EP0284639A1 - Device for measuring the draw resistance of a tobacco rod - Google Patents

Device for measuring the draw resistance of a tobacco rod Download PDF

Info

Publication number
EP0284639A1
EP0284639A1 EP87104881A EP87104881A EP0284639A1 EP 0284639 A1 EP0284639 A1 EP 0284639A1 EP 87104881 A EP87104881 A EP 87104881A EP 87104881 A EP87104881 A EP 87104881A EP 0284639 A1 EP0284639 A1 EP 0284639A1
Authority
EP
European Patent Office
Prior art keywords
opening
strand
gas
cigarette
line
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
EP87104881A
Other languages
German (de)
French (fr)
Other versions
EP0284639B1 (en
Inventor
Jörn Dr. Ulrich
Friedrich Dr. Weinhold
Meinhard Dipl.-Ing. Meyer
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
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 BAT Cigarettenfabriken GmbH filed Critical BAT Cigarettenfabriken GmbH
Priority to DE8787104881T priority Critical patent/DE3777631D1/en
Priority to EP87104881A priority patent/EP0284639B1/en
Priority to CA000562026A priority patent/CA1322874C/en
Priority to US07/171,343 priority patent/US4811744A/en
Publication of EP0284639A1 publication Critical patent/EP0284639A1/en
Application granted granted Critical
Publication of EP0284639B1 publication Critical patent/EP0284639B1/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
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1871—Devices for regulating the tobacco quantity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S131/00—Tobacco
    • Y10S131/904—Pneumatic means for sensing condition or characteristic

Definitions

  • the invention relates to a device for measuring the tensile resistance of a strand of tobacco fibers of the type specified in the preamble of claim 1.
  • the draw resistance of the cigarette is of great importance, since it can be determined relatively easily from a draw resistance measurement whether a cigarette enables the desired draw volume.
  • the draw volume of a cigarette is in turn determined on the one hand by the smoking habits of the smoker and on the other hand by its draw resistance.
  • a device for measuring the tensile resistance of a strand of filter fibers is known, with which the pressure drop at the Strand is detected in an area where the strand has almost reached its final cross section.
  • the aim is to record the pressure drop at a point behind the smallest cross section of the strand of filter material, because the filter fibers have reached their final position there and can therefore no longer be displaced by the air passing through the strand.
  • the main compression of the strand is carried out by means of a wheel, while the shaping and subsequent compression is carried out by a format finger which is arranged behind the wheel in the direction of movement of the strand.
  • a device for measuring the tensile resistance of a strand of tobacco fibers of the type specified emerges from DE-AS 1 166 069 and has a source for a gas stream passing through the strand and a transducer for determining the pressure loss of the gas stream occurring at the strand with a constant gas volume or of the gas volume passing the line with constant pressure loss.
  • a pump guides the air through the tobacco stream into a defined space of constant volume, which is formed between a trough through which the format tape pulls the tobacco stream and a part opposite it, such as a press shoe or tongue known per se.
  • the continuous measurement of the tensile resistance of a strand of tobacco fibers is possible; the value determined in this way is also specific to the strand of tobacco fibers, so that the tensile resistance determined in this way can be used for process control.
  • the tensile resistance of the rod of tobacco fibers determined in this way does not correlate with the tensile resistance of the finished cigarette, which represents a very important product parameter because it is an essential characteristic for a specific cigarette type.
  • the invention is therefore based on the object of providing a device for measuring the tensile resistance of a strand of tobacco fibers of the type specified, in which the disadvantages mentioned above do not occur.
  • a measuring device is to be proposed, the measured value of which is correlated in a precisely defined manner with the draw resistance of the finished cigarettes produced from the tobacco rod.
  • the advantages achieved with the invention are based on the following mode of operation, which is to be explained using the example of the continuous production of cigarettes:
  • the tobacco stream coming from a distributor is conveyed in an air stream to a perforated suction belt, which creates a continuous tobacco rod.
  • this tobacco rod is brought to its target weight in a weight-controlled machine and conveyed to a transfer point with the aid of the suction belt.
  • the tobacco rod, which is still undensified at this point is taken over by a format tape, which is covered with the cigarette paper.
  • the tobacco rod which has an approximately circular cross section, is continuously compressed from the present diameter of approximately 11 mm to a diameter of approximately 6.8 mm. This compression of the tobacco rod beyond the diameter of the finished cigarette, which is approximately 8 mm, is necessary for the wrapping of the tobacco rod with the cigarette paper beginning at the end of the format finger.
  • This wrapping of the tobacco rod with the cigarette paper takes place by the lateral erection of the format tape, one end of the cigarette paper protruding from this format device and being provided with a layer of glue. In a subsequent heated device, the glued end of the cigarette paper is folded over and glued.
  • the endless strand thus produced, coated with the cigarette paper, passes through a diameter testing device and is then cut to the desired cigarette length.
  • the diameter of the compacted strand is approximately 7.85 mm, which is the same as the diameter of the finished cigarette, but without the double thickness of the cigarette paper.
  • the pulling resistance of the cigarettes can be calculated from the pressure drop in the usual way Tobacco rod are produced.
  • the flow volume is extremely constant, as is necessary for the exact determination of the pressure loss on the line .
  • the nozzle with a critical flow is able to deliver the constant gas volume regardless of the back pressure that may arise.
  • format fingers made of hardened steel are not suitable as a "sensor base” because, on the one hand, the desired design of the opening (s) to be explained becomes problematic, and on the other hand, these format fingers do not withstand the loads that occur.
  • the formation of several openings in the format finger leads to a reduction in the mechanical strength, so that format fingers made of hard metal are used, that is to say alloys of high hardness based on carbides produced by pressing and sintering, as sold, for example, under the trademark "WIDIA" will.
  • the usual pressure transducers which are suitable for measuring gaseous media and have a suitable measuring range, can be used to record the pressure drop on the line.
  • the pressure transducer should be arranged axially to the direction of inflow of the gas flow into the line, so that even short-term density fluctuations of the line, which lead to a change in the pressure drop and generate a pressure wave in the gas flow, can be detected and taken into account.
  • the pressure sensor should be arranged perpendicular to the direction of flow of the gas flow into the strand. It is also possible to set up the pressure sensor outside of the actual machine area.
  • the shape, size and number of openings in the format finger through which the gas flow is applied to the strand depend on the design of the format finger and on the properties of the strand.
  • the edges of the opening do not hinder the smooth, shock-free movement of the strand and also have a favorable influence on the inflow of gas into the strand. This can be achieved if the entry area of the opening in the format finger is designed like a diffuser or a nozzle, in particular of the Venturi or Laval nozzle type.
  • a further influence on the inflow behavior is possible via the corresponding selection of the direction of entry of the gas flow into the line.
  • the flow volume that occurs depends on the one hand on the area of the opening (s) and on the other hand on the properties of the tobacco rod. A small increase in the flow volume can therefore lead to a large drop in pressure. By adjusting the flow volume accordingly, pressure drop values can be obtained which are very well suited for signal amplification, as is sometimes required for regulating the process sequence.
  • FIG. 1 shows the part of a conventional cigarette machine in which the approximately cylindrical tobacco rod, which is transported in the direction of the arrow and has a diameter of approximately 11 mm, is compressed to a diameter of approximately 6.8 mm; the transported tobacco rod lying on a format belt 10 is compressed to the desired diameter by a format finger 12, which has approximately the shape of a hollow half cylinder.
  • the format finger 12 is attached to a vertically arranged, relatively rigid plate 14, which in turn is attached to a horizontal support 16.
  • FIG. 2 shows an embodiment of a device for the continuous measurement of the draw resistance of this tobacco rod, which is provided on the format finger 12; if it is assumed that the tobacco rod has a diameter of 11 mm at the inlet into the format finger 12 and a diameter of 6.8 mm at the outlet, then there is a distance between the format at the point indicated in FIG. 1 (not shown) and format finger 12, which is 7.85 mm. Due to the lateral limitation of the tobacco rod by the format tape 10 covered with cigarette paper and the format finger 12, a plug density results for this location which corresponds to the plug density of the finished cigarette. Such a finished cigarette has a diameter of the tobacco rod of 7.85 mm and a paper thickness of approximately 0.1 mm.
  • the format finger If one now forms the format finger at the point at which the tobacco rod has a diameter of 7.85 mm, it has a through opening 18 through which a gas flow of constant volume flows in the direction of the arrow from a constant pressure 17 via a source Hose or pipe line 20 is supplied with a critical nozzle 19, the flow resistance of the strand results in a pressure drop in the gas stream, which can be determined by a pressure transducer P which is connected to the hose or pipe line 20.
  • Figure 2 shows an embodiment in which the hose or pipe 20 for feeding the gas flow into the opening 18 of the format finger 12 is located on the front of the rigid plate 14 and with a slight deviation from the perpendicular to the format finger 12 and thus runs on the transported tobacco rod, namely at an angle of approximately 80 to 83 ° to the tobacco rod.
  • a slight deviation from the perpendicular to the format finger 12 and thus runs on the transported tobacco rod namely at an angle of approximately 80 to 83 ° to the tobacco rod.
  • it is also possible to work with somewhat larger deviations from the vertical namely with an angle of 70 to 87 °, in particular of 78 to 85 °.
  • the opening 18 can have a circular or elliptical shape as required.
  • the opening 18 should be designed so that on the one hand it does not affect the inflow of the gas flow and also does not interfere with the transport of the tobacco rod. In particular, it is expedient to round off the lower edges of the opening 18 resting on the tobacco rod so as not to disturb the proper transport of the tobacco rod.
  • the entry region of the opening 18 should be designed similar to a diffuser or a nozzle, in particular of the Venturi or Laval nozzle type.
  • the area of the opening 18 in the format finger 12 should have a size of 0.5 to 12 mm2, in particular 0.6 to 2.0 mm2, since the pressure drop deviates greatly with smaller opening areas. Larger areas can lead to disturbances in the inlet area. Good results were achieved with an area of 0.8 mm2.
  • the constant volume of the gas flow can be varied in the range from 4 to 600 ml / s, in particular between 8 and 140 ml / s, without there being any noticeable deviations from the desired correlation with the static tensile resistance measurement.
  • a plurality of openings 18 can be provided in the format finger 12, which makes it possible, for example, to form an average value for the tensile resistance.
  • the tensile resistance can also be determined from the variable volume with a constant pressure drop on the line, the source setting the volume flow so that the pressure drop is kept at a predetermined value.
  • the pressure sensor P must then be replaced by a volume meter.

