EP0715816A2 - Method and device for forming a filter rod in the tobacco industry - Google Patents

Method and device for forming a filter rod in the tobacco industry Download PDF

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Publication number
EP0715816A2
EP0715816A2 EP95118616A EP95118616A EP0715816A2 EP 0715816 A2 EP0715816 A2 EP 0715816A2 EP 95118616 A EP95118616 A EP 95118616A EP 95118616 A EP95118616 A EP 95118616A EP 0715816 A2 EP0715816 A2 EP 0715816A2
Authority
EP
European Patent Office
Prior art keywords
filter tow
strand
filter
plane
movement path
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.)
Withdrawn
Application number
EP95118616A
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German (de)
French (fr)
Other versions
EP0715816A3 (en
Inventor
Firdausia Dr. Chehab
Stefan Fietkau
Peter-Franz Arnold
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.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau 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 Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Publication of EP0715816A2 publication Critical patent/EP0715816A2/en
Publication of EP0715816A3 publication Critical patent/EP0715816A3/en
Withdrawn legal-status Critical Current

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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
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming

Definitions

  • the invention relates to a method for forming a filter tow for the production of filters for cigarettes or other smokable articles in the tobacco processing industry, in which a filter tow strip is spread out and processed, the prepared filter tow strip is gathered together into a filter tow strand and this is further processed to a filter strand, wherein the filter tow strand is moved at least in sections in a movement path plane.
  • It also relates to a device for forming a filter tow for the production of filters for cigarettes or other smokable articles in the tobacco processing industry, with a device for spreading and preparing a moving filter tow strip, a gathering device for gathering the spread and processed filter tow strip into a filter tow string and with one Filter tow strand at least in sections in a plane of movement path to a strand guiding device leading to a further processing machine.
  • Such a machine is known for example from US Pat. No. 4,511,420 or US Pat. No. 5,060,664.
  • These known machines pull a filter tow strip (for example from cellulose acetate threads) from a bale in a conventional manner and give it processed by stretching and treating with plasticizer and gathered it into a filter tow strand in a desired shape and consistency for further processing to a filter strand unit, which consists of the filter tow strand produces a filter strand by covering it with a wrapping material strip, which is finally cut into filter sticks for cigarettes or other such tobacco products.
  • the filter tow strip is gathered together and thus a filter tow strand is formed directly in the inlet funnel the processing machine.
  • Proven processing devices of the type described above are manufactured and sold by the applicant under the designations AF1, AF2 and AF3.
  • Proven filter rod machines from the applicant are known under the names KDF2 and KDF3.
  • the invention has for its object to provide a further advantageous method and a further advantageous device of the type mentioned for the processing of filter tow.
  • a plane of movement path is to be understood as an imaginary plane in which an arbitrarily assumed point of the filter tow strand moves in particular when the strand is deflected around a deflection roller or the like. In conventional filter tow processing machines, this plane of movement is essentially vertical.
  • the procedure according to the invention avoids the occurrence of "split" in the filter tow strand, which can impair the quality of the filter rods produced from the filter tow strand and is therefore undesirable.
  • “Towsplit” are understood to be parts of the filter tow strand which separate from the crosslinking in the strand formed by the preparation and gathering of the filter tow strip consisting of threads and thus separate from one another.
  • the effect of the measures proposed according to the invention preventing the formation of towsplit is improved in a further continuation of the invention in that the filter tow strand is deflected at least twice in opposite directions transverse to the plane of the movement path before it is passed on for further processing.
  • the filter tow strand is guided back into the first movement path plane after it has been deflected. In this way, the further movement of the filter tow strand takes place in the plane of the movement path, which is predetermined by the movement of the filter tow through the units of the machine preceding the deflection.
  • a continuation of the method proposed according to the invention is particularly advantageous, which consists in that the cross-section of the filter tow strand is reduced at least in the case of a deflection. If several deflections are provided, the cross section of the filter tow strand is further reduced in each case in the case of successive deflections transverse to the plane of the movement path. In this way, the cross section of the filter tow strand can already be largely adapted to the cross section of the filter strand to be produced before it enters the inlet funnel of the filter strand machine. The multiple deflections in the lateral direction further reduce the unwanted tow split.
  • the object on which the invention is based is achieved in that at least one further guide device which deflects the filter tow line transversely to the plane of the movement path is provided. Further developments and refinements of the device according to the invention are contained in subclaims 8 to 13. Claims 8 and 9 indicate means for improving the effect of the device according to the invention which reduces the split on the filter tow strand.
  • Claims 10 and 11 contain measures with which not only the tow split is better avoided, but also an adaptation of the cross section to the desired cross section of the filter strand to be produced is achieved at the same time.
  • Claim 12 contains features of a currently preferred embodiment of the device according to the invention. The features of claim 13 increase the formation of tow split reducing effect of the device proposed according to the invention.
  • the invention offers the advantage that the density distribution of the tow material in the strand cross-section is evened out during filter production from a filter tow strip in the strand process, and thus the formation of so-called tow split in the filter tow strand and in the products produced from the filter tow strand is avoided.
  • This is achieved according to the invention with the surprisingly simple measure of the additional deflection of the filter tow strand in a second plane of movement.
  • the filter tow strand is delivered to the filter strand machine in a cross-sectional shape approximating the filter strand to be produced. The design and mechanical engineering effort required for this is low.
  • FIG. 1 schematically shows a machine for producing a filter tow strand from a filter tow strip as an exemplary embodiment of the invention.
  • the illustration essentially only contains the functional parts of the machine which act on the filter tow strip or the filter tow strand for its processing. Details of the structural design of the machine are not shown for reasons of better clarity, since they are generally known to the applicant from the AF type machines on the market.
  • the filter tow to be processed e.g. consists of cellulose acetate threads, is drawn off as a filter towstrip 1 from a supply, for example a towball 2.
  • the filter tow strip then passes through a draw-off section 4, a pre-stretching section 6, a stretching section 7, an application section 8, a gathering section 9, a feed section 11 and an inlet device 12 of a filter strand machine 13, which is only indicated schematically, e.g. of the type KDF2 or KDF3 of the applicant known in the tobacco processing industry.
  • the filter tow strip reaches the stretching section 6 via deflection rollers 17 (spreading nozzles are described in US Pat. No. 4,259,769).
  • the pre-stretching section 6 is formed on the one hand by a pair of rollers 18 with rollers 19 and 21 and on the other hand by a pair of rollers 22 with motor-driven rollers 23 and 24.
  • the rollers 19 and 21 are towed by the filter tow strip 1, ie they run along with more or less resistance. If necessary, they can be motor-driven or braked in a known manner in a controlled manner.
