EP0146114B1 - Cigarette with a ventilated mouthpiece of one piece - Google Patents

Cigarette with a ventilated mouthpiece of one piece Download PDF

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Publication number
EP0146114B1
EP0146114B1 EP84115289A EP84115289A EP0146114B1 EP 0146114 B1 EP0146114 B1 EP 0146114B1 EP 84115289 A EP84115289 A EP 84115289A EP 84115289 A EP84115289 A EP 84115289A EP 0146114 B1 EP0146114 B1 EP 0146114B1
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EP
European Patent Office
Prior art keywords
core
air
casing
cigarette according
cigarette
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EP84115289A
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German (de)
French (fr)
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EP0146114A1 (en
Inventor
Henning Dr. Seidel
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HF and PhF Reemtsma GmbH and Co
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HF and PhF Reemtsma GmbH and Co
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Publication of EP0146114A1 publication Critical patent/EP0146114A1/en
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    • 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 cigarette with a one-piece ventilated filter mouthpiece, in which perforations of a substantially air-impermeable outer casing surrounding the outer mouthpiece and the smoke are conducted in axially parallel streams separately from one another to the mouth-side end of the filter mouthpiece and are only mixed in the mouth of the smoker. as further defined according to the preamble of the main claim.
  • a cigarette with such a filter mouthpiece is known for example from DE-C-16 57 261 and DE-B-1936429;
  • This ventilation mouthpiece consists of a one-piece cylindrical plastic body which, together with the filter or cigarette end, is enclosed by an outer casing which has air inlet openings for air supply ducts which are provided on the outer region of the cylindrical body in the longitudinal direction.
  • cigarettes with ventilated filter mouthpiece are known, in which the supply air and smoke are also conducted separately in parallel streams and are only mixed in the smoker's mouth;
  • these filters have a tubular sheath or air-impermeable layer made of a thermoplastic such as polyethylene, inside which there is filter material, while on the outer surface of the sheath there are concavely shaped grooves extending in the longitudinal direction;
  • there is also a wrapping film which surrounds the outer surface of the tubular casing and connects the latter to the tobacco rod, the wrapping film having perforations in the region of the channels formed by the concave ribs which supply the additional air.
  • the air-impermeable outer shell is pressed into the grooves leading to the by-air and partially or completely closes it when smoking due to the wet lip pressure of the smoker or when holding the cigarette with the teeth by the bite pressure.
  • the tobacco smoke contains more condensate and nicotine than with a determination method measured according to DIN 10240 and 10242 with a smoking machine with dry rubber lips, which can lead to a deception of the smoker.
  • filter mouthpieces of the known type can only be produced in a complex manner and in many cases not continuously.
  • the object of the invention is to propose a cigarette with a novel one-piece ventilated filter mouthpiece, in which the generally desired ventilation, i.e. the supply of additional air is guaranteed even when smoking with wet lips or when applying bite pressure, and on the other hand the mixing of additional air and smoke takes place only in the smoker's mouth, but now additional air and smoke should be guided in such a way that the main flow of smoke is bundled and encased by the air stream in a quasi-laminar manner and still fed separately to the smoker's mouth and mixed therein. Furthermore, it should be possible with a given degree of additional air that by appropriate dimensioning of the core or annulus uniform flow velocities of air and smoke flow can be achieved. Ultimately, according to the invention, a continuous or economical production of the filter elements is to be made possible, and finally the use of a less solidified filter material than previously customary should also be possible.
