with a sheath 16 and an outer core 18 with a sheath 20.
  • the coaxial filter 15 consists of a filter core 22 with a sheath 24 and a filter jacket 26 with a sheath 28.
  • the coaxial filter 15 is ventilated, as will be explained later; the ventilation means is indicated as a line of punctiform ventilation openings 30 which extend over the circumference of the coaxial filter 15.
  • the inner core 14 of the strand part 12 has a diameter of 3 to 5 mm, while the diameter of the outer jacket 18 of the strand part 12 is a maximum of 8 mm, so that this strand part 12 corresponds approximately to the usual diameter of "normal" cigarettes.
  • the inner core 14 consists of a porous carrier substance with a high absorption capacity for the combination of flavoring and / or flavoring substances, also known as "casing", which are generally present in solvents and contain sugar, humectants and similar substances; it is also spoken of “sauce”; this "casing" is added to the tobacco material before cutting.
  • casing a porous carrier substance with a high absorption capacity for the combination of flavoring and / or flavoring substances
  • the absorption capacity for "casing" should be greater than 3% by weight.
  • a preferred carrier is tobacco material, e.g. B. cut tobacco, tobacco foil or extruded tobacco; however, thermally decomposable non-tobacco materials can also be used. It is important that the carrier substance of the inner core 14 burns up largely without residue.
  • the inner core 14 contains tobacco material, it must have a high aroma content and / or a high condensate potential and a low carbon monoxide potential.
  • Cigarette paper is particularly suitable as wrapping 16, and expediently a cigarette paper that consists at least partially of tobacco raw material.
  • the sheath 16 of the inner core 14 can also be produced from tobacco films or other natural material films.
  • the outer jacket 18 of the strand part 12 consists of tobacco materials and / or non-tobacco materials with a low condensate potential and with a high filling capacity with a packing density of at most 220 mg / ml.
  • the inner casing 16 of the inner core 14 and the outer casing 20 of the outer casing 18 of the strand part 12 are treated with generally different glow salts and glow salt concentrations as additives, either uniformly over their entire area or as a glow salt pattern; a specific glow salt or a mixture of several different glow salts can be used in each case.
  • the amount of glow salt for the inner casing 16 or outer casing 20 must be adjusted so that a total glow rate results for the inner core 14 and outer casing 18, which ensures a sufficient uniform mass conversion for the inner core 14 and outer casing 18 of the strand part 12. In particular, it must be ruled out that cavities or similar defects arise due to locally high glow speeds.
  • the tensile resistance of the inner core 14 of the strand part 12 must be lower than the tensile resistance of the outer jacket 18 of the tobacco rod 12.
  • the outer diameter of the coaxial filter 15 corresponds to the outer diameter of the strand part 12, that is, is a maximum of 8 mm.
  • the diameter of the filter core 22 corresponds approximately to the diameter of the inner core 14 of the strand part, but should, according to a preferred embodiment, be approximately 0.1 to 1 mm smaller than this, as indicated in the figure, in order in this way to rule out smoke from the Outer jacket 18 can get into the filter core 22.
  • the coaxial filter 15 is ventilated and has a degree of ventilation of 50 to 80%.
  • a highly porous wrapping and highly porous covering paper with an additional, laser-perforated ventilation zone 30 is used as the outer covering 28, at least through the covering paper. If, as shown, the ventilation zone is formed by a line of punctiform ventilation openings 30 running in the circumferential direction, the line of the openings 30 should have a distance of at least 10 mm from the mouth end of the coaxial filter 15.
  • the length of the coaxial filter 15 should be in the range of 21 to 30 mm. Accordingly, the ventilation zone 30 would be at least 9 mm away from the end face of the coaxial filter 15 facing the strand part 12, the aim being to keep the smallest possible distance from the end face on the mouth side.
  • the cover 28 of the filter jacket 26 is porous and consists of a cover paper and a covering paper.
  • the topping paper should have a porosity of more than 5000 CU and the wrapping paper should have a porosity of more than 10000 CU.
  • Suitable materials for the two filter zones are the customary filter materials as are currently used in the cigarette industry.
  • the filter core 22 can consist of porous carrier materials with a large specific surface area, in particular foamed, extruded, sintered, pressed or molded materials such as, for example, coal, tobacco or non-tobacco materials.
  • the filter jacket 26 again consists of the usual filter materials.
  • the carrier materials for the filter core 22 should contain additives, namely once the usual additives, such as triacetin, flavor or aroma substances and / or largely neutral taste substances with a high transfer coefficient into the core smoke.
  • the filter core 22 is surrounded by an air-impermeable covering 24, which can consist, for example, of non-porous filter paper.
  • the ratio of the specific tensile resistances of the filter jacket 26 to that of the filter core 22 is “measured closed”, that is to say without taking ventilation into account, at least 1.4.
  • the peripheral filter jacket 26, based on the peripheral smoke flow, together with the ventilation via the ventilation openings 30, has a degree of reduction of at least 90%; and the filter core 22 has a filter efficiency of at most 40%, based on the core smoke.
  • combustion products thus arise both in the inner core 14 and in the outer jacket 18 of the strand part 12.
  • the combustion products essentially only come from the outer jacket 18 of the strand part 12, so that almost all of the combustion Products passed on separate paths, passed through the coaxial filter 15 and can be influenced in a targeted manner so that there is little condensate without affecting the taste, which is largely free of the usual combustion products.

Landscapes

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

Abstract

Eine Koaxialcigarette (10) mit einem Innenkern (14) aus einem weitgehend rückstandsfrei verglimmenden Material, insbesondere Tabakmaterial, mit einer Umhüllung (16) für den Innenkern, einem den Innenkern bzw. seine Umhüllung koaxial umgebenden Außenmantel (18) aus einem Tabak- und/oder Nicht-Tabakmaterial, und mit einer Umhüllung (20) für den Außenmantel weist einen ventilierten Koaxialfilter (15) mit einem Filterkern (22), dessen Innendurchmesser etwa dem Durchmesser des Innenkerns entspricht, und mit einem Filtermantel (26) auf; der Filterkern hat eine luftundurchlässige Umhüllung (24); der Filtermantel hat eine luftdurchlässige Umhüllung (28); die Umhüllung des Innenkerns und die Umhüllung des Außenmantels sind mit Glimmsalzen versehen; und der Zugwiderstand des Innenkerns ist niedriger als der Zugwiderstand des Außenmantels.A coaxial cigarette (10) with an inner core (14) made of a largely residue-free smoldering material, in particular tobacco material, with a wrapper (16) for the inner core, an outer jacket (18) coaxially surrounding the inner core or its wrapper, made of a tobacco and / or non-tobacco material, and with a covering (20) for the outer jacket has a ventilated coaxial filter (15) with a filter core (22), the inner diameter of which corresponds approximately to the diameter of the inner core, and with a filter jacket (26); the filter core has an air-impermeable covering (24); the filter jacket has an air-permeable covering (28); the coating of the inner core and the coating of the outer jacket are provided with glow salts; and the tensile resistance of the inner core is lower than the tensile resistance of the outer jacket.

