EP1106087A2 - Method and apparatus for applying a preferably liquid additive - Google Patents

Method and apparatus for applying a preferably liquid additive Download PDF

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Publication number
EP1106087A2
EP1106087A2 EP00125867A EP00125867A EP1106087A2 EP 1106087 A2 EP1106087 A2 EP 1106087A2 EP 00125867 A EP00125867 A EP 00125867A EP 00125867 A EP00125867 A EP 00125867A EP 1106087 A2 EP1106087 A2 EP 1106087A2
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EP
European Patent Office
Prior art keywords
web
density
actuators
additive
assigned
Prior art date
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Granted
Application number
EP00125867A
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German (de)
French (fr)
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EP1106087A3 (en
EP1106087B1 (en
Inventor
Uwe Marsau
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Koerber Technologies GmbH
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Hauni Maschinenbau GmbH
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Publication of EP1106087A2 publication Critical patent/EP1106087A2/en
Publication of EP1106087A3 publication Critical patent/EP1106087A3/en
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Publication of EP1106087B1 publication Critical patent/EP1106087B1/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
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0295—Process control means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers

Definitions

  • the invention relates to a method for feeding a preferably liquid additive onto a moving web of filter material having spread threads.
  • the invention also relates to a device for supplying a preferably liquid additive to a moving web of filter material having spread threads.
  • filter tow which usually consists of cellulose acetate, is withdrawn and treated as an endless strip from a supply.
  • the filter tow consists of a weave of loosely adhering threads which are pulled apart to form a wide and usually flat web, so that the threads are moved next to one another and essentially in parallel.
  • the web is spread out in a stretching zone which is formed by two pairs of rollers rotating at different peripheral speeds, of which at least one roller is grooved on its surface.
  • the web is an additive, which is usually liquid and z.
  • B. consists of triacetin droplets, supplied in finely divided form. The droplets loosen the threads so that after they are gathered together to form a round strand and covered with a filter paper strip, the threads are permanently bonded to one another in a so-called filter strand machine, that is to say crosslinked.
  • a liquid additive an additive consisting of a finely divided powdery substance can also be used. Processing devices of the prescribed type are described in US Pat. Nos. 5,060,664 and 4,511,420 and GB 2,265,296 A.
  • the amount of tow for example the central region of the web
  • the ratio of filter tow to filter material is no longer constant in all areas, ie there is then an area with too much tow amount per unit area too little additive, e.g. B. triacetin, in an area with too little tow amount per unit area there is too much additive.
  • B. triacetin e.g. B. triacetin
  • the homogeneity of the triacetin application across the width of the web is no longer guaranteed.
  • What is desired, however, is an at least approximately constant quantity ratio across the web width, that is to say transversely to the direction of the web movement.
  • the object on which the invention is based is to improve the constancy of the ratio of additive to filter material.
  • the density is recorded in individual web areas, so that it can be determined where there are any density deviations or density fluctuations.
  • the web density can be detected quickly and sensitively by means of radiation passing through the web, preferably light radiation, the more or less strong attenuation of which is detected by means of photoelectronic detectors is a measure of the more or less high density of the web material.
  • light waves can be used which at least partially emit light in the infrared range on the individual web areas.
  • the web density can be determined by gas, preferably air, passing through the web. The influence of air flows in the individual web areas due to the density of the web material can be detected by suitable pneumatic detectors.
  • the web density can be detected by electrical or electromagnetic fields passing through the web, preferably by high-frequency fields.
  • the influence of the fields in the individual web areas as a result of the density of the web material can be detected by suitable high-frequency detectors.
  • the supply of the additive to the web can be controlled by means of controllable actuators.
  • the actuators assigned to an individual web area are controlled by density measurement signals, which are formed from assigned web areas.
  • the actuators can be formed by valves arranged transversely to the direction of movement of the web. They can be controlled analog or digital depending on the density-dependent measurement signals.
  • metering pumps can be used according to the invention, the pumping powers of which are controlled by the density-dependent measurement signals.
  • the device mentioned at the outset is characterized by a measuring arrangement which measures the density of the web transversely to its direction of movement and which is connected to at least one actuator for supplying the additive to the web.
  • the density measuring arrangement has a plurality of sensors, each of which is assigned to a region of the web and is connected to an actuator.
  • Advantageous transducers according to the invention work with radiation penetrating the web, in particular with light, the spectrum of which can be at least partially in the infrared range. The more or less large attenuation of the light as a result of density fluctuations in the web material in the individual web regions can be detected by suitable detectors emitting photoelectronic density-dependent signals assigned to the web regions.
  • a further possibility of detecting the density in the individual web areas consists, according to a development of the invention, in the use of pneumatic detectors which are assigned to the web areas and which detect air streams passing through the web material and z. B. convert into electrical signals.
  • a further possibility for detecting the density in the individual web areas is the use of high-frequency detectors, which detect the web material by means of high-frequency electrical or electromagnetic fields passing through the web and convert it into electrical signals.
  • the sensors are preferably assigned to actuators arranged downstream of the measuring point.
  • the actuators can be designed as controllable valves (control valves) or controllable metering pumps, which are arranged transversely to the direction of movement of the web.