Landscapes

  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)

Abstract

Eine Vorrichtung zur kontinuierlichen Messung des Zugwiderstandes einer Cigarette weist einen Meßaufnehmer auf, der den Druckabfall eines Gasstroms mit konstantem Volumen erfaßt, wobei dieser Gasstrom am Formatfinger einer Strangmaschine in einen Strange aus Tabakfasern eingeleitet wird. Der von dem Strömungswiderstand dieses Stranges abhängende Meßwert wird kontinuierlich ermittelt und korreliert sehr gut mit der üblichen, statischen Messung des Zugwiderstandes von Cigaretten, also des Tabakstrangs einer Cigarette, so daß diese kontinuierliche Zugwiderstandsmessung während der Cigaretten-Produktion nicht nur die übliche Stichprobenkontrolle ersetzt, sondern auch für die Regelung des Produktionsvorgangs eingesetzt werden kann.A device for the continuous measurement of the draw resistance of a cigarette has a measuring sensor which detects the pressure drop of a gas stream of constant volume, this gas stream being introduced into a rod of tobacco fibers on the format finger of a rod machine. The measured value, which depends on the flow resistance of this strand, is continuously determined and correlates very well with the usual, static measurement of the draw resistance of cigarettes, i.e. the tobacco rod of a cigarette, so that this continuous draw resistance measurement during cigarette production not only replaces the usual random sample check, but also can also be used to control the production process.

Description

Die Erfindung betrifft eine Vorrichtung zur Messung des Zugwiderstandes eines Strangs von Tabakfasern der im Oberbegriff des Anspruchs 1 angege­benen Gattung.The invention relates to a device for measuring the tensile resistance of a strand of tobacco fibers of the type specified in the preamble of claim 1.

Bei der Qualitätskontrolle von Cigaretten kommt dem Zugwiderstand der Ci­garette eine große Bedeutung zu, da sich aus einer Zugwiderstands-Messung auf relativ einfache Weise feststellen läßt, ob eine Cigarette das ge­wünschte Zugvolumen ermöglicht. Das Zugvolumen einer Cigarette wird wieder­um einerseits durch die Abrauchgewohnheiten des Rauchers und andererseits durch ihren Zugwiderstand bestimmt.In the quality control of cigarettes, the draw resistance of the cigarette is of great importance, since it can be determined relatively easily from a draw resistance measurement whether a cigarette enables the desired draw volume. The draw volume of a cigarette is in turn determined on the one hand by the smoking habits of the smoker and on the other hand by its draw resistance.

Um also dem Raucher einer bestimmten Markencigarette immer das gleiche Zug­volumen zu gewährleisten, muß - bei Konstanthaltung des subjektiven Para­ meters, nämlich der Abrauchgewohnheiten dieses Rauchers - der Zugwiderstand auf einem festen Wert gehalten werden.So in order to guarantee the smoker of a certain branded cigarette the same pull volume at all times - if the subjective para is kept constant meters, namely the smoking habits of this smoker - the draft resistance can be kept at a fixed value.

