DE102010000680A1 - Production of filter strands and filter rod machine - Google Patents

Abstract

The invention relates to a method and a filter rod machine in the tobacco-processing industry for producing filter rods. The method for producing a filter rod in the tobacco processing industry using a filter rod machine has the following process steps: feeding a first filter material and a second filter material consisting of granules, the granules being provided by means of a granulate feed device, to a suction rod conveyor, Filter materials on the suction line conveyor, so that a filter material strand is formed, with filter material passing through the suction line conveyor being collected, - the separated filter material consisting of granules being separated from the collected filter materials and being returned to the granule feed device, with a first metering device (53.A , 55.A) and in a second metering device (53.B, 55.B) of the granulate feed device (50) each granulate (A; B) is provided for the second filter material consisting of granulate and where there s separated filter material consisting of granules, which has a granule mixture (A / B), is conveyed to a third metering device (53.C, 55.C) of the granulate feed device (50) and the granulate mixture (50) in the third metering device (53. C, 55.C) is provided for the second filter material consisting of granules.

Description

The invention relates to a method and a filter rod machine of the tobacco processing industry for the production of filter strands.

Out EP 1 464 241 A1 For example, there is known a method for producing a nonwoven fabric for the manufacture of filters of the tobacco processing industry, and a filter strand production device. In this case, isolated filter material is conveyed to a fluidized bed and conveyed by means of a transport air flow in the direction of a strand-building device to be aufauert on the strand-building device. The strand building device comprises a suction belt conveyor. Subsequently, the formed fiber strand is conveyed in a formatting device and formed there, for example, to a round fiber strand, wrapped with a wrapping material, to be cut to length, so that filter rods of multiple use length can be provided.

• – Zuführen von vereinzelten Filtermaterialien zu einem Fließbett,
• – Transportieren des Filtermaterials in dem Fließbett im Wesentlichen mittels eines Transportluftstromes in Richtung einer Strangaufbauvorrichtung und
• – Aufschauern des Filtermaterials auf der Strangaufbauvorrichtung.

From EP 1 464 241 A1 The known filter strand production device also has the feature that the filter material can be conveyed in a fluidized bed from the filter material supply device to the strand construction device. The process disclosed in this prior art is characterized by the following process steps:

• Feeding of separated filter materials to a fluidized bed,
• - Transporting the filter material in the fluidized bed substantially by means of a transport air flow in the direction of a strand building apparatus and
• - Churning of the filter material on the strand building device.

• – Vereinzeln von Fasern wenigstens einer Sorte Filtermaterials in einer Vereinzelungsvorrichtung,
• – Zuführen der vereinzelten Fasern zu einem Förderer, der sich in einer Förderrichtung bewegt,
• – Aufschauern der vereinzelten Fasern auf dem Förderer, wodurch sich ein Vlies bildet, wobei die Vereinzelungsvorrichtung wenigstens ein Vereinzelungselement umfasst, das um eine Rotationsachse rotiert, wobei die Rotationsachse im Wesentlichen parallel der Förderrichtung des Förderers ausgerichtet ist.

Out EP 1 464 240 A1 Furthermore, a method and an apparatus for producing a web for the production of filter rods is known, wherein the method is characterized by the following method steps:

• Separating fibers of at least one sort of filter material in a separating device,
• Feeding the singulated fibers to a conveyor moving in a conveying direction,
• - Churning of the individual fibers on the conveyor, whereby a nonwoven forms, wherein the separating device comprises at least one separating element which rotates about a rotation axis, wherein the rotation axis is aligned substantially parallel to the conveying direction of the conveyor.

The device described therein is characterized in that separating devices are provided which are designed separately from each other.

The devices in the two cited European patent applications process finite fibers, so that nonwovens, filter rods and filters are made of finite fibers and optionally other filter components such as granules.

Besides, it is off DE 10 2006 018 102 A1 a method for producing filter rods of the tobacco processing industry comprising fibers of finite length from two different fiber types, wherein the fibers are brought together and mixed immediately prior to a singulation step.

