DE102006001643A1 - Deflection device for conveying and deflection of filter tow strand, has passage and returning device, which cooperates with transport unit for pneumatically driven deflection of filter tow strand - Google Patents

Abstract

The device has a passage (2a,2b), transport unit (40) and returning unit (50). The transport unit pneumatically conveys filter tow strand (13). The returning unit cooperates with the transport unit for pneumatically driven deflection of the filter tow strand. The deflection device is so aligned that deflection of filter tow strand has horizontal component. Independent claims are included for the following: (1) a machine for production of filter rod with deflection device (2) a method for conveying and deflection of filter tow strand.

Description

The The invention relates to a deflection device for conveying and deflecting at least a filter tow line. This device can be equipped with a format part, in particular with an intake system of a machine for production of filter rods be coupled. moreover The invention relates to a machine comprising such a deflection device and a method of conveying and deflecting at least one filter tow.

A Deflection device of the type mentioned is, for example from WO 2005/058 079 A1. This deflection device is used in double-strand machines, the two format sections for Formation of continuous filter rods and a filter material supply line for every Include format range. The supply lines receive the filter material from a conveyor line, located between an inlet area of the supply lines and a Storage area extends from two filter material bales. Of the Bales are each unwound over the conveyor belt fed to a blower, which is provided in the inlet area to the two Lunten transversal into two strips of filter material to pull apart. Be after the blower the two strips along respective feeds through a pressing device, then by an expander, in the air in the strip is blown to increase their volume, and finally through promoted a treatment facility where chemical substances the strip can be added to taste the filter material and To give moldability.

Each feeder is connected to the format section by a stabilizer unit which serves to convert and stabilize the strips into strands of filter material. The stabilizer unit receives a strip from the feeder and feeds it, in the form of a uniform strand, onto a strip of previously rubberized paper in the format line. The stabilizing unit usually has a hopper for each feeder into which the strip is inserted and compacted, thereby forming the filter material strand. In order to improve the homogeneity of the filter material in the strand, air can be blown into the hopper, such as in the US 4,200,616 A1 described.

Of the Paper strip is transversal around the strand in the format section wound, whereby a continuous filter rod is formed. At the outlet of the format sections, a control unit checks the Density of the filter rods. A cutting head cuts the bars in individual filter sections.

It is known in the stabilization unit the distance between the two filter material strands to lower. For example, in WO 2005/058 079 A1, the distance between the two filter material strands thereby reduced that for each Filter material strand two inlet funnel with two curved arches used become.

The Reducing the distance between the two strands in the stabilization unit of the machine according to WO 2005/058 079 A1 is by causes two pulleys, which have a V-shaped cross-section. The two pulleys act with the curvature arcs of the two inlet funnels together and get the filter tow strand from two transport rollers. The filter material strand is therefore fed mechanically into the two inlet funnel.

by virtue of the deflection function, the stabilization unit as a deflection unit be considered.

Filter rods, the on known filter rod machines with one described above Stabilization or deflection unit are manufactured, have a insufficient homogeneity on.

Of the Invention is based on the object, the aforementioned deflection continue to develop so that filter rods produced with improved homogeneity can be. moreover should the device with comparatively low cost easily to be implemented. Another object of the invention is therein, a machine with such a deflection device and a Method of conveying and diverting at least one filter tow strand.

According to the invention above-mentioned object with regard to the deflection device by the subject-matter of claim 1, with regard to the machine by the subject-matter of claim 29 and with regard to the method by the subject matter of claim 32 solved. Alternatively, the task by a device for the production of cigarette filters the independent one Claim 33 solved.

Further Improvements and constructional details of the invention are disclosed in U.S. Patent Nos. 4,736,866 Subclaims specified.

One essential point of the invention is to provide a Transport device for pneumatically conveying the at least one Filter strands and a deflection device with the transport device interacts with the pneumatically driven deflection of the filter tow.

This means that the conveying direction changed the strand is, wherein the driving force, at least in the area where the conveying direction changed is, that is applied pneumatically in the area of the deflection.

Without to bind to the following theory, it is believed that the Combination of the pneumatic transport with the deflection of the strand in a reinforced Turbulence of the material results, creating a very homogeneous Filter material is obtained. In particular, the draw resistance and the draw resistance spread of a filter rod is significantly improved, the by a filter rod machine with the deflection device according to the invention available is. moreover can the deflection device according to the invention implemented cost-effectively so that the overall cost of the filter rod machine is reduced become. The deflection device according to the invention can be used in a simple way in known filter rod machines be, with only the existing deflection of such a Machine by the deflection device according to the invention is replaced.

in the Contrary to the deflection device according to the invention is the known deflection device according to WO 2005/058 079 A1 thereto aligned, the filter tow line mechanically into the format part of Feed the machine. The known deflection coupled to it a mechanical conveyor with a deflection device. This filter rod machine is therefore unable to produce a filter material with respect to on the homogeneity, the draw resistance and draw resistance scattering are comparable with a filter material available through a filter rod machine, a deflection device according to the invention includes.

