EP2023750B1 - Method for gluing the wrapping of a continuous strand of filter material - Google Patents

Method for gluing the wrapping of a continuous strand of filter material Download PDF

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Publication number
EP2023750B1
EP2023750B1 EP07724712A EP07724712A EP2023750B1 EP 2023750 B1 EP2023750 B1 EP 2023750B1 EP 07724712 A EP07724712 A EP 07724712A EP 07724712 A EP07724712 A EP 07724712A EP 2023750 B1 EP2023750 B1 EP 2023750B1
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EP
European Patent Office
Prior art keywords
cooling
station
heating
hot melt
shaped block
Prior art date
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Not-in-force
Application number
EP07724712A
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German (de)
French (fr)
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EP2023750A1 (en
Inventor
Michael Riedel
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International Tobacco Machinery BV
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International Tobacco Machinery BV
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Priority to PL07724712T priority Critical patent/PL2023750T3/en
Publication of EP2023750A1 publication Critical patent/EP2023750A1/en
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Publication of EP2023750B1 publication Critical patent/EP2023750B1/en
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    • 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
    • A24C5/26—Drying the seam

Definitions

  • a filter continuous strand is first produced.
  • the filter material (tow acetate) is removed from a reservoir and prepared. In this state, it is guided in a behind a strand forming unit through a transport nozzle to an inlet finger.
  • the acetate strand is brought into a round shape.
  • An endless strip of flat material, especially paper, serves as a wrapper and is wrapped around the acetate strand.
  • the bonding of the paper is usually carried out with a hot glue, which is applied by means of a special heatable nozzle in the direction of the paper web as a thin strip.
  • a hot glue which is applied by means of a special heatable nozzle in the direction of the paper web as a thin strip.
  • the paper strip is slowly brought into its round shape and begins to envelop the filter material. This overlaps the lateral edges of the paper strip.
  • the bonding is carried out by curing the hot glue under a cooling bar, the so-called upper format.
  • it will be overlapping paper pressed together with the glue strip and then cured by a constantly cooled format rail quickly on the shortest route.
  • the strand formation takes place by wrapping the paper web around the filter material.
  • the filter material and the relative speed of the filter material to the heating surface creates friction, which can cause a preheating takes place far above the required temperature, causing the glue liquefied so much that a bond is no longer possible. In this case, production is interrupted.
  • Excessively high friction can result from the fact that the internal pressure of the tow acetate in strand formation assumes a very high value, because a special type of acetate was used or the user produces relatively heavy filter rods.
  • the said difficulty can also occur with conventional filter weights and material specifications, and then when a certain production speed is exceeded and then arise to large amounts of frictional heat.
  • the invention has for its object to provide a device for bonding the wrapping of a continuous strand of filter material in the manufacture of cigarette filters, in which a uniform bonding without diameter variations is achieved.
  • the preheating station is associated with a cooling device which causes cooling of the heating surface when the temperature at the heating surface exceeds a predetermined value.
  • the invention assumes that a certain heating is required for the heating of the hot melt adhesive. Taking into account the strand speed, the heating can be adjusted so that a certain temperature is achieved at the heating surface. If, however, due to the processes described to an increase in temperature, such as excessive frictional heat, the cooling device enters and cools the heated cooling surface so far down that excessive heating of the hot melt adhesive is avoided.