  • the actuators assigned to the individual web areas are controlled as a function of measurement signals which are emitted by the sensors assigned to the respective web areas.
  • the change in the amount of additive supplied by an actuator to a web area can be continuous, e.g. B. proportional, fluctuate with the density of the web area.
  • a measurement signal can also be digitized; the individual z. B. binary digits of the digital signal corresponding control signals can then digitally working actuators, for. B. valves are supplied.
  • the advantages associated with the invention are that the feed of the additive can be quickly adapted to fluctuations in the web in the direction transverse to the conveying direction of the web, so that the ratio of the amount of web material and additive in the individual web regions is at least approximately constant. The ratio is therefore at least approximately constant for the entire web.
  • a processing device 1 for filter tow has a pair of rollers 2 for the continuous removal of an endless filter tow strip 3, e.g. B. from cellulose acetate, from a bale 4.
  • the filter tow strip 3 passes on its way to the pair of rollers 2, on which it is guided over a deflection roller 6, two air nozzles 7 and 8, which are used to spread and loosen the tissue of the filter tow strip serve.
  • the aforementioned components shown in Figure 1 are omitted.
  • the pair of rollers 2 are followed in the direction of movement of the strip 3 by two further pairs of rollers 9 and 11, between which there is a feed device 12 for feeding an additive in the form of a plasticizer, e.g.
  • the speed of the pair of rollers 2 can be changed via a gear 14, the translation of which can be changed by a controllable adjusting motor 16.
  • the speed ratio between the pairs of rollers 2 and 9 specifies the degree of stretching of the filter tow strip 3, ie the spread web formed by it.
  • the brake rollers 2 are driven. But they can also be designed as drag rollers, which act as brake rollers due to their friction.
  • a measuring arrangement 18 for recording the density values of the spread web 3. It has sensors 19a ... 19e, each assigned to a web area 3a ... 3e and in a row arranged transversely to the longitudinal extent and direction of movement of the web 3 are.
  • the measuring transducers 19a ... 19e of the measuring value arrangement 18 serve to: Measure the density values of the web material in the web areas 3a ... 3e separately, to be able to record inhomogeneities.
  • the sensors 19a ... 19e point Light source 21a .... 21e and photoelectric detectors 22a ... 22e.
  • the 22e emits a signal from the weakening of the light falling on it depends. This light is therefore dependent on the current density of the web strip, d. H. of its volume flow (quantity per unit area). Changes through any influences on the supply of the filter tow strip 3 from the bale 4 the density in a web area or deviates from a specified value, the associated transmitter also shows this undesired operating state his signal.
  • the signals from the sensors 19a ... 19e each become one Signal processing arrangement 23a ... 23e supplied, which process the individual signals, possibly compare with a target value.
  • the output signals of the arrangements 23a ... 23e arrive at actuators 24a ... 24e, which, for. B. by change a flow control of the quantity of the additive supplied allow (e.g.
  • Each transmitter 19a ... 19e controls its assigned one Actuator 24a ... 24e such that this is measured at a lower Density of its passage cross section and thus the supply of the additive from one Reservoir 26 reduces the passage cross section at a greater density and thus the supply increases. In this way, the supply is so Density ratios adjusted that in a web area 3a ... 3e always the same Ratio of filter tow and additive is maintained. The total amount of the additive, a certain length of the web and thus one certain amount of web is supplied remains the same.
  • Actuators 24a ... 24e can be designed as controllable valves 27a ... 27e, their flow rates / time unit controlled by output signals of the sensors 19a ... 19e become.
  • the flow rates can be proportional to the output signals the dependency can also be predetermined by a function.
  • other actuators can also be used, e.g. B. controllable Dosing pumps.
  • Nozzles 31a are located at the outlet of the valves 27a ... 27e ... 31e, through which the additive, e.g. B. triacetin, in finely divided (atomized) form 26a ... 26e of web 3 and applied to the threads thereof.
  • the additive can from the reservoir 26 in the usual manner by means of one or more Pumps, not shown, to the actuators 24 a ... 24 e are promoted.
  • control valves with a continuously adjustable flow rate instead of control valves with a continuously adjustable flow rate also groups of valves not shown for each rail area (possibly with different Flow rates) are provided, which only the operating states Have "on-off" and digitized output signals of the transducers 19a ... 19e can be controlled in such a way that the total flow rates meet the desired values given by the output signals of the sensors correspond.
  • 28 is a further pair of rollers, from which the treated / processed Filter material web 3 an inlet funnel 29 one in the cigarette industry known filter rod machine z. B. of the type KDF of the applicant is fed.
  • FIG. 3 shows a variant of the invention using a measuring arrangement 18 of pneumatic sensors 35a ... 35e for each area 3a ... 3e the filter tow web 3.
  • a pneumatic sensor is shown 35a for a web area 3a (FIG. 2).
  • the air influenced by the train passes through a channel 41a to a transducer 42a, one of the web density dependent pneumatic size of the air is converted into an electrical measurement signal.
  • this signal is then switched on again Actuator 24a ( Figure 1), e.g. B. in the form of a control valve 27a, which its Passage cross-section corresponding to the measured density of the web area 3a, d. H. the density measurement signal.
  • FIG. 4 shows a further variant of the invention with a measuring arrangement 18 below Use of electronic sensors 45a ... 45e for each area 3a ... 3e of the filter tow web 3.
  • An electrical or electromagnetic radio frequency source 46a outputs high-frequency pulses to an electrode arrangement 47a which generate an electric or electromagnetic field.
  • This field is marked by the web 3, in particular influenced by its density.
  • the change of a characteristic The size of the high-frequency field is determined by an evaluation circuit 48a and their output signal, which is dependent on the path density, via a Amplifier 49a an actuator 24a, ( Figure 1), for. B. in the form of a control valve 27a, fed that its passage cross section according to the measured density of the web area 3a, d. H. the density measurement signal.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