The deflection device according to US 4,522,616 also works on a mechanical basis using a pulley. The strand coming from the pulley is introduced into a hopper by a forward flow of air from a nozzle located immediately in front of the hopper. This means that the nozzle is used exclusively to insert the strand into the hopper, whereby no distraction or deflection of the strand takes place. Due to the drive roller, which interacts with the deflection roller, the deflection of the filter tow is effected in a mechanical manner.

In a preferred embodiment, the deflection device is adapted such that the deflection of the at least one filter tow strand has at least one horizontal component. It has been found that due to the horizontal component of the deflection, the draw resistance and draw resistance scattering can be further improved. In contrast, the deflection device according to US 4,522,616 only a vertical deflection of the strand before.

The Transport device can at least one pneumatically operated transport jet have, whereby a particularly simple technical implementation the transport device is achieved because conventional transport nozzles used can be.

Preferably has the transport device on two transport nozzles, which in the field of Inlet side and the outlet side of the device are arranged. The use of two transport nozzles, of which one nozzle the other nozzle downstream, improves the flexibility of the manufacturing process. For example, you can the two nozzles with different pressures operated to the properties of the filter tow influence.

In A further embodiment of the invention comprises the deflection device at least one curvature arc, the at least partially the conveying path of the filter tow rope certainly. The use of a curve of curvature in connection with the deflection device has the advantage that a continuous deflection of the filter tow is achieved.

As a general rule holds that every component with a continuously curved structure, which causes a deflection of an air flow, such as a baffle, is suitable to implement the baffle.

Of the curvature arch can with the provided on the outlet side transport nozzle and / or with the transport nozzle provided on the inlet side, in particular solvable be connected. In this way, the curvature arc and the transport nozzle act directly together, thereby ensuring that the reversal pneumatic is driven or takes place pneumatically. Due to the detachable connection between the curve of curvature and the transport nozzle can each one of the two transport nozzles with a curvature or both transport nozzles each with a curvature arc be equipped.

Around the position of the arc of curvature or the variety of curvature arches either with regard to the transport nozzle or with regard to one opposite to set arranged curvature, can be provided that the curvature arc or the plurality the curvature curves rotatable or are arranged pivotally.

The lower limit of the curvature angle of the curvature arc may be at least 10 ° gene, with preferred ranges between 10 ° -80 °, 20 ° -60 ° and 30 ° -50 °.

A uniform transfer of the Filter tow strings from a bow to the associated further arc of curvature can be achieved by the fact that removed from the respective transport nozzle Ends of the curvature arches in alignment are arranged.

In a further preferred embodiment is provided that the curvature arches through a pipe section, in particular a rectilinear design Tube section are connected. This embodiment is particular for security reasons to be considered as preferred, since it avoids a fast running, unprotected Filter tow strand for Operating personnel accessible is.

moreover the pipe section is an effective means of reducing the length of the pipe Enlarge deflecting what leads to the positive effect, that pulsations muted especially at high processing speeds be critical. Increased Pulsations are related to those applied to the inlet nozzle higher pressures, the necessary to ensure proper feeding of the strand to ensure in the finger. Due to the short guide channels in conventional Umlenksystemen such pulsations are almost undamped transfer the format part of the machine. this leads to to an increased Scattering of the draw resistance, especially at high processing speeds. Furthermore reinforced the enlarged length of the Systems according to this embodiment the invention, the flowering effect (blooming effect).

Of the Pipe section may be at least partially perforated, which the escape of compressed air from the pipe section is made possible.

In a further preferred embodiment The invention relates to the pipe section with a feed device for feeding additives, such as activated carbon, plasticizers and / or provided for the supply of water. Due to the increased length of the Systems leads the feeding of additives and / or water in the pipe section too a homogeneous distribution of additives and / or water in the Filtertowstrang. moreover ensures the Infeed of water in the pipe section of the deflecting a safe separation of the water supply from the triacetin circulation, the anhydrous must be in order to avoid hydrolysis of the triacetin.

In another embodiment a free space is formed between the curvature arcs, whereby the release of chemical substances from the filter tow strand allows is added to the strand, before this in the deflection device introduced becomes.

Preferably is the deflection for a horizontal offset of the at least one filter tow strand of at least 5 cm, in particular from 5 to 50 cm, in particular from 10 to 40 cm, especially from 15-30 cm adjusted. A suitable length of Device to a good turbulence of the filter rod material is achieved when the longitudinal total length of the Device at least 200 mm, in particular 200-1000 mm, in particular 500-900 mm, especially 600-800 mm.