Um die Aufrechterhaltung dieses konstanten Zugwiderstands-Wertes zu gewähr­leisten, werden in Stichprobenkontrollen einzelne Cigaretten aus der lau­fenden Produktion herausgenommen und ihr Zugwiderstand mit einem Gerät be­stimmt, wie es bspw. in dem Artikel "Zur Messung von Abrauch-Parametern mit Hilfe von Meßgrößenumformern", veröffentlicht in "Beiträge zur Tabakfor­schung", Band 6, Heft 1, Juli 1971, beschrieben ist. Dabei wird die Ciga­rette mittels einer Gummilippe an eine Rauchmaschine angeschlossen, die bspw. einen Gasstrom mit konstantem Volumen durch die Cigarette zieht. Ent­sprechend den üblichen Normierungen sollte das konstante Strömungsvolumen an der Austrittsseite 17,5 cm³/sek. betragen.In order to ensure that this constant draft resistance value is maintained, individual cigarettes are removed from ongoing production in random checks and their draft resistance is determined with a device, as published, for example, in the article "For measuring smoke parameters with the aid of transducers" in "Contributions to Tobacco Research", Volume 6, Issue 1, July 1971. The cigarette is connected to a smoking machine by means of a rubber lip which, for example, draws a gas stream with a constant volume through the cigarette. According to the usual norms, the constant flow volume on the outlet side should be 17.5 cm³ / sec. be.

Durch den Strömungswiderstand der Cigarette tritt zwischen der Eintritts­seite und der Austrittsseite des Gasstroms ein Druckabfall auf, der als "Zugwiderstand" bezeichnet wird und mittels eines Druckaufnehmers gemessen werden kann.Due to the flow resistance of the cigarette, a pressure drop occurs between the inlet side and the outlet side of the gas flow, which is referred to as the "pull resistance" and can be measured by means of a pressure sensor.

Als Alternative hierzu ist es im Prinzip auch möglich, bei konstantem Druck­abfall das die Cigarette passierende Gasvolumen zu messen.As an alternative to this, it is in principle also possible to measure the gas volume passing the cigarette with a constant pressure drop.

Diese Geräte sind jedoch nur für die Durchführung von Stichprobenkontrollen geeignet, können also nicht für die laufende, kontinuierliche Messung des Zugwiderstandes aller, bspw. von einer bestimmten Cigarettenmaschine herge­stellten Cigaretten eingesetzt werden, da jede Cigarette einzeln in das Ge­rät eingesetzt und gemessen werden muß. Diese Stichproben können nur in be­stimmten Zeitabständen durchgeführt werden, so daß es im allgemeinen nicht möglich ist, durch entsprechende Regelung des Verfahrensablaufs sofort auf eine festgestellte Änderung des Zugwiderstandes der Cigarette zu reagieren.However, these devices are only suitable for carrying out random checks, and therefore cannot be used for the ongoing, continuous measurement of the draw resistance of all cigarettes, for example those made by a specific cigarette machine, since each cigarette must be inserted and measured individually in the device. These random samples can only be carried out at certain time intervals, so that it is generally not possible to react immediately to a determined change in the draw resistance of the cigarette by appropriate regulation of the process sequence.

Aus der GB-PS 1 588 506 ist eine Vorrichtung zur Messung des Zugwiderstandes eines Strangs von Filterfasern bekannt, mit der der Druckabfall an dem Strang in einem Bereich erfaßt wird, an dem der Strang nahezu seinen end­gültigen Querschnitt erreicht hat. Dabei wird darauf abgestellt, den Druck­abfall an einer Stelle hinter dem kleinsten Querschnitt des Strangs aus Filtermaterial zu erfassen, weil dort die Filterfasern ihre endgültige Lage erreicht haben und deshalb durch die den Strang passierende Luft nicht mehr verschoben werden können. Die Hauptkompression des Strangs erfolgt mittels eines Rades, während die Formgebung und anschließende Kompression durch einen Formatfinger durchgeführt wird, der in Bewegungsrichtung des Strangs hinter dem Rad angeordnet ist.From GB-PS 1 588 506 a device for measuring the tensile resistance of a strand of filter fibers is known, with which the pressure drop at the Strand is detected in an area where the strand has almost reached its final cross section. The aim is to record the pressure drop at a point behind the smallest cross section of the strand of filter material, because the filter fibers have reached their final position there and can therefore no longer be displaced by the air passing through the strand. The main compression of the strand is carried out by means of a wheel, while the shaping and subsequent compression is carried out by a format finger which is arranged behind the wheel in the direction of movement of the strand.

Eine Vorrichtung zur Messung des Zugwiderstandes eines Strangs von Tabak­fasern der angegebenen Gattung geht aus der DE-AS 1 166 069 hervor und weist eine Quelle für einen den Strang passierenden Gasstrom sowie einen Meßwert­aufnehmer für die Ermittlung des am Strang auftretenden Druckverlustes des Gasstroms bei konstantem Gasvolumen oder des den Strang passierenden Gas­volumens bei konstantem Druckverlust auf. Dabei führt eine Pumpe die Luft durch den Tabakstrom hindurch in einen umgrenzten Raum von gleichbleibendem Volumen, der zwischen einem Trog, durch den das Formatband den Tabakstrom hindurchzieht, und einem diesen gegenüberliegenden Teil, etwa einem ansich bekannten Preßschuh oder einer Zunge, gebildet ist.A device for measuring the tensile resistance of a strand of tobacco fibers of the type specified emerges from DE-AS 1 166 069 and has a source for a gas stream passing through the strand and a transducer for determining the pressure loss of the gas stream occurring at the strand with a constant gas volume or of the gas volume passing the line with constant pressure loss. A pump guides the air through the tobacco stream into a defined space of constant volume, which is formed between a trough through which the format tape pulls the tobacco stream and a part opposite it, such as a press shoe or tongue known per se.

Dadurch wird zwar die kontinuierliche Messung des Zugwiderstandes eines Strangs von Tabakfasern möglich; der so ermittelte Wert ist auch spezifisch für den Strang von Tabakfasern, so daß man den so ermittelten Zugwiderstand für die Prozessregelung einsetzen kann.As a result, the continuous measurement of the tensile resistance of a strand of tobacco fibers is possible; the value determined in this way is also specific to the strand of tobacco fibers, so that the tensile resistance determined in this way can be used for process control.

Nachteilig ist jedoch, daß der so ermittelte Zugwiderstand des Strangs von Tabakfasern nicht mit dem Zugwiderstand der fertigen Cigarette korreliert, der einen sehr wesentlichen Produkt-Parameter darstellt, weil er ein wesent­liches Charakteristikum für einen bestimmten Cigarettentyp ist.However, it is disadvantageous that the tensile resistance of the rod of tobacco fibers determined in this way does not correlate with the tensile resistance of the finished cigarette, which represents a very important product parameter because it is an essential characteristic for a specific cigarette type.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Vorrichtung zur Mes­sung des Zugwiderstandes eines Strangs von Tabakfasern der angegebenen Gat­tung zu schaffen, bei der die oben erwähnten Nachteile nicht auftreten.The invention is therefore based on the object of providing a device for measuring the tensile resistance of a strand of tobacco fibers of the type specified, in which the disadvantages mentioned above do not occur.