  • the heating surface is assigned at least one temperature sensor whose measured temperature values are assigned to a regulating device
  • the control device adjusts the supply of a coolant as a function of the deviation of the measured temperature values from a temperature setpoint.
  • two or more temperature sensors are used whose values can be averaged. It is known per se to provide a rod-shaped block in the preheating station with a groove in which the endless strand is guided and to which a heating device is assigned.
  • the cooling device is preferably associated with this rod-shaped block. Cooling may be accomplished, for example, by exposing the rod-shaped block to a flow of cooling fluid. This may be, for example, an air or water flow directed against the block.
  • Another embodiment of the invention provides for this purpose that in the rod-shaped block at least one cooling channel is formed, which extends in the longitudinal direction through the rod-shaped block and is connected at intervals via holes with the groove, wherein the cooling channel with a source of cooling fluid under Pressure is connected.
  • the preheated region of the hot melt adhesive can be subjected to more or less cool compressed air when a predetermined temperature value has been exceeded.
  • This makes it possible to set a constant temperature which is ideal for bonding, even over different speed ranges from starting up to the various production speeds.
  • the invention ensures trouble-free operation of the production machine.
  • Filtered acetate is fed according to arrow 10 of a transport nozzle 12, from which the tow strand is fed to an inlet finger 14.
  • a Textilendlosbahn 15 is coated by means of a heated nozzle 16 with a strip of hot melt adhesive.
  • the paper web is slowly brought into a round shape and begins to wrap the filter material to form an endless filter strand, which leaves at 18 the plant shown.
  • the paper web 15 is wrapped around the tow strand, the paper edges overlap, with bonding taking place in the region of a cooling device 20 in which the hot-melt adhesive hardens becomes.
  • the overlapping paper is pressed with the glue strip and cured the hot melt in a constantly cooled format rail.
  • the cooling is done with cold water, which is supplied via a hose 22 and discharged via a hose 24.
  • a preheating station 26 is arranged in front of the cooling device 20, the so-called upper format.
  • Fig. 1 shown components of a system for producing an endless filter strand are known per se.
  • the preheating station includes parts that differ from the prior art. This will be discussed below.
  • the preheating station 26 includes a rod-shaped block 28, which in the FIGS. 2 to 6 is shown in more detail. He has on its underside groove 30. As in Fig. 6 to recognize the strand of filter acetate and Textilumhüllung is guided in the groove. This is indicated at 32.
  • the rod made of metal rod-shaped block 28 includes an axial bore 36 for receiving a heating cartridge, by means of which the surface of the groove 30 is brought to a predetermined temperature.
  • the heated heating surface of the groove 30, the contour of which is adapted to the circular contour of the filter strand heats the hot melt adhesive to the required temperature, so that a bond can take place with subsequent curing in the cooling device 20th
  • cooling channels 38, 40 are formed near the groove 30 in the rod-shaped block 28.
  • the cooling channels 38, 40 are arranged at intervals transverse bores 42 and 44 with the groove 30 and the heating surface in combination. The distances are in the illustration after Fig. 3 to recognize.
  • the cooling channels 38, 40 are connected to a cool air source 46 under pressure, which is adjusted by a regulator 48.
  • the controller 48 is connected to a temperature sensor 50 near the groove 30.
  • the controller 48 compares the measured temperature values with a predetermined stored setpoint value and controls the source 46 accordingly to direct more or less cool air through the cooling channels 38, 40 as the deviation dictates, which cools the heating surface of the fillet 30.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)