The method involves detecting the density of the moving material (3) transverse to its direction of motion and feeding the additive to the material depending on the detected density using control elements driven by density signals for associated areas of material. The density is detected (19a-19e) in individual material areas using light, gas, preferably air, electrical or electromagnetic fields passed through the material. Independent claims are also included for the following: an arrangement for feeding a preferably liquid additive to a moving filter material consisting of expanded fibers.

Description

Die Erfindung betrifft ein Verfahren zum Zuführen eines vorzugsweise flüssigen Zusatzstoffes auf eine bewegte Bahn aus ausgebreitete Fäden aufweisendem Filtermaterial.
Die Erfindung betrifft außerdem eine Vorrichtung zum Zuführen eines vorzugsweise flüssigen Zusatzstoffes auf eine bewegte Bahn aus ausgebreitete Fäden aufweisendem Filtermaterial.
Bei der Herstellung von Filterstäben für die tabakverarbeitende Industrie, die insbesondere an Zigaretten angesetzt werden, um Schadstoffe aus dem Zigarettenrauch zu filtern, wird sogenanntes Filter-Tow, das meist aus Celluloseacetat besteht, als endloser Streifen von einem Vorrat abgezogen und behandelt. Das Filter-Tow besteht aus einem Gewebe aus locker aneinanderhaftenden Fäden, die zur Bildung einer breiten und meist ebenen Bahn auseinandergezogen werden, so dass die Fäden nebeneinander und im wesentlichen parallel bewegt werden. Die Ausbreitung der Bahn erfolgt in einer Reckzone, die von zwei mit unterschiedlichen Umfangsgeschwindigkeiten umlaufenden Walzenpaaren gebildet wird, von denen mindestens eine Walze an ihrer Oberfläche gerillt ist. Nach der Ausbreitung wird der Bahn ein Zusatzstoff, der meist flüssig ist und z. B. aus Triacetin-Tröpfchen besteht, in feinverteilter Form zugeführt. Die Tröpfchen lösen die Fäden an, so dass die Fäden nach ihrer Zusammenraffung zu einem runden Strang und Umhüllung mit einem Filterpapierstreifen in einer sogenannten Filterstrangmaschine dauerhaft miteinander verhaftet, d. h. vernetzt, werden. Anstelle eines flüssigen Zusatzstoffes kann auch ein aus einer feinverteilten pulverförmigen Substanz bestehender Zusatzstoff verwendet werden. Aufbereitungsgeräte der vorgeschriebenen Art sind in den US-Patentschriften 5 060 664 und 4 511 420 sowie der GB 2 265 296 A, beschrieben.The invention relates to a method for feeding a preferably liquid additive onto a moving web of filter material having spread threads.
The invention also relates to a device for supplying a preferably liquid additive to a moving web of filter material having spread threads.
In the manufacture of filter rods for the tobacco processing industry, which are used in particular on cigarettes to filter pollutants from cigarette smoke, so-called filter tow, which usually consists of cellulose acetate, is withdrawn and treated as an endless strip from a supply. The filter tow consists of a weave of loosely adhering threads which are pulled apart to form a wide and usually flat web, so that the threads are moved next to one another and essentially in parallel. The web is spread out in a stretching zone which is formed by two pairs of rollers rotating at different peripheral speeds, of which at least one roller is grooved on its surface. After the spread, the web is an additive, which is usually liquid and z. B. consists of triacetin droplets, supplied in finely divided form. The droplets loosen the threads so that after they are gathered together to form a round strand and covered with a filter paper strip, the threads are permanently bonded to one another in a so-called filter strand machine, that is to say crosslinked. Instead of a liquid additive, an additive consisting of a finely divided powdery substance can also be used. Processing devices of the prescribed type are described in US Pat. Nos. 5,060,664 and 4,511,420 and GB 2,265,296 A.

Bei der Ausbreitung der Fäden des Filter-Tows kann die Tow-Menge, beispielsweise der Mittenbereich der Bahn, mehr Material enthalten als die beiden Randbereiche oder umgekehrt. Wird dann, wie bisher üblich, stets die gleiche Menge an Zusatzstoff jedem Bereich der Bahn zugeführt, dann ist das Mengenverhältnis von Filter-Tow von Filterstoff nicht mehr in allen Bereichen konstant, d. h. in einem Bereich mit zuviel Tow-Menge je Flächeneinheit befindet sich dann zu wenig Zusatzstoff, z. B. Triacetin, in einem Bereich mit zu wenig Tow-Menge je Flächeneinheit befindet sich zuviel Zusatzstoff. Dies bedeutet, dass die Homogenität des Triacetinauftrags über die Breite der Bahn nicht mehr gewährleistet ist. Erwünscht ist aber ein zumindest annähernd konstantes Mengenverhältnis über die Bahnbreite, also quer zur Richtung der Bahnbewegung.
Die der Erfindung zugrundeliegende Aufgabe besteht darin, die Konstanz des Verhältnisses von Zusatzstoff zu Filtermaterial zu verbessern.When the threads of the filter tow spread, the amount of tow, for example the central region of the web, can contain more material than the two edge regions or vice versa. If, as usual, the same amount of additive is then fed to each area of the web, the ratio of filter tow to filter material is no longer constant in all areas, ie there is then an area with too much tow amount per unit area too little additive, e.g. B. triacetin, in an area with too little tow amount per unit area there is too much additive. This means that the homogeneity of the triacetin application across the width of the web is no longer guaranteed. What is desired, however, is an at least approximately constant quantity ratio across the web width, that is to say transversely to the direction of the web movement.
The object on which the invention is based is to improve the constancy of the ratio of additive to filter material.

Gemäß der Erfindung wird dies dadurch erreicht, dass die Dichte der Bahn quer zu ihrer Bewegungsrichtung erfasst wird, und dass die Zufuhr des Zusatzstoffes zu der Bahn in Abhängigkeit von der Dichte erfolgt. According to the invention this is achieved in that the density of the web is transverse to their direction of movement is detected, and that the supply of the additive to the Path takes place depending on the density.

Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung wird die Dichte in einzelnen Bahnbereichen erfasst, so dass festgestellt werden kann, wo sich ggf. Dichteabweichungen oder Dichteschwankungen befinden. Die Bahndichte kann schnell und empfindlich mittels die Bahn durchsetzender Strahlung vorzugsweise Lichtstrahlung erfasst werden, deren mehr oder weniger starke mittels fotoelektronischer Detektoren erfasste Schwächung ein Maß für die mehr oder weniger große Dichte des Bahnmaterials ist. Hierzu können Lichtwellen Verwendung finden, die zumindest teilweise Licht im Infrarotbereich auf die einzelnen Bahnbereiche abstrahlen.
Die Bahndichte kann in weiterer Ausbildung der Erfindung durch die Bahn durchsetzendes Gas, vorzugsweise Luft, erfasst werden. Die Beeinflussung von Luftströmen in den einzelnen Bahnbereichen infolge der Dichte des Bahnmaterials kann von geeigneten pneumatischen Detektoren erfasst werden.
Schließlich kann gemäß der Erfindung die Bahndichte durch die Bahn durchsetzende elektrische oder elektromagnetische Felder, vorzugsweise durch Hochfrequenz-Felder, erfasst werden. Die Beeinflussung der Felder in den einzelnen Bahnbereichen infolge der Dichte des Bahnmaterials kann von geeigneten Hochfrequenz-Detektoren erfasst werden.
In weiterer Ausgestaltung der Erfindung kann die Zufuhr des Zusatzstoffes zu der Bahn mittels steuerbarer Stellglieder gesteuert werden. Hierbei werden die jeweils einem einzelnen Bahnbereich zugeordneten Stellglieder durch Dichtemesssignale gesteuert, die aus zugeordneten Bahnbereichen gebildet werden. Die Stellglieder können in Weiterbildung der Erfindung von quer zur Bewegungsrichtung der Bahn angeordneten Ventilen gebildet werden. Sie können analog oder digital in Abhängigkeit von den dichteabhängigen Messsignalen gesteuert werden. Anstelle von Ventilen als Stellglieder können gemäß der Erfindung Dosierpumpen verwendet werden, deren Pumpleistungen von den dichteabhängigen Messsignalen gesteuert werden. According to a particularly advantageous embodiment of the invention, the density is recorded in individual web areas, so that it can be determined where there are any density deviations or density fluctuations. The web density can be detected quickly and sensitively by means of radiation passing through the web, preferably light radiation, the more or less strong attenuation of which is detected by means of photoelectronic detectors is a measure of the more or less high density of the web material. For this purpose, light waves can be used which at least partially emit light in the infrared range on the individual web areas.
In a further embodiment of the invention, the web density can be determined by gas, preferably air, passing through the web. The influence of air flows in the individual web areas due to the density of the web material can be detected by suitable pneumatic detectors.
Finally, according to the invention, the web density can be detected by electrical or electromagnetic fields passing through the web, preferably by high-frequency fields. The influence of the fields in the individual web areas as a result of the density of the web material can be detected by suitable high-frequency detectors.
In a further embodiment of the invention, the supply of the additive to the web can be controlled by means of controllable actuators. In this case, the actuators assigned to an individual web area are controlled by density measurement signals, which are formed from assigned web areas. In a further development of the invention, the actuators can be formed by valves arranged transversely to the direction of movement of the web. They can be controlled analog or digital depending on the density-dependent measurement signals. Instead of valves as actuators, metering pumps can be used according to the invention, the pumping powers of which are controlled by the density-dependent measurement signals.