Moreover, in DE 10 2006 028 382 A1 describes a method for operating a filter rod machine, wherein a Saugstrangförderer a first filter material made of finite fibers and a second filter material, which consists of granules, are supplied.

Based on this prior art, it is an object of the invention to improve the provision of filter materials in the production of filter strands of fibers of finite length, in particular, the design complexity should be as low as possible.

• – Zuführen von einem ersten Filtermaterial und einem zweiten aus Granulat bestehenden Filtermaterial, wobei das Granulat mittels einer Granulatzuführeinrichtung bereitgestellt wird, zu einem Saugstrangförderer,
• – Aufschauern der Filtermaterialien auf dem Saugstrangförderer, so dass sich ein Filtermaterialstrang bildet, wobei durch den Saugstrangförderer hindurchtretendes Filtermaterial aufgefangen wird,
• – wobei das aus Granulat bestehende Filtermaterial aus den aufgefangenen Filtermaterialien separiert wird und als separiertes Granulat zur Granulatzuführeinrichtung rückgeführt wird,

das dadurch weitergebildet wird, dass in einer ersten Dosiereinrichtung und in einer zweiten Dosiereinrichtung der Granulatzuführeinrichtung jeweils Granulat für das zweite aus Granulat bestehende Filtermaterial bereitgestellt wird und dass das separierte Granulat, das eine Granulatmischung aufweist, zu einer dritten Dosiereinrichtung der Granulatzuführeinrichtung für die Granulatmischung gefördert wird und die Granulatmischung in der dritten Dosiereinrichtung für das zweite aus Granulat bestehende Filtermaterial bereitgestellt wird.This object is achieved by a method for producing a filter rod of the tobacco processing industry using a filter rod machine with the following method steps:

• Supplying a first filter material and a second granular filter material, wherein the granules are provided by means of a granule feed device, to a suction strand conveyor,
• - churning of the filter materials on the Saugstrangförderer, so that a filter material strand is formed, which is collected by the Saugstrangförderer passing filter material,
• - Wherein the filter material consisting of granules is separated from the collected filter materials and is recycled as granulated granules to Granulatzuführeinrichtung,

which is developed by the fact that in a first metering device and in a second metering of Granulatzuführeinrichtung granules for each of the second granular filter material is provided and that the separated granules having a granule mixture is conveyed to a third metering device Granulatzuführeinrichtung for the granules and providing the granule mixture in the third metering device for the second granular filter material.

The invention is based on the idea that for the second filter material, which is used for the production of filter strands of finite fibers in combination with at least one other, ie first, filter material made of fibers, a granular mixture of pure, that is not mixed, granules in at least is provided in each case a metering device, so that unmixed, ie pure granules of a second grade is introduced in a first metering device, for example unmixed granules of a first grade and in a second metering device, by dispensing granules from the first and second metering a granule mixture for the second (non-fibrous) filter material is obtained.

Furthermore, filter material that does not serve to form the filter material strand, as it passes through, for example, a suction belt of Saugstrangförderers or is sucked past the suction belt, so lost for strand formation, collected. The collected filter material contains the granulate mixture, which is, for example, separated in a demixing device, the separated granulate mixture obtained from the collected filter material being recycled to a third metering device of the granule feed device so that the third, metered, granulated mixture for the second filter material is made available from the third metering device is used. As a result, two (pure) granules in the first and the second metering device and in the third metering device a granulate mixture of the two (pure) granules are kept ready at the Granulatzuführeinrichtung, wherein the granule mixture recovered from the collected filter materials and separated by a segregation process or screening process and the separated granulate mixture is pneumatically conveyed for example by a return line or the like of the third metering device.

In particular, in the operation of the filter rod machine is provided that the collected filter materials are recycled to at least a portion of the filter rod machine, which is in the conveying direction of the filter materials upstream of feeding to the Saugstrangförderer, wherein prior to supplying the second filter materials to the Saugstrangförderer the filter materials, for example in a Separating device separated or separated from each other.