The The invention will be described below with reference to the attached drawings schematically illustrated embodiments explained in more detail. In show this:

1 a schematic side view of a preferred embodiment of a double-stranded filter rod machine according to the invention;

2 a plan view of the machine according to 1 ;

3 a side view in partial section of the stabilizing unit or deflection device of the machine according to 1 with parts omitted for the sake of clarity;

4 a section along the line IV-IV of the stabilization unit or deflection device according to 3 ;

5 a cross section through a further embodiment of the deflection device according to the invention comprising a pipe section;

6 a cross section through a further embodiment of the deflection device according to the invention, wherein the pipe section is perforated; and

7 a further embodiment of the deflection device according to the invention, which is adapted for a double-strand machine.

reference numeral 1 in 1 overall designates a double-strand machine for the production of cigarette filters. The machine 1 includes a format part with two format sections 2a . 2 B each to form continuous filter rods 3a . 3b as well as, for each format range 2a . 2 B , in each case a filter material supply 4a . 4b , The feeders 4a . 4b receive filter material from the conveyor line 5 that part of machine 1 forms and is between an inlet station 6 the feeders 4a . 4b and a storage area 7 extends, the two bales 8a . 8b made of filter material.

As in the 1 and 2 represented, are respective Lunten 9a . 9b from the bales 8a . 8b unwound and along the conveyor line 5 by a guide roller assembly 10a promoted at the infeed station 6 is arranged.

The conveyor line 5 comprises a double guide device 11 that are above the bales 8a . 8b to guide the Lunten 9a . 9b is arranged. The conveyor line 5 further comprises a suction device 12 , which are directly in the conveying direction before the management order 10a at the inlet station 6 is arranged to the lunts 9a . 9b in transversal direction into respective sectionally flat strips 13a . 13b to pull apart, the guide device 10a be supplied. After the leadership facility 10a be the two stripes 13a . 13b along the feeds or supply lines 4a . 4b in a substantially horizontal direction 14 by a pressing device 15 promoted, the a Führungsrollen- or brake roller assembly 10a and two drive roller assemblies 10b . 10c includes. The two stripes 13a . 13b are then along the respective feeders 4a . 4b in the direction 14 by an expansion device 16 promoted, the air in the strip 13a . 13b blows in to increase their volume. Then the stripes become 13a . 13b by a treatment device 17 transported, where chemical substances, especially triacetin, the strip 13a . 13b are added, so that the filter material moldability and / or flavor is imparted. Finally, the two strips 13a . 13b along the respective feeders 4a . 4b in the direction 14 by a drive roller assembly 10d promoted, similar to the arrangements 10b . 10c is constructed and a discharge area of the feeders 4a . 4b or feed lines 4a . 4b Are defined.

The feeders 4a . 4b are with the format sections 2a . 2 B of the format part by a stabilization unit or deflection device 18 connected to the roller assembly 10d is immediately downstream. The stabilization unit 18 gets the stripes 13a . 13b from the feeders 4a . 4b , collects the strips 13a . 13b evenly to form two strands of filter material and promotes the filter material strands to the format sections 2a . 2 B , In the two format sections 2a . 2 B Each strand of filter material is placed on a strip of paper 19a . 19b promoted, previously in a gumming station 20 was then transversely around the filter material strand to form a continuous filter rod 3a . 3b is wound.

At the exit of the format sections 2a . 2 B control one or more control stations 21 different quality characteristics of the filter rods 3a . 3b (eg density, diameter, appearance ...). A cutting head 22 cuts the bars 3a . 3b transversely in each subsequent filter sections (not shown).

As in the 3 . 4 shown comprises the stabilization unit 18 a housing 23 that is on the frame of the machine 1 is fixed and inside two laterally juxtaposed stabilizing sections 24a . 24b stops, which converge to reduce the distance between the two filter material strands.

Each stabilization track 24 includes an inlet funnel 25 in which the strip 13 from the feeder 4 is funded, and a downstream discharge funnel 26 , through which the filter tow strand to the format range 2 is encouraged. The entry funnel 25 and the discharge funnel 26 each have a nozzle, with the aid of a drive gas flow, in particular air flow, is generated to promote the strand. The funnels 25 . 26 therefore each act as a transport nozzle. Every funnel 25 has a straight central axis of symmetry 27 on, which runs parallel to the conveying direction, or in the conveying plane of the strip 13 in the area of the feeder 4 lies. Each outlet funnel 26 also has a rectilinear central axis of symmetry 28 on, with respect to the conveying direction of the filter material strand from the inlet funnel 25 and with respect to the conveying direction of the filter material strand along the format section 2 inclined. Between the respective inlet funnel 25 and outlet funnel 26 a tubular deflecting part is arranged, in particular a curvature arc 29 of a curved portion for deflecting the conveying direction of the filter material strand from the inlet funnel 25 having. Every curve of curvature 29 is preferably directly to the outlet of the inlet funnel 25 connected.

To further improve the homogeneity of the filter material in the filter material strand, air is introduced into each hopper 25 . 26 blown. Specifically, each funnel includes 25 . 26 a tubular body 30 with a narrow tapered entry area (ie with a gradually decreasing flow channel diameter) and a cylindrical intermediate section (ie with a constant flow channel diameter). Every funnel 25 . 26 further comprises a slightly expanding further tubular body 31 (ie with a gradually increasing flow channel diameter) corresponding to the tubular body 30 is subordinate.