Die eingangs genannte Vorrichtung ist gekennzeichnet durch eine die Dichte der Bahn quer zu ihrer Bewegungsrichtung erfassende Messanordnung, die mit mindestens einem Stellglied für die Zufuhr des Zusatzstoffes zu der Bahn verbunden ist. In weiterer Ausgestaltung der Vorrichtung gemäß der Erfindung weist die Dichtemessanordnung mehrere Messwertgeber auf, die jeweils einem Bereich der Bahn zugeordnet und mit einem Stellglied verbunden sind. Vorteilhafte Messwertgeber gemäß der Erfindung arbeiten mit die Bahn durchsetzender Strahlung, insbesondere mit Licht, dessen Spektrum zumindest teilweise im Infrarotbereich liegen kann. Die mehr oder weniger große Schwächung des Lichtes infolge Dichteschwankungen des Bahnmaterials in den einzelnen Bahnbereichen kann durch geeignete den Bahnbereichen zugeordnete fotoelektronische dichteabhängige Signale abgebende Detektoren erfasst werden. Eine weitere Möglichkeit der Erfassung der Dichte in den einzelnen Bahnbereichen besteht gemäß einer Weiterbildung der Erfindung im Einsatz von pneumatischen den Bahnbereichen jeweils zugeordneten Detektoren, die das Bahnmaterial durchsetzende Luftströme erfassen und z. B. in elektrische Signale umsetzen. Eine weitere Möglichkeit der Erfassung der Dichte in den einzelnen Bahnbereichen besteht gemäß der Erfindung im Einsatz von Hochfrequenz-Detektoren, die das Bahnmaterial mittels die Bahn durchsetzender hochfrequenter elektrischer oder elektromagnetischer Felder erfassen und in elektrische Signale umsetzen.
Die Messwertgeber sind bevorzugt stromabwärts von der Messstelle angeordneten Stellgliedern zugeordnet. Die Stellglieder können als steuerbare Ventile (Stellventile) oder steuerbare Dosierpumpen ausgebildet sein, die quer zur Bewegungsrichtung der Bahn angeordnet sind. Die Steuerung der den einzelnen Bahnbereichen zugeordneten Stellglieder erfolgt in Abhängigkeit von Messsignalen, die von den den jeweiligen Bahnbereichen zugeordneten Messwertgebern abgegeben werden. Dabei kann die Änderung der Menge des von einem Stellglied einem Bahnbereich zugeführten Zusatzstoffes kontinuierlich, z. B. proportional, mit der Dichte des Bahnbereiches schwanken. Ein Messsignal kann aber auch digitalisiert werden; den einzelnen z. B. binären Stellen des Digitalsignals entsprechende Steuersignale können dann digital arbeitenden Stellgliedern, z. B. Ventilen, zugeführt werden.
Die mit der Erfindung verbundenen Vorteile bestehen darin, dass die Zufuhr des Zusatzstoffes Schwankungen der Bahn in der Richtung quer zur Förderrichtung der Bahn schnell angepasst werden kann, so dass das Verhältnis der Menge von Bahnmaterial und von Zusatzstoff in den einzelnen Bahnbereichen zumindest annähernd konstant ist. Daher ist das Verhältnis dann auch bei der gesamten Bahn zumindest annähernd konstant. The device mentioned at the outset is characterized by a measuring arrangement which measures the density of the web transversely to its direction of movement and which is connected to at least one actuator for supplying the additive to the web. In a further embodiment of the device according to the invention, the density measuring arrangement has a plurality of sensors, each of which is assigned to a region of the web and is connected to an actuator. Advantageous transducers according to the invention work with radiation penetrating the web, in particular with light, the spectrum of which can be at least partially in the infrared range. The more or less large attenuation of the light as a result of density fluctuations in the web material in the individual web regions can be detected by suitable detectors emitting photoelectronic density-dependent signals assigned to the web regions. A further possibility of detecting the density in the individual web areas consists, according to a development of the invention, in the use of pneumatic detectors which are assigned to the web areas and which detect air streams passing through the web material and z. B. convert into electrical signals. According to the invention, a further possibility for detecting the density in the individual web areas is the use of high-frequency detectors, which detect the web material by means of high-frequency electrical or electromagnetic fields passing through the web and convert it into electrical signals.
The sensors are preferably assigned to actuators arranged downstream of the measuring point. The actuators can be designed as controllable valves (control valves) or controllable metering pumps, which are arranged transversely to the direction of movement of the web. The actuators assigned to the individual web areas are controlled as a function of measurement signals which are emitted by the sensors assigned to the respective web areas. The change in the amount of additive supplied by an actuator to a web area can be continuous, e.g. B. proportional, fluctuate with the density of the web area. A measurement signal can also be digitized; the individual z. B. binary digits of the digital signal corresponding control signals can then digitally working actuators, for. B. valves are supplied.
The advantages associated with the invention are that the feed of the additive can be quickly adapted to fluctuations in the web in the direction transverse to the conveying direction of the web, so that the ratio of the amount of web material and additive in the individual web regions is at least approximately constant. The ratio is therefore at least approximately constant for the entire web.