  • the stretching between the towed rollers 19 and 21 of the pair of rollers 18 and the motor Driven rollers 23 and 24 of the pair of rollers 22 result in an equalization of the filter tow strip and leads to a better spreading of the strip transverse to its conveying direction 3.
  • the pre-stretching section 6 can be assigned further processing devices.
  • a drying device 26 can be seen, with which the filter tow strip is conditioned in a controlled manner as a function of its speed to a predetermined, preferably constant, relative humidity (water).
  • a suitable drying device 26 is marketed under the name Weko-Heat dryer by Haug GmbH and Co KG, Postfach 200333, D-70771 Leinfelden (Echterdingen).
  • further devices (not shown in the drawing) for processing and treating the filter tow strip can be arranged, such as a device for applying electrostatic charges of high potential, which ensure good separation of the individual, still adhering threads of the filter tow strip by electrostatic repulsive forces what is advantageous for the subsequent application of solvent to the filter tow strips. Details of the application of electrostatic charges are shown in US Pat. No. 3,817,211 and US Defensive Publication 665,476, US Official Gazette 860/3 of March 18, 1969.
  • the pair of rolls 22 is followed by the stretching section 7, which runs vertically or with an essentially vertical component from top to bottom in the exemplary embodiment shown, which consists of the upstream pair of rolls 22 with the rolls 23 and 24 and a further pair of rolls 27 with rolls 28 and 29 consists.
  • the rollers 28 and 29 are driven by a motor. Their peripheral speed is slightly greater than the peripheral speed of the upstream rollers 23 and 24, so that the filter tow strip 1 is stretched between these two roller pairs 22 and 27 in a defined manner.
  • the roller arrangement the stretching section and the roller configurations are known from the applicant's filter tow preparation devices AF1, AF2 and AF3 and are described, for example, in US Pat. Nos. 3,317,965 and 3,255,506. It has been shown that with a length of the stretching section 7 between 800 mm and 1200 mm, preferably about 1000 mm, a particularly good tow yield can be achieved.
  • roller pair 27 is followed by a further pair of rollers 31 with rollers 32 and 33, which are again driven by a motor.
  • the peripheral speed of the rollers 32 and 33 can be lower than that of the rollers 28 and 29, so that the filter tow strip between the roller pairs 27 and 31 can easily relax.
  • the at least approximately horizontal application section 8 in the device shown as an exemplary embodiment, in which an application device 34 on the filter tow strip a solvent for the filter tow material, e.g. Triacetin, sprayed on.
  • a solvent for the filter tow material e.g. Triacetin
  • the filter tow strip 1 in the embodiment of the machine shown in the drawing is conveyed upwards between the pair of rolls 31 and a deflecting roll 36 vertically or with a predominantly vertical component.
  • the gathering section 9 can contain one or more successive gathering devices in the form of wire loops, the diameter of which decreases in the conveying direction of the filter tow strip and thus reduces the width of the filter tow strip.
  • the gathering device 37 consists of a corrugated guide 38 which converges from the pair of rollers 31 towards the deflecting roller 36 and thus reduces the width of the filter tow strip, so that this lateral gathering of the filter tow strip 39 results in a filter tow strand 39, the cross section of which already corresponds to the cross section of the filter strand to be produced is approximated.
  • the deflection roller 36 deflects the filter tow strand 39 into the feed section 11, through which it reaches the inlet device 12 of the filter strand machine 13.
  • the course of the filter tow strand 39 from the gathering section 9 around the deflection roller 36 into the feed section 11 defines a vertical movement path plane, in which, in the exemplary embodiment of the machine according to the invention shown, the entire spreading and preparation of the filter tow takes place.
  • This trajectory plane is an imaginary plane in which an arbitrarily assumed point of the filter tow strand or strip moves when passing through the machine or a conveyor path section in the machine.
  • the plasticizer sprayed onto the spread filter tow stripes causes the fibers of cellulose acetate contained in the tow stripes to dissolve superficially, so that touching fibers stick together and adhere to one another at the contact points. If the filter tow strip that has been spread out and sprayed with plasticizer is gathered together laterally, a filter tow strand is created in which the fibers stick to one another at many points of contact. This gives the filter strand made from the filter tow strand its stable consistency and at the same time its filtering effect for tobacco smoke.
  • Zones of lower density preferably lie in certain cross-sectional areas, for example along a vertical radial plane of the strand. In these zones of lower density, the cohesion between the fibers of the gathered tow material is weakened, so that the strand or the filter made from it can break apart or break here. These zones of lower density are therefore also called "Towsplit". They represent a serious problem with filters Lack of quality, which can not only affect the stability of the filter, but also its filtering effect for tobacco smoke
  • a guide device 41 is assigned to the feed section 11, which is shown as view B in FIG. 2.
  • it consists of three deflection rollers 42, 43 and 44, which guide the filter tow line 39 in a second plane of movement path perpendicular to the first.
  • the pulleys are driven.
  • a motor 53 is shown in FIG. 1 to drive the roller 42.
  • the two other rollers 43 and 44 can also be driven by the motor 53 via a transmission (not shown) or by separate motors (not shown) via their axes 54 or 56.
  • the deflection roller 42 deflects the filter tow strand 39 to the side from the first movement path plane defined by the pair of rollers 31, the deflection roller 36 and the inlet device 12 and into the second movement path plane.
  • the direction of movement of the filter tow strand 39 is reversed around the deflection roller 43, and the filter tow strand is returned to the original movement path plane by the third deflection roller 44.
  • This lateral deflection around the deflection rollers 42 to 44 sequentially loads the filter tow strand from both sides and compresses it laterally more strongly. This also results in better bonding of the fibers that have not yet cured again at this stage, the result of which is an even distribution of the density of the tow material in the strand cross section.
  • Zones of lower density which are the cause of the occurrence of the so-called Towsplit, are largely prevented, if not completely excluded.
  • the radii of the fillets 46, 47 and 48 in the peripheral surfaces the deflection rollers 42 to 44 decrease in the conveying direction from the deflection roller to the deflection roller. It is thereby achieved that the filter tow strand 39 is further compressed and summarized as it moves around the deflection rollers 42 to 44, whereby not only its cross section is increasingly approximated to the cross section of the filter strand to be produced, but also the crosslinking of the fibers in the strand is intensified and the density is homogenized over the strand cross-section. This also helps to avoid the unwanted tow split and thus to improve the quality of the products manufactured
  • the filter tow strand 39 in the second movement path plane In addition to deflecting the filter tow strand 39 in the second movement path plane, it can be deflected at least once in the first movement path plane. This is realized in the machine described by the deflection roller 36 and causes the strand to be intensively compressed in a second radial plane. This further increases the effect of preventing the split of the device and method proposed according to the invention.
  • the filter tow strand After the filter tow strand is returned from the last deflection roller 44 of the guide device 41 back to the original movement path plane, it is passed through a stuffing nozzle 51, which is pressurized with compressed air from a compressed air source 49, into the inlet funnel 52 of the inlet device 12 of the filter rod machine 13, which transfers it to a filter rod and further processed into filter sections.

Abstract

The mfg. method involves feeding off a filter strip from a supply and assembling into a filter cord (39) which is deflected sidewards during its transport between successive processing stations. Pref. the filter cord is deflected sidewards at least twice, in opposite directions, during its transport between successive processing stations, with the cross-section of the filter cord reduced during its deflection in a direction transverse to the transport plane.