The term granules also powder is understood. In particular, the granules or powder serves to enhance the smoke-absorbing or adsorbing properties of the filter. The granules can also serve to release flavoring substances in the filter when smoking a cigarette. Furthermore, the granules used are non-fibrous filter material.

For example, as the first (pure) granules activated carbon (Charcoal) and as a second (pure) granules a binder granules or hot melt or the like are filled in the first and second metering device.

For this purpose, it is provided in one embodiment of the method that the Saugstrangförderer as a second filter material from the third metering device consisting of a granular mixture separated granules and / or two granules are respectively supplied from the first and the second metering device.

In addition, it is advantageous if a predetermined amount of granular mixture is supplied to the suction belt conveyor from the third metering device for the separated granules consisting of granular mixture.

According to a preferred development of the method, it is provided that the granulate discharged from the first and second metering devices of the granule feed device and / or the granulate mixture discharged from the third metering device of the granulate feed device is combined in a collecting region and that the filter material provided in the collecting region is fed to the suction strand conveyor. In this case, it is provided within the scope of the invention that the collecting area for the granules released and the granulate mixture from the separate metering devices can also be designed as a mixing area or is.

Moreover, according to one embodiment of the method, the fill level of the granules or of the granulate mixture in the separate metering devices is detected in each case.

Preferably, the granules and / or the granule mixture from a respective supply or the like are introduced into the metering devices.

In addition, it is preferred if a regulating device and / or control device for the metering devices for the granules and the granule mixture are provided, wherein in particular using the control device and / or using the control device, the granules and the granular mixture in a predetermined ratio or mixing ratio for the second filter material is provided. The control device and / or control device are connected in one embodiment with level sensors of the metering devices, so that the level the metering devices is monitored and, depending on the fill levels, the addition as well as the removal or delivery of the granules and of the granulate mixture are regulated or controlled correspondingly for the provision of a second filter material.

The object of the invention is also achieved by a filter rod machine of the tobacco processing industry for producing a filter strand of the tobacco processing industry with a first Filtermaterialzuführeinrichtung for supplying a first filter material and a second, designed as Granulatzuführeinrichtung Filtermaterialzuführeinrichtung for supplying a second granular filter material to a Saugstrangförderer and a suction belt conveyor forming a filter material strand from the first and second filter materials conveyed to the suction belt conveyor, a catcher for filter material passing through the suction belt conveyor, and separating means for separating the granules from the filter materials from the catcher and a recirculation recirculator of the separated granules to Granulatzuführeinrichtung, which is further developed, the s the Granulatzuführeinrichtung has a plurality of separate metering devices, so that from a first and second metering granules each and from a third metering device, the separated granules having a granular mixture, the Saugstrangförderer can be fed.

For this purpose, it is provided in a development of the filter rod machine that the return means for returning the separated granules with the third metering device of Granulatzuführeinrichtung is connected.

In particular, it is advantageous if a collecting area is provided, so that the granulate and / or granular mixture discharged from the respective metering devices of the granulate feeding device is brought together in the collecting area and that the filter material provided in the collecting area can be fed to the suction strand conveyor.

Preferably, the metering of Granulatzuführeinrichtung each have at least one or more level sensors, whereby the level of the granules or the granule mixture is monitored in the respective metering device or can be, so that, for example, filling shafts of the metering device are always sufficiently filled in operation.

In addition, advantageously, the Granulatzuführeinrichtung on a granule accelerating device which accelerates granules in the direction of Saugstrangförderers and emits in a suction shaft of Saugstrangförderers, so that from the Saugstrangförderer supplied filter materials, a filter strand of fibers of finite length is produced, the filter strand in addition to fibers of finite length further constituents has a plurality of granules or a granule mixture.