Die Erfindung wird anhand von Ausführungsbeispielen näher erläutert.The invention is explained in more detail using exemplary embodiments.

Es zeigen

Figur 1
eine Seitenansicht eines Tow-Aufbereitungsgerätes unter Verwendung von fotoelektronischen Messwertgebern gemäß der Erfindung,
Figur 2
eine Draufsicht auf den größten Teil des Tow-Aufbereitungsgerätes gemäß Figur 1,
Figur 3
einen pneumatischen Messwertgeber zur Erfassung von Dichteschwankungen des als ebene Bahn ausgebreiteten und bewegten Tows,
Figur 4
einen Hochfrequenz-Messwertgeber zur Erfassung von Dichteschwankungen des als ebene Bahn ausgebreiteten und bewegten Tows.
Show it
Figure 1
3 shows a side view of a tow processing device using photoelectronic sensors according to the invention,
Figure 2
2 shows a plan view of the major part of the tow processing device according to FIG. 1,
Figure 3
a pneumatic transducer for recording density fluctuations of the tow spread and moved as a flat path,
Figure 4
a high-frequency transducer for recording density fluctuations of the tow spread and moved as a flat track.

In den Figuren 1 und 2 weist ein Aufbereitungsgerät 1 für Filter-Tow ein Walzenpaar 2 zum fortlaufenden Abziehen eines endlosen Filter-Tow-Streifens 3, z. B. aus Celluloseacetat, von einem Ballen 4 auf. Nach der Entnahme von Ballen 4 passiert der Filter-Tow-Streifen 3 auf seinem Weg zum Walzenpaar 2, auf dem er über eine Umlenkrolle 6 geführt ist, zwei Luftdüsen 7 und 8, die zur Ausbreitung und Auflockerung des Gewebes des Filter-Tow-Streifens dienen. In Figur 2 sind die vorgenannten aus Figur 1 ersichtlichen Bauelemente weggelassen.
Dem Walzenpaar 2 folgen in Bewegungsrichtung des Streifens 3 zwei weitere Walzenpaare 9 und 11, zwischen denen sich eine Zufuhrvorrichtung 12 zum Zuführen eines Zusatzstoffes in Form von Weichmacher, z. B. Triacetin, auf den zwischen den Walzenpaaren 9 und 11 als ebene Bahn ausgebreiteten Fäden geführten Filter-Tow-Streifens befindet. Von den einzelnen Walzen der Walzenpaare 9 und 11 mit gleichen Durchmessern ist vorteilhaft jeweils eine Walze an ihrem Umfang mit Nuten versehen (gerillt), während die Gegenwalze eine glatte Oberfläche aus elastischem Material haben kann. Alle Walzenpaare 2, 9 und 11 sind von einem nichtdargestellten Hauptantriebsmotor über ebenfalls nicht dargestellte Riemenantriebe antreibbar, wie z. B. in US-PS 5 060 664 beschrieben. Anstelle eines Hauptantriebsmotors können auch separate Antriebe vorgesehen sein.
Die Drehzahl des Walzenpaares 2 ist kleiner als diejenige des Walzenpaares 9, so dass die Walzenpaare 2 und 9 eine Reckeinrichtung für den Filter-Tow-Streifen bilden. Die Drehzahl des Walzenpaares 2 ist über ein Getriebe 14 veränderbar, dessen Übersetzung durch einen steuerbaren Verstellmotor 16 geändert werden kann. Das Geschwindigkeitsverhältnis zwischen den Walzenpaaren 2 und 9 gibt den Grad der Reckung des Filter-Tow-Streifens 3, d. h. der von diesem gebildeten ausgebreiteten Bahn vor. Im gezeigten Ausführungsbeispiel sind die Bremswalzen 2 angetrieben. Sie können aber auch als Schleppwalzen ausgebildet sein, die aufgrund ihrer Reibung als Bremswalzen wirken. In FIGS. 1 and 2, a processing device 1 for filter tow has a pair of rollers 2 for the continuous removal of an endless filter tow strip 3, e.g. B. from cellulose acetate, from a bale 4. After the bale 4 has been removed, the filter tow strip 3 passes on its way to the pair of rollers 2, on which it is guided over a deflection roller 6, two air nozzles 7 and 8, which are used to spread and loosen the tissue of the filter tow strip serve. In Figure 2, the aforementioned components shown in Figure 1 are omitted.
The pair of rollers 2 are followed in the direction of movement of the strip 3 by two further pairs of rollers 9 and 11, between which there is a feed device 12 for feeding an additive in the form of a plasticizer, e.g. B. triacetin, on the filter-tow strip guided between the roller pairs 9 and 11 as a flat web of threads. Of the individual rollers of the roller pairs 9 and 11 with the same diameters, one roller is advantageously provided with grooves on its circumference (grooved), while the counter roller can have a smooth surface made of elastic material. All pairs of rollers 2, 9 and 11 can be driven by a main drive motor, not shown, via belt drives, also not shown, such as. Described in U.S. Patent No. 5,060,664. Instead of a main drive motor, separate drives can also be provided.
The speed of the pair of rollers 2 is lower than that of the pair of rollers 9, so that the pairs of rollers 2 and 9 form a stretching device for the filter tow strip. The speed of the pair of rollers 2 can be changed via a gear 14, the translation of which can be changed by a controllable adjusting motor 16. The speed ratio between the pairs of rollers 2 and 9 specifies the degree of stretching of the filter tow strip 3, ie the spread web formed by it. In the exemplary embodiment shown, the brake rollers 2 are driven. But they can also be designed as drag rollers, which act as brake rollers due to their friction.