Description

Die Erfindung betrifft ein Verfahren zum Bilden eines Filtertowstrangs für die Herstellung von Filtern für Zigaretten oder andere rauchbare Artikel der tabakverarbeitenden Industrie, bei dem ein Filtertowstreifen ausgebreitet und aufbereitet, der aufbereitete Filtertowstreifen zu einem Filtertowstrang zusammengerafft und dieser einer Weiterverarbeitung zu einem Filterstrang zugeführt wird, wobei der Filtertowstrang wenigstens abschnittsweise in einer Bewegungsbahnebene bewegt wird. Sie betrifft außerdem eine Vorrichtung zum Bilden eines Filtertowstrangs für die Herstellung von Filtern für Zigaretten oder andere rauchbare Artikel der tabakverarbeitenden Industrie mit einer Einrichtung zum Ausbreiten und Aufbereiten eines bewegten Filtertowstreifens, einer Raffeinrichtung zum Zusammenraffen des ausgebreiteten und aufbereiteten Filtertowstreifens zu einem Filtertowstrang und mit einer den Filtertowstrang wenigstens abschnittsweise in einer Bewegungsbahnebene zu einer Weiterverarbeitungsmaschine führenden Strangführungseinrichtung.The invention relates to a method for forming a filter tow for the production of filters for cigarettes or other smokable articles in the tobacco processing industry, in which a filter tow strip is spread out and processed, the prepared filter tow strip is gathered together into a filter tow strand and this is further processed to a filter strand, wherein the filter tow strand is moved at least in sections in a movement path plane. It also relates to a device for forming a filter tow for the production of filters for cigarettes or other smokable articles in the tobacco processing industry, with a device for spreading and preparing a moving filter tow strip, a gathering device for gathering the spread and processed filter tow strip into a filter tow string and with one Filter tow strand at least in sections in a plane of movement path to a strand guiding device leading to a further processing machine.

Eine solche Maschine ist beispielsweise aus der US-PS 4 511 420 oder der US-PS 5 060 664 bekannt. Diese bekannten Maschinen ziehen in herkömmlicher Weise einen Filtertowstreifen (z.B. aus Cellulose-Acetatfäden) von einem Ballen ab und geben ihn durch Strecken und Behandeln mit Weichmacher aufbereitet und zu einem Filtertowstrang zusammengerafft in einer gewünschten Form und Konsistenz zur Weiterverarbeitung an eine Filterstrangeinheit ab, welche aus dem Filtertowstrang durch Umhüllung mit einem Hüllmaterialstreifen einen Filterstrang herstellt, der schließlich in Filterstäbe für Zigaretten oder andere derartige Tabakerzeugnisse zerschnitten wird. Bei diesen bekannten Maschinen erfolgt das Zusammenraffen des Filtertowstreifens und damit die Bildung eines Filtertowstrangs unmittelbar im Einlauftrichter der Weiterverarbeitungsmaschine. Durch die DE 42 40 089 A1 ist es weiter bekannt, den Filtertowstreifen zu einem Filtertowstrang zusammenzuraffen, bevor dieser den Einlauftrichter der Weiterverarbeitungsmaschine, beispielsweise einer Filterstrangmaschine, erreicht. In der Filterstrangmaschine wird der zu einem Filterstrang geformte Streifen unter weiterer Verdichtung fortlaufend mit einem Hüllmaterialstreifen umhüllt, wonach von dem umhüllten Filterstrang Filterstäbe abgetrennt werden.Such a machine is known for example from US Pat. No. 4,511,420 or US Pat. No. 5,060,664. These known machines pull a filter tow strip (for example from cellulose acetate threads) from a bale in a conventional manner and give it processed by stretching and treating with plasticizer and gathered it into a filter tow strand in a desired shape and consistency for further processing to a filter strand unit, which consists of the filter tow strand produces a filter strand by covering it with a wrapping material strip, which is finally cut into filter sticks for cigarettes or other such tobacco products. In these known machines, the filter tow strip is gathered together and thus a filter tow strand is formed directly in the inlet funnel the processing machine. From DE 42 40 089 A1 it is further known to gather the filter tow strip into a filter tow strand before it reaches the inlet funnel of the further processing machine, for example a filter strand machine. In the filter strand machine, the strip formed into a filter strand is continuously covered with a wrapping material strip with further compression, after which filter rods are separated from the covered filter strand.

Bewährte Aufbereitungsgeräte der vorbeschriebenen Art werden unter der Bezeichnung AF1, AF2 und AF3 von der Anmelderin gebaut und vertrieben. Bewährte Filterstrangmaschinen der Anmelderin sind unter der Bezeichnung KDF2 und KDF3 bekannt.Proven processing devices of the type described above are manufactured and sold by the applicant under the designations AF1, AF2 and AF3. Proven filter rod machines from the applicant are known under the names KDF2 and KDF3.

Der Erfindung liegt die Aufgabe zugrunde, ein weiteres vorteilhaftes Verfahren und eine weitere vorteilhafte Vorrichtung der eingangs angegebenen Art für die Verarbeitung von Filtertow zu schaffen.The invention has for its object to provide a further advantageous method and a further advantageous device of the type mentioned for the processing of filter tow.

Gelöst wird diese Aufgabe bei einem Verfahren der eingangs angegebenen Art erfindungsgemäß dadurch, daß der Filtertowstrang wenigstens einmal quer zur Bewegungsbahnebene umgelenkt wird, bevor er der Weiterverarbeitung zugeführt wird. Unter einer Bewegungsbahnebene ist im vorliegenden Fall eine gedachte Ebene zu verstehen, in welcher sich ein beliebig angenommener Punkt des Filtertowstrangs insbesondere bei einer Umlenkung des Strangs um eine Umlenkrolle oder dergleichen bewegt. Bei herkömmlichen Filtertowaufbereitungsmaschinen verläuft diese Bewegungsbahnebene im wesentlichen vertikal.This object is achieved according to the invention in a method of the type mentioned at the outset in that the filter tow strand is deflected at least once transversely to the plane of the movement path before it is fed to further processing. In the present case, a plane of movement path is to be understood as an imaginary plane in which an arbitrarily assumed point of the filter tow strand moves in particular when the strand is deflected around a deflection roller or the like. In conventional filter tow processing machines, this plane of movement is essentially vertical.

Durch das Vorgehen gemäß der Erfindung wird vermieden, daß im Filtertowstrang sogenannter "Towsplit" entsteht, der die Qualität der aus dem Filtertowstrang hergestellten Filterstäbe beeinträchtigen kann und daher unerwünscht ist. Unter "Towsplit" werden Teile des Filtertowstranges verstanden, die sich aus der durch die Aufbereitung und Zusammenraffung des aus Fäden bestehenden Filtertowstreifens gebildeten Vernetzung im Strang lösen und so voneinander trennen.The procedure according to the invention avoids the occurrence of "split" in the filter tow strand, which can impair the quality of the filter rods produced from the filter tow strand and is therefore undesirable. Under "Towsplit" are understood to be parts of the filter tow strand which separate from the crosslinking in the strand formed by the preparation and gathering of the filter tow strip consisting of threads and thus separate from one another.

Die der Bildung von Towsplit verhindernde Wirkung der erfindungsgemäß vorgeschlagenen Maßnahmen wird in weiterer Fortsetzung der Erfindung dadurch verbessert, daß der Filtertowstrang wenigstens zweimal in entgegengesetzen Richtungen quer zur Bewegungsbahnebene umgelenkt wird, bevor er der Weiterverarbeitung zugeführt wird. Um den konstruktiven Aufbau der Vorrichtung und ihre Anordnung zur Weiterverarbeitungsmaschine nicht zu ändern, ist vorgesehen, daß der Filtertowstrang nach seiner Auslenkung aus der ersten Bewegungsbahnebene heraus in diese zurückgeführt wird. Auf diese Weise erfolgt die weitere Bewegung des Filtertowstrangs in der Bewegungsbahnebene, die durch die der Umlenkung vorausgehende Bewegung des Filtertows durch die Aggregate der Maschine vorgegeben ist.The effect of the measures proposed according to the invention preventing the formation of towsplit is improved in a further continuation of the invention in that the filter tow strand is deflected at least twice in opposite directions transverse to the plane of the movement path before it is passed on for further processing. In order not to change the structural design of the device and its arrangement for the further processing machine, it is provided that the filter tow strand is guided back into the first movement path plane after it has been deflected. In this way, the further movement of the filter tow strand takes place in the plane of the movement path, which is predetermined by the movement of the filter tow through the units of the machine preceding the deflection.