Furthermore, it is proposed for the design of the filter rod machine, that a control device and / or a control device is provided for the metering devices, wherein in particular the at least one level sensors of the metering devices are connected to the control device and / or the control device to operate the metering devices according to, a predetermined mixing ratio of the (pure) granules and the granulate mixture is formed or adjusted by the operation of the metering devices. Moreover, it is also possible that the metering device is kept filled during operation. For example, the individual metering devices each have a hopper and a metering roll, wherein by means of the metering roller granules and / or a granular mixture are metered from the hopper.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Embodiments of the invention may satisfy individual features or a combination of several features.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings, reference being expressly made to the drawings with respect to all in the text unspecified details of the invention. Show it:

1 a schematic sectional view of an apparatus for producing filter strands of finite fibers with a Granulatzuführeinrichtung,

2 An embodiment of a Granulatzuführeinrichtung invention in a schematic sectional view,

3 schematically a sectional view of another embodiment of a Granulatzuführeinrichtung and

4 schematically a sectional view of another embodiment of Granulatzuführeinrichtung.

In the following figures, identical or similar elements or corresponding parts are provided with the same reference numerals, so that a corresponding renewed idea is dispensed with.

1 shows a sectional view through an apparatus for producing filter strands of finite fibers. In a fiber processing device 10 become fibers 12 a first type of fiber and fibers 13 a second type of fiber through a first feed tube 14 and a second feed tube 15 in a first stowage night 11 and a second stowage night 11 ' supplied by means of, for example, transport air.

The first fiber variety 12 For example, it may be a multicomponent fiber, especially bicomponent fiber, and the second fiber type 13 Fibers of cellulose acetate, cellulose or carbon fibers. Various fiber materials, which have a finite length, can be provided.

Regarding the different fiber materials is fully on DE 102 17 410 A1 the patent applicant referred. The length of the fibers may preferably be smaller than the length of the filter rod to be produced. Accordingly, this may be between 0.1 mm and 60 mm and in particular preferably between 0.2 mm and 10 mm. For man-made fibers, the fiber thickness should be 1 to 20 dtex, preferably 2 to 6 dtex. The average fiber diameter may be in the range of preferably 10 to 40 .mu.m, in particular 20 to 38 .mu.m and in particular preferably between 30 and 35 microns. The fibers are preferably crimped, in particular zigzag-shaped and have 10 sheets per 10 mm.

By means of the feed rollers 16 and 16 ' become the fibers 12 respectively. 13 from the accumulated area of the fibers of the storage bays 11 and 11 ' removed and with a racket roller 17 respectively. 17 ' knocked out and into the first fiber feed chute 19 or the second Faserzuführschacht 19 ' transferred. In a merge area 20 become the different fiber types 12 respectively. 13 to a fiber mixture 32 merged. The fiber mixture 32 enters a conveyor shaft 21 and may be just before the feed roller 22 damming a carding device or a part of a carding device. The dosage of fiber types 12 and 13 happens by, for example, controlling the removal rates of the fibers by means of the feed rollers 16 . 16 ' and / or bat roller 17 . 17 ' , The feed rollers 16 . 16 ' can be made slowly running, such that they promote the fibers against a spring-loaded trough, which is not shown. In this case, the fibers are drawn in and compacted into a thin compact fiber cake, which is not shown.

The between feed rollers 16 . 16 ' and trough downwardly conveyed fiber cake is then at the bottom of the trough of each of a fast-running bat roller 17 . 17 ' milled or knocked out. The fibers are loosened, isolated and into the shafts 19 . 19 ' entered. In this case, a supporting air flow can be used, which in 1 but not shown. At the end of the conveyor shaft 21 becomes the fiber mixture of the feed roller 22 captured and against the hollow 23 and then a leaf spring battery 24 promoted. The hollow 23 is spring loaded. The result is a thin, compact fiber cake, which is not shown, and between the feed roller 22 , the hollow 23 and the leaf spring battery 24 promoted and condensed.

Leaves the fiber cake the effective range of the leaf spring battery 24 , he is from the high-speed roller 25 recorded and adopted. The rollers 25 . 26 and 27 are designed like a card or equipped with sawtooth or Trapezzahngarnituren. The rolling speeds are from roll 25 to roll 27 going up.

After the fibers of the fiber mixture 32 for a rotation of about 180 ° in the clothing of the roller 25 are held, the fibers become 32 tangential to the counter-rotating roller 26 to hand over. Because the roller 26 Turns faster than the roller 25 and in particular has a finer card structure or a finer Sägezahn- or Trapezzahngarnitur, there is a longitudinal alignment, parallelization and separation of the fibers in the transfer.