  • the inventive design of the filter mouthpiece with core sleeve and outer sleeve and with a corresponding cross-sectional ratio of the annular space and the core space makes it possible that the bypass air stream coming into the mouth from the coaxial annular space allows the smoke flow guided in a stranded manner from the core space to pass into the smoker's mouth in a quasi-encased manner.
  • the core stream which is much more densely guided, begins to mix more clearly in the smoker's mouth despite the beginning of mixing, as a result of the bundling of the core stream caused in this way.
  • the one-piece design of the core sleeve, outer sleeve and spacers allows an extremely economical and continuous production of the filter and gives the filter mouthpiece the sufficient strength, so that the annular space instead of the previously known small air ducts is now provided neither by wet lips nor by biting pressure with regard to the supply of Air can be restricted or closed.
  • the condensate and nicotine values measured according to the DIN standard with a smoking machine with rubber lips also correspond to the values actually occurring in the smoker's mouth.
  • the stability of the filter formed from the outer sleeve and the core sleeve results in the mutually stabilizing partial areas of high mechanical resilience, which not only has an advantageous effect on the above-mentioned unimpeded supply air, but also makes it possible that no filter material of high packing density has to be used. While the filter material used to be
  • any, also loose and more flexible filter material can now be used.
  • acetylated cellulose which has been hardened with triacetin, other filter materials without hardness or those with smaller amounts of hardeners can now also be used.
  • the tobacco section 112 is connected with a tobacco rod 114 and a paper sleeve 110 in alignment with the filter mouthpiece 118.
  • the mouthpiece 118 is formed by an outer sleeve 120 with perforation openings 122 and one inside the outer sleeve coaxial with this core sleeve 126, so that an annular space 130 is formed between the core sleeve 126 and the outer sleeve 120.
  • Outer sleeve 120 and core sleeve 126 are made of an air-impermeable material.
  • the core space 124 can be completely filled with filter material or, not shown here, only partially or not at all.
  • Tobacco section 112 and filter mouthpiece 118 are connected to one another by a wrapping sheet 116.
  • perforations 117 are provided in the wrapping sheet 116, which enable air to be supplied via the perforations 122.
  • the core space 124 designed as a filter element can be a strand of conventional filter material that is circular in cross section. Since the core sleeve 126 is connected to the outer sleeve 120 via spacers 134 and has sufficient stability due to the choice of material, it is not necessary to additionally solidify the filter material.
  • the spacers can be point-shaped or rod-shaped or even flat; they can be arranged either axially parallel or helically on the air-impermeable core sleeve 126 in any manner and connected to the outer sleeve 120.
  • the filter material 124a filling the coaxial core space is a strand with a polygonal cross-section and concavely drawn-in ring surfaces, the corner regions 134a of which are connected to the outer sleeve 126 as spacers.
  • the wrapping sheet 116 is not shown for simplicity.
  • the filter element consisting of the outer sleeve and the core sleeve can be produced in one operation by extruding an extrudable plastic material with simultaneous introduction of the strand-shaped filter material.
  • the end face 128 of the annular space 130 is also impermeable to air; it can preferably be adapted or molded onto the core sleeve 126 by squeezing or molding the outer sleeve 120, which acts as an air-impermeable layer, which can be carried out without difficulty shortly after extrusion because of the still soft material.
  • the perforations can be made in the outer sleeve 120 and in the wrapping sheet 116 in any manner, for example mechanically or by means of a laser.
  • the filter material in the annular space can be any material, preferably cellulose acetate solidified with triacetin, but because of the mechanical strength or elasticity of the filter element consisting of core sleeve and outer sleeve, other, less strong filter materials can also be used with advantage.
  • FIG. 4 shows in section the molding of the outer sleeve on the tobacco-side end area of the filter part, the molding taking place both in the area of the web-shaped spacers 134 and at the end of the core sleeve 126.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Description

