EP0151732A1 - Ventilated cigarette filter with a grooved filter - Google Patents

Ventilated cigarette filter with a grooved filter Download PDF

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Publication number
EP0151732A1
EP0151732A1 EP84114971A EP84114971A EP0151732A1 EP 0151732 A1 EP0151732 A1 EP 0151732A1 EP 84114971 A EP84114971 A EP 84114971A EP 84114971 A EP84114971 A EP 84114971A EP 0151732 A1 EP0151732 A1 EP 0151732A1
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EP
European Patent Office
Prior art keywords
filter
groove
cigarette
air
tobacco
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP84114971A
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German (de)
French (fr)
Inventor
Paul Rieth
J.-Detlev Frhr. von Dr. Uexküll
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.)
HF and PhF Reemtsma GmbH and Co
Original Assignee
HF and PhF Reemtsma GmbH and Co
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 HF and PhF Reemtsma GmbH and Co filed Critical HF and PhF Reemtsma GmbH and Co
Publication of EP0151732A1 publication Critical patent/EP0151732A1/en
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution

Definitions

  • the invention relates to a ventilated filter cigarette with a groove filter according to the preamble of the main claim.
  • Such ventilated cigarettes are e.g. according to DE-PS 16 57 261 known. They have a fully cylindrical filter body with an air-impermeable sleeve surrounding it, on the circumferential surface of which a plurality of groove-like channels which are essentially axially extending and open both on the mouth side and on the tobacco side are arranged at a distance from one another; in these ventilated filter cigarettes, the filter body or the groove filter and the filter-side end of the cigarette are surrounded by an air-impermeable wrapping sheet which is air-permeable at least in the region of the groove-like channels.
  • the air permeability is usually brought about by mechanical or electrostatic perforation of an air-impermeable wrapping sheet.
  • the amount of additional air in such ventilated filter cigarettes depends on several factors, such as the air permeability of the wrapping sheet, ie the number and size of the perforations and also the size and number of channels in the groove filter, the filter resistance and what happens when the cigarette is burned off changing series resistance of the tobacco rod. By carefully coordinating these parameters, the desired additional air range can be maintained. If you want to increase or decrease the proportion of the additional air, groove filters with other, for example larger grooves and / or with wrapping sheets with different types of perforation must be used. This makes the changeover in the manufacture of cigarettes considerably more difficult.
  • the present invention has set itself the task of eliminating these disadvantages and in particular to enable a quick changeover in the production of low-ventilated or more ventilated filter cigarettes.
  • the degree of ventilation can be influenced in a very simple manner.
  • the further cylindrical filter element can be designed as a hollow cylinder, the wall thickness of which corresponds to the groove depth of the groove filter.
  • the groove filter can thus be of a uniform and unchanged design;
  • the wrapping sheet with the perforated areas can always be used in the same quality, with only a different, more or less compressed further cylindrical filter part now being used or exchanged between the groove filter and the tobacco rod to change the degree of additional air.
  • the groove filter and the further cylindrical filter element can optionally be combined to form a filter unit by an air-permeable intermediate sheet.
  • the number of grooves in the groove filter can be chosen arbitrarily and, for example, only be 3 to 5 grooves; but it is also possible to provide about 10 to 14 grooves according to the groove filter described in DE-PS 16 57 261.
  • the air-impermeable sleeve of the groove body is preferably a thin layer of polyethylene; but it can also be achieved by gluing the outer wall of the filter material.
  • a tobacco section 12 with a tobacco rod 14 and a paper tube 16 is provided for this.
  • a further cylindrical filter element 30 is provided between the groove filter 18 and the tobacco section 12, which is likewise held by the wrapping sheet 26 and, together with the groove filter 18, is connected to the tobacco rod surrounded by a paper tube 16.
  • the further cylindrical filter element 30 can be gripped by the paper tube surrounding the tobacco rod.
  • the further cylindrical filter element 30 has a compressed region 30a in the region of the groove-like channels 24 open on the tobacco side and a less compressed region in the core region 30b.
  • the compression of cylindrical filter elements in the outer area is known per se, it is carried out by mechanical influence during manufacture and / or by slight gluing of the individual fibers of the filter material.
  • the filter element 30 ' is designed as a hollow cylinder.
  • the inner surface of this hollow cylinder can optionally be sealed with an air-impermeable layer or inner sleeve in order to completely prevent smoke from passing into the ventilation channels.
  • the ring part 30'a forming a greater resistance consists of any filter material, while the inner region 30'b is left hollow or can also be filled with a suitable filter material.
  • the wall thickness of this cylinder ring or hollow cylinder should be at least as large as the groove depth of the groove filter. In extreme cases, the tensile resistance of the ring part 30 or the denser region 30a can be greater than that of the filter 20.