After the fibers 32 in the clothing of the roller 26 The fibers are held at about 180 ° on the circumference 32 tangential to the turn in opposite directions rotating roller 27 to hand over. Because the roller 27 Turns faster than the roller 26 and in particular has a finer card-like structure or a finer Sägezahn- or Trapezzahngarnitur, is again a longitudinal alignment, parallelization and separation of the fibers in the transfer. After the fibers 32 in the clothing of the roller 27 held at 180 °, become the fibers 32 tangentially upwards in a stream of air 44 a channel or a suction shaft 28 to hand over. Subsequently, the fiber mixture passes 32 on a suction belt 29 a Saugstrangförderers 30 ,

To the Saugstrangförderer 30 joins what's in 1 not shown, a conventional strand forming device, such as according to 10 of the EP 1 464 241 A1 , In this respect, the full extent to the disclosure of this European Referenced patent application. After creating a fiber cake on the suction belt 29 the Saugstrangförderers 30 the formed as fiber strand fiber cake is fed to a formatting device to produce from the fibers forming, from the formed fiber cake or nonwoven fabric a fiber strand with desired cross-sectional geometry and, if necessary, to be wrapped with a wrapping material to be cut to filter rods then.

Instead of an immediate linting of the fibers 32 in the suction shaft 28 First, a drop on a scoop and a subsequent suction in a suction shaft according to the EP 1 584 248 A1 happen, in which case in the carding preferably a roller more or less use a roller.

At the in 1 shown apparatus for the production of filter strands is a fan 31 immediately after the merge area 20 intended. The ventilator 31 generates a transport air flow 42 in the conveyor shaft 21 , Measures may be provided to ensure a closed circuit of the transport air flow, for example, in the lower part of the conveyor shaft 21 Transport air openings are provided which ensure that transport air from the conveyor shaft 21 is discharged without carrying fibers, and then fed back to the fan.

In 1 is also a drive belt 36 provided, for example, a drive of the roller 25 suggests. The rollers 25 to 27 and also the other rollers used, however, can also be driven by a motor with a direct drive.

Furthermore, in 1 the supply of granules 43 to the fiber mixture 32 by means of a Granulatzuführeinrichtung 50 , This happens shortly before the filter material shudders on a suction belt of a suction belt conveyor 30 in the suction shaft 28 ,

For this purpose, from a granular container 33 the Granulatzuführeinrichtung 50 granules 43 with a metering roller 34 dosed fed to a chute, which in a chamber with an accelerator roller 35 ends, the granules tangential in the direction of Saugstrangförderers 30 in the suction shaft 28 flings. This results in a good mixing of the granules with the fibers. It then forms a fiber fleece 41 or filter material fleece 41 on a suction belt of the Saugstrangförderers 30 ,

In the 2 to 4 are schematic sectional views of various embodiments of Granulatzuführeinrichtung 50 provided, which is part of a filter rod machine for the production of filter strands. For example, in EP 1 464 241 A1 a filter rod machine described, with individual elements or devices, such. B. a strand unit, a filter material processing unit, a separating device, a fiber mill, a fluidized bed conveyor and a Saugstrangförderer, wherein the fluidized bed conveyor and the Saugstrangförderer can also be assigned to the Strangeinheit, from 20 said European patent application of the associated description of the figures are known. Corresponding variants are in the 17 . 18 and 19 shown. In addition, details of this device in the 21 and 22 as well as the associated description from EP 1 464 241 A1.

The Granulatzuführeinrichtung 50 has several separate supply lines, the Granulatzuführeinrichtung 50 In particular, a separate supply line for a granulate A or the grade A, a supply line for a granule B or the granule B and a supply line for the granules A / B has. The provision lines are according to the invention functionally separated from each other.