Abstract

An apparatus for glueing together the wrap of an endless tow of filter material in the manufacture of cigarette filters, with an application station for hot melt adhesive, in which hot melt adhesive is applied to the flat endless web of the wrap, a wrapping station, in which the endless web is laid around the endless tow of filter material, a pre-heating station, in which the hot melt adhesive on the endless web is pre-heated to a preset temperature, while the wrap is brought into immediate contact with a heating surface in the region where adhesive is applied, and with a cooling station, in which the hot melt adhesive is cured, wherein a cooling apparatus is assigned to the pre-heating station, which causes a cooling of the heating surface when the temperature on the heating surface exceeds a preset value.

Description

Vorrichtung zum Verkleben der Umhüllung eines Endlosstrangs aus Filtermaterial nach dem Oberbegriff des Patentanspruchs 1.Device for bonding the envelope of a continuous strand of filter material according to the preamble of patent claim 1.

Bei der Herstellung von Zigarettenfiltern wird zunächst ein Filter-Endlosstrang hergestellt. Zu diesem Zweck wird das Filtermaterial (Towacetat) aus einem Vorratsbehälter entnommen und aufbereitet. In diesem Zustand wird es in einer dahinter angeordneten strangbildenden Einheit durch eine Transportdüse zu einem Einlauffinger geführt. Der Acetatstrang ist dabei in eine runde Form gebracht. Ein endlos laufender Streifen aus Flachmaterial, insbesondere Papier, dient als Umhüllung und wird um den Acetatstrang herumgelegt.In the production of cigarette filters, a filter continuous strand is first produced. For this purpose, the filter material (tow acetate) is removed from a reservoir and prepared. In this state, it is guided in a behind a strand forming unit through a transport nozzle to an inlet finger. The acetate strand is brought into a round shape. An endless strip of flat material, especially paper, serves as a wrapper and is wrapped around the acetate strand.

Die Verklebung des Papiers erfolgt üblicherweise mit einem Heißleim, der mit Hilfe einer besonderen beheizbaren Düse in Laufrichtung der Papierbahn als dünner Streifen aufgetragen wird. Im Bereich des Einlauffingers wird der Papierstreifen langsam in seine runde Form gebracht und beginnt, das Filtermaterial zu umhüllen. Hierbei überlappen sich die seitlichen Kanten des Papierstreifens. Die Verklebung erfolgt durch Aushärten des Heißleims unter einem Kühlsteg, des sogenannten Oberformats. Hierbei wird das sich überlappende Papier mit dem Leimstreifen aufeinandergepreßt und dann durch eine ständig gekühlte Formatschiene schnell auf kürzester Strecke ausgehärtet.The bonding of the paper is usually carried out with a hot glue, which is applied by means of a special heatable nozzle in the direction of the paper web as a thin strip. In the area of the inlet finger, the paper strip is slowly brought into its round shape and begins to envelop the filter material. This overlaps the lateral edges of the paper strip. The bonding is carried out by curing the hot glue under a cooling bar, the so-called upper format. Here it will be overlapping paper pressed together with the glue strip and then cured by a constantly cooled format rail quickly on the shortest route.

Für eine möglichst gleichmäßige Verklebung und Erzielung eines möglichst konstanten Durchmessers ohne Schwankungen ist wichtig, daß der Heißleim unmittelbar vor der Verklebung in einem konstanten Aggregatzustand ist. Hierfür sorgt eine Vorheizung, die sich unmittelbar vor dem Kühlsteg befindet und mit der die Leimnaht auf eine bestimmte, für die Verklebung optimale Temperatur erwärmt wird. Die Wärmeübertragung findet üblicherweise durch unmittelbaren Kontakt zwischen dem Papier und einer Heizfläche statt.For a uniform as possible bonding and achieving a constant diameter as possible without fluctuations is important that the hot glue immediately before bonding in a constant state of aggregation. This is ensured by a pre-heating, which is located directly in front of the cooling bar and with which the glue seam is heated to a certain temperature, which is optimal for gluing. The heat transfer usually takes place by direct contact between the paper and a heating surface.