Die Erfindung betrifft eine Cigarette mit einstükkigem ventiliertem Filtermundstück, bei dem durch Perforationen einer das Außenmundstück umschließenden, im wesentlichen luftundurchlässigen Außenhülle eintretende Beiluft und der Rauch in achsparallelen Strömen getrennt voneinander bis an das mundseitige Ende des Filtermundstückes geführt und erst im Mund des Rauchers vermischt werden, wie sie gemäß Oberbegriff des Hauptanspruchs weiter definiert ist.The invention relates to a cigarette with a one-piece ventilated filter mouthpiece, in which perforations of a substantially air-impermeable outer casing surrounding the outer mouthpiece and the smoke are conducted in axially parallel streams separately from one another to the mouth-side end of the filter mouthpiece and are only mixed in the mouth of the smoker. as further defined according to the preamble of the main claim.

Eine Cigarette mit einem derartigen Filtermundstück ist beispielsweise aus der DE-C-16 57 261 und DE-B-1936429 bekannt; dieses Belüftungsmundstück besteht aus einem einteiligen zylindrischen Kunststoffkörper, der zusammen mit dem Filter - bzw. Cigarettenende von einer Außenumhüllung umschlossen ist, die Lufteintrittsöffnungen für Luftzufuhrkanäle aufweist, die an dem Außenbereich des zylindrischen Körpers in Längsrichtung vorgesehen sind.A cigarette with such a filter mouthpiece is known for example from DE-C-16 57 261 and DE-B-1936429; This ventilation mouthpiece consists of a one-piece cylindrical plastic body which, together with the filter or cigarette end, is enclosed by an outer casing which has air inlet openings for air supply ducts which are provided on the outer region of the cylindrical body in the longitudinal direction.

Ferner sind gemäß DE-A-28 49 904 und DE-A-3011959 Cigaretten mit ventiliertem Filtermundstück bekannt, bei denen ebenfalls Beiluft und Rauch in achsparallelen Strömen getrennt geführt und erst im Mund des Rauchers vermischt werden; bei diesen Filtern ist eine rohrförmige Hülle oder luftundurchlässige Schicht aus einem Thermoplast wie Polyethylen vorgesehen, in deren Innerem sich Filtermaterial befindet, während an der Außenfläche der Hülle sich in Längsrichtung erstreckende konkav geformte Rillen vorgesehen sind; ferner ist eine Hüllfolie vorhanden, die die Außenfläche der rohrförmigen Hülle umgibt und letztere mit dem Tabakstrang verbindet, wobei die Hüllfolie Perforation im Bereich der durch die konkaven Rippen gebildeten Kanäle aufweist, die die Beiluft zuführen.Furthermore, according to DE-A-28 49 904 and DE-A-3011959 cigarettes with ventilated filter mouthpiece are known, in which the supply air and smoke are also conducted separately in parallel streams and are only mixed in the smoker's mouth; these filters have a tubular sheath or air-impermeable layer made of a thermoplastic such as polyethylene, inside which there is filter material, while on the outer surface of the sheath there are concavely shaped grooves extending in the longitudinal direction; there is also a wrapping film which surrounds the outer surface of the tubular casing and connects the latter to the tobacco rod, the wrapping film having perforations in the region of the channels formed by the concave ribs which supply the additional air.

Bei allen diesen bekannten Cigaretten mit ventiliertem Mundstück wird gefilterter Rauch als innerer Hauptstrom, der von über Einzelkanäle zugeführten Beiluftströmen umgeben ist, getrennt geführt und im Mund des Rauchers wirbelnd vermischt.In all of these known cigarettes with a ventilated mouthpiece, filtered smoke is conducted separately as the main internal flow, which is surrounded by supply air flows supplied via individual channels, and mixed in a swirling manner in the smoker's mouth.

Es hat sich gezeigt, daß derartige bekannte Mundstück- oder Filterausbildungen bei einigen AItersgruppen von Rauchern bei verschiedenen Tabakmischungen nicht die erwartete geschmackliche Akzeptanz ergeben, was vermutlich darauf beruht, daß die von kleinen Kanälen zugeführte Beiluft wegen einer zu großen Verwirbelung im Munde den Tabakstrom nicht oder nicht konzentriert genug auf die einzelnen Geschmacksnerven auftreffen lässt.It has been shown that such known mouthpiece or filter designs do not give the expected taste acceptance for some age groups of smokers with different tobacco mixtures, which is presumably due to the fact that the additional air supplied from small channels does not or does not cause the tobacco flow due to excessive mouth swirling not concentrated enough on the individual taste buds.