Description

Die Erfindung betrifft eine Koaxialcigarette der im Oberbegriff des An­spruchs 1 angegebenen Gattung.The invention relates to a coaxial cigarette of the type specified in the preamble of claim 1.

Es gibt eine Reihe von Veröffentlichungen über sogenannte "koaxiale rauch­bare Artikel", also insbesondere Koaxial-Cigarren oder -Cigaretten mit einem Innenkern, der durch einen Mantel aus Tabakmaterial umgeben ist. Das Grundprinzip einer solchen Koaxialcigarette ist beispielsweise aus der FR-PS 998 556 bekannt, wobei der Innenkern aus einem Tabak geringerer Qualität besteht, der von einem ringförmigen Mantel aus Tabak hoher Quali­tät umgeben ist. Dadurch lassen sich Einsparungen in Bezug auf die Kosten der verwendeten Tabakmaterialien erzielen.There are a number of publications on so-called "coaxial smokable articles", in particular coaxial cigars or cigarettes with an inner core which is surrounded by a jacket made of tobacco material. The basic principle of such a coaxial cigarette is known for example from FR-PS 998 556, the inner core consisting of a tobacco of lower quality, which is surrounded by an annular jacket made of tobacco of high quality. This allows savings to be made in terms of the cost of the tobacco materials used.

Weitere Ausgestaltungen solcher Koaxialcigaretten gehen aus der FR-PS 13 22 254, der US-PS 3 614 956, der US-PS 4 219 031, der GB-0S 20 70 409 und der GB-PS 10 86 443 hervor.Further refinements of such coaxial cigarettes emerge from FR-PS 13 22 254, US-PS 3 614 956, US-PS 4 219 031, GB-0S 20 70 409 and GB-PS 10 86 443.

Eine Koaxialcigarette der angegebenen Gattung ist aus der DE-0S 36 02 846 bekannt und weist einen Innenkern aus einem rückstandsfrei verglimmenden Material, eine Umhüllung für den Innenkern, einen den Innenkern koaxial um­gebenden Außenmantel aus einem Tabak- und/oder Nichttabakmaterial, sowie eine Umhüllung für den Außenmantel auf. Der besondere Vorteil dieser Ko­axialcigarette liegt darin, daß sie mit den üblichen Fertigungstechniken auf speziell modifizierten Strangmaschinen hergestellt werden kann.A coaxial cigarette of the type specified is known from DE-0S 36 02 846 and has an inner core made of a residue-free glowing Material, a covering for the inner core, an outer casing coaxially surrounding the inner core made of a tobacco and / or non-tobacco material, and a casing for the outer casing. The particular advantage of this coaxial cigarette is that it can be manufactured using customary manufacturing techniques on specially modified rod machines.

Nachteilig ist jedoch, daß bei dieser Koaxialcigarette kein Filter vor­gesehen ist, um die unerwünschten Rauchbestandteile abzufangen.It is disadvantageous, however, that no filter is provided in this coaxial cigarette in order to intercept the undesirable smoke components.

Schließlich geht noch aus der US-PS 3 356 094 eine Koaxialcigarette mit einem inneren Hohlrohr und einer Aerosol-Kammer mit engem Außlaß hervor; die Herstellung dieser Koaxialcigarette ist jedoch sehr aufwendig und damit kostspielig; außerdem werden die verschiedenen Bestandteile voneinander getrennt, so daß sich ein ungewöhnliches Rauchmuster ergibt.Finally, US Pat. No. 3,356,094 shows a coaxial cigarette with an inner hollow tube and an aerosol chamber with a narrow outlet; however, the production of this coaxial cigarette is very complex and therefore expensive; In addition, the different components are separated from each other, so that there is an unusual smoking pattern.

Der Erfindung liegt die Aufgabe zugrunde, eine Koaxialcigarette der angege­benen Gattung zu schaffen, bei der die oben erwähnten Nachteile nicht auf­treten.The invention has for its object to provide a coaxial cigarette of the type specified, in which the disadvantages mentioned above do not occur.

Insbesondere soll eine Koaxialcigarette vorgeschlagen werden, bei der die unerwünschten Rauchbestandteile nahezu vollständig abgefangen werden können.In particular, a coaxial cigarette is to be proposed in which the unwanted smoke components can be almost completely intercepted.

Dies wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale erreicht.This is achieved according to the invention by the features specified in the characterizing part of claim 1.

Zweckmäßige Ausführungsformen werden durch die Merkmale der Unteransprüche definiert.Appropriate embodiments are defined by the features of the subclaims.

Die mit der Erfindung erzielten Vorteile beruhen darauf, daß während eines Zuges in der Zugphase entstehende Verbrennungsprodukte des Strangteils im ringförmigen Außenmantel und getrennt vom Innenkern axial durch die Ko­axialcigarette geführt und durch einen speziellen Koaxialfilter absorbiert werden; dieser Koaxialfilter behandelt den peripheren, seinen Filtermantel durchströmenden Rauch und den zentralen, seinen Filterkern durchströmenden Rauch in sehr unterschiedlicher, auf die beiden Raucharten abgestimmten Weise, so daß sich eine optimale Filterwirkung ergibt.The advantages achieved by the invention are based on the fact that combustion products of the strand part in the ring-shaped outer jacket and separated from the inner core during a train in the train phase are guided axially through the coaxial cigarette and absorbed by a special coaxial filter; This coaxial filter treats the peripheral smoke flowing through its filter jacket and the central smoke flowing through its filter core in very different ways, which are matched to the two types of smoke, so that there is an optimal filter effect.

Dabei wird speziell die Gasphase des Rauches durch Diffusion und Ventila­tion reduziert, während die Partikelphase durch Ventilation reduziert und gleichzeitig durch ein Hochleistungsfiltersegment absorbiert wird.Specifically, the gas phase of the smoke is reduced by diffusion and ventilation, while the particle phase is reduced by ventilation and is simultaneously absorbed by a high-performance filter segment.

Sowohl der Tabakstrang als auch der Koaxialfilter dieser Koaxialcigarette können mit vorhandenen und aus dem Stand der Technik im Prinzip bekannten Technologien hergestellt werden, so daß nur entsprechende Modifikationen an den derzeitigen Maschinen erforderlich sind.Both the tobacco rod and the coaxial filter of this coaxial cigarette can be produced using existing technologies which are known in principle from the prior art, so that only corresponding modifications to the current machines are required.