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

Abstract

A ventilated filter cigarette having a grooved filter (18) which consists of a completely cylindrical filter body (20) having an air-impermeable sleeve surrounding it, on the circumferential surface of which sleeve a plurality of groove-like ducts (24) which extend substantially axially and are open at both the mouth end and the tobacco end, are arranged at a distance from each other, and in which the filter body and the filter end of the cigarette are surrounded by a wrapping leaf (26) which is impermeable to air, at least in the region of the groove-like duct. According to the invention, the ventilated filter cigarette is characterised by the combination of such a grooved filter with a further cylindrical filter element (30) between the latter and the tobacco rod which, in the region (30a) of the ends of the groove-like ducts (24) which are open at the tobacco end, exhibits a higher drawing resistance and/or a lower permeability to smoke than in the region of the cylindrical core (30b).

Description

Die Erfindung betrifft eine ventilierte Filterzigarette mit Rillenfilter gemäß Oberbegriff des Hauptanspruches.The invention relates to a ventilated filter cigarette with a groove filter according to the preamble of the main claim.

Derartige ventilierte Zigaretten sind z.B. gemäß DE-PS 16 57 261 bekannt. Sie haben einen vollzylindrischen Filterkörper mit einer diesen umgebenden luftundurchlässigen Hülse, auf deren Umfangsfläche mehrere sich im wesentlichen axial erstreckende und sowohl mundseitig als auch tabaksseitig offene rillenartige Kanäle mit Abstand zueinander angeordnet sind; bei diesen ventilierten Filterzigaretten wird der Filterkörper bzw. der Rillenfilter und das filterseitige Ende der Zigarette von einem luftundurchlässigen Umhüllungsblatt umgeben, das zumindest im Bereich der rillenartigen Kanäle luftdurchlässig ist. Die Luftdurchlässigkeit wird in der Regel durch mechanische oder elektrostatische Perforation eines an sich luftundurchlässigen Umhüllungsblattes bewirkt. Durch diese Perforationen und die rillenartigen Kanäle strömt die Beiluft getrennt von dem Rauch in den Mund des Rauchers. Es sind auch andere Rillenfilter z.B. gemäß DE-AS 21 07 850 oder DE-PS 24 09 023 bekannt, bei denen die Rillen entweder nur zur mundseitigen bzw. nur zum tabakseitigen Ende hin verschlossenSuch ventilated cigarettes are e.g. according to DE-PS 16 57 261 known. They have a fully cylindrical filter body with an air-impermeable sleeve surrounding it, on the circumferential surface of which a plurality of groove-like channels which are essentially axially extending and open both on the mouth side and on the tobacco side are arranged at a distance from one another; in these ventilated filter cigarettes, the filter body or the groove filter and the filter-side end of the cigarette are surrounded by an air-impermeable wrapping sheet which is air-permeable at least in the region of the groove-like channels. The air permeability is usually brought about by mechanical or electrostatic perforation of an air-impermeable wrapping sheet. Through these perforations and the groove-like channels, the additional air flows separately from the smoke into the smoker's mouth. There are also other groove filters e.g. according to DE-AS 21 07 850 or DE-PS 24 09 023, in which the grooves are either closed only towards the mouth-side or only towards the tobacco-side end