In der Vorheizvorrichtung erfolgt gleichzeitig die Strangbildung durch Umhüllung der Papierbahn um das Filtermaterial. Durch ein Zusammenpressen des Filtermaterials und die Relativgeschwindigkeit des Filtermaterials zur Heizfläche entsteht Reibung, die dazu führen kann, daß eine Vorheizung weit oberhalb der benötigten Temperatur stattfindet, wodurch sich der Leim so stark verflüssigt, daß eine Verklebung nicht mehr möglich ist. In diesem Fall wird die Produktion unterbrochen. Eine zu hohe Reibung kann dadurch entstehen, daß der Innendruck des Towacetats bei der Strangbildung einen sehr hohen Wert annimmt, weil eine spezielle Acetatsorte benutzt wurde oder der Anwender relativ schwere Filterstäbe produziert. Die genannte Schwierigkeit kann jedoch auch bei üblichen Filtergewichten und Materialspezifikationen auftreten, und zwar dann, wenn eine bestimmte Produktionsgeschwindigkeit überschritten wird und dann zu große Mengen an Reibungswärme entstehen.In the preheater at the same time the strand formation takes place by wrapping the paper web around the filter material. By compressing the filter material and the relative speed of the filter material to the heating surface creates friction, which can cause a preheating takes place far above the required temperature, causing the glue liquefied so much that a bond is no longer possible. In this case, production is interrupted. Excessively high friction can result from the fact that the internal pressure of the tow acetate in strand formation assumes a very high value, because a special type of acetate was used or the user produces relatively heavy filter rods. However, the said difficulty can also occur with conventional filter weights and material specifications, and then when a certain production speed is exceeded and then arise to large amounts of frictional heat.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Verkleben der Umhüllung eines Endlosstranges aus Filtermaterial bei der Herstellung von Zigarettenfiltern zu schaffen, in der eine gleichmäßige Verklebung ohne Durchmesserschwankungen erzielt wird.The invention has for its object to provide a device for bonding the wrapping of a continuous strand of filter material in the manufacture of cigarette filters, in which a uniform bonding without diameter variations is achieved.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei der erfindungsgemäßen Vorrichtung ist der Vorheizstation eine Kühlvorrichtung zugeordnet, welche eine Kühlung der Heizfläche bewirkt, wenn die Temperatur an der Heizfläche einen vorgegebenen Wert überschreitet.In the apparatus according to the invention, the preheating station is associated with a cooling device which causes cooling of the heating surface when the temperature at the heating surface exceeds a predetermined value.

Die Erfindung geht davon aus, daß für die Erwärmung des Heißklebers eine bestimmte Erwärmung erforderlich ist. Unter Berücksichtigung der Stranggeschwindigkeit kann die Beheizung so eingestellt werden, daß eine bestimmte Temperatur an der Heizfläche erzielt wird. Kommt es jedoch aufgrund der beschriebenen Vorgänge zu einer Erhöhung der Temperatur, etwa durch zu große Reibwärme, tritt die Kühlvorrichtung ein und kühlt die erwärmte Kühlfläche so weit herab, daß eine zu starke Erwärmung des Heißklebers vermieden wird.The invention assumes that a certain heating is required for the heating of the hot melt adhesive. Taking into account the strand speed, the heating can be adjusted so that a certain temperature is achieved at the heating surface. If, however, due to the processes described to an increase in temperature, such as excessive frictional heat, the cooling device enters and cools the heated cooling surface so far down that excessive heating of the hot melt adhesive is avoided.