Besonders vorteilhaft ist eine Fortführung des erfindungsgemäß vorgeschlagenen Verfahrens, die darin besteht, daß wenigstens bei einer Umlenkung der Querschnitt des Filtertowstrangs verkleinert wird. Sind mehrere Umlenkungen vorgesehen, so wird der Querschnitt des Filtertowstrangs bei aufeinanderfolgenden Umlenkungen quer zur Bewegungsbahnebene jeweils weiter reduziert. Auf diese Weise kann der Querschnitt des Filtertowstrangs vor dessen Einlauf in den Einlauftrichter der Filterstrangmaschine dem Querschnitt des herzustellenden Filterstrangs bereits weitgehend angepaßt werden. Dabei bewirken die mehrfachen Umlenkungen in seitlicher Richtung eine weitere Verringerung des unerwünschten Towsplits. Vor oder nach dem Umlenken des Filtertowstrangs quer zur Bewegungsbahnebene kann er gemäß der Erfindung auch noch wenigstens einmal in der Bewegungsbahnebene umgelenkt werden, wodurch sich ebenfalls eine Verringerung des Towsplits ergibt.
Bei einer Vorrichtung der eingangs angegebenen Art wird die der Erfindung zugrundeliegende Aufgabe dadurch gelöst, daß wenigstens eine weitere, den Filtertowstrang quer zur Bewegungsbahnebene umlenkende Führungseinrichtung vorgesehen ist. Weitere Fortführungen und Ausgestaltungen der Vorrichtung nach der Erfindung sind in den Unteransprüchen 8 bis 13 enthalten. Die Ansprüche 8 und 9 geben Mittel zur Verbesserung der den Towsplit am Filtertowstrang verringernden Wirkung der erfindungsgemäßen Vorrichtung an. Die Ansprüche 10 und 11 enthalten Maßnahmen, mit denen nicht nur der Towsplit besser vermieden, sondern auch gleichzeitig eine Anpassung des Querschnitts an den gewünschten Querschnitt des herzustellenden Filterstrangs erreicht wird. Anspruch 12 enthält Merkmale einer derzeit bevorzugten Ausführungsform der Vorrichtung nach der Erfindung. Die Merkmale des Anspruchs 13 erhöhen die die Bildung von Towsplit verringernde Wirkung der erfindungsgemäß vorgeschlagenen Vorrichtung.A continuation of the method proposed according to the invention is particularly advantageous, which consists in that the cross-section of the filter tow strand is reduced at least in the case of a deflection. If several deflections are provided, the cross section of the filter tow strand is further reduced in each case in the case of successive deflections transverse to the plane of the movement path. In this way, the cross section of the filter tow strand can already be largely adapted to the cross section of the filter strand to be produced before it enters the inlet funnel of the filter strand machine. The multiple deflections in the lateral direction further reduce the unwanted tow split. Before or after the deflection of the filter tow line transversely to the plane of the movement path, according to the invention it can also be deflected at least once in the plane of the movement path, which likewise results in a reduction in the split of the tow results.
In the case of a device of the type specified at the outset, the object on which the invention is based is achieved in that at least one further guide device which deflects the filter tow line transversely to the plane of the movement path is provided. Further developments and refinements of the device according to the invention are contained in subclaims 8 to 13. Claims 8 and 9 indicate means for improving the effect of the device according to the invention which reduces the split on the filter tow strand. Claims 10 and 11 contain measures with which not only the tow split is better avoided, but also an adaptation of the cross section to the desired cross section of the filter strand to be produced is achieved at the same time. Claim 12 contains features of a currently preferred embodiment of the device according to the invention. The features of claim 13 increase the formation of tow split reducing effect of the device proposed according to the invention.

Die Erfindung bietet den Vorteil, daß bei der Filterherstellung aus einem Filtertowstreifen im Strangverfahren die Dichteverteilung des Towmaterials im Strangquerschnitt vergleichmäßigt und damit die Bildung von sogenanntem Towsplit im Filtertowstrang und in den aus dem Filtertowstrang hergestellten Produkten vermieden wird. Erreicht wird das gemäß der Erfindung mit der überraschend einfachen Maßnahme der zusätzlichen Umlenkung des Filtertowstrangs in einer zweiten Bewegungsbahnebene. Gleichzeitig wird erreicht, daß der Filtertowstrang in einer dem herzustellenden Filterstrang angenäherten Querschnittsform an die Filterstrangmaschine abgegeben wird. Der dafür nötige konstruktive und maschinenbauliche Aufwand ist gering.The invention offers the advantage that the density distribution of the tow material in the strand cross-section is evened out during filter production from a filter tow strip in the strand process, and thus the formation of so-called tow split in the filter tow strand and in the products produced from the filter tow strand is avoided. This is achieved according to the invention with the surprisingly simple measure of the additional deflection of the filter tow strand in a second plane of movement. At the same time, it is achieved that the filter tow strand is delivered to the filter strand machine in a cross-sectional shape approximating the filter strand to be produced. The design and mechanical engineering effort required for this is low.

Die Erfindung wird nun anhand der Zeichnung näher erläutert.The invention will now be explained in more detail with reference to the drawing.

Es zeigen

Figur 1
eine Vorrichtung nach der Erfindung zum Herstellen eines Filtertowstrangs aus einem Filtertowstreifen und
Figur 2
eine Ansicht in Richtung des Pfeils B in Figur 1.
Show it
Figure 1
a device according to the invention for producing a filter tow strand from a filter tow strip and
Figure 2
a view in the direction of arrow B in Figure 1.

In Figur 1 ist als Ausführungsbeispiel der Erfindung eine Maschine zum Herstellen eines Filtertowstrangs aus einem Filtertowstreifen schematisch dargestellt. Die Darstellung enthält im wesentlichen nur die Funktionsteile der Maschine, die auf den Filtertowstreifen bzw. den Filtertowstrang zu dessen Verarbeitung einwirken. Einzelheiten des konstruktiven Aufbaus der Maschine sind aus Gründen der besseren Übersichtlichkeit nicht dargestellt, da sie durch die auf dem Markt befindlichen Maschinen vom Typ AF der Anmelderin grundsätzlich bekannt sind.FIG. 1 schematically shows a machine for producing a filter tow strand from a filter tow strip as an exemplary embodiment of the invention. The illustration essentially only contains the functional parts of the machine which act on the filter tow strip or the filter tow strand for its processing. Details of the structural design of the machine are not shown for reasons of better clarity, since they are generally known to the applicant from the AF type machines on the market.