Der entstehende und von dem Raucher aufgenommene Rauch ist geschmacklich akzeptabel und enthält nur wenig Kondensat, das zudem weitgehend frei von den sonst üblichen Verbrennungsprodukten ist; der Rauchvorgang selbst wird nicht verändert, so daß auch das "Raucherlebnis" für den Raucher beibehal­ten werden kann.The smoke produced and absorbed by the smoker is acceptable in terms of taste and contains only a little condensate, which is also largely free of the usual combustion products; the smoking process itself is not changed, so that the "smoking experience" for the smoker can also be maintained.

Dabei wird die Tatsache ausgenutzt, daß während der Zugphase die Verbren­nungsprodukte im wesentlichen nur aus der Peripherie, also dem Mantel­bereich einer Cigarette stammen, so daß man hier gezielt entsprechende Maßnahmen einleiten kann, um die unerwünschten Rauchprodukte abzufangen. Außerdem kann nun konsequent ein optimierter Tabakstrang mit einem opti­mierten Zweistrom-Filter kombiniert werden, um den gewünschten Geschmack in Verbindung mit der weitgehenden Reduzierung der unerwünschten Rauchbestand­teile zu erzielen.This takes advantage of the fact that during the pull phase, the combustion products essentially only come from the periphery, that is to say the jacket area of a cigarette, so that appropriate measures can be taken to intercept the unwanted smoke products. In addition, an optimized tobacco rod can now be consistently combined with an optimized two-flow filter in order to achieve the desired taste in connection with the extensive reduction of unwanted smoke components.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Be­zugnahme auf die beiliegende, schematische Zeichnung näher erläutert, deren einzige Figur einen axialen Schnitt durch eine Koaxialcigarette zeigt.The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying schematic drawing, the single figure of which shows an axial section through a coaxial cigarette.

Die allgemein durch das Bezugszeichen 10 angedeutete Koaxialcigarette weist einen Strangteil 12 auf, an den mit den üblichen Fertigungstechniken ein Koaxialfilter 15 angesetzt ist. Der Strangteil 12 enthält einen Innenkern 14 mit einer Umhüllung 16 sowie einen Außenkern 18 mit einer Umhüllung 20.The coaxial cigarette, which is generally indicated by reference number 10, has a strand part 12, to which a coaxial filter 15 is attached with the usual manufacturing techniques. The strand part 12 contains an inner core 14 with a sheath 16 and an outer core 18 with a sheath 20.

In ähnlicher Weise besteht der Koaxialfilter 15 aus einem Filterkern 22 mit einer Umhüllung 24 und einem Filtermantel 26 mit einer Umhüllung 28.Similarly, the coaxial filter 15 consists of a filter core 22 with a sheath 24 and a filter jacket 26 with a sheath 28.

Der Koaxialfilter 15 ist ventiliert, wie noch erläutert werden soll; das Ventilationsmittel ist als Linie von punktförmigen Ventilationsöffnungen 30 angedeutet, die sich über den Umfang des Koaxialfilters 15 erstrecken.The coaxial filter 15 is ventilated, as will be explained later; the ventilation means is indicated as a line of punctiform ventilation openings 30 which extend over the circumference of the coaxial filter 15.

Der Innenkern 14 des Strangteils 12 hat einen Durchmesser von 3 bis 5 mm, während der Durchmesser des Außenmantels 18 des Strangteils 12 maximal 8 mm beträgt, so daß dieser Strangteil 12 etwa dem üblichen Durchmesser "nor­maler" Cigaretten entspricht.The inner core 14 of the strand part 12 has a diameter of 3 to 5 mm, while the diameter of the outer jacket 18 of the strand part 12 is a maximum of 8 mm, so that this strand part 12 corresponds approximately to the usual diameter of "normal" cigarettes.

Der Innenkern 14 besteht aus einer porösen Trägersubstanz mit hoher Auf­nahmefähigkeit für die auch als "Casing" bezeichnete Kombination von Aroma- und/oder Flavour-Stoffen, die im allgemeinen in Lösungsmitteln vorliegen und Zucker, Feuchthaltemittel und ähnliche Substanzen enthalten; es wird auch von "soßieren" gesprochen; dieses "Casing" wird dem Tabakmaterial vor dem Schneiden zugesetzt.The inner core 14 consists of a porous carrier substance with a high absorption capacity for the combination of flavoring and / or flavoring substances, also known as "casing", which are generally present in solvents and contain sugar, humectants and similar substances; it is also spoken of "sauce"; this "casing" is added to the tobacco material before cutting.

Bezogen auf die Trägersubstanz soll die Aufnahmefähigkeit für "Casing" größer als 3 Gew.-%-Zugabe sein.Based on the carrier substance, the absorption capacity for "casing" should be greater than 3% by weight.

Eine bevorzugte Trägersubstanz ist Tabakmaterial, z. B. Schnittabak, Tabak­folie oder extrudierter Tabak; es kommen aber auch thermisch zersetzbare Nicht-Tabakmaterialien in Frage. Wichtig ist, daß die Trägersubstanz des Innenkerns 14 weitgehend rückstandsfrei verglimmt.A preferred carrier is tobacco material, e.g. B. cut tobacco, tobacco foil or extruded tobacco; however, thermally decomposable non-tobacco materials can also be used. It is important that the carrier substance of the inner core 14 burns up largely without residue.

Die entstehenden Rückstände sollten winzig sein; es besteht deshalb die Möglichkeit, der Trägersubstanz des Innenkerns 14 Glasfasern oder andere Mineral-Fasern zuzusetzen, um hier bereits eine gewisse Filterwirkung zu erzeugen.The residues that arise should be tiny; there is therefore the possibility of adding glass fibers or other mineral fibers to the carrier substance of the inner core 14 in order to already produce a certain filter effect here.

Falls der Innenkern 14 Tabakmaterial enthält, muß dieses einen hohen Aroma­gehalt und/oder ein hohes Kondensatpotential sowie ein niedriges Kohlen­monoxid-Potential haben.If the inner core 14 contains tobacco material, it must have a high aroma content and / or a high condensate potential and a low carbon monoxide potential.

Die Umhüllung 16 des Innenkerns 14 des Strangteils 12 hat eine vergleichs­weise geringe Porösität. Als Umhüllung 16 kommt insbesondere Cigaretten­papier in Frage, und zwar zweckmäßigerweise ein Cigarettenpapier, das zumindest teilweise aus Tabakrohstoff besteht.The sheath 16 of the inner core 14 of the strand part 12 has a comparatively low porosity. Cigarette paper is particularly suitable as wrapping 16, and expediently a cigarette paper that consists at least partially of tobacco raw material.

Als Alternative kann die Umhüllung 16 des Innenkerns 14 auch aus Tabak­folien oder anderen Naturstoff-Folien hergestellt werden.As an alternative, the sheath 16 of the inner core 14 can also be produced from tobacco films or other natural material films.

Der Außenmantel 18 des Strangteils 12 besteht aus Tabakmaterialien und/oder Nicht-Tabakmaterialien mit niedrigem Kondensatpotential und mit hoher Füll­fähigkeit mit einer Packungsdichte von höchstens 220 mg/ml.The outer jacket 18 of the strand part 12 consists of tobacco materials and / or non-tobacco materials with a low condensate potential and with a high filling capacity with a packing density of at most 220 mg / ml.