Vorzugsweise ist der Heizfläche mindestens ein Temperaturfühler zugeordnet, dessen gemessene Temperaturwerte auf eine Regelvorrichtung gegeben werden, wobei die Regelvorrichtung die Zufuhr eines Kühlmittels in Abhängigkeit von der Abweichung der gemessenen Temperaturwerte von einem Temperatursollwert einstellt. Vorzugsweise werden zwei oder mehr Temperaturfühler verwendet, deren Werte gemittelt werden können. Es ist an sich bekannt, in der Vorheizstation einen stabförmigen Block vorzusehen mit einer Hohlkehle, in der der Endlosstrang geführt und dem eine Heizvorrichtung zugeordnet ist. Die Kühlvorrichtung ist vorzugsweise diesem stabförmigen Block zugeordnet. Eine Kühlung kann zum Beispiel dadurch erfolgen, daß der stabförmige Block einer Strömung kühlenden Fluids ausgesetzt wird. Dies kann zum Beispiel eine Luft- oder Wasserströmung sein, die gegen den Block gerichtet ist. Eine andere Ausgestaltung der Erfindung sieht hierzu vor, daß in dem stabförmigen Block mindestens ein Kühlkanal geformt ist, der sich in Längsrichtung durch den stabförmigen Block erstreckt und in Abständen über Bohrungen mit der Hohlkehle verbunden ist, wobei der Kühlkanal mit einer Quelle für kühlendes Fluid unter Druck verbunden ist. Auf diese Weise kann der vorgeheizte Bereich des Heißklebers mit mehr oder weniger kühler Druckluft beaufschlagt werden, wenn ein vorgegebener Temperaturwert überschritten worden ist. Dadurch ist es möglich, auch über unterschiedliche Geschwindigkeitsbereiche vom Anfahren bis zu den verschiedenen Produktionsgeschwindigkeiten eine konstante für die Verklebung ideale Temperatur einzustellen. Außerdem wird mit der Erfindung ein störungsfreier Lauf der Produktionsmaschine sichergestellt.Preferably, the heating surface is assigned at least one temperature sensor whose measured temperature values are assigned to a regulating device The control device adjusts the supply of a coolant as a function of the deviation of the measured temperature values from a temperature setpoint. Preferably, two or more temperature sensors are used whose values can be averaged. It is known per se to provide a rod-shaped block in the preheating station with a groove in which the endless strand is guided and to which a heating device is assigned. The cooling device is preferably associated with this rod-shaped block. Cooling may be accomplished, for example, by exposing the rod-shaped block to a flow of cooling fluid. This may be, for example, an air or water flow directed against the block. Another embodiment of the invention provides for this purpose that in the rod-shaped block at least one cooling channel is formed, which extends in the longitudinal direction through the rod-shaped block and is connected at intervals via holes with the groove, wherein the cooling channel with a source of cooling fluid under Pressure is connected. In this way, the preheated region of the hot melt adhesive can be subjected to more or less cool compressed air when a predetermined temperature value has been exceeded. This makes it possible to set a constant temperature which is ideal for bonding, even over different speed ranges from starting up to the various production speeds. In addition, the invention ensures trouble-free operation of the production machine.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt schematisch eine Vorrichtung zur Herstellung eines Zigaretten- filterstrangs mit einer Vorrichtung nach der Erfindung.
Fig. 2
zeigt einen stabförmigen Block in Seitenansicht für eine Vorrichtung nach der Erfindung.
Fig. 3
zeigt die Untersicht des Blocks nach Fig. 2.
Fig. 4
zeigt die Draufsicht auf die perspektivische Darstellung des Blocks nach Fig. 2.
Fig. 5
zeigt perspektivisch die Unterseite des Blocks nach Fig. 4.
Fig. 6
zeigt einen Schnitt durch die Darstellung nach Fig. 2 entlang der Linie 6-6.
An embodiment of the invention will be explained in more detail with reference to drawings.
Fig. 1
schematically shows an apparatus for producing a cigarette filter strand with a device according to the invention.
Fig. 2
shows a rod-shaped block in side view for a device according to the invention.
Fig. 3
shows the bottom view of the block Fig. 2 ,
Fig. 4
shows the top view of the perspective view of the block Fig. 2 ,
Fig. 5
shows in perspective the bottom of the block Fig. 4 ,
Fig. 6
shows a section through the illustration Fig. 2 along the line 6-6.

Filtertowacetat wird entsprechend Pfeil 10 einer Transportdüse 12 zugeführt, von welcher der Towstrang einem Einlauffinger 14 zugeführt wird. Eine Papierendlosbahn 15 wird mit Hilfe einer beheizbaren Düse 16 mit einem Streifen Heißkleber beschichtet. Im Bereich des Einlauffingers 14 wird die Papierbahn langsam in eine runde Form gebracht und beginnt das Filtermaterial zu umhüllen, um einen Endlosfilterstrang zu bilden, der bei 18 die gezeigt Anlage verläßt. Beim Umhüllen der Papierbahn 15 um den Towstrang überlappen sich die Papierkanten, wobei eine Verklebung im Bereich einer Kühlvorrichtung 20 erfolgt, in der der Heißkleber ausgehärtet wird. Hier wird das sich überlappende Papier mit dem Leimstreifen gepreßt und der Heißkleber in einer ständig gekühlten Formatschiene ausgehärtet. Die Kühlung erfolgt mit kaltem Wasser, welches über einen Schlauch 22 zugeführt und über einen Schlauch 24 abgeführt wird.Filtered acetate is fed according to arrow 10 of a transport nozzle 12, from which the tow strand is fed to an inlet finger 14. A Papierendlosbahn 15 is coated by means of a heated nozzle 16 with a strip of hot melt adhesive. In the region of the inlet finger 14, the paper web is slowly brought into a round shape and begins to wrap the filter material to form an endless filter strand, which leaves at 18 the plant shown. When the paper web 15 is wrapped around the tow strand, the paper edges overlap, with bonding taking place in the region of a cooling device 20 in which the hot-melt adhesive hardens becomes. Here, the overlapping paper is pressed with the glue strip and cured the hot melt in a constantly cooled format rail. The cooling is done with cold water, which is supplied via a hose 22 and discharged via a hose 24.