The tubular body 30 is in the other tubular body 31 screwed in, whereby zwi rule an outer surface of the tubular body 30 and an inner surface of the further tubular body 31 a tubular air flow channel 32 is limited, in the plurality of injection openings 33 open out the inner surface of the tubular body 30 break through in the cylindrical intermediate section. supply channels 34 are in the other tubular body 31 formed by, in operation, compressed air in the tubular channel 32 and from there through the injection openings 33 in the flow channel of the tubular body 30 is introduced.

The injection openings 33 in the inlet funnel 25 are, with respect to the central axis of symmetry 27 Oriented so that the air flow an axial component, ie a component parallel to the central axis of symmetry 27 , is imprinted.

In a modification are the injection openings 33 in the inlet funnel 25 with respect to the central axis of symmetry 27 oriented such that the air flow both an axial component and a radial component (ie perpendicular to the central axis of symmetry 27 ) is imprinted. Here, the axial air flow component prevails, which serves to filter the material through the inlet funnel 25 whereas the radial airflow component serves to swirl the airflow.

The injection openings 33 in the outlet funnel 26 are with respect to the central axis of symmetry 28 oriented such that primarily an axial component (ie parallel to the central axis of symmetry 28 ) is impressed on the air flow, whereby the feed acting on the filter material is maximized.

During assembly and adjustment of the stabilization unit 18 may be the air flow area of each tubular channel 32 be adjusted by the tubular body 13 in the other tubular body 31 screwed in and out, whereby the air velocity and flow through the injection openings 33 be set.

It should also be noted that the filter rod material between each inlet funnel 25 and outlet funnel 26 through the open space 35 is promoted, the filter rod material moves freely, ie without a guide part.

In modification of the in the 1 to 4 Illustrated embodiments, each funnel 25 with the corresponding funnel 26 be connected by a perforated tubular expansion part.

The open space 35 , through which the filter rod material is moved freely, allows an expansion of the through the injection openings 33 each inlet funnel 25 injected compressed air, whereby unwanted backpressure phenomena are avoided. Furthermore, it is thereby made possible that the filter rod material releases excess chemical substances which are present in the treatment device 17 were added. To collect and remove the chemical substances released from the filter rod material, the housing is 23 arranged inclined downwards and has at the lowest point a collecting channel, which leads to a catch basin. To avoid that released from the filter rod material chemical substances from the housing 23 escape and the rest of the machine 1 contaminate, is the case 23 is substantially sealed and has only outlet openings, which in a central region of the housing 23 arranged and shielded against direct spraying.

For a free expansion of the through the blow holes 33 in each outlet funnel 26 To allow injected compressed air (and thus avoid unwanted backpressure phenomena), is each discharge funnel 26 with a slightly conical, perforated tubular body 37 provided with a plurality of openings 38 has and the discharge funnel 26 is immediately downstream. The passage openings 38 in each perforated tubular body 37 are preferably only on top of the perforated tubular body 37 arranged a downward air flow, ie one on the format section 2 directed air flow to avoid.

In an alternative embodiment, not shown, each stabilization path comprises 24 the stabilization unit 18 one, two or more intermediate funnels between the inlet funnel 25 and the discharge funnel 26 arranged and identical as the funnels 25 . 26 are constructed.

In a further embodiment, not shown, the machine described above 1 designed as a single-strand machine and therefore includes a format part with a format section 2 to form a continuous filter rod 3 and a filter material supply 4 , In this case, the stabilization unit or deflection device comprises 18 a stabilization section 24 with inlet and outlet funnels described above 25 . 26 , Similarly, the machine described above 1 be designed as a triple or quadruple strand machine and thus a format part with three or four format plug 2 to form three or four continuous filter rods 3 and three or four filter material feeds 4 include. In this case, the Stabilisierungsein unit or deflection device 18 three or four stabilization sections 24 on, each with the above-described inlet and outlet funnels 25 . 26 are equipped.

The with the stabilization unit or deflection device described above 18 Fabricable filter material exhibits excellent homogeneity and, at least in terms of homogeneity, is superior to filter materials made with stabilizer units currently available on the market.

The drive roller assemblies 10b . 10c . 10d differ along the feeders 4a . 4b in size and arrangement, but are functionally identical. The following description therefore relates only to one of the drive roller assemblies 10b . 10c . 10d which, for the sake of simplicity, has the reference number 10 referred to as. Each drive roller assembly 10 includes for each feeder 4 a drive roller, which is rotated by a motor independently of the motors of the other rollers, as well as a freely rotating roller, which rests against the drive roller and cooperates with this. The two motors of the two drive rollers of each drive roller assembly 10 can on the same side of the feeders 4 be arranged in the machine frame. Alternatively, in each drive roller assembly 10 the motor of a drive roller in the frame of the machine 1 and the motor of the other drive roller may be disposed adjacent to the drive roller.