Als äußere Umhüllung 20 des Außenmantels 18 wird poröses Cigarettenpapier mit einer Luftdurchlässigkeit eingesetzt, die größer als 30 CU (Coresta Units = cm³/min x cm² x 100 mm WS) ist.As an outer coating 20 of the outer shell 18 porous cigarette paper is used with an air permeability that is greater than 30 CU (C Oresta U nits = cc / min x cm² x 100 mm WS).

Wichtig ist, daß die innere Umhüllung 16 des Innenkerns 14 und die äußere Umhüllung 20 des Außenmantels 18 des Strangteils 12 mit im allgemeinen un­terschiedlichen Glimmsalzen und Glimmsalz-Konzentrationen als Additiven beaufschlagt werden, und zwar entweder gleichmäßig über ihre gesamte Fläche oder als Glimmsalz-Muster; dabei kann jeweils ein bestimmtes Glimmsalz oder ein Gemisch aus mehreren unterschiedlichen Glimmsalzen eingesetzt werden.It is important that the inner casing 16 of the inner core 14 and the outer casing 20 of the outer casing 18 of the strand part 12 are treated with generally different glow salts and glow salt concentrations as additives, either uniformly over their entire area or as a glow salt pattern; a specific glow salt or a mixture of several different glow salts can be used in each case.

Die Glimmsalzmenge für die innere Umhüllung 16 bzw. äußere Umhüllung 20 muß so abgestimmt werden, daß sich insgesamt für Innenkern 14 und Außenmantel 18 eine Glimmgeschwindigkeit ergibt, die einen hinreichenden gleichförmigen Massenumsatz für Innenkern 14 und Außenmantel 18 des Strangteils 12 ge­währleistet. Es muß insbesondere ausgeschlossen werden, daß wegen lokal hoher Glimmgeschwindigkeiten Hohlräume oder ähnliche Defekte entstehen.The amount of glow salt for the inner casing 16 or outer casing 20 must be adjusted so that a total glow rate results for the inner core 14 and outer casing 18, which ensures a sufficient uniform mass conversion for the inner core 14 and outer casing 18 of the strand part 12. In particular, it must be ruled out that cavities or similar defects arise due to locally high glow speeds.

Der Zugwiderstand des Innenkerns 14 des Strangteils 12 muß niedriger als der Zugwiderstand des Außenmantels 18 des Tabakstrangs 12 sein.The tensile resistance of the inner core 14 of the strand part 12 must be lower than the tensile resistance of the outer jacket 18 of the tobacco rod 12.

Der Außendurchmesser des Koaxialfilters 15 entspricht dem Außendurchmesser des Strangteils 12, d. h., beträgt maximal 8 mm.The outer diameter of the coaxial filter 15 corresponds to the outer diameter of the strand part 12, that is, is a maximum of 8 mm.

Der Durchmesser des Filterkerns 22 entspricht etwa dem Durchmesser des Innenkerns 14 des Strangteils, sollte jedoch nach einer bevorzugten Aus­führungsform etwa 0,1 bis 1 mm kleiner als dieser sein, wie in der Figur angedeutet ist, um auf diese Weise auszuschließen, daß Rauch von dem Außen­mantel 18 in den Filterkern 22 gelangen kann.The diameter of the filter core 22 corresponds approximately to the diameter of the inner core 14 of the strand part, but should, according to a preferred embodiment, be approximately 0.1 to 1 mm smaller than this, as indicated in the figure, in order in this way to rule out smoke from the Outer jacket 18 can get into the filter core 22.

Der Koaxialfilter 15 ist ventiliert und hat einen Ventilationsgrad von 50 bis 80 %.The coaxial filter 15 is ventilated and has a degree of ventilation of 50 to 80%.

Zu diesem Zweck wird als äußere Umhüllung 28 ein hochporöses Umhüllungs- und hochporöses Belag-Papier mit zusätzlicher, laser-perforierter Venti­lationszone 30 zumindest durch das Belagpapier eingesetzt. Wird die Ven­tilationszone, wie dargestellt, durch eine in Umfangsrichtung verlaufende Linie von punktförmigen Ventilationsöffnungen 30 gebildet, so sollte die Linie der Öffnungen 30 einen Abstand von mindestens 10 mm vom mundseitigen Ende des Koaxialfilters 15 haben.For this purpose, a highly porous wrapping and highly porous covering paper with an additional, laser-perforated ventilation zone 30 is used as the outer covering 28, at least through the covering paper. If, as shown, the ventilation zone is formed by a line of punctiform ventilation openings 30 running in the circumferential direction, the line of the openings 30 should have a distance of at least 10 mm from the mouth end of the coaxial filter 15.

Die Länge des Koaxialfilters 15 sollte im Bereich von 21 bis 30 mm liegen. Dementsprechend wäre die Ventilationszone 30 mindestens 9 mm von der dem Strangteil 12 zugewandten Stirnfläche des Koaxialfilters 15 entfernt, wobei angestrebt wird, einen möglichst kleinen Abstand zur mundseitigen Stirn­fläche einzuhalten.The length of the coaxial filter 15 should be in the range of 21 to 30 mm. Accordingly, the ventilation zone 30 would be at least 9 mm away from the end face of the coaxial filter 15 facing the strand part 12, the aim being to keep the smallest possible distance from the end face on the mouth side.

Wenn der Abstand zwischen der mundseitigen Stirnfläche des Koaxialfilters 15 und der Ventilations-Zone 30 mit l₁, die Breite der Ventilationszone 30 mit Δl, die Länge des Koaxialfilters 15 mit lF und der Abstand zwi­schen der Ventilationszone 30 und der dem Strangteil 12 zugewandten Stirn­fläche des Koaxialfilters 15 mit l₂ bezeichnet werden, dann gilt
lF - l₂ = l₁ + Δl.If the distance between the mouth end face of the coaxial filter 15 and the ventilation zone 30 with l₁, the width of the ventilation zone 30 with Δl, the length of the coaxial filter 15 with l F and the distance between the ventilation zone 30 and the end face 12 of the strand part 12 Coaxial filter 15 are designated with l₂, then applies
l F - l₂ = l₁ + Δl.

Wie erwähnt, ist die Umhüllung 28 des Filtermantels 26 porös und besteht aus einem Umhüllungs- und einem Belagpapier. Das Belagpapier sollte eine Porösität von mehr als 5000 CU und das Umhüllungspapier eine Porösität von mehr als 10000 CU haben.As mentioned, the cover 28 of the filter jacket 26 is porous and consists of a cover paper and a covering paper. The topping paper should have a porosity of more than 5000 CU and the wrapping paper should have a porosity of more than 10000 CU.