Vor der Kühlvorrichtung 20, dem sogenannten Oberformat, ist eine Vorheizstation 26 angeordnet.In front of the cooling device 20, the so-called upper format, a preheating station 26 is arranged.

Die in Fig. 1 dargestellten Komponenten einer Anlage zur Herstellung eines Endlosfilterstrangs sind an sich bekannt. Die Vorheizstation enthält jedoch Teile, welche sich vom Stand der Technik unterscheiden. Hierauf wird nachfolgend eingegangen.In the Fig. 1 shown components of a system for producing an endless filter strand are known per se. However, the preheating station includes parts that differ from the prior art. This will be discussed below.

Die Vorheizstation 26 enthält einen stabförmigen Block 28, der in den Figuren 2 bis 6 näher dargestellt ist. Er weist an seiner Unterseite Hohlkehle 30 auf. Wie in Fig. 6 zu erkennen, wird der Strang aus Filteracetat und Papierumhüllung in der Hohlkehle geführt. Dies ist bei 32 angedeutet. Der aus Metall hergestellte stabförmige Block 28 enthält eine axiale Bohrung 36 für die Aufnahme einer Heizpatrone, mit deren Hilfe die Fläche der Hohlkehle 30 auf eine vorgegebene Temperatur gebracht wird. Die erwärmte Heizfläche der Hohlkehle 30, deren Kontur an die Kreiskontur des Filterstrangs angepaßt ist, erwärmt den Heißkleber auf die erforderliche Temperatur, so daß eine Verklebung stattfinden kann mit anschließender Aushärtung in der Kühlvorrichtung 20.The preheating station 26 includes a rod-shaped block 28, which in the FIGS. 2 to 6 is shown in more detail. He has on its underside groove 30. As in Fig. 6 to recognize the strand of filter acetate and Papierumhüllung is guided in the groove. This is indicated at 32. The rod made of metal rod-shaped block 28 includes an axial bore 36 for receiving a heating cartridge, by means of which the surface of the groove 30 is brought to a predetermined temperature. The heated heating surface of the groove 30, the contour of which is adapted to the circular contour of the filter strand, heats the hot melt adhesive to the required temperature, so that a bond can take place with subsequent curing in the cooling device 20th

Parallel zur Bohrung 36 sind im stabförmigen Block 28 zwei Kühlkanäle 38, 40 geformt nahe der Hohlkehle 30. Die Kühlkanäle 38, 40 sind über in Abständen angeordnete Querbohrungen 42 bzw. 44 mit der Hohlkehle 30 bzw. deren Heizfläche in Verbindung. Die Abstände sind in der Darstellung nach Fig. 3 zu erkennen.Parallel to the bore 36, two cooling channels 38, 40 are formed near the groove 30 in the rod-shaped block 28. The cooling channels 38, 40 are arranged at intervals transverse bores 42 and 44 with the groove 30 and the heating surface in combination. The distances are in the illustration after Fig. 3 to recognize.

Die Kühlkanäle 38, 40 sind mit einer Quelle 46 für kühle Luft unter Druck verbunden, welche von einem Regler 48 eingestellt wird. Der Regler 48 ist mit einem Temperaturfühler 50 nahe der Hohlkehle 30 verbunden. Der Regler 48 vergleicht die gemessenen Temperaturwerte mit einem vorgegebenen gespeicherten Sollwert und steuert die Quelle 46 entsprechend an, um je nach Maßgabe der Abweichung mehr oder weniger kühle Luft durch die Kühlkanäle 38, 40 zu leiten, welche die Heizfläche der Hohlkehle 30 herunterkühlt.The cooling channels 38, 40 are connected to a cool air source 46 under pressure, which is adjusted by a regulator 48. The controller 48 is connected to a temperature sensor 50 near the groove 30. The controller 48 compares the measured temperature values with a predetermined stored setpoint value and controls the source 46 accordingly to direct more or less cool air through the cooling channels 38, 40 as the deviation dictates, which cools the heating surface of the fillet 30.