Der Anteil der Beiluft hängt bei derartigen ventilierten Filterzigaretten von mehreren Faktoren wie beispielsweise von der Luftdurchlässigkeit des Umhüllungsblattes, d.h. von der Anzahl und Größe der Perforationen und ferner von der Größe und Anzahl der Kanäle im Rillenfilter, vom Filterwiderstand und von dem sich beim Abbrennen der Zigarette ändernden Vorwiderstand des Tabakstranges ab. Durch sorgfältige Abstimmung dieser Parameter läßt sich der jeweils gewünschte Beiluftbereich einhalten. Will man den Anteil der Beiluft vergrößern bzw. verkleinern, müssen Rillenfilter mit anderen, beispielsweise größeren Rillen und/oder mit Umhüllungsblätter mit andersartiger Perforation eingesetzt werden. Dieses erschwert die Umstellung bei der Zigarettenherstellung erheblich.The amount of additional air in such ventilated filter cigarettes depends on several factors, such as the air permeability of the wrapping sheet, ie the number and size of the perforations and also the size and number of channels in the groove filter, the filter resistance and what happens when the cigarette is burned off changing series resistance of the tobacco rod. By carefully coordinating these parameters, the desired additional air range can be maintained. If you want to increase or decrease the proportion of the additional air, groove filters with other, for example larger grooves and / or with wrapping sheets with different types of perforation must be used. This makes the changeover in the manufacture of cigarettes considerably more difficult.

Die vorliegende Erfindung hat sich die Aufgabe gestellt, diese Nachteile zu beseitigen und insbesondere eine schnelle Umstellung bei der Herstellung von geringbelüfteten oder stärker belüfteten Filterzigaretten zu ermöglichen.The present invention has set itself the task of eliminating these disadvantages and in particular to enable a quick changeover in the production of low-ventilated or more ventilated filter cigarettes.

Zur Lösung dieser Aufgabe wird daher ein Filter gemäß Kennzeichen des Hauptanspruches vorgeschlagen, wobei besonders bevorzugte Ausführungsformen in den Unteransprüchen erwähnt sind.To achieve this object, a filter according to the characterizing part of the main claim is therefore proposed, particularly preferred embodiments being mentioned in the subclaims.

Überraschenderweise hat sich gezeigt, daß man durch die Kombination eines Rillenfilters der eingangs beschriebenen Art mit einem zwischen diesem und dem Tabakstrang angeordneten weiteren zylindrischen Filterelement, das im Bereich der tabakseitig offenen Enden der rillenartigen Kanäle ein höheren Zugwiderstand bzw. eine geringere Rauchdurchlässigkeit als im Bereich des Zylinderkernes hat, der Belüftungsgrad auf äußerst einfache Weise beeinflußt werden kann. Je höher nämlich die Verdichtung in dem äußeren ringförmigen Zylinderbereich des weiteren zylindrischen Filterelementes ist desto höher wird der Anteil der Beiluft. Im Extremfall kann das weitere zylindrische Filterelement als Hohlzylinder ausgebildet sein, dessen Wandstärke der Rillentiefe des Rillenfilters entspricht.Surprisingly, it has been found that by combining a groove filter of the type described at the outset with a further cylindrical filter element arranged between it and the tobacco rod, the tensile resistance or a lower smoke permeability in the area of the tobacco-side ends of the groove-like channels is lower than in the area of the Has cylinder core, the degree of ventilation can be influenced in a very simple manner. The higher the compression in the outer annular cylinder region of the further cylindrical filter element, the higher the proportion of the incoming air. In an extreme case, the further cylindrical filter element can be designed as a hollow cylinder, the wall thickness of which corresponds to the groove depth of the groove filter.

Bei den erfindungsgemäßen ventilierten Filterzigaretten kann also der Rillenfilter einheitlich und unverändert ausgebildet sein; ebenso kann das Umhüllungsblatt mit den perforierten Bereichen in immer gleicher Qualität eingesetzt werden, wobei zur Veränderung des Beiluftgrades nunmehr nur ein anderer, mehr oder weniger verdichteter weiterer zylindrischer Filterteil zwischen dem Rillenfilter und dem Tabaksstrang eingesetzt bzw. ausgetauscht wird.In the case of the ventilated filter cigarettes according to the invention, the groove filter can thus be of a uniform and unchanged design; Likewise, the wrapping sheet with the perforated areas can always be used in the same quality, with only a different, more or less compressed further cylindrical filter part now being used or exchanged between the groove filter and the tobacco rod to change the degree of additional air.

Der Rillenfilter und das weitere zylindrische Filterelement können gegebenenfalls durch ein luftdurchlässiges Zwischenblatt zu einer Filtereinheit zusammengefaßt werden.The groove filter and the further cylindrical filter element can optionally be combined to form a filter unit by an air-permeable intermediate sheet.