Insbesondere soll eine Meßvorrichtung vorgeschlagen werden, deren Meßwert in genau definierter Weise mit dem Zugwiderstand der aus dem Tabakstrang hergestellten, fertigen Cigaretten korreliert ist.In particular, a measuring device is to be proposed, the measured value of which is correlated in a precisely defined manner with the draw resistance of the finished cigarettes produced from the tobacco rod.

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 auf folgender Funktions­weise, die am Beispiel der kontinuierlichen Herstellung von Cigaretten er­läutert werden soll: Bei der Cigarettenherstellung wird der aus einem Ver­teiler kommende Tabakstrom in einem Luftstrom zu einem perforierten Saugband befördert, wodurch ein kontinuierlicher Tabakstrang entsteht. An sogenannten "Trimmerscheiben" wird dieser Tabakstrang bei einer gewichtsgeregelten Ma­schine auf sein Soll-Gewicht gebracht und mit Hilfe des Saugbandes zu einer Übergabestelle gefördert. Hier wird der Tabakstrang, der zu diesem Zeitpunkt noch unverdichtet ist, durch ein Formatband übernommen, das mit dem Ciga­retten-Papier belegt ist. In einem nachgeschalteten Formatfinger wird der Tabakstrang, der etwa kreisförmigen Querschnitt hat, kontinuierlich von dem hier vorliegenden Durchmesser von etwa 11 mm auf einen Durchmesser von etwa 6,8 mm verdichtet. Diese Verdichtung des Tabakstrangs über den Durchmesser der fertigen Cigarette hinaus, der etwa 8 mm beträgt, ist für die am Ende des Formatfingers beginnende Umhüllung des Tabakstrangs mit dem Cigaretten-­Papier erforderlich.The advantages achieved with the invention are based on the following mode of operation, which is to be explained using the example of the continuous production of cigarettes: In the production of cigarettes, the tobacco stream coming from a distributor is conveyed in an air stream to a perforated suction belt, which creates a continuous tobacco rod. On so-called "trimmer disks", this tobacco rod is brought to its target weight in a weight-controlled machine and conveyed to a transfer point with the aid of the suction belt. Here the tobacco rod, which is still undensified at this point, is taken over by a format tape, which is covered with the cigarette paper. In a downstream format finger, the tobacco rod, which has an approximately circular cross section, is continuously compressed from the present diameter of approximately 11 mm to a diameter of approximately 6.8 mm. This compression of the tobacco rod beyond the diameter of the finished cigarette, which is approximately 8 mm, is necessary for the wrapping of the tobacco rod with the cigarette paper beginning at the end of the format finger.

Diese Umhüllung des Tabakstrangs mit dem Cigaretten-Papier erfolgt durch die seitliche Aufrichtung des Formatbandes, wobei das eine Ende des Cigaretten-­Papiers aus dieser Format-Einrichtung vorsteht und mit einer Leimschicht versehen wird. In einer anschließenden, beheizten Vorrichtung wird das be­leimte Ende des Cigaretten-Papiers umgelegt und verklebt.This wrapping of the tobacco rod with the cigarette paper takes place by the lateral erection of the format tape, one end of the cigarette paper protruding from this format device and being provided with a layer of glue. In a subsequent heated device, the glued end of the cigarette paper is folded over and glued.

Der so hergestellte, mit dem Cigaretten-Papier umhüllte Endlosstrang durch­läuft eine Durchmesserprüfeinrichtung und wird dann auf die gewünschte Ci­garettenlänge geschnitten.The endless strand thus produced, coated with the cigarette paper, passes through a diameter testing device and is then cut to the desired cigarette length.

An einer Stelle des Formatfingers, deren Lage von der Länge des Format­fingers und seiner Neigung abhängt, beträgt der Durchmesser des verdichte­ten Strangs etwa 7,85 mm, ist also gleich dem Durchmesser der fertigen Ci­garette, jedoch ohne die doppelte Dicke des Cigaretten-Papiers.At one point on the format finger, the position of which depends on the length of the format finger and its inclination, the diameter of the compacted strand is approximately 7.85 mm, which is the same as the diameter of the finished cigarette, but without the double thickness of the cigarette paper.

Durch Untersuchungen wurde nun festgestellt, daß der Druckabfall eines Gas­stroms mit konstantem Volumen, der in den verdichteten Tabakstrangs unter dem Formatfinger an einer Stelle eingeleitet wird, an der der Tabakstrang einen Durchmesser von etwa 7,85 mm hat, sehr exakt mit dem Druckabfall in der fertigen Cigarette korreliert, also ein exaktes, reproduzierbares Maß für den Zugwiderstand der fertigen Cigarette darstellt.It has now been found through investigations that the pressure drop of a gas stream of constant volume, which is introduced into the compressed tobacco rod under the format finger at a point where the tobacco rod has a diameter of about 7.85 mm, is very exact with the pressure drop in the finished cigarette correlated, i.e. represents an exact, reproducible measure of the pull resistance of the finished cigarette.

Beaufschlagt man also bei der Cigarettenherstellung den Tabakstrang an dieser Stelle durch einen Gasstrom mit konstantem Volumen und mißt dabei den am Tabakstrang auftretenden Druckabfall, so läßt sich aus dem Druckabfall in der üblichen Weise der Zugwiderstand der Cigaretten berechnen, die im Ver­laufe der weiteren Verarbeitung aus diesem Tabakstrang herstellt werden.If, in cigarette production, the tobacco rod is acted upon by a gas flow with a constant volume and the pressure drop occurring on the tobacco rod is measured, the pulling resistance of the cigarettes can be calculated from the pressure drop in the usual way Tobacco rod are produced.

Bereits geringe Schwankungen des Zugwiderstandes können also noch während der Produktion sofort erfaßt und bspw. zur Regelung des Verfahrensablaufes herangezogen werden.Even slight fluctuations in the tensile resistance can be detected immediately during production and used, for example, to regulate the process sequence.

Erfolgt die Zuführung des Gasstroms zu der Öffnung im Formatfinger über eine "kritisch durchströmte Düse", also eine Düse, die der Gasstrom mit kriti­scher Geschwindigkeit verläßt, so ergibt sich ein extrem konstantes Strö­mungsvolumen, wie es für die exakte Ermittlung des Druckverlustes am Strang erforderlich ist. Die kritisch durchströmte Düse ist in der Lage, unabhän­gig vom eventuell entstehenden Gegendruck, das konstante Gasvolumen zu lie­fern.If the gas flow is fed to the opening in the format finger via a "critically flowed nozzle", that is to say a nozzle which leaves the gas flow at a critical speed, the flow volume is extremely constant, as is necessary for the exact determination of the pressure loss on the line . The nozzle with a critical flow is able to deliver the constant gas volume regardless of the back pressure that may arise.