Below is the deflection, which also serves as a stabilization unit 18 is described in more detail.

As in the 3 . 4 shown, the deflection device essentially has a deflection device 50 and a transport device 40 on, which interact with each other such that the deflection of the filter tow line 13 , which is moved by the deflecting device, takes place pneumatically.

There are various ways to realize the deflection technically. For example, it is possible, as in the 3 . 4 represented, a curve of curvature 29 to be used with the pneumatically operated transport nozzles 25 . 26 connected is. In the in the 3 . 4 Examples shown are only the transport nozzles 25a . 25b on the inlet side of the deflector 18 each with a curvature arc 29a . 29b Mistake.

It is also possible only the transport nozzles 26a . 26b to be provided on the outlet side of the deflecting device in each case with a curve of curvature (not shown). Another option is to use both the transport nozzles 26 on the outlet side as well as the transport nozzles 25 on the inlet side of the deflecting device with respective bends 29 equip ( 5 - 7 ).

In general, it is possible to arrange the curve of curvature either of the associated transport nozzle in the conveying direction, as in 3 . 4 represented, which means that the strand pneumatically, so by the supply of compressed air, through the arc of curvature 29 is pressed. If the arc of curvature 29 is arranged in the conveying direction above the respective transport nozzle, as in the 5 - 7 for the transport nozzle 26 shown on the outlet side of the deflecting device, the strand is through the arc of curvature 29 sucked.

It is also possible, the curvature 29 to arrange in the conveying direction above and / or below the respective nozzle, the alternative to arrange the arc of curvature in the conveying direction below the nozzle and thus to press the strand pneumatically through the arc of curvature, leads to better results in terms of draw resistance and Zugwiderstandstreuung the filter material.

In 4 , as well as in the 5 - 7 you can see that the deflector 50 is adapted to effect a deflection of the filter tow string in a direction comprising at least one horizontal component. In the in 3 As shown, the deflection is carried out with both a horizontal and a vertical component, since the entire deflection device is arranged inclined with respect to a horizontal plane.

redirection This means in general that the conveying direction at least once changed becomes.

For the technical realization of the deflection device 50 can the curvature bends 29 be replaced by other means, for example by components with an open structure, in particular by a curved baffle plate, the pneumatic transport device 40 assigned. The curved baffle plate can be used to achieve the desired offset of the filter tow 13 while continuously redirecting the filter towline.

In general, components for the technical implementation of the deflection 50 be used, which allow a continuous and pneumatically driven deflection of the filter tow. This means that the diverter 50 should have at least one continuously curved wall which limits the guide path of the filter tow line at least in sections and at the same time changes the conveying direction. Alles Common comprises the deflection 50 a diverter disposed between an inlet funnel or an infeed transport nozzle and an outlet funnel or a spout transport nozzle. The deflection part may be tubular and comprises a curved section for deflecting the conveying direction of the filter material strand or the sliver coming from the inlet funnel or the inlet transport nozzle.

If the deflection device is to be used in a double-strand machine, it is advantageous to change the conveying direction such that the two strands are fed to one another, ie converge ( 4 ). The strands can then be fed to the infeed system of a format part of the machine. In other cases, it may be useful to redirect the strand in a different direction, for example, when two separate format parts are used, which are arranged spaced from each other.

The device is made even more flexible when the bends 29 detachable with the respective transport nozzle 25 . 26 are connected because the device can then be adapted to different process conditions. Moreover, the curvature bends 29 be arranged pivotally or rotatably, whereby the direction under which the strands the respective arc of curvature 29 leave, can be changed. The curve of curvature 29 on the inlet side and the arc of curvature 29 on the outlet side of the device can be easily aligned by the respective curvature arcs 29 be pivoted accordingly.

As in 4 Recognizable, is every curve of curvature 29a . 29b oriented on the inlet side of the device such that the central axis of symmetry of the free end of the arc of curvature 29a . 29b the central axis of symmetry of the remote transport nozzle 26a . 26b on the outlet side of the device in the inlet plane. This orientation of the curve of curvature 29a . 29b with regard to the transport nozzles 26a . 26b on the outlet side of the device ensures a uniform transfer of the strand 13 from the respective curve of curvature 29a . 29b to the transport nozzles 26a . 26b ,

The embodiment according to the 3 . 4 relates to a deflection device, which is a free space 35 between the curves of curvature 29a . 29b and the outlet transport nozzles 26a . 26b having. Alternatively, it is also possible to have a pipe section 51 , in particular a straight pipe section 51 to provide a curvature arc 29 on the inlet side of the device and a curve of curvature 29 ' on the outlet side of the device connects. To achieve the desired offset of the system, the two bends are 29 . 29 ' curved in opposite directions, the central axis of symmetry of the curvature arcs 29 . 29 ' coaxial with the central axis of symmetry of the respective transport nozzle 25 . 26 is parallel. Moreover, the ends of the respective curvature arcs are aligned 29 . 29 ' coming from the respectively assigned transport nozzle 25 . 26 are arranged away, so that the pipe section 51 between the two curves of curvature 29 . 29 ' can be fitted.