Als Materialien für die beiden Filterzonen, nämlich für den Filterkern 22 und den Filtermantel 26, kommen die üblichen Filtermaterialien in Frage, wie sie derzeit in der Cigarettenindustrie eingesetzt werden.Suitable materials for the two filter zones, namely for the filter core 22 and the filter jacket 26, are the customary filter materials as are currently used in the cigarette industry.

Als Alternative hierzu kann der Filterkern 22 aus porösen Trägermateria­lien mit großer spezifischer Oberfläche bestehen, insbesondere geschäumten, extrudierten, gesinterten, gepreßten oder geformten Materialien wie bei­spielsweise Kohle, Tabak- oder Nicht-Tabakmaterialien. Bei dieser Variante besteht der Filtermantel 26 wieder aus den üblichen Filtermaterialien.As an alternative to this, the filter core 22 can consist of porous carrier materials with a large specific surface area, in particular foamed, extruded, sintered, pressed or molded materials such as, for example, coal, tobacco or non-tobacco materials. In this variant, the filter jacket 26 again consists of the usual filter materials.

Bei beiden Varianten sollten die Trägermaterialien für den Filterkern 22 Additive enthalten, nämlich einmal die üblichen Additive, wie beispiels­weise Triacetin, Flavour- bzw. Aroma-Stoffe und/oder geschmacklich weit­gehend neutrale Stoffe mit hohem Transferkoeffizienten in den Kernrauch.In both variants, the carrier materials for the filter core 22 should contain additives, namely once the usual additives, such as triacetin, flavor or aroma substances and / or largely neutral taste substances with a high transfer coefficient into the core smoke.

Der Filterkern 22 ist von einer luftundurchlässigen Umhüllung 24 umgeben, die beispielsweise aus nicht porösem Filterpapier bestehen kann.The filter core 22 is surrounded by an air-impermeable covering 24, which can consist, for example, of non-porous filter paper.

Für die beiden Filterzonen 22, 26 können die folgenden Kennzahlen angegeben werden:The following key figures can be given for the two filter zones 22, 26:

Das Verhältnis der spezifischen Zugwiderstände des Filtermantels 26 zu dem des Filterkerns 22 beträgt "geschlossen gemessen", also ohne Berücksichti­gung der Ventilation, mindestens 1,4.The ratio of the specific tensile resistances of the filter jacket 26 to that of the filter core 22 is “measured closed”, that is to say without taking ventilation into account, at least 1.4.

Der periphere Filtermantel 26 hat, bezogen auf den peripheren Rauchstrom, zusammen mit der Ventilation über die Ventilationsöffnungen 30 einen Re­duzierungsgrad von mindestens 90 %; und der Filterkern 22 hat, bezogen auf den Kernrauch, eine Filterwirksamkeit von höchstens 40 %.The peripheral filter jacket 26, based on the peripheral smoke flow, together with the ventilation via the ventilation openings 30, has a degree of reduction of at least 90%; and the filter core 22 has a filter efficiency of at most 40%, based on the core smoke.

Bei der beschriebenen Koaxialcigarette 10 entstehen also Verbrennungspro­dukte sowohl im Innenkern 14 als auch im Außenmantel 18 des Strangteils 12. Während eines Zuges stammen die Verbrennungsprodukte im wesentlichen nur aus dem Außenmantel 18 des Strangteils 12, so daß fast alle Verbrennungs­ produkte auf getrennten Bahnen geleitet, durch den Koaxialfilter 15 geführt und dadurch gezielt so beeinflußt werden können, daß sich ohne Beein­trächtigung des Geschmacks nur wenig Kondensat ergibt, das weitgehend frei von den sonst üblichen Verbrennungsprodukten ist.In the coaxial cigarette 10 described, combustion products thus arise both in the inner core 14 and in the outer jacket 18 of the strand part 12. During a train, the combustion products essentially only come from the outer jacket 18 of the strand part 12, so that almost all of the combustion Products passed on separate paths, passed through the coaxial filter 15 and can be influenced in a targeted manner so that there is little condensate without affecting the taste, which is largely free of the usual combustion products.

Claims (20)