The Granulatzuführeinrichtung 50 has a supply magazine 51.A for the granule type A, a supply magazine 51.B for the granulate B and a storage magazine for 51.C for the granulate mixture A / B. In the storage magazine 51.C For example, the granule mixture A / B is supplied from a segregation device or from a sighting device. The not absorbed by the filter material strand or fiber cake and abgegeförderten filter materials, ie by the Saugstrangförderer 30 pass through, for example by the suction belt 29 and / or on the suction belt 29 past, are first collected and fed to a separation device or a separation device to separate granular components from the separated from the filter material strand filter materials. The collection can also be done by the segregation device or separator. Accordingly, the collecting device may be a separate device or the demixing or separating device.

Characterized in that the filter material strand or the Saugstrangförderer a consisting of a granular mixture (second) filter material is supplied to the demixing or separating device from the collected filter materials that are not kept in the filter material strand, a corresponding granule mixture separated.

The separated granule mixture according to the invention the third delivery line or Granulatzuführeinrichtung 50 fed to the granules A / B, wherein the granules A / B via a return line from the segregation device or sifting device using pneumatic conveying air to the storage magazine 51.C as granules A / B is conveyed.

On the output side of the storage magazines 51.A . 51.B and 51.C Flaps, closures or the like are provided in the lower area to the granules A, B and the granular mixture A / B in the hopper 53.A . 53.B such as 53.C leave. At the bottom of the hopper 53.A . 53.B such as 53.C On the output side of the filling shafts are metering rollers 55.A . 55.B . 55.C arranged to get out of the hopper 55.A . 55.B . 55.C the granules A, B and the granulate mixture A / B metered to a below the metering rollers 55.A . 55.B . 55.C arranged conveyor belt 56 leave.

At the in 2 illustrated embodiment are under the rotation of the metering rollers 55.B . 55.C the granules B and the granular mixture A / B from the filling shafts 53.B and 53.C on the conveyor belt 56 delivered while the granules A while rotating the metering roller 55.A directly into a chute 57 is given while on the conveyor belt 56 metered dispensed granules B and the metered dispensed amount of granules A / B means of the conveyor belt 56 to the chute 57 be transported, so that within the chute 57 a collection area is formed, in which the granules A, the granules B and the granules A / B are collected or mixed.

On the output side of the chute 57 is the accelerator roller 35 arranged to the in the chute 57 collected granule mixture of the granules A, the granules B and the granules A / B in the direction of a Saugstrangförderers (see. 1 , Reference number 30 ) in the suction shaft (reference numeral 28 . 1 ) to hurl.

Typically, the exit of the accelerator roll occurs 35 introduced granules or the introduced granule mixture as a second filter material in the suction shaft in a range of 30 mm to 50 mm below a suction belt of a Saugstrangförderers. Within the scope of the invention, an accelerator brush or an accelerator nozzle may also be provided instead of the accelerator roller.

In addition, the chute has 57 through small openings, for example when using an accelerator brush as an accelerator element for the granules mixture provided air in the upper part of the hoistway 57 to draw, for example, to avoid streaks in the filter strand.

In the 3 Granulatzuführeinrichtung shown 50 is different from the one in 2 illustrated embodiment in that a larger or longer conveyor belt 56 is used, so that initially granules A, granules B and the granules A / B mixture by means of the metering roller 55.A . 55.B and 55.C on the conveyor belt arranged underneath 56 be given and collected in a collection area and optionally mixed, and then the conveyor belt 56 the granules A, B and the granular mixture A / B to the chute 57 promotes and gives in to this.

At the in 4 illustrated embodiment of Granulatzuführeinrichtung 50 are at the filling shafts 55.A . 55.B . 55.C in predetermined filling levels for each hopper 53.A . 53.B . 53.C level sensors 54.A . 54'.A and 54 '.' A and 54.B . 54'.B and 54 '.' B and 54.C . 54'.C and 54 '.' C arranged.

For example, by means of the level sensors 54.A . 54'.A and 54''A the level of the granules A in the hopper 53.A monitors, with the level sensors 54.A . 54'.A and 54''A with a control device 59 are connected in dependence of the detected fill levels, the supply of the granules A from the storage magazine 51.A in the chute 53.A to regulate.