The pipe section 51 represents an extremely effective means to increase the length of the pipe system. This enhances the turbulence of the filter material that can be achieved with the system and the blooming effect. The pipe section 51 does not necessarily have to extend straight. It is also possible to use a pipe section which, at least in sections, has bends or is generally curved.

As in 6 shown, the pipe section 51 be perforated to allow compressed air to escape through the transport nozzle 25 was supplied on the inlet side of the device.

In a further preferred embodiment of the invention, which is not shown in the figures, a supply device is associated with the pipe section, which allows the feeding of additives, such as activated carbon, plasticizer or other substances into the filter tow line. Moreover, the feeder can be used to feed water into the strand, thereby affecting the cure time. A special advantage of the pipe section 51 is that the length of the system is increased. This makes it possible that the injected additives and / or the injected water is distributed homogeneously over the length of the pipe section in the filter tow line. The quality of the filter rods, which are produced with a machine comprising such a deflection device, can thus be significantly improved.

With regard to the dimension of the deflection device, it is advantageous that the horizontal offset of the deflection 50 is at least 5 cm. A preferred range is 5-50 cm, in particular 10-40 cm, in particular 15-30 cm. The total longitudinal length of the device should be at least 200 mm. This means that the axial distance between the inlet side and the outlet side of the device is at least 200 mm. Preferred ranges are from 200-1000 mm, in particular 500-900 mm, in particular 600-800 mm.

The angle of curvature of each curvature bo gens is at least 10 °. The curvature angle is the acute angle between the two central axes of symmetry of a curvature arc. The angle of curvature in 7 is denoted by a. Preferred ranges are between 10 ° -80 °, in particular 20 ° -60 °, in particular 30 ° -50 °.

The deflecting device described above can be used for both a single-stranded as well as a double-strand machine, the embodiments provided for the single-strand machine in the 5 and 6 and provided for the double-strand machine embodiments in the 1 - 4 and 7 are shown.

The pipe systems according to the 5 - 7 can also be in a housing 23 be arranged, as for the deflection 50 according to the 1 - 4 intended.

In summary improves the device according to the invention the draw resistance and draw resistance spread due to the combined Deflection and pneumatic conveying, which leads to an improvement of the turbulence in the system and thus too an elevated one homogeneity of the filter material leads.

moreover allow the deflection devices described above, an attenuation of Pulsations at higher Processing speeds occur. The damping of the pulsations takes place due to the increased length of the Conveying path, especially in connection with the use of a pipe section between two associated bends the inlet and outlet side of the device. That way too the flowering effect be improved.

1

machine

2a, 2 B

format routes

3a, 3b

filter rods

4a, 4b

additions

5

conveyor line

6

infeed station

7

storage area

8a, 8b

bale

9a 9b

fuse

10a

Guide roller assembly

10b, 10c

Drive roller assembly

10d

roller assembly

11

Double guide device

12

suction

13a, 13b

strand

14

horizontal direction

15

presser

16

expander

17

conditioning device

18

stabilization arrangement or deflection device

19a, 19b

strip made of rubberized paper

20

gumming

21

control station

22

cutting head

23

casing

24a, 24b

stabilization routes

25 26

transport jets

27.28

axes of symmetry

29

curvature arch

30

tubular body

31

Another tubular body

32

air duct

33

injection openings

34

supply channels

35

free space

36

outlet

37

perforated tubular body

40

transport means

50

deflecting

51

pipe section

Claims (51)