Die Zahl der Rillen im Rillenfilter kann beliebig gewählt werden und beispielsweise nur 3 bis 5 Rillen betragen; es ist aber auch möglich gemäß dem in der DE-PS 16 57 261 beschriebenen Rillenfilter etwa 10 bis 14 Rillen vorzusehen.The number of grooves in the groove filter can be chosen arbitrarily and, for example, only be 3 to 5 grooves; but it is also possible to provide about 10 to 14 grooves according to the groove filter described in DE-PS 16 57 261.

Die luftundurchlässige Hülse des Rillenkörpers ist vorzugsweise eine dünne Polyethylenschicht; sie kann aber auch durch eine Verklebung der Außenwand des Filtermaterials erzielt werden.The air-impermeable sleeve of the groove body is preferably a thin layer of polyethylene; but it can also be achieved by gluing the outer wall of the filter material.

Im folgenden soll die Erfindung anhand von Zeichnungen näher erläutert werden; es zeigen:

  • Figur 1 eine perspektivische Teilansicht der erfindungsgemäßen Zigarette;
  • Figur 2 einen Längsschnitt durch die in Figur 1 gezeigte erfindungsgemäße Zigarette;
  • Figur 3 einen Längsschnitt analog Figur 2 mit einer alternativen Ausbildung des weiteren zylindrischen Filterelementes.
In the following the invention will be explained in more detail with reference to drawings; show it:
  • Figure 1 is a partial perspective view of the cigarette according to the invention;
  • FIG. 2 shows a longitudinal section through the cigarette according to the invention shown in FIG. 1;
  • Figure 3 shows a longitudinal section analogous to Figure 2 with an alternative embodiment of the further cylindrical filter element.

Bei der in Figur 1 dargestellten Filterzigarette ist ein Tabakabschnitt 12 mit einem Tabakstrang 14 und einer Papierhülse 16 für diesen vorgesehen.In the filter cigarette shown in FIG. 1, a tobacco section 12 with a tobacco rod 14 and a paper tube 16 is provided for this.

Der Rillenfilter 18 besteht aus einem zylindrischen Filterkörper 20 mit einer luftundurchlässigen Hülse 22, in deren Umfangsfläche rillenartige Kanäle 24 eingelassen sind. Dieser Rillenfilter 18 ist von einem Umhüllungsblatt 26 umgeben, in dem im Bereich der Kanäle Perforationen 28 vorgesehen sind.The groove filter 18 consists of a cylindrical filter body 20 with an air-impermeable sleeve 22, in the circumferential surface of which groove-like channels 24 are embedded. This groove filter 18 is surrounded by a wrapping sheet 26, in which perforations 28 are provided in the region of the channels.

Die Beiluft strömt durch die Perforationen 28 und die Kanäle 24 und gelangt getrennt von dem durch den Filterkern 20 des Rillenfilters strömenden Rauch in den Mund des Rauchers. Zwischen dem Rillenfilter 18 und dem Tabakabschnitt 12 ist ein weiteres zylindrisches Filterelement 30 vorgesehen, das ebenfalls von dem Umhüllungsblatt 26 gehalten und zusammen mit dem Rillenfilter 18 mit dem von einer Papierhülse 16 umgebenden Tabakstrang verbunden wird. Selbstverständlich ist es auch möglich, das weitere zylindrische Filterelement 30 zusammen mit dem Rillenfilter 18 mittels eines luftdurchlässigen Zwischenblattes zu einer Filtereinheit zu verbinden. Bei einer anderen Ausführungsform kann das weitere zylindrische Filterelement 30 von der dem Tabakstrang umgebenden Papierhülse erfaßt werden.The auxiliary air flows through the perforations 28 and the channels 24 and, separate from the smoke flowing through the filter core 20 of the groove filter, reaches the smoker's mouth. A further cylindrical filter element 30 is provided between the groove filter 18 and the tobacco section 12, which is likewise held by the wrapping sheet 26 and, together with the groove filter 18, is connected to the tobacco rod surrounded by a paper tube 16. Of course, it is also possible to connect the further cylindrical filter element 30 together with the groove filter 18 by means of an air-permeable intermediate sheet to form a filter unit. In another embodiment, the further cylindrical filter element 30 can be gripped by the paper tube surrounding the tobacco rod.