Claims (6)

  1. An apparatus for glueing together the wrap of an endless tow of filter material in the manufacture of cigarette filters, with an application station for hot melt adhesive, in which hot melt adhesive is applied to the flat endless web of the wrap, a wrapping station, in which the endless web is laid around the endless tow of filter material, a pre-heating station, in which the hot melt adhesive on the endless web is pre-heated to a preset temperature, while the wrap is brought into immediate contact with a heating surface in the region where adhesive is applied, and with a cooling station, in which the hot melt adhesive is cured, characterised in that a cooling apparatus is assigned to the pre-heating station (26), which causes a cooling of the heating surface when the temperature on the heating surface exceeds a preset value.
  2. An apparatus according to claim 1, characterised in that a temperature sensor (50) is assigned to the heating surface, whose measured temperature value is given up to a control device (48), and the control device adjusts the supply of a coolant depending on the deviation of the measured temperature from a desired temperature value.
  3. An apparatus according to claim 1 or 2, characterised in that the pre-heating station has a bar shaped block (28), with a flute (30) in which the endless tow is guided and wherein the bar shaped block (28) is assigned to a heating apparatus, characterised the cooling apparatus is assigned to the bar shaped block (28) also.
  4. An apparatus according to claim 3, characterised in that the cooling apparatus directs a cooling fluid to the bar shaped block (28).
  5. An apparatus according to claim 3, characterised in that at least one cooling channel (38, 40) is formed in the bar shaped block (28), which extends in the longitudinal direction of the bar shaped block (28) and is connected to the flute (30) in distances via bores (42, 44), and the cooling channel (38, 40) is connected with a source (46) for pressurised cooling fluid.
  6. An apparatus according to claim 5, characterised in that two parallel cooling channels (38, 40) run near to the flute (30), which are connected to the flute (30) near to the facing edges of the flute via radial bores (42, 44).
EP07724712A 2006-05-24 2007-04-28 Method for gluing the wrapping of a continuous strand of filter material Not-in-force EP2023750B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07724712T PL2023750T3 (en) 2006-05-24 2007-04-28 Method for gluing the wrapping of a continuous strand of filter material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025056A DE102006025056B4 (en) 2006-05-24 2006-05-24 Device for bonding the wrapping of a continuous strand of filter material
PCT/EP2007/003785 WO2007134699A1 (en) 2006-05-24 2007-04-28 Method for gluing the wrapping of a continuous strand of filter material

Publications (2)

Publication Number Publication Date
EP2023750A1 EP2023750A1 (en) 2009-02-18
EP2023750B1 true EP2023750B1 (en) 2010-07-07

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EP07724712A Not-in-force EP2023750B1 (en) 2006-05-24 2007-04-28 Method for gluing the wrapping of a continuous strand of filter material

Country Status (7)

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US (1) US20090183836A1 (en)
EP (1) EP2023750B1 (en)
AT (1) ATE472945T1 (en)
DE (2) DE102006025056B4 (en)
ES (1) ES2348121T3 (en)
PL (1) PL2023750T3 (en)
WO (1) WO2007134699A1 (en)

Cited By (1)

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US20090183836A1 (en) 2009-07-23
ES2348121T3 (en) 2010-11-30
PL2023750T3 (en) 2010-12-31
DE502007004335D1 (en) 2010-08-19
WO2007134699A1 (en) 2007-11-29
EP2023750A1 (en) 2009-02-18
ATE472945T1 (en) 2010-07-15
DE102006025056A1 (en) 2007-11-29
DE102006025056B4 (en) 2008-03-06

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