Also the other level sensors 54.B . 54'.B and 54''B at the chute 53.B and the level sensors 54.C . 54'.C and 54''C can also use the control device 59 be connected to the supply of the granules B and the granular mixture A / B in the corresponding chutes 53.B respectively. 53.C to regulate. Furthermore, by means of the control device 59 the dosage or the delivery of the granules are regulated.

On the output side of the filling shafts 53.A . 53.B and 53.C are agitators 61.A . 61.B . 61.C provided by the rotation of the agitators 61.A . 61.B . 61.C possibly resulting bridges of the granules A, B and the granular mixture A / B are destroyed, so that under rotation of the metering rollers arranged underneath 55.A . 55.B . 55.C the granules A, B and the granular mixture A / B from the chutes 53.A . 53.B . 53.C are removed, wherein the withdrawn amounts of granules A, B and the granular mixture A / B in a collecting funnel 66 fall. From the collection funnel 66 the mixture of the granules A and B and the granules A / B enters a channel 67 which may be formed as a fiber channel in another embodiment of a filter rod machine. Alternative to the agitators 61.A . 61.B and 61.C Pneumatic valves can be used to avoid bridging.

About the metering rollers 55.A . 55.B The granules A and B are the collection funnel 66 metered fed. The separated granulate mixture, the storage magazine 51.C is supplied via the metering roller 55.C into the collection funnel 66 given. The granules A, B and the granular mixture A / B come together in the collecting funnel 66 and mingle there when merging. The granulate quantities and the mixing proportions of the individual granules A and B are determined by the rotational speeds of the metering rollers 55.A . 55.B certainly. In this case, the individual amounts of granules A and B are respectively added to the basic amount of recycled granules A / B.

All mentioned features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as essential to the invention. Embodiments of the invention may be accomplished by individual features or a combination of several features.

LIST OF REFERENCE NUMBERS

10

Fiber processing device

11, 11 '

accumulating shaft

12

first type of fiber

13

second type of fiber

14

first feed tube

15

second feed tube

16, 16 '

feed roller

17, 17 '

Beater roller

19

first fiber feed shaft

19 '

second fiber feed shaft

20

Merging area

21

production well

22

feed roller

23

trough

24

Leaf spring battery

25

roller

26

roller

27

roller

28, 28 '

suction well

29, 29 '

suction belt

30

suction rod

31

fan

32

fiber mixture

33

granule units

34

metering

35

accelerator roller

36

drive belts

41

non-woven fabric

43

granules

44

conveying direction

50

Granulatzuführeinrichtung

51.A, 51.B, 51.C

supply magazine

53.A, 53.B, 53.C

hopper

54.A, 54'A, 54''A

level sensor

54.B, 54'B, 54''B

level sensor

54.C, 54'C, 54''C

level sensor

55.A, 55.B, 55.C

metering

56

conveyor belt

57

production well

59

control device

61.A, 61.B, 61.C

agitator

66

hoppers

67

channel

A

Granules A

B

Granules B

FROM

Granulate mixture A / B

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1464241 A1 [0002, 0003, 0043, 0049]
• EP 1464240 A1 [0004]
• DE 102006018102 A1 [0007]
• DE 102006028382 A1 [0008]
• DE 10217410 A1 [0037]
• EP 1584248 A1 [0044]

Claims (12)