Die üblichen, aus gehärtetem Stahl hergestellten Formatfinger sind als "Sensor-Basis" nicht geeignet, da einerseits die noch zu erläuternde, er­wünschte Ausgestaltung der Öffnung (en) problematisch wird, und andererseits diese Formatfinger den auftretenden Belastungen nicht standhalten. Insbeson­ dere die Ausbildung mehrerer Öffnungen in dem Formatfinger führt zu einer Verringerung der mechanischen Festigkeit, so daß Formatfinger aus Hartme­tall verwendet werden, also durch Pressen und Sintern hergestellte Legie­rungen großer Härte auf der Basis von Karbiden, wie sie bspw. unter dem Wa­renzeichen "WIDIA" vertrieben werden.The usual format fingers made of hardened steel are not suitable as a "sensor base" because, on the one hand, the desired design of the opening (s) to be explained becomes problematic, and on the other hand, these format fingers do not withstand the loads that occur. In particular The formation of several openings in the format finger leads to a reduction in the mechanical strength, so that format fingers made of hard metal are used, that is to say alloys of high hardness based on carbides produced by pressing and sintering, as sold, for example, under the trademark "WIDIA" will.

Für die Erfassung des Druckabfalls an dem Strang können die üblichen Druck­aufnehmer eingesetzt werden, die für die Messung von gasförmigen Medien geeignet sind und einen geeigneten Meßbereich haben.The usual pressure transducers, which are suitable for measuring gaseous media and have a suitable measuring range, can be used to record the pressure drop on the line.

Der Druckaufnehmer sollte axial zur Einströmrichtung des Gasstroms in den Strang angeordnet sein, damit auch kurzzeitige Dichte-Schwankungen des Strangs, die zu einer Änderung des Druckabfalls führen und eine Druckwelle im Gasstrom erzeugen, erfaßt und berücksichtig werden können.The pressure transducer should be arranged axially to the direction of inflow of the gas flow into the line, so that even short-term density fluctuations of the line, which lead to a change in the pressure drop and generate a pressure wave in the gas flow, can be detected and taken into account.

Wenn der Zugwiderstand über eine etwas größere Stranglänge ermittelt werden muß, sollte der Druckaufnehmer senkrecht zur Einströmrichtung des Gasstroms in den Strang angeordnet werden. Es ist auch möglich, den Druckaufnehmer außerhalb des eigentlichen Maschinenbereiches aufzubauen.If the tensile resistance has to be determined over a somewhat longer strand length, the pressure sensor should be arranged perpendicular to the direction of flow of the gas flow into the strand. It is also possible to set up the pressure sensor outside of the actual machine area.

Die Form, Größe und Zahl der Öffnungen im Formatfinger, durch die der Strang mit dem Gasstrom beaufschlagt wird, hängen von der Bauform des Format­fingers sowie von den Eigenschaften des Strangs ab.The shape, size and number of openings in the format finger through which the gas flow is applied to the strand depend on the design of the format finger and on the properties of the strand.

Darüberhinaus muß jedoch darauf geachtet werden, daß die Kanten der Öffnung die glatte, stoßfreie Bewegung des Strangs nicht behindern und außerdem das Einströmen des Gases in den Strang günstig beeinflussen. Dies kann erreicht werden, wenn der Eintrittsbereich der Öffnung im Formatfinger ähnlich einem Diffusor oder einer Düse, insbesondere vom Venturi- oder Laval-Düsentyp, ausgebildet ist.In addition, however, care must be taken that the edges of the opening do not hinder the smooth, shock-free movement of the strand and also have a favorable influence on the inflow of gas into the strand. This can be achieved if the entry area of the opening in the format finger is designed like a diffuser or a nozzle, in particular of the Venturi or Laval nozzle type.

Eine weitere Beeinflussung des Einströmverhaltens ist über die entsprechende Auswahl der Eintrittsrichtung des Gasstroms in den Strang möglich.A further influence on the inflow behavior is possible via the corresponding selection of the direction of entry of the gas flow into the line.

Das auftretende Strömungsvolumen hängt einerseits von der Fläche der Öff­nung (en) und andererseits von den Eigenschaften des Tabakstrangs ab. Eine kleine Erhöhung des Strömungsvolumens kann deshalb schon zu einem großen Druckabfall führen. Damit lassen sich durch entsprechende Einstellung des Strömungsvolumens Druckabfall-Werte gewinnen, die sehr gut für eine Signal­verstärkung geeignet sind, wie sie für die Regelung des Verfahrensablaufes manchmal erforderlich ist.The flow volume that occurs depends on the one hand on the area of the opening (s) and on the other hand on the properties of the tobacco rod. A small increase in the flow volume can therefore lead to a large drop in pressure. By adjusting the flow volume accordingly, pressure drop values can be obtained which are very well suited for signal amplification, as is sometimes required for regulating the process sequence.

Im Handel erhältliche Druckaufnehmer liefert den Meßwert für den Druckabfall am Strang direkt als elektrisches Signal, das für die Regelung der Ciga­rettenherstellung unter dem Gesichtspunkt, einen konstanten Zugwiderstand aufrechtzuerhalten, herangezogen werden kann.Commercially available pressure transducers provide the measured value for the pressure drop on the string directly as an electrical signal which can be used for the control of the cigarette production from the point of view of maintaining a constant draw resistance.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Be­zugnahme auf die beiliegenden, schematischen Zeichnungen näher erläutert. Es zeigen

  • Fig. 1 eine perspektivische Ansicht eines Formatfingers und eines Formatbandes einer Cigarettenmaschine, und
  • Fig. 2 eine Seitenansicht einer Ausführungsform einer Vorrichtung zur kontinuierlichen Messung des Zugwiderstandes von Ciga­retten während der Produktion.
The invention is explained in more detail below using exemplary embodiments with reference to the accompanying schematic drawings. Show it
  • 1 is a perspective view of a format finger and a format tape of a cigarette machine, and
  • Fig. 2 is a side view of an embodiment of a device for the continuous measurement of the draw resistance of cigarettes during production.

Figur 1 zeigt den Teil einer herkömmlichen Cigarettenmaschine, in dem der in Richtung des Pfeils antransportierte, etwa zylindrische Tabakstrang, der einen Durchmesser von etwa 11 mm hat, auf den Durchmesser von etwa 6,8 mm verdichtet wird; dabei wird der auf einem Formatband 10 aufliegende, trans­portierte Tabakstrang durch einen Formatfinger 12, der etwa die Form eines hohlen Halbzylinders hat, auf den gewünschten Durchmesser zusammengedrückt.FIG. 1 shows the part of a conventional cigarette machine in which the approximately cylindrical tobacco rod, which is transported in the direction of the arrow and has a diameter of approximately 11 mm, is compressed to a diameter of approximately 6.8 mm; the transported tobacco rod lying on a format belt 10 is compressed to the desired diameter by a format finger 12, which has approximately the shape of a hollow half cylinder.

Wie man in Figur 1 erkennt, ist der Formatfinger 12 an einer senkrecht ange­ordneten, relativ starren Platte 14 befestigt, die wiederum an einem hori­zontalen Träger 16 angebracht ist.As can be seen in Figure 1, the format finger 12 is attached to a vertically arranged, relatively rigid plate 14, which in turn is attached to a horizontal support 16.