1. Koaxialcigarette a) mit einem Innenkern aus einem weitgehend rückstandsfrei verglimmenden Material, insbesondere Tabakmaterial, b) mit einer Umhüllung für den Innenkern, c) mit einem den Innenkern bzw. seine Umhüllung koaxial umgebenden Außen­mantel aus einem Tabak- und/oder Nichttabakmaterial, und mit d) einer Umhüllung für den Außenmantel, gekennzeichnet durch die folgenden Merkmale: e) es ist ein ventilierter Koaxialfilter (15) vorgesehen mit
e1) einem Filterkern (22), dessen Innendurchmesser etwa dem Durchmesser des Innenkerns (14) entspricht, und mit
e2) einem Filtermantel (26); f) der Filterkern (22) hat eine luftundurchlässige Umhüllung (24); g) der Filtermantel (26) hat eine luftdurchlässige Umhüllung (28); h) die Umhüllung (16) des Innenkerns (14) und die Umhüllung (20) des Außen­mantels (18) sind mit Glimmsalzen versehen; und i) der Zugwiderstand des Innenkerns (14) ist niedriger als der Zugwider­stand des Außenmantels (18). 1. Coaxial cigarette a) with an inner core made of a largely residue-free smoldering material, in particular tobacco material, b) with a covering for the inner core, c) with an outer casing made of a tobacco and / or non-tobacco material coaxially surrounding the inner core or its casing, and with d) an envelope for the outer jacket, characterized by the following features: e) a ventilated coaxial filter (15) is provided with
e1) a filter core (22), the inner diameter of which corresponds approximately to the diameter of the inner core (14), and with
e2) a filter jacket (26); f) the filter core (22) has an air-impermeable covering (24); g) the filter jacket (26) has an air-permeable covering (28); h) the covering (16) of the inner core (14) and the covering (20) of the outer casing (18) are provided with glow salts; and i) the tensile resistance of the inner core (14) is lower than the tensile resistance of the outer jacket (18). 2. Koaxialcigarette nach Anspruch 1, dadurch gekennzeichnet, daß die Ven­tilation des Koaxialfilters (15) 50 bis 80 % beträgt.2. Coaxial cigarette according to claim 1, characterized in that the ventilation of the coaxial filter (15) is 50 to 80%. 3. Koaxialcigarette nach einem der Ansprüche 1 oder 2, dadurch gekennzeich­net, daß der Innendurchmesser des Filterkerns (22) etwas kleiner als der Innendurchmesser des Innenkerns (14) ist.3. Coaxial cigarette according to one of claims 1 or 2, characterized in that the inner diameter of the filter core (22) is slightly smaller than the inner diameter of the inner core (14). 4. Koaxialcigarette nach einem der Ansprüche 1 bis 3, dadurch gekennzeich­net, daß die Umüllung (24) des Filterkerns (22) aus einem luftundurchlässi­gen Cigarettenpapier besteht.4. Coaxial cigarette according to one of claims 1 to 3, characterized in that the covering (24) of the filter core (22) consists of an air-impermeable cigarette paper. 5. Koaxialcigarette nach einem der Ansprüche 1 bis 4, dadurch gekennezeich­net, daß die Umhüllung (28) des Filtermantels (26) aus einem hochporösen Umhüllungs-Papier und einem hochporösen Belagpapier mit zusätzlicher laser­perforierter Ventilationszone (30) zumindest durch das Belagpapier besteht.5. Coaxial cigarette according to one of claims 1 to 4, characterized in that the covering (28) of the filter jacket (26) consists of a highly porous wrapping paper and a highly porous covering paper with additional laser-perforated ventilation zone (30) at least through the covering paper. 6. Koaxialcigarette nach Anspruch 5, dadurch gekennzeichnet, daß die Porösität des Belagpapiers mindestens 5000 CU und die Porösität des Um­hüllungspapiers mindestens 10000 CU betragen.6. Coaxial cigarette according to claim 5, characterized in that the porosity of the covering paper is at least 5000 CU and the porosity of the wrapping paper is at least 10000 CU. 7. Koaxialcigarette nach einem der Ansprüche 1 bis 6, dadurch gekennzeich­net, daß der Filterkern (22) aus porösen Trägermaterialien mit großer spe­zifischer Oberfläche besteht.7. Coaxial cigarette according to one of claims 1 to 6, characterized in that the filter core (22) consists of porous carrier materials with a large specific surface. 8. Koaxialcigarette nach Anspruch 7, dadurch gekennzeichnet, daß als Trägermaterialien geschäumte, extrudierte, gesinterte, gepreßte oder ge­formte Materialien wie z. B. Kohle, Tabak- oder Nicht-Tabakmaterialien ver­wendet werden.8. coaxial cigarette according to claim 7, characterized in that foamed, extruded, sintered, pressed or molded materials such as. B. coal, tobacco or non-tobacco materials can be used. 9. Koaxialcigarette nach einem der Ansprüche 1 bis 8, dadurch gekennzeich­net, daß die Filtermaterialien des Filterkerns (22) und/oder des Filter­mantels (26) mit Additiven versetzt sind.9. Coaxial cigarette according to one of claims 1 to 8, characterized in that the filter materials of the filter core (22) and / or the filter jacket (26) are mixed with additives. 10. Koaxialcigarette nach einem der Ansprüche 1 bis 9, dadurch gekennzeich­net, daß das Verhältnis der spezifischen Zugwiderstände des Filtermantels (26) zu dem des Filterkerns (22) "geschlossen gemessen" mindestens 1,4 be­trägt.10. Coaxial cigarette according to one of claims 1 to 9, characterized in that the ratio of the specific tensile resistances of the filter jacket (26) to that of the filter core (22) "measured closed" is at least 1.4. 11. Koaxialcigarette nach einem der Ansprüche 1 bis 10, dadurch gekenn­zeichnet, daß der Filtermantel (26), bezogen auf den peripheren Rauchstrom, zusammen mit der vorgesehenen Ventilation einen Reduzierungsgrad von min­destens 90 % hat.11. Coaxial cigarette according to one of claims 1 to 10, characterized in that the filter jacket (26), based on the peripheral smoke flow, together with the ventilation provided has a degree of reduction of at least 90%. 12. Koaxialcigarette nach einem der Ansprüche 1 bis 11, dadurch gekenn­zeichnet, daß der Filterkern (22), bezogen auf den Kernrauch, eine Filter­wirksamkeit von höchstens 40 % hat.12. Coaxial cigarette according to one of claims 1 to 11, characterized in that the filter core (22), based on the core smoke, has a filter efficiency of at most 40%. 13. Koaxialcigarette nach einem der Ansprüche 1 bis 12, dadurch gekenn­zeichnet, daß der Innenkern (14) eine poröse Trägersubstanz mit hoher Auf­nahmefähigkeit für "Casing" enthält.13. Coaxial cigarette according to one of claims 1 to 12, characterized in that the inner core (14) contains a porous carrier substance with high absorption capacity for "casing". 14. Koaxialcigarette nach Anspruch 13, dadurch gekennzeichnet, daß als Trägersubstanz Tabakmaterial und/oder thermisch zersetzbares Nicht-Tabak­material verwendet werden.14. Coaxial cigarette according to claim 13, characterized in that tobacco material and / or thermally decomposable non-tobacco material are used as the carrier substance. 15. Koaxialcigarette nach Anspruch 14, dadurch gekennzeichnet, daß ein Tabakmaterial mit hohem Aromagehalt und/oder hohem Kondensatpotential sowie niedrigem Kohlenmonoxid-Potential verwendet wird.15. Coaxial cigarette according to claim 14, characterized in that a tobacco material with a high aroma content and / or high condensate potential and low carbon monoxide potential is used. 16. Koaxialcigarette nach einem der Ansprüche 1 bis 15, dadurch gekenn­zeichnet, daß die Umhüllung (16) des Innenkerns (14) leicht porös ist.16. Coaxial cigarette according to one of claims 1 to 15, characterized in that the covering (16) of the inner core (14) is slightly porous. 17. Koaxialcigarette nach Anspruch 16, dadurch gekennzeichnet, daß die Um­hüllung (16) des Innnenkerns (14) aus Cigarettenpapier, Tabakfolien oder anderen Naturstoffolien besteht.17. Coaxial cigarette according to claim 16, characterized in that the covering (16) of the inner core (14) consists of cigarette paper, tobacco foils or other natural material foils. 18. Koaxialcigarette nach Anspruch 17, dadurch gekennzeichnet, daß das Ci­garettenpapier zumindest teilweise Tabakrohstoff enthält.18. Coaxial cigarette according to claim 17, characterized in that the cigarette paper at least partially contains tobacco raw material. 19. Koaxialcigarette nach einem der Ansprüche 1 bis 18, dadurch gekenn­zeichnet, daß der Außenmantel (18) Tabakmaterialien und/oder Nicht-Tabak­materialien mit niedrigem Kondensatpotential und mit hoher Füllfähigkeit enthält.19. Coaxial cigarette according to one of claims 1 to 18, characterized in that the outer jacket (18) contains tobacco materials and / or non-tobacco materials with low condensate potential and with high filling capacity. 20. Koaxialcigarette nach einem der Ansprüche 1 bis 19, dadurch gekenn­zeichnet, daß die Umhüllung (20) des Außenmantels (18) aus porösem Cigarettenpapier mit einer Luftdurchlässigkeit von mehr als 30 CU besteht.20. Coaxial cigarette according to one of claims 1 to 19, characterized in that the covering (20) of the outer casing (18) consists of porous cigarette paper with an air permeability of more than 30 CU.
EP88119812A 1987-12-22 1988-11-28 Coaxial cigarette Expired - Lifetime EP0321740B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3743597 1987-12-22
DE3743597A DE3743597C1 (en) 1987-12-22 1987-12-22 Coaxial cigarette
SG69594A SG69594G (en) 1987-12-22 1994-05-28 Coaxial cigarette