Deflection device for conveying and deflecting at least one filter tow strand ( 13 ) with a format part ( 2a . 2 B ), in particular an inlet system of a machine for the production of filter rods is coupled, characterized by a transport device ( 40 ) for the pneumatic conveying of the at least one filter tow strand ( 13 ) and a deflection device ( 50 ) connected to the transport device ( 40 ) for substantially pneumatically driven deflection of the filter tow strand ( 13 ) cooperates. Apparatus according to claim 1, characterized in that the deflection device ( 50 ) is adapted such that the deflection of the at least one filter tow line ( 13 ) has at least one horizontal component. Apparatus according to claim 1 or 2, characterized in that the transport device ( 40 ) at least one pneumatically operated transport nozzle ( 25 . 26 ) having. Apparatus according to claim 3, characterized in that the transport device ( 40 ) two transport nozzles ( 25 . 26 ), which are arranged in the region of the inlet side and the outlet side of the device. Apparatus according to claim 4, characterized in that the transport nozzle ( 26 ) on the outlet side of the device at least one central axis of symmetry ( 28 ), which are rectilinear and in view of the conveying direction of the filter tow rope is slightly inclined. Device according to at least one of claims 3 to 5, characterized in that the transport nozzles ( 25 . 26 ) Injection openings ( 33 ), in particular for the injection of compressed air. Apparatus according to claim 6, characterized in that the transport nozzles ( 25 . 26 ) each have a downstream in the conveying direction second tubular body ( 31 ), wherein the first tubular body ( 30 ) in the second tubular body ( 31 ) and between the outer surface of the first tubular body ( 30 ) and the inner surface of the second tubular body ( 31 ) an annular air duct ( 32 ) is formed, which leads to the injection openings ( 33 ) is open. Device according to claim 7, characterized in that the first tubular body ( 30 ) comprises a strongly tapered input section and a cylindrical intermediate section and the second tubular body ( 31 ) is slightly widened. Apparatus according to claim 7 or 8, characterized in that the injection openings ( 33 ) arranged on the inlet side transport nozzle ( 25 ) with respect to the central axis of symmetry ( 27 ) are arranged so that the air flow is impressed both an axial and a radial component. Apparatus according to claim 7 or 8, characterized in that the injection openings ( 33 ) arranged on the inlet side transport nozzle ( 25 ) with respect to the central axis of symmetry ( 27 ) are arranged so that the air flow is impressed primarily an axial component. Device according to at least one of claims 7 to 10, characterized in that the injection openings ( 33 ) arranged on the outlet side transport nozzle ( 26 ) with respect to the central axis of symmetry ( 28 ) are oriented so that the air flow is primarily impressed on an axial component. Device according to at least one of claims 4 to 11, characterized in that the transport nozzle arranged on the outlet side ( 26 ) with a perforated tubular body ( 37 ) having a number of passage openings ( 38 ) and arranged on the outlet side transport nozzle ( 26 ) is subordinate directly in the conveying direction. Apparatus according to claim 12, characterized in that the passage openings ( 38 ) in the perforated tubular body ( 37 ) only on the top of the perforated tubular body ( 37 ) are designed to avoid that in operation, an air stream is directed to a format band of the machine for the production of filter rods. Device according to at least one of claims 1 to 13, characterized in that the deflection device ( 50 ) at least one arc of curvature ( 29 ), which at least in sections the conveying path of the filter tow strand ( 13 ) certainly. Apparatus according to claim 14, characterized in that in each case a curvature arc ( 29 ) with the transport nozzle provided on the outlet side ( 26 ) and / or the transport nozzle provided on the inlet side ( 25 ), in particular detachably connected. Device according to claim 14 or 15, characterized in that the curvature arc ( 29 ) or the curvature arches ( 29 ) are rotatably arranged. Device according to at least one of claims 14 to 16, characterized in that a curvature angle of the curvature arcs ( 29 ) is at least 10 °, in particular between 10 ° -80 °, in particular between 20 ° -60 °, in particular between 30 ° -50 °. Device according to at least one of claims 15-17, characterized in that the of the respective transport nozzle ( 25 . 26 ) distal ends of the curvature arches ( 29 ) are arranged in alignment. Device according to at least one of claims 15-18, characterized in that the curvature arcs ( 29 ) through a pipe section ( 51 ), in particular a rectilinear pipe section ( 51 ) are connected. Device according to claim 19, characterized in that the pipe section ( 51 ) is perforated at least in sections. Apparatus according to claim 19 or 20, characterized in that the pipe section ( 51 ) is connected to a feed device for feeding additives, such as activated carbon, plasticizer and / or for feeding water. Device according to at least one of claims 15 to 18, characterized in that between the curvature arcs ( 29 ) a free space ( 35 ) is trained. Device according to at least one of Claims 1 to 22, characterized in that the deflection device ( 50 ) for a horizontal offset of the at least one filter tow ( 13 ) of at least 5 cm, in particular from 5 to 50 cm, in particular from 10 to 40 cm, in particular from 15 to 30 cm. Device according to at least one of claims 1 to 23, characterized in that the longitudinal total length of the Device at least 200 mm, in particular 200-1000 mm, in particular 500-900 mm, especially 600-800 mm. Device according to at least one of claims 1 to 24, characterized in that at least the deflection device ( 50 ) in a housing body ( 23 ) is arranged. Device according to claim 25, characterized in that the housing body ( 23 ) is arranged inclined downwards and at the lowest point has a collecting channel which leads to a collecting tank in order to pass out of the filter tow line (FIG. 13 ) dissipate released chemical substances. Device according to claim 25 or 26, characterized in that the housing body ( 23 ) is substantially sealed and outlet openings ( 36 ) for compressed air, which are shielded against direct spray. Device according to at least one of claims 1 to 27, characterized in that the transport device ( 40 ) and the deflection device ( 50 ) are designed to guide a single strand or a double strand. Machine for the production of filter rods with a deflection device according to at least one of the preceding claims. Machine according to claim 29, characterized in that the deflection device between a feed roller and a format part ( 2a . 