Das zu verarbeitende Filtertow, das z.B. aus Celluloseacetat-Fäden besteht, wird als Filtertowstreifen 1 von einem Vorrat, beispielsweise einem Towballen 2 abgezogen. Der Filtertowstreifen durchläuft sodann in Abzugsrichtung 3 nacheinander eine Abzugsstrecke 4, eine Vorreckstrecke 6, eine Reckstrecke 7, eine Auftragstrecke 8, eine Raffstrecke 9, eine Zufuhrstrecke 11 und eine Einlaufeinrichtung 12 einer nur schematisch angedeuteten Filterstrangmaschine 13, z.B. vom in der tabakverarbeitenden Industrie bekannten Typ KDF2 oder KDF3 der Anmelderin.The filter tow to be processed, e.g. consists of cellulose acetate threads, is drawn off as a filter towstrip 1 from a supply, for example a towball 2. The filter tow strip then passes through a draw-off section 4, a pre-stretching section 6, a stretching section 7, an application section 8, a gathering section 9, a feed section 11 and an inlet device 12 of a filter strand machine 13, which is only indicated schematically, e.g. of the type KDF2 or KDF3 of the applicant known in the tobacco processing industry.

Aus der Abzugsstrecke 4, welche eine oder mehrere mit Druckluft von einer Druckluftquelle 14 beaufschlagte Ausbreiterdüsen zum seitlichen Ausbreiten des Filtertowstreifens 1 aufweist, gelangt der Filtertowstreifen über Umlenkrollen 17 in die Vorreckstrecke 6 (Ausbreiterdüsen sind in der US-A 4 259 769 beschrieben).From the draw-off section 4, which has one or more spreading nozzles acted upon by compressed air from a compressed air source 14 for the lateral spreading of the filter tow strip 1, the filter tow strip reaches the stretching section 6 via deflection rollers 17 (spreading nozzles are described in US Pat. No. 4,259,769).

Die Vorrreckstrecke 6 wird einerseits von einem Walzenpaar 18 mit Walzen 19 und 21 und andererseits von einem Walzenpaar 22 mit motorisch angetriebenen Walzen 23 und 24 gebildet. Die Walzen 19 und 21 werden vom Filtertowstreifen 1 geschleppt, d.h. sie laufen mit mehr oder weniger Widerstand leer mit. Bei Bedarf können sie motorisch angetrieben oder in bekannter Weise gesteuert gebremst werden. Das Vorrecken zwischen den geschleppten Walzen 19 und 21 des Walzenpaares 18 und den motorisch angetriebenen Walzen 23 und 24 des Walzenpaares 22 ergibt eine Vergleichmäßigung des Filtertowstreifens und führt zu einer besseren Ausbreitung des Streifens quer zu seiner Förderrichtung 3. Der Vorreckstrecke 6 können weitere Bearbeitungseinrichtungen zugeordnet sein. So ist in der Darstellung der Figur 1 eine Trocknungsvorrichtung 26 erkennbar, mit welcher der Filtertowstreifen in Abhängigkeit von seiner Geschwindigkeit gesteuert auf eine vorgegebene, bevorzugt konstante relative Feuchte (Wasser) konditioniert wird. Eine geeignete Trocknungsvorrichtung 26 wird unter der Bezeichnung Weko-Heat-Trockner von der Firma Haug GmbH und Co KG, Postfach 200333, D-70771 Leinfelden (Echterdingen) vertrieben. In der Vorreckstrecke 6 können weitere, in der Zeichnung nicht dargestellte Vorrichtungen zum Aufbereiten und Behandeln des Filtertowstreifens angeordnet sein, so auch eine Vorrichtung zum Aufbringen elektrostatischer Ladungen hohen Potentials, die für eine gute Trennung der einzelnen, noch aneinander haftenden Fäden des Filtertowstreifens durch elektrostatische Abstoßungskräfte sorgen, was für das folgende Aufbringen von Lösungsmittel auf den Filtertowstreifen vorteilhaft ist. Einzelheiten über das Aufbringen von elektrostatischen Ladungen zeigen die US-A 3 817 211 und die US-Defensive Publikation 665 476, US-Official Gazette 860/3 vom 18.03.1969.The pre-stretching section 6 is formed on the one hand by a pair of rollers 18 with rollers 19 and 21 and on the other hand by a pair of rollers 22 with motor-driven rollers 23 and 24. The rollers 19 and 21 are towed by the filter tow strip 1, ie they run along with more or less resistance. If necessary, they can be motor-driven or braked in a known manner in a controlled manner. The stretching between the towed rollers 19 and 21 of the pair of rollers 18 and the motor Driven rollers 23 and 24 of the pair of rollers 22 result in an equalization of the filter tow strip and leads to a better spreading of the strip transverse to its conveying direction 3. The pre-stretching section 6 can be assigned further processing devices. 1, a drying device 26 can be seen, with which the filter tow strip is conditioned in a controlled manner as a function of its speed to a predetermined, preferably constant, relative humidity (water). A suitable drying device 26 is marketed under the name Weko-Heat dryer by Haug GmbH and Co KG, Postfach 200333, D-70771 Leinfelden (Echterdingen). In the stretching section 6, further devices (not shown in the drawing) for processing and treating the filter tow strip can be arranged, such as a device for applying electrostatic charges of high potential, which ensure good separation of the individual, still adhering threads of the filter tow strip by electrostatic repulsive forces what is advantageous for the subsequent application of solvent to the filter tow strips. Details of the application of electrostatic charges are shown in US Pat. No. 3,817,211 and US Defensive Publication 665,476, US Official Gazette 860/3 of March 18, 1969.

An das Walzenpaar 22 schließt sich die im gezeigten Ausführungsbeispiel der Maschine senkrecht oder mit einer wesentlichen senkrechten Komponente von oben nach unten verlaufende Reckstrecke 7 an, die aus dem stromaufwärtigen Walzenpaar 22 mit den Walzen 23 und 24 und einem weiteren Walzenpaar 27 mit Walzen 28 und 29 besteht. Die Walzen 28 und 29 sind motorisch angetrieben. Ihre Umfangsgeschwindigkeit ist etwas größer als die Umfangsgeschwindigkeit der stromaufwärtigen Walzen 23 und 24, so daß der Filtertowstreifen 1 zwischen diesen beiden Walzenpaaren 22 und 27 auf definierte Weise gereckt wird. Die Walzenanordnung der Reckstrecke und die Walzenkonfigurationen sind durch die Filtertowaufbereitungsgeräte AF1, AF2 und AF3 der Anmelderin bekannt und z.B. in der US-A 3 317 965 und der US-A 3 255 506 beschrieben. Es hat sich gezeigt, daß bei einer Länge der Reckstrecke 7 zwischen 800 mm und 1200 mm, vorzugsweise etwa 1000 mm eine besonders gute Towausbeute erzielbar ist.The pair of rolls 22 is followed by the stretching section 7, which runs vertically or with an essentially vertical component from top to bottom in the exemplary embodiment shown, which consists of the upstream pair of rolls 22 with the rolls 23 and 24 and a further pair of rolls 27 with rolls 28 and 29 consists. The rollers 28 and 29 are driven by a motor. Their peripheral speed is slightly greater than the peripheral speed of the upstream rollers 23 and 24, so that the filter tow strip 1 is stretched between these two roller pairs 22 and 27 in a defined manner. The roller arrangement the stretching section and the roller configurations are known from the applicant's filter tow preparation devices AF1, AF2 and AF3 and are described, for example, in US Pat. Nos. 3,317,965 and 3,255,506. It has been shown that with a length of the stretching section 7 between 800 mm and 1200 mm, preferably about 1000 mm, a particularly good tow yield can be achieved.