Vor der Auftragzone 17 (bezogen auf die Bewegungsrichtung der Filter-Tow-Bahn 3) und zwischen den Walzenpaaren 2 und 9 befindet sich eine Messanordnung 18 zum Erfassen der Dichtewerte der ausgebreiteten Bahn 3. Sie weist Messwertgeber 19a ...19e auf, die jeweils einem Bahnbereich 3a ...3e zugeordnet und in einer Reihe quer zur Längserstreckung und Bewegungsrichtung der Bahn 3 angeordnet sind. Die Messwertgeber 19a ...19e der Messwertanordnung 18 dienen dazu, die Dichtewerte des Bahnmaterials in den Bahnbereichen 3a ...3e separat zu messen, um Inhomogenitäten erfassen zu können. Die Messwertgeber 19a ...19e weisen Lichtquelle 21a ....21e und fotoelektrische Detektoren 22a ...22e auf. Ein Detektor 22a ...22e gibt ein Signal ab, das von der Schwächung des auf ihn fallenden Lichtes abhängt. Dieses Licht ist somit abhängig von der aktuellen Dichte des Bahnstreifens, d. h. von dessen Mengenstrom (Menge je Flächeneinheit). Ändert sich durch irgendwelche Einflüsse bei der Zufuhr des Filter-Tow-Streifens 3 von dem Ballen 4 die Dichte in einem Bahnbereich oder weicht sie von einem vorgesehenen Wert ab, so zeigt der zugehörige Messwertgeber diesen unerwünschten Betriebszustand mit seinem Signal an. Die Signale der Messwertgeber 19a ...19e werden jeweils einer Signalverarbeitungsanordnung 23a ...23e zugeführt, die die einzelnen Signale aufbereiten, evtl. mit einem Soll-Wert vergleichen. Die Ausgangssignale der Anordnungen 23a ...23e gelangen zu Stellgliedern 24a ...24e, die z. B. durch Änderung ihrer Durchflussquerschnitte eine Mengensteuerung des zugeführten Zusatzstoffes (z. B. Triacetin) erlauben. Jeder Messwertgeber 19a ...19e steuert sein zugeordnetes Stellglied 24a ...24e derart, dass dieses bei einer geringeren gemessenen Dichte seinen Durchlassquerschnitt und damit die Zufuhr des Zusatzstoffes aus einem Vorratsbehälter 26 verringert, bei einer größeren Dichte den Durchlassquerschnitt und damit die Zufuhr vergrößert. Auf diese Weise wird die Zufuhr so an die Dichteverhältnisse angepasst, dass in einem Bahnbereich 3a ...3e stets das gleiche Verhältnis von Filter-Tow und Zusatzstoff aufrechterhalten wird. Die Gesamtmenge des Zusatzstoffes, der einer bestimmten Länge der Bahn und damit einer bestimmten Bahnmenge zugeführt wird, bleibt dabei gleich. Die Stellglieder 24a ... 24e können als steuerbare Ventile 27a ...27e ausgebildet sein, deren Durchflussmengen/Zeiteinheit von Ausgangssignalen der Messwertgeber 19a ...19e gesteuert werden. Die Durchflussmengen können proportional zu den Ausgangssignalen sein, die Abhängigkeit kann aber auch durch eine Funktion vorgegeben sein. Anstelle von Stellventilen lassen sich auch andere Stellglieder einsetzen, z. B. steuerbare Dosierpumpen. Am Ausgang der Ventile 27a ... 27e befinden sich Düsen 31a ...31e, durch die der Zusatzstoff, z. B. Triacetin, in feinverteilter (zerstäubter) Form 26a ...26e der Bahn 3 zugeführt und auf deren Fäden aufgebracht wird. Der Zusatzstoff kann aus dem Vorratsbehälter 26 in üblicher Weise mittels einer oder mehreren nicht dargestellten Pumpen zu den Stellgliedern 24 a ...24e gefördert werden.In front of the application zone 17 (based on the direction of movement of the filter tow web 3) and between the roller pairs 2 and 9 there is a measuring arrangement 18 for recording the density values of the spread web 3. It has sensors 19a ... 19e, each assigned to a web area 3a ... 3e and in a row arranged transversely to the longitudinal extent and direction of movement of the web 3 are. The measuring transducers 19a ... 19e of the measuring value arrangement 18 serve to: Measure the density values of the web material in the web areas 3a ... 3e separately, to be able to record inhomogeneities. The sensors 19a ... 19e point Light source 21a .... 21e and photoelectric detectors 22a ... 22e. A detector 22a ... 22e emits a signal from the weakening of the light falling on it depends. This light is therefore dependent on the current density of the web strip, d. H. of its volume flow (quantity per unit area). Changes through any influences on the supply of the filter tow strip 3 from the bale 4 the density in a web area or deviates from a specified value, the associated transmitter also shows this undesired operating state his signal. The signals from the sensors 19a ... 19e each become one Signal processing arrangement 23a ... 23e supplied, which process the individual signals, possibly compare with a target value. The output signals of the arrangements 23a ... 23e arrive at actuators 24a ... 24e, which, for. B. by change a flow control of the quantity of the additive supplied allow (e.g. triacetin). Each transmitter 19a ... 19e controls its assigned one Actuator 24a ... 24e such that this is measured at a lower Density of its passage cross section and thus the supply of the additive from one Reservoir 26 reduces the passage cross section at a greater density and thus the supply increases. In this way, the supply is so Density ratios adjusted that in a web area 3a ... 3e always the same Ratio of filter tow and additive is maintained. The total amount of the additive, a certain length of the web and thus one certain amount of web is supplied remains the same. Actuators 24a ... 24e can be designed as controllable valves 27a ... 27e, their flow rates / time unit controlled by output signals of the sensors 19a ... 19e become. The flow rates can be proportional to the output signals the dependency can also be predetermined by a function. Instead of of control valves, other actuators can also be used, e.g. B. controllable Dosing pumps. Nozzles 31a are located at the outlet of the valves 27a ... 27e ... 31e, through which the additive, e.g. B. triacetin, in finely divided (atomized) form 26a ... 26e of web 3 and applied to the threads thereof. The additive can from the reservoir 26 in the usual manner by means of one or more Pumps, not shown, to the actuators 24 a ... 24 e are promoted.

Anstelle von Stellventilen mit kontinuierlich verstellbarer Durchflussmenge können auch für jeden Bahnbereich nicht dargestellte Gruppen von Ventilen (evtl. mit unterschiedlichen Durchflussmengen) vorgesehen sein, die nur die Betriebszustände "Ein-Aus" haben und von digitalisierten Ausgangssignalen der Messwertgeber 19a ...19e derart ansteuerbar sind, dass die Gesamt-Durchflussmengen den gewünschten von den Ausgangssignalen der Messwertgeber vorgegeben Werten entsprechen. Mit 28 ist ein weiteres Walzenpaar bezeichnet, von dem aus die behandelte/aufbereitete Filtermaterialbahn 3 einem Einlauftrichter 29 einer in der Zigarettenindustrie bekannten Filterstrangmaschine z. B. vom Typ KDF der Anmelderin zugeführt wird.Instead of control valves with a continuously adjustable flow rate also groups of valves not shown for each rail area (possibly with different Flow rates) are provided, which only the operating states Have "on-off" and digitized output signals of the transducers 19a ... 19e can be controlled in such a way that the total flow rates meet the desired values given by the output signals of the sensors correspond. 28 is a further pair of rollers, from which the treated / processed Filter material web 3 an inlet funnel 29 one in the cigarette industry known filter rod machine z. B. of the type KDF of the applicant is fed.