A method of producing a filter rod of the tobacco processing industry using a filter rod machine comprising the steps of: feeding a first filter material and a second granular filter material, the granules being provided by a granule feeder, to a suction belt conveyor; the Saugstrangförderer, so that a filter material strand is formed, which is collected by the Saugstrangförderer filter material is collected, - wherein the granular filter material is separated from the collected filter materials and recycled as separated granules to Granulatzuführeinrichtung, characterized in that in a first metering device ( 53.A . 55.A ) and in a second metering device ( 53.B . 55.B ) the Granulatzuführeinrichtung ( 50 ) Granulate (A; B) is provided for the second granular filter material and that the separated granules comprising a granulate mixture (A / B), to a third metering device ( 53.C . 55.C ) the Granulatzuführeinrichtung ( 50 ) and the granule mixture ( 50 ) in the third metering device ( 53.C . 55.C ) is provided for the second granular filter material. A method according to claim 1, characterized in that the suction strand conveyor as a second filter material from the third metering device ( 53.C . 55.C ) consisting of a granular mixture (A / B) separated granules and / or two granules (A; B) respectively from the first and the second metering device ( 53.A . 55.A ; 53.B . 55.B ). Method according to claim 1 or 2, characterized in that from the third metering device ( 53.C . 55.C ) for the granulated mixture (A / B) existing separated granules the suction belt conveyor a predetermined amount of granules mixture ( 53.C . 55.C ) is supplied. Method according to one of claims 1 to 3, characterized in that the of the first and second metering device ( 53.A . 55.A ; 53.B . 55.B ) the Granulatzuführeinrichtung ( 50 ) dispensed granules (A / B) and / or that of the third metering device ( 53.C . 55.C ) the Granulatzuführeinrichtung ( 50 ) discharged granule mixture (A / B) is combined in a collecting area and that the filter material provided in the collecting area is fed to the suction belt conveyor. Method according to one of claims 1 to 4, characterized in that the level of the granules (A, B) or the granule mixture (A / B) in the metering devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ) is recorded in each case. Method according to one of claims 1 to 5, characterized in that a control device and / or control device for the metering devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ) is provided for the granules (A; B) and the granule mixture (A / B), wherein in particular using the control device and / or using the control device, the granules (A; B) and the granule mixture (A / B) in one predetermined ratio can be provided for the second filter material. Filter strand machine of the tobacco processing industry for producing a filter strand of the tobacco processing industry with a first Filtermaterialzuführeinrichtung for supplying a first filter material and a second, designed as Granulatzuführeinrichtung Filtermaterialzuführeinrichtung for feeding a second granular filter material to a Saugstrangförderer, and with a Saugstrangförderer so that a filter material strand from the first and second filter material supplied to the suction belt conveyor, a collecting device for passing through the Saugstrangförderer filter material and with a separating device for separating the granules of the filter materials from the collecting device and with a return device for returning the separated granules to Granulatzuführeinrichtung, characterized that the granule feed device ( 50 ) several separate metering devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ), so that from a first and second metering device ( 53.A . 55.A ; 53.B . 55.B ) granules (A; B) and from a third metering device ( 53.C . 55.C ) the separated granules having a granular mixture (A / B), the suction belt conveyor can be fed. Filter rod machine according to claim 7, characterized in that the return means for returning the separated granules with the third metering device ( 53.C . 55.C ) the Granulatzuführeinrichtung ( 50 ) connected is. Filter rod machine according to claim 7 or 8, characterized in that a collecting area is provided, so that the of the respective metering devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ) the Granulatzuführeinrichtung ( 50 ) granules (A; B) and / or granules mixture (A / B) is brought together in the collecting area and that the filter material provided in the collecting area can be fed to the suction strand conveyor. Filter rod machine according to one of claims 7 to 9, characterized in that the metering devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ) the Granulatzuführeinrichtung ( 50 ) at least one or more level sensors ( 54.A . 54'.A . 54 ''. A ; 54.B . 54'.B . 54 ''. B ; 54.C . 54'.C . 54 ''. C ) exhibit. Filter rod machine according to one of claims 7 to 10, characterized in that the Granulatzuführeinrichtung ( 50 ) a granule accelerating device ( 35 ), which accelerates granules in the direction of the Saugstrangförderers and emits in a suction shaft of the Saugstrangförderers. Filter rod machine according to one of claims 7 to 11, characterized in that a control device and / or a control device for the metering devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ) is provided, wherein in particular the at least one level sensors ( 54.A . 54'.A . 54 ''. A ; 54.B . 54'.B . 54 ''. B ; 54.C . 54'.C . 54 ''. C ) of the dosing devices ( 53.A . 55.A ; 53.B . 55.B ; 53.C . 55.C ) are connected to the control device and / or the control device.

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