Ein weiterer Nachteil der bekannten Rillenfilter beruht darauf, daß die luftundurchlässige Außenhülle beim Rauchen durch feuchten Lippendruck des Rauchers oder beim Halten der Cigarette mit den Zähnen durch den Bißdruck in die Beiluft führenden Rillen hineingedrückt wird und diese teilweise oder vollständig verschließt. Dadurch enthält der Tabakrauch mehr Kondensat und Nikotin als bei einer nach DIN 10240 und 10242 mit einer Rauchmaschine mit trockenen Gummilippen gemessenen Bestimmungsmethode, was zu einer Täuschung des Rauchers führen kann.Another disadvantage of the known groove filter is that the air-impermeable outer shell is pressed into the grooves leading to the by-air and partially or completely closes it when smoking due to the wet lip pressure of the smoker or when holding the cigarette with the teeth by the bite pressure. As a result, the tobacco smoke contains more condensate and nicotine than with a determination method measured according to DIN 10240 and 10242 with a smoking machine with dry rubber lips, which can lead to a deception of the smoker.

Letztlich lassen sich Filtermundstücke der bekannten Art nur auf aufwendige Weise und in vielen Fällen nicht kontinuierlich herstellen.Ultimately, filter mouthpieces of the known type can only be produced in a complex manner and in many cases not continuously.

Die Erfindung hat sich die Aufgabe gestellt, eine Cigarette mit einem neuartigen einstückigen ventilierten Filtermundstück vorzuschlagen, bei dem einmal die allgemein gewünschte Ventilation, d.h. die Zufuhr von Beiluft auch beim Rauchen mit feuchten Lippen oder bei Anwendung von Bißdruck gewährleistet wird, und zum anderen die Vermischung von Beiluft und Rauch zwar erst im Mund des Rauchers erfolgt, jedoch jetzt Beiluft und Rauch so geführt werden sollen, daß der Hauptrauchstrom gebündelt und von dem Beiluftstrom quasi laminar rundum ummantelt und nach wie vor getrennt voneinander dem Mund des Rauchers zugeführt und in diesem vermischt wird. Ferner soll es bei vorgegebenem Beiluftgrad ermöglicht werden, daß durch entsprechende Bemessung von Kern- bzw. Ringraum gleichmäßige Strömungsgeschwindigkeiten von Luft- und Rauchstrom erzielbar sind. Letztlich soll gemäß Erfindung eine kontinuierliche oder wirtschaftliche Fertigung der Filterelemente ermöglicht werden, und schliesslich soll auch der Einsatz eines weniger verfestigten Filtermaterials als bisher üblich möglich sein.The object of the invention is to propose a cigarette with a novel one-piece ventilated filter mouthpiece, in which the generally desired ventilation, i.e. the supply of additional air is guaranteed even when smoking with wet lips or when applying bite pressure, and on the other hand the mixing of additional air and smoke takes place only in the smoker's mouth, but now additional air and smoke should be guided in such a way that the main flow of smoke is bundled and encased by the air stream in a quasi-laminar manner and still fed separately to the smoker's mouth and mixed therein. Furthermore, it should be possible with a given degree of additional air that by appropriate dimensioning of the core or annulus uniform flow velocities of air and smoke flow can be achieved. Ultimately, according to the invention, a continuous or economical production of the filter elements is to be made possible, and finally the use of a less solidified filter material than previously customary should also be possible.

Zur Lösung dieser Aufgabe wird daher eine Cigarette mit ventiliertem Filtermundstück der eingangs geschilderten Art vorgeschlagen, welche gemäß Kennzeichen des Anspruchs 1 ausgebildet ist, wobei weitere vorteilhafte Ausführungsformen in den abhängigen Ansprüchen aufgeführt sind.To solve this problem, therefore, a cigarette with a ventilated filter mouthpiece of the type described at the outset is proposed, which is designed in accordance with the characterizing part of claim 1, further advantageous embodiments being set out in the dependent claims.