Auf das Walzenpaar 27 folgt ein weiteres Walzenpaar 31 mit Walzen 32 und 33, die wieder motorisch angetrieben sind. Die Umfangsgeschwindigkeit der Walzen 32 und 33 kann geringer sein als die der Walzen 28 und 29, so daß sich der Filtertowstreifen zwischen den Walzenpaaren 27 und 31 leicht entspannen kann.The roller pair 27 is followed by a further pair of rollers 31 with rollers 32 and 33, which are again driven by a motor. The peripheral speed of the rollers 32 and 33 can be lower than that of the rollers 28 and 29, so that the filter tow strip between the roller pairs 27 and 31 can easily relax.

Zwischen den Walzenpaaren 27 und 31 liegt die in der als Ausführungsbeispiel dargestellten Vorrichtung wenigstens angenähert horizontal verlaufende Auftragstrecke 8, in welcher eine Auftrageinrichtung 34 auf den Filtertowstreifen ein Lösungsmittel für das Filtertowmaterial, z.B. Triacetin, aufsprüht.Between the roller pairs 27 and 31 is the at least approximately horizontal application section 8 in the device shown as an exemplary embodiment, in which an application device 34 on the filter tow strip a solvent for the filter tow material, e.g. Triacetin, sprayed on.

In der der Auftragstrecke 8 nachgeordneten Raffstrecke 9 wird der Filtertowstreifen 1 in der in der Zeichnung dargestellten Ausführungsform der Maschine zwischen dem Walzenpaar 31 und einer Umlenkwalze 36 senkrecht oder mit überwiegend senkrechter Komponente nach oben gefördert. Die Raffstrecke 9 kann eine oder mehrere aufeinanderfolgende Raffeinrichtungen in Form von Drahtschlaufen enthalten, deren Durchmesser sich in Förderrichtung des Filtertowstreifens verringert und so die Breite des Filtertowstreifens reduziert. Im dargestellten Fall besteht die Raffeinrichtung 37 aus einer geriffelten Führung 38, die vom Walzenpaar 31 ausgehend zur Umlenkwalze 36 hin konvergiert und so die Breite des Filtertowstreifens verringert, so daß durch dieses seitliche Zusammenraffen des Filtertowstreifens ein Filtertowstrang 39 entsteht, dessen Querschnitt bereits dem Querschnitt des herzustellenden Filterstrangs angenähert ist.In the gathering section 9 downstream of the application section 8, the filter tow strip 1 in the embodiment of the machine shown in the drawing is conveyed upwards between the pair of rolls 31 and a deflecting roll 36 vertically or with a predominantly vertical component. The gathering section 9 can contain one or more successive gathering devices in the form of wire loops, the diameter of which decreases in the conveying direction of the filter tow strip and thus reduces the width of the filter tow strip. In the illustrated case, the gathering device 37 consists of a corrugated guide 38 which converges from the pair of rollers 31 towards the deflecting roller 36 and thus reduces the width of the filter tow strip, so that this lateral gathering of the filter tow strip 39 results in a filter tow strand 39, the cross section of which already corresponds to the cross section of the filter strand to be produced is approximated.

Die Umlenkwalze 36 lenkt den Filtertowstrang 39 in die Zufuhrstrecke 11 um, durch welche er zur Einlaufeinrichtung 12 der Filterstrangmaschine 13 gelangt. Der Verlauf des Filtertowstrangs 39 aus der Raffstrecke 9 um die Umlenkwalze 36 herum in die Zufuhrstrecke 11 definiert eine vertikale Bewegungsbahnebene, in der beim gezeigten Ausführungsbeispiel der Maschine nach der Erfindung auch die ganze Ausbreitung und Aufbereitung des Filtertows erfolgt. Diese Bewegungsbahnebene ist eine gedachte Ebene, in welcher sich ein beliebig angenommener Punkt des Filtertowstrangs oder -streifens beim Durchlaufen der Maschine oder eines Förderwegabschnitts in der Maschine bewegt.The deflection roller 36 deflects the filter tow strand 39 into the feed section 11, through which it reaches the inlet device 12 of the filter strand machine 13. The course of the filter tow strand 39 from the gathering section 9 around the deflection roller 36 into the feed section 11 defines a vertical movement path plane, in which, in the exemplary embodiment of the machine according to the invention shown, the entire spreading and preparation of the filter tow takes place. This trajectory plane is an imaginary plane in which an arbitrarily assumed point of the filter tow strand or strip moves when passing through the machine or a conveyor path section in the machine.

Bekanntlich bewirkt der auf den ausgebreiteten Filtertowstreifen aufgesprühte Weichmacher ein oberflächliches Anlösen der im Towstreifen enthaltenen Fasern aus Celluloseacetat, so daß sich berührende Fasern an den Berührungsstellen miteinander verkleben und aneinanderhaften. Wird der ausgebreitete und mit Weichmacher besprühte Filtertowstreifen seitlich zusammengerafft, so entsteht ein Filtertowstrang, in dem die Fasern an vielen Berührungsstellen miteinander verkleben. Dadurch erhält der aus dem Filtertowstrang hergestellte Filterstrang seine stabile Konsistenz und zugleich seine Filterwirkung für Tabakrauch.As is known, the plasticizer sprayed onto the spread filter tow stripes causes the fibers of cellulose acetate contained in the tow stripes to dissolve superficially, so that touching fibers stick together and adhere to one another at the contact points. If the filter tow strip that has been spread out and sprayed with plasticizer is gathered together laterally, a filter tow strand is created in which the fibers stick to one another at many points of contact. This gives the filter strand made from the filter tow strand its stable consistency and at the same time its filtering effect for tobacco smoke.

Bei Untersuchungen vom Filterstrang abgetrennten Filterstäben und Filterabschnitten hat sich häufig eine ungleichmäßige Dichte des Filtertowmaterials über deren Querschnitt herausgestellt. Dabei liegen Zonen geringerer Dichte bevorzugt in bestimmten Querschnittsbereichen, beispielsweise entlang einer vertikalen Radialebene des Strangs. In diesen Zonen geringerer Dichte ist der Zusammenhalt zwischen den Fasern des zusammengerafften Towmaterials geschwächt, so daß der Strang oder die aus ihm hergestellten Filter hier auseinanderfallen oder -brechen können. Diese Zonen geringerer Dichte werden daher auch als "Towsplit" bezeichnet. Sie stellen bei Filtern einen gravierenden Qualitätsmangel dar, der nicht nur die Stabilität der Filter, sondern auch deren Filterwirkung für Tabakrauch beeinträchtigen kann.When examining filter rods and filter sections separated from the filter strand, an uneven density of the filter tow material over their cross-section has often been found. Zones of lower density preferably lie in certain cross-sectional areas, for example along a vertical radial plane of the strand. In these zones of lower density, the cohesion between the fibers of the gathered tow material is weakened, so that the strand or the filter made from it can break apart or break here. These zones of lower density are therefore also called "Towsplit". They represent a serious problem with filters Lack of quality, which can not only affect the stability of the filter, but also its filtering effect for tobacco smoke