Publications (2)

Publication Number Publication Date
EP0321740A1 true EP0321740A1 (en) 1989-06-28
EP0321740B1 EP0321740B1 (en) 1991-08-21

Family

ID=25863097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119812A Expired - Lifetime EP0321740B1 (en) 1987-12-22 1988-11-28 Coaxial cigarette

Country Status (7)

Country Link
US (1) US4874004A (en)
EP (1) EP0321740B1 (en)
JP (1) JPH0785709B2 (en)
CA (1) CA1299958C (en)
DE (2) DE3743597C1 (en)
HK (1) HK101594A (en)
SG (1) SG69594G (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474940A1 (en) * 1990-08-24 1992-03-18 Philip Morris Products Inc. Concentric smoking filter having discrete tow and web filter media
EP0482568A1 (en) * 1990-10-23 1992-04-29 R.J. Reynolds Tobacco Company Cigarette
EP0608047A2 (en) * 1993-01-19 1994-07-27 Philip Morris Products Inc. Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
US5423336A (en) * 1992-02-25 1995-06-13 H.F. & Ph.F. Reemtsma Gmbh & Co. Ventilated filter cigarette
EP0716816A3 (en) * 1994-12-12 1998-02-04 British-American Tobacco (Germany) GmbH Segmented filter cigarette
WO1998032345A1 (en) * 1997-01-28 1998-07-30 British American Tobacco (Investments) Limited Smoking articles
EP0875160A1 (en) * 1997-04-30 1998-11-04 British-American Tobacco (Germany) GmbH Ventilated filter cigarette with a coaxial filterelement
WO2012016795A1 (en) * 2010-08-04 2012-02-09 British American Tobacco (Investments) Limited Smoking article
CN102439408A (en) * 2009-05-25 2012-05-02 罗伯特·博世有限公司 Control device having a pressure sensor
US8550092B2 (en) 2007-07-17 2013-10-08 British American Tobacco (Investments) Limited Filter

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3836210C1 (en) * 1988-10-24 1989-10-12 B.A.T. Cigarettenfabriken Gmbh, 2000 Hamburg, De
US5265626A (en) * 1989-01-17 1993-11-30 B.A.T. Cigarettenfabriken Gmbh Coaxial filter cigarette
DE3901226C1 (en) * 1989-01-17 1990-07-26 B.A.T. Cigarettenfabriken Gmbh, 2000 Hamburg, De
DE3904948C1 (en) * 1989-02-17 1990-05-10 B.A.T. Cigarettenfabriken Gmbh, 2000 Hamburg, De Coaxial filter for a smokeable article
DK88890A (en) * 1989-04-14 1990-10-15 Tabac Fab Reunies Sa CIGARET AND FILTER THEREOF
GB8908535D0 (en) * 1989-04-14 1989-06-01 Tabac Fab Reunies Sa Cigarette and filter thereof
US4955397A (en) * 1989-07-10 1990-09-11 Brown & Williamson Tobacco Corporation Cigarette
US5746230A (en) * 1990-08-24 1998-05-05 Philip Morris Incorporated Concentric smoking filter having discrete tow and web filter media
DE4107522C2 (en) * 1991-03-08 1994-02-17 Bat Cigarettenfab Gmbh Coaxial cigarette
DE4127420C2 (en) * 1991-08-19 1996-07-25 Bat Cigarettenfab Gmbh Coaxial filter cigarette
GB9122447D0 (en) * 1991-10-23 1991-12-04 Rothmans Int Tobacco Lightweight cigarette filter and cigarettes incorporating such filters
DE4321069C2 (en) * 1993-06-24 1998-09-10 Bat Cigarettenfab Gmbh Coaxial filter cigarette
US5458107A (en) * 1994-03-04 1995-10-17 Balogh; Robert J. Flavor cigarettes
DE59506078D1 (en) * 1994-07-19 1999-07-08 Bat Cigarettenfab Gmbh Tobacco cartridge
DE19722812C2 (en) * 1997-05-30 2003-02-13 Bat Cigarettenfab Gmbh Ultralight coaxial cigarette with multi-part filter
GB9712815D0 (en) * 1997-06-19 1997-08-20 British American Tobacco Co Smoking article and smoking material therefor
DE19757712C1 (en) * 1997-12-23 1999-06-24 Bat Cigarettenfab Gmbh Cross flow barrier coaxial cigarette and method of making a coaxial cigarette
DE19854364A1 (en) 1998-11-25 2000-05-31 Hauni Maschinenbau Ag Method and device for producing coaxial cigarettes
DE602004004919T2 (en) * 2003-09-30 2007-11-08 R.J. Reynolds Tobacco Company SMOKING ROD FOR ONE CIGARETTE
US7503330B2 (en) * 2003-09-30 2009-03-17 R.J. Reynolds Tobacco Company Smokable rod for a cigarette
US20050066986A1 (en) * 2003-09-30 2005-03-31 Nestor Timothy Brian Smokable rod for a cigarette
GB0809857D0 (en) * 2008-05-30 2008-07-09 British American Tobacco Co Smoking article filter ventilation
US8905037B2 (en) * 2009-10-15 2014-12-09 Philip Morris Inc. Enhanced subjective activated carbon cigarette
US8997755B2 (en) * 2009-11-11 2015-04-07 R.J. Reynolds Tobacco Company Filter element comprising smoke-altering material
US10609955B2 (en) 2011-04-08 2020-04-07 R.J. Reynolds Tobacco Company Filtered cigarette comprising a tubular element in filter
US11957163B2 (en) 2011-04-08 2024-04-16 R.J. Reynolds Tobacco Company Multi-segment filter element including smoke-altering flavorant
CN105105330A (en) * 2015-07-23 2015-12-02 云南养瑞科技集团有限公司 Filamentous or flake filter material coaxial core filter stick
CN107048473A (en) * 2017-06-06 2017-08-18 陈绍明 high fuel efficiency cigarette
KR102217756B1 (en) * 2019-08-20 2021-02-18 주식회사 케이티앤지 Smoking article having multi aerosol generating substrate

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219040A (en) * 1962-02-14 1965-11-23 Kim Chun Kon Smoking device
US3614956A (en) * 1967-09-07 1971-10-26 Brown & Williamson Tobacco Smoking articles
DE2620335A1 (en) * 1976-05-07 1977-11-24 Brasec Gmbh Chemisch Physikali Cigarettes low in toxic smoke components - with empty central tube of air impermeable walls and filter tip
FR2452257A1 (en) * 1979-03-27 1980-10-24 Cigarette Components Ltd SMOKE FILTERS AND THEIR MANUFACTURING METHOD
GB2069310A (en) * 1980-02-20 1981-08-26 Molins Ltd Manufacture of cigarettes
FR2524274A1 (en) * 1982-04-05 1983-10-07 Filtrona Ltd CIGARETTE FILTER
DE3602846A1 (en) * 1985-02-01 1986-08-07 British-American Tobacco Co. Ltd., London SMOKABLE ITEM