Durch die erfindungsgemäße Ausbildung des Filtermundstückes mit Kernhülse und Außenhülse und mit einem entsprechenden Querschnittverhältnis von Ringraum und Kernraum wird es ermöglicht, daß der aus dem koaxialen Ringraum in den Mund gelangende Beiluftstrom den vom Kernraum strangförmig geführten Rauchstrom quasi ummantelt in den Mund des Rauchers gelangen läßt. Überraschenderweise hat sich gezeigt, daß der sehr viel dichter geführte Kernstrom trotz beginnender Vermischung erst im Mund des Rauchers eine deutlichere Beeinflussung der Geschmacksnerven durch die so bewirkte Bündelung des Kernstroms ergibt.The inventive design of the filter mouthpiece with core sleeve and outer sleeve and with a corresponding cross-sectional ratio of the annular space and the core space makes it possible that the bypass air stream coming into the mouth from the coaxial annular space allows the smoke flow guided in a stranded manner from the core space to pass into the smoker's mouth in a quasi-encased manner. Surprisingly, it has been shown that the core stream, which is much more densely guided, begins to mix more clearly in the smoker's mouth despite the beginning of mixing, as a result of the bundling of the core stream caused in this way.

Die einstückige Ausbildung von Kernhülse, Außenhülse und Abstandhaltern läßt eine überaus wirtschaftliche und kontinuierliche Fertigung des Filters zu und gibt dem Filtermundstück die genügende Festigkeit, so daß der anstelle der bislang bekannten kleinen Beiluftkanäle nunmehr vorgesehene Ringraum weder durch feuchte Lippen noch durch Bißdruck hinsichtlich der Zufuhr von Beiluft beengt oder verschlossen werden kann. Die nach DIN-Norm mit einer Rauchmaschine mit Gummilippen gemessenen Kondensat- und Nikotinwerte entsprechen auch den tatsächlich im Mund des Rauchers auftretenden Werten.The one-piece design of the core sleeve, outer sleeve and spacers allows an extremely economical and continuous production of the filter and gives the filter mouthpiece the sufficient strength, so that the annular space instead of the previously known small air ducts is now provided neither by wet lips nor by biting pressure with regard to the supply of Air can be restricted or closed. The condensate and nicotine values measured according to the DIN standard with a smoking machine with rubber lips also correspond to the values actually occurring in the smoker's mouth.

Die Stabilität des aus Außenhülse und Kernhülse gebildeten Filters ergibt aufgrund der sich gegenseitig stabilisierenden Teilbereiche eine hohe mechanische Belastbarkeit, die sich nicht nur auf die oben erwähnte ungehinderte Beiluftführung vorteilhaft auswirkt, sondern es auch ermöglicht, daß kein Filtermaterial hoher Packungsdichte eingesetzt werden muß. Während früher das Filtermaterial, welchesThe stability of the filter formed from the outer sleeve and the core sleeve results in the mutually stabilizing partial areas of high mechanical resilience, which not only has an advantageous effect on the above-mentioned unimpeded supply air, but also makes it possible that no filter material of high packing density has to be used. While the filter material used to be

wegen der späteren Verformung, sei es zur Anbringung von rillenförmigen Kanälen oder beim Zusammenquetschen im Übergangsbereich zum tabakseitigen Ende, eine hohe Packungsdichte aufweisen mußte, kann jetzt ein beliebiges, auch lockeres und nachgiebigeres Filtermaterial eingesetzt werden. Anstelle der bislang verwendeten acetylierten Zellulose, die mitTriacetin gehärtetwurde, können jetztauch andere Filtermaterialien ohne Härte oder solche mit geringeren Mengen an Härtern eingesetztwerden.Because of the later deformation, be it for attaching groove-shaped channels or when squeezing together in the transition area to the tobacco-side end, a high packing density had to be used, any, also loose and more flexible filter material can now be used. Instead of the previously used acetylated cellulose, which has been hardened with triacetin, other filter materials without hardness or those with smaller amounts of hardeners can now also be used.