Um der Bildung derartiger Zonen geringerer Dichte im Strangquerschnitt und damit der Entstehung des höchst unerwünschten Towsplits möglichst weitgehend entgegenzuwirken, ist der Zufuhrstrecke 11 gemäß der Erfindung eine Führungseinrichtung 41 zugeordnet, die in der Figur 2 als Ansicht B dargestellt ist. Sie besteht im gezeigten Ausführungsbeispiel aus drei Umlenkrollen 42, 43 und 44, die den Filtertowstrang 39 in einer zweiten, zur ersten senkrechten Bewegungsbahnebene führen. Die Umlenkrollen sind angetrieben. Als Antrieb der Rolle 42 ist in Figur 1 ein Motor 53 dargestellt. Die beiden anderen Rollen 43 und 44 können über ein nicht dargestelltes Getriebe ebenfalls vom Motor 53 oder über ihre Achsen 54 bzw. 56 von separaten Motoren (nicht eingezeichnet) angetrieben werden. Die Umlenkrolle 42 lenkt den Filtertowstrang 39 zur Seite hin aus der durch das Walzenpaar 31, die Umlenkrolle 36 und die Einlaufeinrichtung 12 definierten ersten Bewegungsbahnebene aus und in die zweite Bewegungsbahnebene hinein. Um die Umlenkrolle 43 herum wird die Bewegungsrichtung des Filtertowstrangs 39 umgekehrt, und durch die dritte Umlenkrolle 44 wird der Filtertowstrang wieder in die ursprüngliche Bewegungsbahnebene zurückgeführt. Diese seitliche Auslenkung um die Umlenkrollen 42 bis 44 belastet den Filtertowstrang nacheinander von beiden Seiten und drückt ihn seitlich stärker zusammen. Dadurch ergibt sich auch in dieser Richtung eine bessere Verklebung der in diesem Stadium noch nicht wieder ausgehärteten Fasern, deren Ergebnis eine gleichmäßige Verteilung der Dichte des Towmaterials im Strangquerschnitt ist. Zonen geringerer Dichte, die die Ursache für das Auftreten des sogenannten Towsplits sind, werden dabei weitgehend verhindert, wenn nicht sogar ganz ausgeschlossen. Die Radien der Kehlungen 46, 47 und 48 in den Umfangsflächen der Umlenkrollen 42 bis 44 nehmen in Förderrichtung von Umlenkrolle zu Umlenkrolle ab. Dadurch wird erreicht, daß der Filtertowstrang 39 bei seiner Bewegung um die Umlenkrollen 42 bis 44 herum weiter zusammengedrückt und zusammengefaßt wird, wodurch nicht nur sein Querschnitt immer mehr dem Querschnitt des zu erzeugenden Filterstrangs angenähert wird, sondern sich auch die Vernetzung der Fasern im Strang intensiviert und die Dichte über den Strangquerschnitt homogenisiert wird. Auch dies trägt so zur Vermeidung des unerwünschten Towsplits und damit zur Verbesserung der Qualität der hergestellten Produkte beiIn order to counteract as far as possible the formation of such zones of lower density in the strand cross section and thus the formation of the highly undesirable tow split, a guide device 41 is assigned to the feed section 11, which is shown as view B in FIG. 2. In the exemplary embodiment shown, it consists of three deflection rollers 42, 43 and 44, which guide the filter tow line 39 in a second plane of movement path perpendicular to the first. The pulleys are driven. A motor 53 is shown in FIG. 1 to drive the roller 42. The two other rollers 43 and 44 can also be driven by the motor 53 via a transmission (not shown) or by separate motors (not shown) via their axes 54 or 56. The deflection roller 42 deflects the filter tow strand 39 to the side from the first movement path plane defined by the pair of rollers 31, the deflection roller 36 and the inlet device 12 and into the second movement path plane. The direction of movement of the filter tow strand 39 is reversed around the deflection roller 43, and the filter tow strand is returned to the original movement path plane by the third deflection roller 44. This lateral deflection around the deflection rollers 42 to 44 sequentially loads the filter tow strand from both sides and compresses it laterally more strongly. This also results in better bonding of the fibers that have not yet cured again at this stage, the result of which is an even distribution of the density of the tow material in the strand cross section. Zones of lower density, which are the cause of the occurrence of the so-called Towsplit, are largely prevented, if not completely excluded. The radii of the fillets 46, 47 and 48 in the peripheral surfaces the deflection rollers 42 to 44 decrease in the conveying direction from the deflection roller to the deflection roller. It is thereby achieved that the filter tow strand 39 is further compressed and summarized as it moves around the deflection rollers 42 to 44, whereby not only its cross section is increasingly approximated to the cross section of the filter strand to be produced, but also the crosslinking of the fibers in the strand is intensified and the density is homogenized over the strand cross-section. This also helps to avoid the unwanted tow split and thus to improve the quality of the products manufactured

Zusätzlich zur Umlenkung des Filtertowstrangs 39 in der zweiten Bewegungsbahnebene kann er wenigstens einmal in der ersten Bewegungsbahnebene umgelenkt werden. Das wird in der beschriebenen Maschine durch die Umlenkrolle 36 realisiert und bewirkt ein intensives Zusammendrücken des Strangs in einer zweiten Radialebene. Dadurch wird die den Towsplit verhindernde Wirkung der erfindungsgemäß vorgeschlagenen Vorrichtung und Verfahrensweise noch einmal weiter erhöht.In addition to deflecting the filter tow strand 39 in the second movement path plane, it can be deflected at least once in the first movement path plane. This is realized in the machine described by the deflection roller 36 and causes the strand to be intensively compressed in a second radial plane. This further increases the effect of preventing the split of the device and method proposed according to the invention.

Nachdem der Filtertowstrang von der letzten Umlenkrolle 44 der Führungseinrichtung 41 wieder in die ursprüngliche Bewegungsbahnebene zurückgeführt ist, wird er durch eine mit Druckluft aus einer Druckluftquelle 49 beaufschlagte Stopfdüse 51 hindurch in den Einlauftrichter 52 der Einlaufeinrichtung 12 der Filterstrangmaschine 13 übergeben, welche ihn zu einem Filterstrang und weiter zu Filterabschnitten verarbeitet.After the filter tow strand is returned from the last deflection roller 44 of the guide device 41 back to the original movement path plane, it is passed through a stuffing nozzle 51, which is pressurized with compressed air from a compressed air source 49, into the inlet funnel 52 of the inlet device 12 of the filter rod machine 13, which transfers it to a filter rod and further processed into filter sections.