2 B ), in particular an intake system is arranged. Machine according to claim 29 or 30, characterized that the machine is a single-strand and a double-strand machine includes. Method of conveying and deflecting at least one filter tow, in which the at least a filter tow strand is pneumatically conveyed and thereby deflected. Contraption ( 1 ) for producing cigarette filters with a number of feeds ( 4 ) for respective continuous strips ( 13 ) of filter material; a number of format parts ( 2 ) for forming respective continuous filter rods ( 3 ); and a stabilization device ( 18 ), between the feeders ( 4 ) and the format parts ( 2 ), characterized in that the stabilization device ( 18 ) a number of stabilization links ( 24 ), each having an inlet funnel ( 25 ) into which the strip from the feeder ( 4 ) and a downstream discharge funnel ( 26 ), through which a filter material strand the format part ( 2 ) is supplied. Device according to claim 33, wherein the stabilizing sections ( 24 ) of the stabilization device ( 18 ) Are arranged side by side and converge to reduce the distance between the filter material strands. Apparatus according to claim 33 or 34, wherein each inlet funnel ( 25 ) a central axis of symmetry ( 27 ) which runs in a straight line and parallel to the conveying direction or in the conveying plane of the strip (FIG. 13 ) from the conveyor line ( 4 ) lies. Device according to one of claims 33 to 35, wherein between each inlet funnel ( 25 ) and discharge funnel ( 26 ) a deflecting part ( 29 ) is arranged, which is tubular and has a curved portion for deflecting the conveying direction of the filter material strand from the inlet funnel ( 25 ). Device according to claim 36, wherein each deflecting part ( 29 ) directly to the outlet of the inlet funnel ( 25 ) connected is. Device according to one of claims 33 to 37, wherein each outlet funnel ( 26 ) a central axis of symmetry ( 28 ), which are rectilinear and slightly inclined with respect to the conveying direction of the filter rod material from the inlet funnel (FIG. 25 ) and with respect to the conveying direction of the filter material strand along the format part ( 2 ) runs. Device according to one of claims 33 to 38, wherein air is introduced into each funnel ( 25 . 26 ) through injection openings ( 33 ) blown into the funnel ( 25 . 26 ). Apparatus according to claim 39, wherein each funnel ( 25 . 26 ) a first tubular body ( 30 ) and a second tubular body ( 31 ) associated with the first tubular body ( 30 ) is arranged downstream in the conveying direction, wherein the first tubular body ( 30 ) in the second tubular body ( 31 ) is screwed, whereby between an outer surface of the first tubular body ( 30 ) and an inner surface of the second tubular body ( 31 ) a tubular air flow channel ( 32 ) defined in the injection opening ( 33 ) opens. Apparatus according to claim 40, wherein the first tubular body ( 30 ) comprises a narrow tapered start section and a cylindrical intermediate section, and the second tubular body (FIG. 31 ) expands slightly. Apparatus according to claim 40 or 41, wherein the injection openings ( 33 ) of each inlet funnel ( 25 ) with respect to the central axis of symmetry ( 27 ) are inclined so that the air flow is impressed both an axial component and a radial component. Apparatus according to claim 40 or 41, wherein the injection openings ( 33 ) of each inlet funnel ( 25 ) with respect to the central axis of symmetry ( 27 ) are inclined so that the air flow is impressed only an axial component. Device according to one of claims 40 to 43, wherein the injection openings ( 33 ) of each discharge funnel ( 26 ) with respect to the central axis of symmetry ( 28 ) are inclined so that the air flow is impressed only an axial component. Device according to one of claims 33 to 44, wherein between each inlet funnel ( 25 ) and discharge funnel ( 26 ) the filter material strand through a free space ( 35 ) is promoted, in which the filter material strand runs freely without guide parts. Device according to claim 45, wherein the stabilization device ( 18 ) a housing or a box ( 23 ) comprising the stabilizing links ( 24 ) inside. Apparatus according to claim 46, wherein the box ( 23 ) for collecting and discharging chemical substances that are released from the filter material strand, is inclined downwards and at the lowest point has a collecting channel, which leads to a collecting tank. Apparatus according to claim 46 or 47, wherein the box ( 23 ) is substantially sealed and openings ( 36 ) for draining the compressed air, which are shielded against direct spraying. Device according to one of claims 33 to 48, wherein each discharge funnel ( 26 ) with a perforated tubular body ( 27 ), which has a number of passage openings ( 38 ) and in the conveying direction the discharge funnel ( 26 ) is immediately downstream. Apparatus according to claim 49, wherein the passage openings ( 38 ) in each perforated tubular body ( 37 ) only on the top of the perforated tubular body ( 37 ) are formed in order to avoid that the air flow on the format part ( 2 ). Device according to one of Claims 33 to 50, in which each stabilization path ( 24 ) of the stabilization device ( 18 ) comprises at least one intermediate funnel which is located between the inlet funnel ( 25 ) and the discharge funnel ( 26 ) is arranged.