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

  • Figur 1 eine perspektivische Darstellung einer Cigarette mit Filtermundstück mit rauchführendem Kernraum mit Filterelement und einem beiluftführenden Ringraum;
  • Figur 2 einen Längsschnitt durch das Mundstück gemäß Figur 1;
  • Figur 3 eine teilweise, im Bereich des mundseitigen Mundstücksendes geschnittene, perspektivische Darstellung einer abgewandelten Ausbildung des Filterelementes gemäß Figur 1;
  • Figur 4 einen Querschnitt durch den tabakseitigen Endbereich des Filters längs der Ebene 11-11.
In the following the invention will be explained in more detail with reference to drawings; show it:
  • FIG. 1 shows a perspective illustration of a cigarette with a filter mouthpiece with a smoke-guiding core space with a filter element and an annular air-carrying space;
  • FIG. 2 shows a longitudinal section through the mouthpiece according to FIG. 1;
  • FIG. 3 shows a perspective view of a modified design of the filter element according to FIG. 1, partially cut in the area of the mouth end of the mouthpiece;
  • 4 shows a cross section through the tobacco-side end region of the filter along the plane 11-11.

Bei der in Figur 1 und 2 gezeigten Ausführungsform ist der Tabakabschnitt 112 mit einem Tabakstrang 114 und einer Papierhülse 110 in Ausfluchtung mit dem Filtermundstück 118 verbunden. Das Mundstück 118 wird gebildet von einer Außenhülse 120 mit Perforationsöffnungen 122 und einer innerhalb der Außenhülse koaxial zu dieser Kernhülse 126, so daß zwischen Kernhülse 126 und Außenhülse 120 ein Ringraum 130 gebildet wird. Außenhülse 120 und Kernhülse 126 bestehen aus einem luftundurchlässigen Material. Der Kernraum 124 kann vollständig mit Filtermaterial angefüllt oder, hier nicht gezeigt, nur teilweise oder gar nicht mit diesem gefüllt sein. Tabakabschnitt 112 und Filtermundstück 118 werden durch ein Umhüllungsblatt 116 miteinander verbunden. In der Außenhülse 120 befinden sich Perforationen 122, die mit der Außenluft in Verbindung stehen und diese als Beiluft in den Ringraum 130 führen. Analog sind im Umhüllungsblatt 116 Perforationen 117 vorgesehen, die die Luftzufuhr über die Perforationen 122 ermöglichen.In the embodiment shown in FIGS. 1 and 2, the tobacco section 112 is connected with a tobacco rod 114 and a paper sleeve 110 in alignment with the filter mouthpiece 118. The mouthpiece 118 is formed by an outer sleeve 120 with perforation openings 122 and one inside the outer sleeve coaxial with this core sleeve 126, so that an annular space 130 is formed between the core sleeve 126 and the outer sleeve 120. Outer sleeve 120 and core sleeve 126 are made of an air-impermeable material. The core space 124 can be completely filled with filter material or, not shown here, only partially or not at all. Tobacco section 112 and filter mouthpiece 118 are connected to one another by a wrapping sheet 116. There are perforations 122 in the outer sleeve 120, which are connected to the outside air and lead this into the annular space 130 as additional air. Analogously, perforations 117 are provided in the wrapping sheet 116, which enable air to be supplied via the perforations 122.

Der als Filterelement ausgebildete Kernraum 124 kann ein im Querschnitt kreisförmiger Strang aus üblichem Filtermaterial sein. Da die Kernhülse 126 über Abstandshalter 134 mit der Außenhülse 120 verbunden ist und aufgrund der Materialauswahl eine hinreichende Stabilität hat, ist es nicht erforderlich, das Filtermaterial zusätzlich zu verfestigen. Die Abstandshalter können punkt- oder stäbchenförmig oder auch flächenförmig ausgebildet sein; sie können entweder achsparallel oder wendelförmig auf der luftundurchlässigen Kernhülse 126 in beliebiger Weise angeordnet und mit der Außenhülse 120 verbunden sein.The core space 124 designed as a filter element can be a strand of conventional filter material that is circular in cross section. Since the core sleeve 126 is connected to the outer sleeve 120 via spacers 134 and has sufficient stability due to the choice of material, it is not necessary to additionally solidify the filter material. The spacers can be point-shaped or rod-shaped or even flat; they can be arranged either axially parallel or helically on the air-impermeable core sleeve 126 in any manner and connected to the outer sleeve 120.