Die Figur 2 zeigt eine Ausführungsform einer Vorrichtung zur kontinuierlichen Messung des Zugwiderstandes dieses Tabakstrangs, die an dem Formatfinger 12 vorgesehen ist; geht man davon aus, daß der Tabakstrang am Einlauf in den Formatfinger 12 einen Durchmesser von 11 mm und am Auslauf einen Durchmesser von 6,8 mm hat, so ergibt sich an der in Fig. 1 angedeuteten Stelle ein Abstand zwischen Format (nicht dargestellt) und Formatfinger 12, der 7,85 mm beträgt. Aufgrund der seitlichen Begrenzung des Tabakstrangs durch das mit Cigarettenpapier belegte Formatband 10 und den Formatfinger 12 ergibt sich für diese Stelle eine Stopfdichte, die der Stopfdichte der fertigen Ciga­rette entspricht. Eine solche fertige Cigarette hat einen Durchmesser des Tabakstrangs von 7,85 mm und eine Papierstärke von etwa 0,1 mm.FIG. 2 shows an embodiment of a device for the continuous measurement of the draw resistance of this tobacco rod, which is provided on the format finger 12; if it is assumed that the tobacco rod has a diameter of 11 mm at the inlet into the format finger 12 and a diameter of 6.8 mm at the outlet, then there is a distance between the format at the point indicated in FIG. 1 (not shown) and format finger 12, which is 7.85 mm. Due to the lateral limitation of the tobacco rod by the format tape 10 covered with cigarette paper and the format finger 12, a plug density results for this location which corresponds to the plug density of the finished cigarette. Such a finished cigarette has a diameter of the tobacco rod of 7.85 mm and a paper thickness of approximately 0.1 mm.

Bildet man nun den Formatfinger an der Stelle, an der der Tabakstrang einen Durchmesser von 7,85 mm hat, mit einer durchgehenden Öffnung 18 aus, durch die ein Gasstrom mit konstantem Volumen, der in Richtung des Pfeils von einer Quelle konstanten Drucks 17 über eine Schlauch- bzw. Rohrleitung 20 mit einer kritischen Düse 19 zugeführt wird, so ergibt sich durch den Strömungswiderstand des Strangs ein Druckabfall des Gasstroms, der durch einen an die Schlauch- bzw. Rohrleitung 20 angeschlossen, üblichen Druckaufnehmer P ermittelt werden kann.If one now forms the format finger at the point at which the tobacco rod has a diameter of 7.85 mm, it has a through opening 18 through which a gas flow of constant volume flows in the direction of the arrow from a constant pressure 17 via a source Hose or pipe line 20 is supplied with a critical nozzle 19, the flow resistance of the strand results in a pressure drop in the gas stream, which can be determined by a pressure transducer P which is connected to the hose or pipe line 20.

Figur 2 zeigt eine Ausführungsform, bei der sich die Schlauch- bzw. Rohrlei­tung 20 für die Einspeisung des Gasstroms in die Öffnung 18 des Format­fingers 12 an der Vorderseite der starren Platte 14 befindet und mit einer geringfügigen Abweichung von der Senkrechten auf den Formatfinger 12 und damit auf den transportierten Tabakstrang verläuft, nämlich in einem Winkel von etwa 80 bis 83° zum Tabakstrang. Es kann jedoch auch mit etwas größeren Abweichungen von der Senkrechten gearbeitet werden, nämlich mit einem Winkel von 70 bis 87°, insbesondere von 78 bis 85°.Figure 2 shows an embodiment in which the hose or pipe 20 for feeding the gas flow into the opening 18 of the format finger 12 is located on the front of the rigid plate 14 and with a slight deviation from the perpendicular to the format finger 12 and thus runs on the transported tobacco rod, namely at an angle of approximately 80 to 83 ° to the tobacco rod. However, it is also possible to work with somewhat larger deviations from the vertical, namely with an angle of 70 to 87 °, in particular of 78 to 85 °.

Durch diese leichte Neigung der Zuführrichtung in Bezug auf den Tabakstrang kann die Öffnung 18 je nach Bedarf Kreis- oder Ellipsen-Form erhalten.Due to this slight inclination of the feed direction with respect to the tobacco rod, the opening 18 can have a circular or elliptical shape as required.

Außerdem sollte die Öffnung 18 so ausgelegt sein, daß sie einerseits die Einströmung des Gasstroms nicht beeinflußt und außerdem den Transport des Tabakstrangs nicht stört. Insbesondere ist zweckmäßig, die auf dem Tabak­strang aufliegenden unteren Kanten der Öffnung 18 abzurunden, um den einwandfreien Transport des Tabakstrangs nicht zu stören.In addition, the opening 18 should be designed so that on the one hand it does not affect the inflow of the gas flow and also does not interfere with the transport of the tobacco rod. In particular, it is expedient to round off the lower edges of the opening 18 resting on the tobacco rod so as not to disturb the proper transport of the tobacco rod.

Außerdem sollte der Eintrittsbereich der Öffnung 18 ähnlich einem Diffusor oder einer Düse, insbesondere vom Venturi- oder Laval-Düsen-Typ, ausge­bildet sein.In addition, the entry region of the opening 18 should be designed similar to a diffuser or a nozzle, in particular of the Venturi or Laval nozzle type.

Die Fläche der Öffnung 18 im Formatfinger 12 sollte eine Größe von 0,5 bis 12 mm², insbesondere 0,6 bis 2,0 mm² haben, da bei kleineren Öffnungs­flächen der Druckabfall stark abweicht. Bei größeren Flächen kann es zu Stö­rungen im Einlaufbereich kommen. Gute Ergebnisse wurden mit einer Fläche von 0,8 mm² erreicht.The area of the opening 18 in the format finger 12 should have a size of 0.5 to 12 mm², in particular 0.6 to 2.0 mm², since the pressure drop deviates greatly with smaller opening areas. Larger areas can lead to disturbances in the inlet area. Good results were achieved with an area of 0.8 mm².

Das konstante Volumen des Gasstroms kann im Bereich von 4 bis 600 ml/s, ins­besondere zwischen 8 und 140 ml/s, variiert werden, ohne daß es merkliche Abweichungen zu der angestrebten Korrelation mit der statischen Zugwider­stands-Messung gibt.The constant volume of the gas flow can be varied in the range from 4 to 600 ml / s, in particular between 8 and 140 ml / s, without there being any noticeable deviations from the desired correlation with the static tensile resistance measurement.

Bei Bedarf können mehrere Öffnungen 18 in dem Formatfinger 12 vorgesehen sein, wodurch bspw. die Bildung eines Mittelwertes für den Zugwiderstand möglich ist.If required, a plurality of openings 18 can be provided in the format finger 12, which makes it possible, for example, to form an average value for the tensile resistance.