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR998556A (en) * 1945-10-29 1952-01-21 Papeteries De Mauduit Sa Des Cigarette
US4219031A (en) * 1979-03-05 1980-08-26 Philip Morris Incorporated Smoking product having core of fibrillar carbonized matter
DE3105548A1 (en) * 1980-02-20 1982-02-04 Molins Ltd., London PRODUCTION OF CIGARETTES
CA1246415A (en) * 1985-05-15 1988-12-13 Warren A. Brackmann Composite cigarettes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219040A (en) * 1962-02-14 1965-11-23 Kim Chun Kon Smoking device
US3614956A (en) * 1967-09-07 1971-10-26 Brown & Williamson Tobacco Smoking articles
DE2620335A1 (en) * 1976-05-07 1977-11-24 Brasec Gmbh Chemisch Physikali Cigarettes low in toxic smoke components - with empty central tube of air impermeable walls and filter tip
FR2452257A1 (en) * 1979-03-27 1980-10-24 Cigarette Components Ltd SMOKE FILTERS AND THEIR MANUFACTURING METHOD
GB2069310A (en) * 1980-02-20 1981-08-26 Molins Ltd Manufacture of cigarettes
FR2524274A1 (en) * 1982-04-05 1983-10-07 Filtrona Ltd CIGARETTE FILTER
DE3602846A1 (en) * 1985-02-01 1986-08-07 British-American Tobacco Co. Ltd., London SMOKABLE ITEM

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR25717A (en) * 1990-08-24 1993-09-01 Philip Morris Productsinc CONCENTRIC CIGARETTE FILTER WITH SEPARATED KIT AND WEAVING FILTER MEDIA
EP0474940A1 (en) * 1990-08-24 1992-03-18 Philip Morris Products Inc. Concentric smoking filter having discrete tow and web filter media
EP0482568A1 (en) * 1990-10-23 1992-04-29 R.J. Reynolds Tobacco Company Cigarette
US5423336A (en) * 1992-02-25 1995-06-13 H.F. & Ph.F. Reemtsma Gmbh & Co. Ventilated filter cigarette
EP0608047A2 (en) * 1993-01-19 1994-07-27 Philip Morris Products Inc. Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
EP0608047A3 (en) * 1993-01-19 1994-11-17 Philip Morris Prod Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core.
EP0716816A3 (en) * 1994-12-12 1998-02-04 British-American Tobacco (Germany) GmbH Segmented filter cigarette
US6257243B1 (en) 1997-01-28 2001-07-10 Brown & Williamson Tobacco Corporation Smoking articles
WO1998032345A1 (en) * 1997-01-28 1998-07-30 British American Tobacco (Investments) Limited Smoking articles
EP0875160A1 (en) * 1997-04-30 1998-11-04 British-American Tobacco (Germany) GmbH Ventilated filter cigarette with a coaxial filterelement
US5979459A (en) * 1997-04-30 1999-11-09 Brown & Williamson Tobacco Corporation Ventilated filter cigarette with a coaxial filter element
US8550092B2 (en) 2007-07-17 2013-10-08 British American Tobacco (Investments) Limited Filter
US9078471B2 (en) 2007-07-17 2015-07-14 British American Tobacco (Investments) Limited Filter
US10334875B2 (en) 2007-07-17 2019-07-02 British American Tobacco (Investments) Limited Filter
CN102439408A (en) * 2009-05-25 2012-05-02 罗伯特·博世有限公司 Control device having a pressure sensor
WO2012016795A1 (en) * 2010-08-04 2012-02-09 British American Tobacco (Investments) Limited Smoking article

Also Published As

Publication number Publication date
CA1299958C (en) 1992-05-05
DE3864396D1 (en) 1991-09-26
SG69594G (en) 1995-03-17
JPH01265877A (en) 1989-10-23
JPH0785709B2 (en) 1995-09-20
HK101594A (en) 1994-09-30
US4874004A (en) 1989-10-17
EP0321740B1 (en) 1991-08-21
DE3743597C1 (en) 1989-02-16

Similar Documents

Publication Publication Date Title
EP0321740B1 (en) Coaxial cigarette
DE3936249C2 (en) Smoking articles
DE3908160C2 (en)
DE3121170C2 (en) Tobacco smoke filter
EP1321050B1 (en) Filter for a smoking article
DE3150087C2 (en)
EP0365882B1 (en) Coaxial cigarette
DE3901226C1 (en)
DE4321069A1 (en) Coaxial filter cigarette
DE2251903B2 (en) VENTILATED FILTER CIGARETTE
EP0693258B1 (en) Tobacco cartridge
AT394928B (en) VENTILATED CIGARETTE FILTER AND FILTER CIGARETTE
DE4127420C2 (en) Coaxial filter cigarette
DE3715257C2 (en) Whole tobacco cigarettes with reduced tar tax
EP0716816B1 (en) Segmented filter cigarette
DE3304764C2 (en)
DE19703003A1 (en) Cigarette with reduced staining and reduced sidestream smoke
EP0503461B1 (en) Coaxial cigarette
DE3201101A1 (en) Cigarette filter rod
DE3408415C2 (en)
DE4118815C2 (en) Process for producing a cigarette filter and cigarette filter produced by this process
CH679633A5 (en)
DE3250135C2 (en) Cigarette filter covered by tubular wall
DE2620335A1 (en) Cigarettes low in toxic smoke components - with empty central tube of air impermeable walls and filter tip
DE1532129C (en) Smoking device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR GB GR IT LI LU NL

17P Request for examination filed

Effective date: 19890719

17Q First examination report despatched

Effective date: 19900827

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB GR IT LI LU NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19910821

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910821

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

REF Corresponds to:

Ref document number: 3864396

Country of ref document: DE

Date of ref document: 19910926

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EPTA Lu: last paid annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: BRITISH-AMERICAN TOBACCO (GERMANY) GMBH

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: BRITISH-AMERICAN TOBACCO (GERMANY) GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20071026

Year of fee payment: 20

Ref country code: DE

Payment date: 20071029

Year of fee payment: 20

Ref country code: NL

Payment date: 20071017

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20071019

Year of fee payment: 20

Ref country code: IT

Payment date: 20071023

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20071122

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20071011

Year of fee payment: 20

Ref country code: GB

Payment date: 20071018

Year of fee payment: 20

BE20 Be: patent expired

Owner name: *BRITSH-AMERICAN TOBACCO (GERMANY) G.M.B.H.

Effective date: 20081128

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20081127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20081128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20081127