Bei der in Figur 3 gezeigten Ausführungsform ist das den koaxialen Kernraum ausfüllende Filtermaterial 124a ein im Querschnitt mehreckiger Strang mit konkav eingezogenen Ringflächen, dessen Eckbereiche 134a als Abstandshalter mit der Außenhülse 126 verbunden sind. Das Umhüllungsblatt 116 ist der Einfachheit wegen nicht dargestellt.In the embodiment shown in FIG. 3, the filter material 124a filling the coaxial core space is a strand with a polygonal cross-section and concavely drawn-in ring surfaces, the corner regions 134a of which are connected to the outer sleeve 126 as spacers. The wrapping sheet 116 is not shown for simplicity.

Das aus Außenhülse und Kernhülse bestehende Filterelement kann in einem Arbeitsgang durch Extrudieren eines extrudierfähigen Kunststoffmaterials bei gleichzeitiger Einführung des strangförmigen Filtermaterials hergestellt werden.The filter element consisting of the outer sleeve and the core sleeve can be produced in one operation by extruding an extrudable plastic material with simultaneous introduction of the strand-shaped filter material.

Die Stirnfläche 128 des Ringraums 130 ist ebenfalls luftundurchlässig; sie kann vorzugsweise durch Zusammenquetschen oder Anformen der als luftundurchlässige Schicht wirkenden Außenhülse 120 an die Kernhülse 126 angepaßt oder angeformt werden, was kurz nach dem Extrudieren wegen des noch weichen Materials ohne Schwierigkeiten durchzuführen ist.The end face 128 of the annular space 130 is also impermeable to air; it can preferably be adapted or molded onto the core sleeve 126 by squeezing or molding the outer sleeve 120, which acts as an air-impermeable layer, which can be carried out without difficulty shortly after extrusion because of the still soft material.

Die Anbringung der Perforationen in der Außenhülse 120 und im Umhüllungsblatt 116 kann auf beliebige Weise, beispielsweise mechanisch oder mittels Laser, erfolgen. Das Filtermaterial im Ringraum kann jedes beliebige Material, vorzugsweise mit Triacetin verfestigtes Zelluloseacetat sein, jedoch sind wegen der mechanischen Festigkeit oder Elastizität des aus Kernhülse und Außenhülse bestehenden Filterelementes auch andere, weniger feste Filtermaterialien mit Vorteil einsetzbar.The perforations can be made in the outer sleeve 120 and in the wrapping sheet 116 in any manner, for example mechanically or by means of a laser. The filter material in the annular space can be any material, preferably cellulose acetate solidified with triacetin, but because of the mechanical strength or elasticity of the filter element consisting of core sleeve and outer sleeve, other, less strong filter materials can also be used with advantage.

Figur 4 zeigt im Schnitt die Anformung der Außenhülse am tabakseitigen Endbereich des Filterteils, wobei die Anformung sowohl im Bereich der stegförmigen Abstandshalter 134 als auch am Ende der Kernhülse 126 erfolgt.FIG. 4 shows in section the molding of the outer sleeve on the tobacco-side end area of the filter part, the molding taking place both in the area of the web-shaped spacers 134 and at the end of the core sleeve 126.

Claims (9)