Figur 3 zeigt eine Variante der Erfindung mit einer Messanordnung 18 unter Verwendung von pneumatischen Messwertgebern 35a ...35e für jeden Bereich 3a ...3e der Filter-Tow-Bahn 3. Gezeigt ist allerdings nur ein pneumatischer Messwertgeber 35a für einen Bahnbereich 3a (Figur 2). Druckluft aus einer Druckluftquelle 36a wird über eine Rohrleitung 37a, eine Drosselanordnung 38a und eine Düse 39a zu der Bahn 3 geleitet, die sie durchsetzt. Die von der Bahn beeinflusste Luft gelangt über einen Kanal 41 a zu einem Messwertumsetzer 42a, der eine von der Bahndichte abhängige pneumatische Größe der Luft in ein elektrisches Messsignal umsetzt. Dieses Signal wird nach Verstärkung in einem Verstärker 40 dann wieder einem Stellglied 24a (Figur 1), z. B. in Form eines Stellventils 27a zugeführt, das seinen Durchlassquerschnitt entsprechend der gemessenen Dichte des Bahnbereichs 3a, d. h. dem Dichtemesssignal, einstellt.FIG. 3 shows a variant of the invention using a measuring arrangement 18 of pneumatic sensors 35a ... 35e for each area 3a ... 3e the filter tow web 3. However, only a pneumatic sensor is shown 35a for a web area 3a (FIG. 2). Compressed air from a compressed air source 36a via a pipeline 37a, a throttle arrangement 38a and a nozzle 39a to the Lane 3, which passes through it. The air influenced by the train passes through a channel 41a to a transducer 42a, one of the web density dependent pneumatic size of the air is converted into an electrical measurement signal. After amplification in an amplifier 40, this signal is then switched on again Actuator 24a (Figure 1), e.g. B. in the form of a control valve 27a, which its Passage cross-section corresponding to the measured density of the web area 3a, d. H. the density measurement signal.

Figur 4 zeigt eine weitere Variante der Erfindung mit einer Messanordnung 18 unter Verwendung von elektronischen Messwertgebern 45a ...45e für jeden Bereich 3a ...3e der Filter-Tow-Bahn 3. Gezeigt ist allerdings nur ein Messwertgeber 45a für einen Bahnbereich 3a (Figur 2). Eine elektrische oder elektomagnetische Hochfrequenzquelle 46a gibt Hochfrequenzimpulse an eine Elektrodenanordnung 47a, die ein elektrisches oder elektromagnetisches Feld erzeugen. Dieses Feld wird durch die Bahn 3, insbesondere von deren Dichte beeinflusst. Die Änderung einer charakteristischen Größe des Hochfrequenz-Feldes wird von einer Auswertschaltung 48a erfasst und deren von der Bahndichte abhängiges Ausgangssignal über einen Verstärker 49 a einem Stellglied 24a, (Figur 1), z. B. in Form eines Stellventils 27a, zugeführt, das seinen Durchlassquerschnitt entsprechend der gemessenen Dichte des Bahnbereichs 3a, d. h. dem Dichtemesssignal, einstellt.FIG. 4 shows a further variant of the invention with a measuring arrangement 18 below Use of electronic sensors 45a ... 45e for each area 3a ... 3e of the filter tow web 3. However, only one sensor 45a is shown for a web area 3a (Figure 2). An electrical or electromagnetic radio frequency source 46a outputs high-frequency pulses to an electrode arrangement 47a which generate an electric or electromagnetic field. This field is marked by the web 3, in particular influenced by its density. The change of a characteristic The size of the high-frequency field is determined by an evaluation circuit 48a and their output signal, which is dependent on the path density, via a Amplifier 49a an actuator 24a, (Figure 1), for. B. in the form of a control valve 27a, fed that its passage cross section according to the measured density of the web area 3a, d. H. the density measurement signal.

Claims (17)