Wesentlich ist, daß das weitere zylindrische Filterelement 30 im Bereich der tabakseitig offenen rillenartigen Kanäle 24 einen verdichteten Bereich 30a und im Kernbereich 30b einen weniger verdichteten Bereich aufweist.It is essential that the further cylindrical filter element 30 has a compressed region 30a in the region of the groove-like channels 24 open on the tobacco side and a less compressed region in the core region 30b.

Die Verdichtung von zylindrischen Filterelementen im Außenbereich ist an sich bekannt, sie erfolgt durch mechanische Beeinflussung bei der Herstellung und/oder durch geringfügiges Verkleben der einzelnen Fasern des Filtermaterials.The compression of cylindrical filter elements in the outer area is known per se, it is carried out by mechanical influence during manufacture and / or by slight gluing of the individual fibers of the filter material.

Bei einer weiteren Ausführungsform gemäß Figur 3 ist das Filterelement 30' als Hohlzylinder ausgebildet. Die Innenfläche dieses Hohlzylinders kann gegebenenfalls mit einer luftundurchlässigen Schicht oder Innenhülse abgedichtet sein, um einen Durchtritt von Rauch in die Belüftungskanäle völlig auszuschalten. Der einen größeren Widerstand bildende Ringteil 30'a besteht aus beliebigen Filtermaterial, während der innere Bereich 30'b hohl gelassen ist oder auch mit einem geeigneten Filtermaterial gefüllt sein kann. Selbstverständlich soll die Wandstärke dieses Zylinderringes oder Hohlzylinders mindestens so groß sein wie die Rillentiefe des Rillenfilters. Der Zugwiderstand des Ringteiles 30 oder des dichteren Bereiches 30a kann im Extremfall größer sein als der des Filters 20.In a further embodiment according to FIG. 3, the filter element 30 'is designed as a hollow cylinder. The inner surface of this hollow cylinder can optionally be sealed with an air-impermeable layer or inner sleeve in order to completely prevent smoke from passing into the ventilation channels. The ring part 30'a forming a greater resistance consists of any filter material, while the inner region 30'b is left hollow or can also be filled with a suitable filter material. Of course, the wall thickness of this cylinder ring or hollow cylinder should be at least as large as the groove depth of the groove filter. In extreme cases, the tensile resistance of the ring part 30 or the denser region 30a can be greater than that of the filter 20.

Claims (4)

1. Ventilierte Filterzigarette mit Rillenfilter, das aus einem vollzylindrischen Filterkörper mit einer diesen umgebenden luftundurchlässigen Hülse besteht, auf deren Umfangsfläche mehrere sich im wesentlichen axial erstreckende und sowohl mundseitig als tabakseitig offene rillenartige Kanäle mit Abstand zueinander angeordnet sind, und bei welcher der Filterkörper und das filterseitige Ende der Zigarette von inem Umhüllungsblatt umgeben sind, das mindestens im Bereich der rillenartigen Kanäle luftdurchlässig ist, gekennzeichnet durch die Kombination eines derartigen Rillenfilters (18) mit einem zwischen diesem und dem Tabakstrang (14) angeordneten weiteren zylindrischen Filterelement (30), das im Bereich der tabaksseitig offenen Enden der rillenartigen Kanäle (24) ein höheren Zugwiderstand bzw. eine geringere Rauchdurchlässigkeit als im Bereich des Zylinderkernes aufweist.1.Ventilated filter cigarette with a groove filter, which consists of a fully cylindrical filter body with an air-impermeable sleeve surrounding it, on the circumferential surface of which there are a plurality of essentially axially extending and both groove-side and tobacco-side open groove-like channels at a distance from one another, and in which the filter body and that The filter-side end of the cigarette is surrounded by a wrapping sheet which is permeable to air at least in the region of the groove-like channels, characterized by the combination of such a groove filter (18) with a further cylindrical filter element (30) arranged between it and the tobacco rod (14) Area of the tobacco side open ends of the groove-like channels (24) has a higher tensile resistance or a lower smoke permeability than in the area of the cylinder core. 2. Zigarette nach Anspruch 1, dadurch gekennzeichnet, daß bei dem weiteren zylindrischen Filterelement (30) die geringere Rauchdurchlässigkeit durch Verdichten oder Verkleben des äußeren ringförmigen Zylinderbereiches bis zu einer Tiefe entsprechend der Rillentiefe des Rillenfilters bewirkt ist.2. Z igarette according to claim 1, characterized in that the lower smoke permeability is effected by compacting or gluing of the outer annular cylinder portion up to a depth corresponding to the groove depth of the grooved filter in the further cylindrical filter element (30). 3. Zigarette nach Anspruch 1, dadurch gekennzeichnet, daß das weitere zylindrische Filterelement (30) als Hohlzylinder ausgebildet ist, dessen Wandstärke der Rillentiefe des Rillenfilters entspricht; (Fig. 3).3. Cigarette according to claim 1, characterized in that the further cylindrical filter element (30) is designed as a hollow cylinder, the wall thickness of which corresponds to the groove depth of the groove filter; (Fig. 3). 4. Zigarette nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der äußere ringförmige Zylinderbereich des weiteren zylindrischen Filterelementes (30) derart verdichtet ist, daß die Gesamtmenge der Beiluft beim Eintritt in den Mund des Rauchers 50 bis 90 Vol.% beträgt.4. Cigarette according to claim 1 to 3, characterized in that the outer annular cylinder region of the further cylindrical filter element (30) is compressed in such a way that the total amount of additional air when entering the smoker's mouth is 50 to 90% by volume.
EP84114971A 1983-12-13 1984-12-08 Ventilated cigarette filter with a grooved filter Ceased EP0151732A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3345000 1983-12-13
DE3345000A DE3345000C2 (en) 1983-12-13 1983-12-13 Ventilated filter cigarette with a groove filter