1. Cigarette with a one-piece, ventilated filter tip (118), in which the accompanying air and smoke which enter through perforations in an outer covering which surrounds the tip and is essentially air-tight are passed separately from one another in axially parallel streams to the mouth end of the filter tip and are mixed only in the mouth of the smoker, the filter tip having a coaxial core space (124) filled with filter material and a coaxially and annularly positioned feed for the accompanying air which is separated from this by an air-tight layer, is closed off from the tobacco end and has a flow connection to the perforations of the outer covering, whilst the core space has a flow connection to the smoke-carrying region of the cigarette, characterised in that
a) the feed for the accompanying air passes through an annular space (130) which is interrupted only by spacers (134, 134a) and is formed by a core casing (126) as the air-tight layer surrounding the core space (124) and an outer casing (120) which is provided with perforation openings (122) and, at the tobacco end region of the annular space (130) lies tightly adjacent to the core casing (126) or is shaped onto this,
b) the core casing (126), the outer casing (120) and the spacers (134) are composed of a plastics material produced, preferably extruded, in one piece, and
c) in that the ratio of the cross-sectional area of the annular space (130) to that of the core space (124) is 0.6:1 to 1:1.
2. Cigarette according to claim 1, characterised in that the ratio of the cross-sectional area of the annular space (130) to that of the core space (124) is 0.8:1.
3. Cigarette according to claims 1 and 2, characterised in that the wall thicknesses oft the core casing (126) and the outer casing (120) are in each case 0.1 to 0.5 mm.
4. Cigarette according to claims 1 to 3, characterised in that the core space (124) is only partly filled with filter material and forms either a chamber at the tobacco end or a hollow tip at the mouth end.
5. Cigarette according to claims 1 to 4, characterised in that the core casing (126) has a circular cross-section.
6. Cigarette according to claims 1 to 4, characterised in that the core casing (126') has a polygonal cross-section with preferably concavely drawn-in peripheries.
7. Cigarette according to claim 6, characterised in that the edges of the core casing (126') are constructed as spacers (134a) and connected to the outer casing (120).
8. Cigarette according to claims 1 to 7, characterised in that the spacers (134, 134a) are connected to the outer casing (120) only in places.
9. Cigarette according to claims 1 to 8, characterised in that the outer casing (120) is connected to the tobacco section (112) by means of an enveloping sheet (116) which has perforations (117) at least in the region of the perforation openings (22) of the outer casing (120) or is composed of a material which is permeable to air.
EP84115289A 1983-12-13 1984-12-12 Cigarette with a ventilated mouthpiece of one piece Expired EP0146114B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3345001A DE3345001C2 (en) 1983-12-13 1983-12-13 Cigarette with a ventilated hollow mouthpiece
DE3345001 1983-12-13

Publications (2)

Publication Number Publication Date
EP0146114A1 EP0146114A1 (en) 1985-06-26
EP0146114B1 true EP0146114B1 (en) 1988-05-11

Family

ID=6216791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115289A Expired EP0146114B1 (en) 1983-12-13 1984-12-12 Cigarette with a ventilated mouthpiece of one piece

Country Status (2)

Country Link
EP (1) EP0146114B1 (en)
DE (1) DE3345001C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5178166A (en) * 1990-09-20 1993-01-12 Philip Morris Incorporated Filter cigarette
RU2138974C1 (en) * 1999-03-12 1999-10-10 Погосян Сейран Амаякович Smoking article
GB2482961B (en) * 2010-08-16 2015-10-07 Allied Global Tobacco Ltd Non-filter Cigarette
GB201608814D0 (en) * 2016-05-19 2016-07-06 British American Tobacco Co Filter rod and apparatus and method for filter rod manufacture
GB201608815D0 (en) * 2016-05-19 2016-07-06 British American Tobacco Co Filter rod and apparatus and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396733A (en) * 1966-03-23 1968-08-13 Lorillard Co P Cigarette tip
US3490461A (en) * 1967-04-20 1970-01-20 Philip Morris Inc Cigarette ventilation
US3579623A (en) * 1968-07-24 1971-05-18 Philip Morris Inc Forming filled continuous plastic rod such as plastic cigarette filter rod filled with a tow of cellulose acetate
US3789855A (en) * 1971-06-22 1974-02-05 Liggett & Myers Inc High flavor impact, low smoke yield cigarette mouthpiece
US4386618A (en) * 1981-06-29 1983-06-07 Brown & Williamson Tobacco Corporation Cigarette filter
DE3205742C2 (en) * 1982-02-18 1986-07-17 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Cigarette filters

Also Published As

Publication number Publication date
DE3345001A1 (en) 1985-06-20
DE3345001C2 (en) 1986-06-12
EP0146114A1 (en) 1985-06-26

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