Und schließlich kann auch noch der Zugwiderstand aus dem variablen Volumen bei konstantem Druckabfall am Strang ermittelt werden, wobei die Quelle den Volumenstrom so einstellt, daß der Druckabfall auf einem vorgegebenen Wert gehalten wird. Der Druckaufnehmer P muß dann durch einen Volumenmesser er­setzt werden.And finally, the tensile resistance can also be determined from the variable volume with a constant pressure drop on the line, the source setting the volume flow so that the pressure drop is kept at a predetermined value. The pressure sensor P must then be replaced by a volume meter.

Mit diesem Sensor ist es möglich, eine Regelung der Cigarettenherstellung auf konstanten Zugwiderstand durchzuführen, und zwar zweckmäßigerweise über das Tabakumsatzgewicht, also über die Regelung der Lage der Timmerscheiben.With this sensor, it is possible to control the cigarette production to constant draw resistance, expediently via the tobacco turnover weight, that is to say via the regulation of the position of the dimmer discs.

Claims (12)

1. Vorrichtung zur Messung des Zugwiderstandes eines Strangs von Tabak­fasern a) mit einer Quelle für einen den Strang passierenden Gasstrom, und b) mit einem Meßwertaufnehmer für die Ermittlung des am Strang auftretenden Druckverlustes des Gasstroms bei konstantem Gasvolumen gekennzeichnet durch die folgenden Merkmale: c) der aus Hartmetall hergestellte Formatfinger (12) einer Strangmaschine für die Herstellung von rauchbaren Artikeln weist an einer Stelle, an der der Durchmesser des Strangs etwa dem Durchmesser des fertigen Ta­bakstrangs entspricht, mindestens eine Öffnung (18) für die Beaufschla­gung des Strangs mit dem Gasstrom auf; und d) die bzw. jede Öffnung (18) ist über eine kritisch durchströmte Düse (19) in der Zuleitung (20) mit der Gasquelle (17) verbunden. 1. Device for measuring the tensile resistance of a strand of tobacco fibers a) with a source for a gas stream passing the line, and b) with a transducer for determining the pressure loss of the gas flow occurring at the line with a constant gas volume characterized by the following features: c) the format finger (12), made of hard metal, of a strand machine for the production of smokable articles has at one point, at which the diameter of the strand approximately corresponds to the diameter of the finished tobacco rod, at least one opening (18) for the application of the gas stream to the rod; and d) the or each opening (18) is connected to the gas source (17) via a nozzle (19) with a critical flow in the feed line (20). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnung (18) Kreis- oder Ellipsen-Form hat.2. Device according to claim 1, characterized in that the opening (18) has a circular or elliptical shape. 3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Kanten der Öffnung (18) strömungsgünstig ausgebildet sind.3. Device according to one of claims 1 or 2, characterized in that the edges of the opening (18) are aerodynamically formed. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Eintritts­bereich der Öffnung (18) als Diffusor oder Düse, insbesondere Venturi- oder Laval-Düse, ausgebildet ist.4. The device according to claim 3, characterized in that the inlet region of the opening (18) is designed as a diffuser or nozzle, in particular a Venturi or Laval nozzle. 5. Vorrichtung nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die den Strang berührenden Kanten der Öffnung (18) abgerundet sind.5. Device according to one of claims 3 or 4, characterized in that the edges of the opening (18) touching the strand are rounded. 6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Gasstrom durch die Öffnung (18) unter einem Winkel von 70° bis 87°, insbesondere 78° bis 85°, auf den Strang trifft.6. Device according to one of claims 1 to 5, characterized in that the gas flow through the opening (18) at an angle of 70 ° to 87 °, in particular 78 ° to 85 °, strikes the strand. 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Druckabfall des Gasstroms mit konstantem Volumen am Strang an der Zulei­tung (20) des Gasstroms aufgenommen wird.7. Device according to one of claims 1 to 6, characterized in that the pressure drop of the gas stream is recorded with a constant volume on the line at the feed line (20) of the gas stream. 8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Druckauf­nehmer (P) axial zur Eintrittsrichtung des Gasstroms in den Strang in der Zuleitung (20) angeordnet ist.8. The device according to claim 7, characterized in that the pressure sensor (P) is arranged axially to the direction of entry of the gas flow into the line in the feed line (20). 9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Formatfinger (12) mehrere Öffnungen (18) aufweist, die durch Gasströme mit unterschiedlichen Volumina beaufschlagt sind.9. Device according to one of claims 1 to 8, characterized in that the format finger (12) has a plurality of openings (18) which are acted upon by gas flows with different volumes. 10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Öffnungen (18) unterschiedliche Form haben.10. The device according to claim 9, characterized in that the openings (18) have different shapes. 11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Fläche einer Öffnung (18) im Formatfinger (12) 0,5 bis 12 mm², insbesondere 0,6 bis 2,0 mm², beträgt.11. Device according to one of claims 1 to 10, characterized in that the area of an opening (18) in the format finger (12) is 0.5 to 12 mm², in particular 0.6 to 2.0 mm². 12. Vorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß bei der Messung des Druckabfalls das konstante Volumen des Gasstroms 4 bis 600 ml/s, insbesondere 8 bis 140 ml/s, beträgt.12. Device according to one of claims 1 to 11, characterized in that when measuring the pressure drop, the constant volume of the gas flow is 4 to 600 ml / s, in particular 8 to 140 ml / s.
EP87104881A 1987-04-02 1987-04-02 Device for measuring the draw resistance of a tobacco rod Expired - Lifetime EP0284639B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787104881T DE3777631D1 (en) 1987-04-02 1987-04-02 DEVICE FOR MEASURING THE TENSION RESISTANCE OF A STRING OF TOBACCO FIBERS.
EP87104881A EP0284639B1 (en) 1987-04-02 1987-04-02 Device for measuring the draw resistance of a tobacco rod
CA000562026A CA1322874C (en) 1987-04-02 1988-03-21 Apparatus for measuring the draw resistance of a rod of tobacco fibres
US07/171,343 US4811744A (en) 1987-04-02 1988-03-21 Apparatus for measuring the draw resistance of a rod of tobacco fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87104881A EP0284639B1 (en) 1987-04-02 1987-04-02 Device for measuring the draw resistance of a tobacco rod

Publications (2)

Publication Number Publication Date
EP0284639A1 true EP0284639A1 (en) 1988-10-05
EP0284639B1 EP0284639B1 (en) 1992-03-18

Family

ID=8196890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104881A Expired - Lifetime EP0284639B1 (en) 1987-04-02 1987-04-02 Device for measuring the draw resistance of a tobacco rod

Country Status (4)

Country Link
US (1) US4811744A (en)
EP (1) EP0284639B1 (en)
CA (1) CA1322874C (en)
DE (1) DE3777631D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU651016B2 (en) * 1991-11-16 1994-07-07 British-American Tobacco Company Limited Improvements relating to measuring cigarette pressure drop
CN110793881A (en) * 2019-11-06 2020-02-14 云南中烟工业有限责任公司 Method for rapidly measuring pressure drop of filter stick in suction process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106018168B (en) * 2016-05-16 2018-07-31 江苏中烟工业有限责任公司 A kind of method of on-line measurement Cigarette Draw Resistance
CN114002120A (en) * 2021-10-14 2022-02-01 浙江中烟工业有限责任公司 Device for measuring temperature of main stream smoke of heated cigarette, suction resistance and interception efficiency of filter tip