Verfahren zum Zuführen eines vorzugsweise flüssigen Zusatzstoffes auf eine bewegte Bahn aus ausgebreitete Fäden aufweisendem Filtermaterial, dadurch gekennzeichnet, dass die Dichte der Bahn quer zur ihre Bewegungsrichtung erfasst wird und dass die Zufuhr des Zusatzstoffes zu der Bahn in Abhängigkeit von der Dichte erfolgt.Process for feeding a preferably liquid additive onto a moving web of filter material having spread threads, characterized in that that the density of the web is measured perpendicular to its direction of movement and that the supply of the additive to the web is dependent on the Density occurs. Verfahren nach Anspruch 1,dadurch gekennzeichnet, dass die Dichte in einzelnen Bahnbereichen erfasst wird.A method according to claim 1, characterized in that the density in individual Path areas is recorded. Verfahren nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, dass die Dichte mittels die Bahn durchsetzender Strahlung, vorzugsweise Licht, erfasst wird.A method according to claim 1 and / or 2, characterized in that the Density is detected by means of radiation passing through the web, preferably light. Verfahren nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, dass die Dichte mittels die Bahn durchströmenden Gases, vorzugsweise Luft, erfasst wird.A method according to claim 1 and / or 2, characterized in that the Density is detected by means of gas flowing through the web, preferably air. Verfahren nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, dass die Dichte mittels die Bahn durchsetzender elektrischer oder elektromagnetischer Felder erfasst.A method according to claim 1 and / or 2, characterized in that the Density by means of electrical or electromagnetic fields passing through the web detected. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zufuhr des Zusatzstoffes zu der Bahn mittels steuerbarer Stellglieder erfolgt.Method according to one or more of the preceding claims, characterized characterized in that the supply of the additive to the web by means of controllable Actuators are carried out. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die jeweils einem einzelnen Bahnbereich zugeordneten Stellglieder durch Dichtemesssignale gesteuert werden, die aus zugeordneten Bahnbereichen gebildet werden. A method according to claim 6, characterized in that the one Actuators assigned to individual path areas are controlled by density measurement signals that are formed from assigned path areas. Verfahren nach Anspruch 6 und/oder 7, dadurch gekennzeichnet, dass die Stellglieder von quer zur Bewegungsrichtung der Bahn angeordneten Ventilen oder Dosierpumpen gebildet werden.A method according to claim 6 and / or 7, characterized in that the Actuators of valves or arranged transversely to the direction of movement of the web Dosing pumps are formed. Verfahren nach Anspruch 7 und/oder 8, dadurch gekennzeichnet, dass die Stellglieder analog oder digital gesteuert werden.A method according to claim 7 and / or 8, characterized in that the Actuators can be controlled analog or digital. Vorrichtung zum Zuführen eines vorzugsweise flüssigen Zusatzstoffes auf eine bewegt Bahn aus ausgebreitete Fäden aufweisendem Filtermaterial, gekennzeichnet durch eine die Dichte der Bahn (3) quer zu ihrer Bewegungsrichtung erfassende Messanordnung (18), die mit mindestens einem Stellglied (24) für die Zufuhr des Zusatzstoffes zu der Bahn verbunden ist.Device for supplying a preferably liquid additive a moving web of filter material having spread threads, characterized by means of a measuring the density of the web (3) transverse to its direction of movement Measuring arrangement (18) with at least one actuator (24) for the supply of the additive is connected to the web. Vorrichtung nach Anspruch 10, gekennzeichnet durch eine mehrere Messwertgeber (19a ...19e, 35a ...35e, 45a ...45e) aufweisende Dichtemessanordnung (18), die jeweils einem Bereich (3a ...3e) der Bahn (3) zugeordnet und mit einem Stellglied (24a ...24e) verbunden sind.Apparatus according to claim 10, characterized by a plurality of sensors (19a ... 19e, 35a ... 35e, 45a ... 45e) having a density measuring arrangement (18), each assigned to an area (3a ... 3e) of the web (3) and with a Actuator (24a ... 24e) are connected. Vorrichtung nach Anspruch 10 und/oder 11, gekennzeichnet durch Messwertgeber (19a ...19e) zum Erfassen von die Bahn (3a ...3e) durchsetzender Strahlung, vorzugsweise Licht.Apparatus according to claim 10 and / or 11, characterized by measuring sensors (19a ... 19e) for the detection of the web (3a ... 3e) penetrating Radiation, preferably light. Vorrichtung nach Anspruch 10 und/oder 11, gekennzeichnet durch Messwertgeber (35a ...35e) zum Erfassen von die Bahn (3a ...3e) durchströmendem Gas, vorzugsweise Luft.Apparatus according to claim 10 and / or 11, characterized by measuring sensors (35a ... 35e) for detecting the flow flowing through the web (3a ... 3e) Gas, preferably air. Vorrichtung nach Anspruch 10 und /oder 11, gekennzeichnet durch Messwertgeber (45a ...45e) zum Erfassen von die Bahn (3a ...3e) durchsetzenden elektrischen oder elektromagnetischen Feldern.Apparatus according to claim 10 and / or 11, characterized by measuring sensors (45a ... 45e) for the detection of those passing through the web (3a ... 3e) electrical or electromagnetic fields. Vorrichtung nach einem oder mehreren der Ansprüche 10 bis 14, dadurch gekennzeichnet, dass die Messwertgeber stromabwärts von der Messstelle (18) angeordneten Stellgliedern (24a ...24e) zugeordnet sind.Device according to one or more of claims 10 to 14, characterized characterized in that the transducers downstream of the measuring point (18) arranged actuators (24a ... 24e) are assigned. Vorrichtung nach Anspruch 10, 11 und 15, dadurch gekennzeichnet, dass die Stellglieder als steuerbare Ventile (27a ...27e) oder Dosierpumpen ausgebildet sind, die quer zur Bewegungsrichtung der Bahn angeordnet sind.Apparatus according to claim 10, 11 and 15, characterized in that the Actuators are designed as controllable valves (27a ... 27e) or metering pumps, which are arranged transversely to the direction of movement of the web. Vorrichtung nach einem oder mehreren der Ansprüche 10 bis 16, gekennzeichnet durch kontinuierlich oder stufenweise steuerbare Stellglieder.Device according to one or more of claims 10 to 16, characterized through actuators that can be controlled continuously or in stages.
EP00125867A 1999-12-08 2000-11-25 Method and apparatus for applying a preferably liquid additive Expired - Lifetime EP1106087B1 (en)

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JP2005211071A (en) * 2004-01-29 2005-08-11 Hauni Maschinenbau Ag Separate relaxation and spraying of filter tow strip
EP1559333A3 (en) * 2004-01-29 2007-03-21 Hauni Maschinenbau AG Separate relaxation and spraying of a filter tow strip
EP1649764A1 (en) * 2004-10-25 2006-04-26 Hauni Maschinenbau AG Method and device for the production of filters
US8083658B2 (en) 2004-12-03 2011-12-27 Filtrona International Limited Tobacco smoke filter production
EP1886589A1 (en) * 2006-08-11 2008-02-13 G.D. S.p.A A device for the treatment of filter material used in tobacco products
CN101785580A (en) * 2008-11-14 2010-07-28 豪尼机械制造股份公司 The filter tow strip conveying device
EP2186426A1 (en) * 2008-11-14 2010-05-19 Hauni Maschinenbau AG Device for transporting a filter tow strip
CN101785580B (en) * 2008-11-14 2013-12-18 豪尼机械制造股份公司 Device for transporting filter tow strip
EP2238847A1 (en) 2009-04-08 2010-10-13 HAUNI Maschinenbau AG Method for operating a filter rod machine and filter rod machine
JP2010239965A (en) * 2009-04-08 2010-10-28 Hauni Maschinenbau Ag Method for operating machine for continuously producing filter and machine for continuously producing filter
CN106572697A (en) * 2014-07-18 2017-04-19 日本烟草产业株式会社 Apparatus and method for producing cigarette filter
EP3170411A4 (en) * 2014-07-18 2018-03-14 Japan Tobacco, Inc. Apparatus and method for producing cigarette filter
EP3103354A1 (en) * 2015-06-08 2016-12-14 Hauni Maschinenbau GmbH Method, applicator and machine for producing a filter rod in the tobacco processing industry

Also Published As

Publication number Publication date
PL199485B1 (en) 2008-09-30
DE50012563D1 (en) 2006-05-24
EP1106087A3 (en) 2005-05-04
PL344284A1 (en) 2001-06-18
EP1106087B1 (en) 2006-04-12
DE19959034B4 (en) 2008-01-17
DE19959034A1 (en) 2001-06-13
ATE322840T1 (en) 2006-04-15

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