Claims (13)

Verfahren zum Bilden eines Filtertowstrangs für die Herstellung von Filtern für Zigaretten oder andere rauchbare Artikel der tabakverarbeitenden Industrie, bei dem ein Filtertowstreifen ausgebreitet und aufbereitet, der aufbereitete Filtertowstreifen zu einem Filtertowstrang zusammengerafft und dieser einer Weiterverarbeitung zu einem Filterstrang zugeführt wird, wobei der Filtertowstrang wenigstens abschnittsweise in einer Bewegungsbahnebene bewegt wird, dadurch gekennzeichnet, daß der Filtertowstrang wenigstens einmal quer zur Bewegungsbahnebene umgelenkt wird, bevor er der Weiterverarbeitung zugeführt wird.Method for forming a filter tow strand for the production of filters for cigarettes or other smokable articles of the tobacco processing industry, in which a filter tow strip is spread out and processed, the prepared filter tow strip is gathered together to form a filter tow strand and this is fed to a filter strand for further processing, the filter tow strand at least in sections is moved in a trajectory plane, characterized in that the filter tow strand is deflected at least once transversely to the trajectory plane before it is passed on for further processing. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Filtertowstrang wenigstens zweimal in entgegengesetzten Richtungen quer zur Bewegungsbahnebene umgelenkt wird, bevor er der Weiterverarbeitung zugeführt wird.Method according to Claim 1, characterized in that the filter tow strand is deflected at least twice in opposite directions transversely to the plane of the movement path before it is passed on for further processing. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Filtertowstrang nach seiner Auslenkung aus der Bewegungsbahnebene heraus in diese zurückgeführt wird.Method according to claim 1 or 2, characterized in that the filter tow strand is guided back into the plane of the movement path after it has been deflected. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß wenigstens bei einer Umlenkung der Querschnitt des Filtertowstrangs verkleinert wird.Method according to one of claims 1 to 3, characterized in that the cross-section of the filter tow strand is reduced at least when deflected. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Querschnitt des Filtertowstrangs bei aufeinanderfolgenden Umlenkungen quer zur Bewegungsbahnebene jeweils reduziert wird.Method according to one of claims 1 to 4, characterized in that the cross section of the filter tow strand is reduced in each case with successive deflections transverse to the plane of the movement path. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Filtertowstrang auch wenigstens einmal in der Bewegungsbahnebene umgelenkt wird.Method according to one of claims 1 to 5, characterized in that the filter tow strand is also deflected at least once in the plane of the movement path. Vorrichtung zum Bilden eines Filtertowstrangs für die Herstellung von Filtern für Zigaretten oder andere rauchbare Artikel der tabakverarbeitenden Industrie mit einer Einrichtung zum Ausbreiten und Aufbereiten eines bewegten Filtertowstreifens, einer Raffeinrichtung zum Zusammenraffen des ausgebreiteten und aufbereiteten Filtertowstreifens zu einem Filtertowstrang und mit einer den Filtertowstrang wenigstens abschnittsweise in einer Bewegungsbahnebene zu einer Weiterverarbeitungsmaschine führenden Strangführungseinrichtung, dadurch gekennzeichnet, daß wenigstens eine weitere, den Filtertowstrang (39) quer zur Bewegungsbahnebene umlenkende Führungseinrichtung (41) vorgesehen ist.Device for forming a filter tow for the production of filters for cigarettes or other smokable articles of the tobacco processing industry with a device for spreading and processing a moving filter tow strip, a gathering device for gathering the spread and prepared filter tow strip into a filter tow and with at least sections of the filter tow a line of motion path leading to a further processing machine, characterized in that at least one further guide device (41) deflecting the filter tow line (39) transversely to the plane of the path of movement is provided. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die weitere Führungseinrichtung (41) Mittel (42,43,44) zum mehrmaligen Umlenken des Filtertowstrangs (39) in unterschiedliche Richtungen aufweist.Device according to Claim 7, characterized in that the further guide device (41) has means (42, 43, 44) for repeatedly deflecting the filter tow strand (39) in different directions. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß die Umlenkmittel (42 bis 44) der weiteren Führungseinrichtung (41) den Filtertowstrang (39) quer zur Bewegungsbahnebene wenigstens zweimal in entgegengesetzten Richtungen umlenken.Apparatus according to claim 7 or 8, characterized in that the deflecting means (42 to 44) of the further guide device (41) deflect the filter tow strand (39) transversely to the plane of the movement path in opposite directions at least twice. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß als Umlenkmittel (42 bis 44) der weiteren Führungseinrichtung (41) wenigstens eine Umlenkrolle (42 bis 44) mit einer den Filtertowstrang (39) führenden Kehlung (46,47,48) vorgesehen ist.Device according to one of claims 7 to 9, characterized in that at least one deflection roller (42 to 44) with a groove (46, 47, 48) guiding the filter tow strand (39) serves as the deflection means (42 to 44) of the further guide device (41). is provided. Vorrichtung nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, daß die weitere Führungseinrichtung (41) in Bewegungsrichtung des Filtertowstrangs (39) aufeinanderfolgend mehrere Umlenkrollen (42 bis 44) mit abnehmender Kehlungsweite aufweist.Device according to one of claims 7 to 10, characterized in that the further guide device (41) in the direction of movement of the filter tow strand (39) has a plurality of deflecting rollers (42 to 44) with decreasing fillet width. Vorrichtung nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, daß die weitere Führungseinrichtung (41) drei Umlenkrollen (42 bis 44) aufweist, die den Filtertowstrang (39) aus der ersten Bewegungsbahnebene heraus in eine zweite, zur ersten quer verlaufende Bewegungsbahnebene umlenken, zurückführen und schließlich wieder in die erste Bewegungsbahnebene abgeben.Device according to one of claims 7 to 11, characterized in that the further guide device (41) has three deflection rollers (42 to 44) which deflect the filter tow strand (39) out of the first movement path plane into a second movement path plane which runs transversely to the first, lead back and finally return to the first movement path level. Vorrichtung nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, daß der weiteren Führungseinrichtung (41) wenigstens ein den Filtertowstrang (39) in der Bewegungsbahnebene umlenkendes Umlenkmittel (36) vor- oder nachgeordnet ist.Device according to one of claims 7 to 12, characterized in that at least one deflecting means (36) deflecting the filter tow strand (39) in the plane of the movement path is arranged upstream or downstream of the further guide device (41).
EP95118616A 1994-12-09 1995-11-27 Method and device for forming a filter rod in the tobacco industry Withdrawn EP0715816A3 (en)

Applications Claiming Priority (2)

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DE4443866A DE4443866A1 (en) 1994-12-09 1994-12-09 Method and device for forming a filter tow of the tobacco processing industry
DE4443866 1994-12-09

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EP0715816A2 true EP0715816A2 (en) 1996-06-12
EP0715816A3 EP0715816A3 (en) 1999-11-03

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EP2292107A1 (en) 2003-11-25 2011-03-09 Hauni Maschinenbau Aktiengesellschaft Device for providing filter tow material and device for producing filters
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CN1913791B (en) * 2004-03-16 2010-11-10 日本烟草产业株式会社 Filter rod manufacturing machine
EP2022351A3 (en) * 2007-08-07 2010-09-01 G.D S.p.A. An apparatus for processing at least one strip of filters material in the tobacco industry
CN101361592B (en) * 2007-08-07 2013-12-04 吉地股份公司 An apparatus for processing at least one strip of filters material in the tobacco industry
WO2011042174A3 (en) * 2009-10-09 2011-06-30 Philip Morris Products S.A. A method and apparatus for manufacture of smoking article filter assembly including electrostatically charged fibers
US8534294B2 (en) 2009-10-09 2013-09-17 Philip Morris Usa Inc. Method for manufacture of smoking article filter assembly including electrostatically charged fiber
US9788572B2 (en) 2009-10-09 2017-10-17 Philip Morris Usa Inc. Method and apparatus for manufacture of smoking article filter assembly including electrostatically charged fibers
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US5725467A (en) 1998-03-10
EP0715816A3 (en) 1999-11-03
CN1133148A (en) 1996-10-16
DE4443866A1 (en) 1996-06-13

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