Publications (1)

Publication Number Publication Date
EP0151732A1 true EP0151732A1 (en) 1985-08-21

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Application Number Title Priority Date Filing Date
EP84114971A Ceased EP0151732A1 (en) 1983-12-13 1984-12-08 Ventilated cigarette filter with a grooved filter

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EP (1) EP0151732A1 (en)
DE (1) DE3345000C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203324A (en) * 1987-04-16 1988-10-19 Cigarette Components Ltd Ventilated cigarette filter
EP0476969A1 (en) * 1990-09-20 1992-03-25 Philip Morris Products Inc. Filter cigarette
WO2014207479A1 (en) * 2013-06-27 2014-12-31 British American Tobacco (Investments) Limited A method and an apparatus for manufacturing a filter for a smoking article

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1657261B1 (en) * 1967-04-20 1972-02-03 Philip Morris Inc Ventilation mouthpiece
DE2558004A1 (en) * 1975-10-30 1977-05-12 Liggett & Myers Inc CIGARETTE FILTER, METHOD AND DEVICE FOR ITS MANUFACTURING
FR2360269A1 (en) * 1976-08-02 1978-03-03 Wiggins Teape Ltd FIBROUS MATERIALS PERFECTED MOLDS
GB2098051A (en) * 1981-05-07 1982-11-17 Filtrona Ltd Tobacco smoke filter and method and apparatus for making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148080A (en) * 1979-05-07 1980-11-18 Mitsubishi Rayon Co Filter plug
DE3048905A1 (en) * 1980-12-23 1982-07-22 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Cigarette filter with impermeable wrapping - has troughs in wrapping running continuously from end to end

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1657261B1 (en) * 1967-04-20 1972-02-03 Philip Morris Inc Ventilation mouthpiece
DE2558004A1 (en) * 1975-10-30 1977-05-12 Liggett & Myers Inc CIGARETTE FILTER, METHOD AND DEVICE FOR ITS MANUFACTURING
FR2360269A1 (en) * 1976-08-02 1978-03-03 Wiggins Teape Ltd FIBROUS MATERIALS PERFECTED MOLDS
GB2098051A (en) * 1981-05-07 1982-11-17 Filtrona Ltd Tobacco smoke filter and method and apparatus for making same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203324A (en) * 1987-04-16 1988-10-19 Cigarette Components Ltd Ventilated cigarette filter
GB2203324B (en) * 1987-04-16 1991-05-29 Cigarette Components Ltd Ventilated cigarette filter
EP0476969A1 (en) * 1990-09-20 1992-03-25 Philip Morris Products Inc. Filter cigarette
WO2014207479A1 (en) * 2013-06-27 2014-12-31 British American Tobacco (Investments) Limited A method and an apparatus for manufacturing a filter for a smoking article

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Publication number Publication date
DE3345000C2 (en) 1985-10-31
DE3345000A1 (en) 1985-06-20

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