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166069B (en) * 1960-06-29 1964-03-19 Molins Machine Co Ltd Cigarette rod machine or the like.
GB982001A (en) * 1961-05-05 1965-02-03 Korber Kurt Improvements relating to the measurement of tobacco quantities
DE1902954A1 (en) * 1969-01-22 1970-08-20 Hauni Werke Koerber & Co Kg Method and device for producing filter rods
DE2332384A1 (en) * 1973-06-26 1975-01-23 Franz Ringlschwendtner Intake finger on strand-cigarette- and similar machines - having a pneumatic air cushion accompanying the tobacco strand
UST941011I4 (en) * 1974-05-06 1975-12-02 Automatic controlled apparatus for producing tobacco smoke filter rods
GB1588506A (en) * 1976-07-02 1981-04-23 Molins Ltd Manufacture of filters for cigarettes

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US941011A (en) * 1902-12-12 1909-11-23 Victor Talking Machine Co Apparatus for recording sound.
US3411513A (en) * 1966-11-18 1968-11-19 Knobel Max Method and apparatus for gauging and controlling firmness in cigarettes and the like
US3921644A (en) * 1967-10-09 1975-11-25 Hauni Werke Koerber & Co Kg Apparatus for determining the firmness of fillers in cigarette rods or the like
GB1251051A (en) * 1967-10-09 1971-10-27
GB1304343A (en) * 1969-01-31 1973-01-24
US4103535A (en) * 1977-08-04 1978-08-01 Philip Morris Incorporated Method and apparatus for examining rod-shaped articles
GB2151024B (en) * 1983-12-10 1987-01-14 British American Tobacco Co Improvements relating to monitoring rod
DE3404635C2 (en) * 1984-02-09 1986-07-03 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Device for the continuous determination of the hardness of a smokable article

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166069B (en) * 1960-06-29 1964-03-19 Molins Machine Co Ltd Cigarette rod machine or the like.
GB982001A (en) * 1961-05-05 1965-02-03 Korber Kurt Improvements relating to the measurement of tobacco quantities
DE1902954A1 (en) * 1969-01-22 1970-08-20 Hauni Werke Koerber & Co Kg Method and device for producing filter rods
DE2332384A1 (en) * 1973-06-26 1975-01-23 Franz Ringlschwendtner Intake finger on strand-cigarette- and similar machines - having a pneumatic air cushion accompanying the tobacco strand
UST941011I4 (en) * 1974-05-06 1975-12-02 Automatic controlled apparatus for producing tobacco smoke filter rods
GB1588506A (en) * 1976-07-02 1981-04-23 Molins Ltd Manufacture of filters for cigarettes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU651016B2 (en) * 1991-11-16 1994-07-07 British-American Tobacco Company Limited Improvements relating to measuring cigarette pressure drop
CN110793881A (en) * 2019-11-06 2020-02-14 云南中烟工业有限责任公司 Method for rapidly measuring pressure drop of filter stick in suction process
CN110793881B (en) * 2019-11-06 2022-07-01 云南中烟工业有限责任公司 Method for rapidly measuring pressure drop of filter stick in suction process

Also Published As

Publication number Publication date
US4811744A (en) 1989-03-14
DE3777631D1 (en) 1992-04-23
CA1322874C (en) 1993-10-12
EP0284639B1 (en) 1992-03-18

Similar Documents

Publication Publication Date Title
EP0626472B2 (en) Device for measuring the thickness of a fibre formation with a sliver guide for guiding the slivers at the entry of the drawing frame
DE19751598A1 (en) Method and device for treating a filter tow strip
DE2440821C3 (en) Cigarette filters and method and apparatus for their manufacture
DE4320317C2 (en) Method and device for producing fiber strands
EP0631136B1 (en) Apparatus for measuring the mass or cross-sectional density of fibre bands and use of the apparatus
DE19528484A1 (en) Device on a line for measuring the thickness of a fiber structure
DE3414247C2 (en) Device for measuring the diameter of rod-shaped or rod-shaped products in the tobacco processing industry
DE1532046B2 (en) Method and device for the production of non-covered continuous strands of filamentary or fibrous material, preferably for tobacco filters
EP1106087B1 (en) Method and apparatus for applying a preferably liquid additive
EP0284639B1 (en) Device for measuring the draw resistance of a tobacco rod
EP1649764B1 (en) Method and device for the production of filters
DE2815025A1 (en) METHOD AND ARRANGEMENT FOR FORMING A FILTER STRAND
EP0284640B1 (en) Device for continuously determining two physical characteristics of the constituents of a smokable product
DE3404635C2 (en) Device for the continuous determination of the hardness of a smokable article
EP1227925B1 (en) Device for determining the operational state of an extruder
DE2003691B2 (en) DEVICE FOR CHECKING THE LEVEL OF CIGARETTES
EP1332682A1 (en) Method and apparatus to measure the diameter of a cigarette rod or of a rod-like article of the tobacco industry
DE3738983C2 (en) Method and device for producing a fiber strand of the tobacco processing industry
DE2728797C2 (en) Device for producing cigarette filters from filter tow
WO1988009492A1 (en) Process and device for determining the soot content of flue gases
EP1247462A2 (en) Method and apparatus for generating an information about the properties of a fibre stream
DE19909040A1 (en) Guide for converging fleece web from draw frame into a single fleece
DE2241774A1 (en) MEASURING ARRANGEMENT FOR DETERMINING THE FILLING POWER OF A TOBACCO ROD
EP1532876A1 (en) Cooling device for a wall for guiding a rod of tobacco processing industry
DE1902954C3 (en) Method and device for manufacturing filter rods

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 GB IT LI NL

17P Request for examination filed

Effective date: 19881103

17Q First examination report despatched

Effective date: 19900718

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

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

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE GB IT LI NL

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3777631

Country of ref document: DE

Date of ref document: 19920423

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

Ref country code: GB

Payment date: 19940317

Year of fee payment: 8

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

Ref country code: DE

Payment date: 19940408

Year of fee payment: 8

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

Ref country code: NL

Payment date: 19940430

Year of fee payment: 8

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

Ref country code: BE

Payment date: 19940506

Year of fee payment: 8

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

Ref country code: CH

Payment date: 19940519

Year of fee payment: 8

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

Ref country code: GB

Effective date: 19950402

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

Ref country code: LI

Effective date: 19950430

Ref country code: CH

Effective date: 19950430

Ref country code: BE

Effective date: 19950430

BERE Be: lapsed

Owner name: BAT CIGARETTEN-FABRIKEN G.M.B.H.

Effective date: 19950430

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

Ref country code: NL

Effective date: 19951101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950402

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19951101

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

Ref country code: DE

Effective date: 19960103

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050402