EP2702881A1 - Device and method for processing a cladding material strip - Google Patents

Abstract

The method involves providing a wrapping material strip (33). The wrapping material strip is fed in a longitudinal axial conveying direction to an embossing device. The wrapping material strip is embossed in the embossing device. The wrapping material strip is conveyed continuously during the embossing. The wrapping material strip is sprayed with a fluid after embossing of the wrapping material strip. Independent claims are included for the following: (1) an apparatus for processing wrapping material strip; and (2) a filter manufacture machine.

Description

• Bereitstellen des Umhüllungsmaterialstreifens,
• Fördern des Umhüllungsmaterialstreifens in einer längsaxialen Förderrichtung zu einer Prägevorrichtung und
• Prägen des Umhüllungsmaterialstreifens, wobei der Umhüllungsmaterialstreifen beim Prägen kontinuierlich gefördert wird.

The invention relates to a method for processing a wrapping material strip for a rod-shaped article of the tobacco-processing industry with the following method steps:

• Providing the wrapping material strip,
• Conveying the wrapping material strip in a longitudinal axial conveying direction to an embossing device and
• Embossing the wrapping material strip, wherein the wrapping material strip is continuously conveyed during embossing.

Recently, so-called combined performance filters (CP filters) known.

The Chinese patent application CN 258802 Y discloses a groove filter manufacturing machine for making cigarette filter rods with diagonal grooves. Here, a paper feed on another side of a machine frame is doubled and provided as a paper feed a Spezialbobine, on the upper part of an embossing device is mounted. The embossing device has a double roller pair with diagonal groove embossing, a Saugluft- / Papierführungsnut, paper guide rollers and a Papierführungsnut and an infrared switch. It can be produced groove filter rods of different imprints. The double roller pair for embossing is convex-concave.

It is an object of the present invention to provide an efficient method and an efficient device by means of which a reliable and stable embossing in a wrapping material strip for a rod-shaped article of the tobacco processing industry, in particular for filters and / or cigarettes, can be performed.

• Bereitstellen des Umhüllungsmaterialstreifens,
• Fördern des Umhüllungsmaterialstreifens in einer längsaxialen Förderrichtung zu einer Prägevorrichtung und
• Prägen des Umhüllungsmaterialstreifens, wobei der Umhüllungsmaterialstreifen beim Prägen, insbesondere wenigstens zeitweise, kontinuierlich gefördert wird,

wobei nach dem Prägen des Umhüllungsmaterialstreifens der Umhüllungsmaterialstreifen mit einem Fluid besprüht wird.This object is achieved by a method for processing a wrapping material strip for a rod-shaped article of the tobacco processing industry with the following method steps:

• Providing the wrapping material strip,
• Conveying the wrapping material strip in a longitudinal axial conveying direction to an embossing device and
• Embossing of the wrapping material strip, wherein the wrapping material strip during embossing, in particular at least temporarily, continuously conveyed,

wherein, after embossing the wrapping material strip, the wrapping material strip is sprayed with a fluid.

By spraying the wrapping material strip after embossing, in particular immediately after embossing with a fluid, the wrapping material strip can be changed in the still deployed state. In particular, the dimensional stability can be improved, for example, by applying a fluid containing a stabilizing agent or a stabilizing agent. Additionally or alternatively, flavor carriers may be applied or other additives such as fire retardant materials. In addition, the wrapping material strip can be colored by spraying with a fluid to achieve color effects. Finally, glue may also be provided as an alternative to an inner glue track or as an inner glue track in order to connect the embossed wrapping material strip with a further wrapping material strip, for example. A fluid is understood in particular to mean a liquid which is provided with additives such as, for example, flavor carriers and / or color and / or a material which improves the dimensional stability of the embossed wrapping material strip, in particular of the paper.

Surprisingly, it has been found that spraying with a fluid after embossing the wrapping material strip or immediately after embossing the wrapping material strip is a very efficient method step, without the other materials in the merging of the embossed wrapping material strip be adversely affected with a filter material and another wrapping material strip.

Preferably, prior to embossing the wrapping material strip, the wrapping material strip is moistened.

By the step of wetting the wrapping material strip, which is preferably paper consisting of fibers, the fibers arranged in the wrapping material strip become plastically deformable, so that embossing of the wrapping material strip is ensured more securely and a stable embossing is achieved by the possibility of plastic deformation of the fibers. The paper may be conventional cigarette paper or filter rod wrapper paper. However, a crepe paper can also be used.

When moistening, it is preferable to achieve a degree of moisture penetration of the wrapping material strip of 5% to 13%, in particular 7% to 9%. This is the weight percentage.

If the wrapping material strip is heated and / or heated during embossing, a better hardening or hardening of the surface of the wrapping material strip is achieved and thus a more stable embossing. Preferably, the wrapping material strip is heated prior to moistening. Preferably, the wrapping material strip is brought to a temperature of 70 ° C to 120 ° C, in particular 80 ° C to 100 ° C during embossing. In particular, by this measure, a cornification and hardening of the surface during embossing is ensured.

Preferably, the wrapping material strip becomes after spraying dried with a fluid or after embossing in a drying device, so that the wrapping material strip can be processed well and in particular no moisture is released to the strand material to be wrapped.

It is particularly preferred if the method is developed by treating the wrapping material strip with a stabilizing agent, in particular methylcellulose, before and / or after embossing. The stabilizing agent is preferably dissolved in water and is applied to the wrapping material strip with the water for humidification. Preferably, the wrapping material strip is moistened from two sides.

Preferably, the fluid contains or comprises flavor carrier, color and / or glue.

The object is further achieved by a method for producing a strand of the tobacco processing industry, comprising a method according to the invention for processing a wrapping material strip for a rod-shaped article of the tobacco processing industry, wherein a strand material is also delivered to the processed wrapping material strip in an inlet region of a formatting device and the processed wrapping material strip is wound around the strand material during longitudinal conveyance by the formatting device.

Preferably, a further wrapping material strip is arranged around the processed wrapping material strip, wherein, in particular, the further wrapping material strip is glued over the full area on the side of the further wrapping material strip facing the processed wrapping material strip prior to contact with the processed wrapping material strip.

The further wrapping material strip may be the otherwise conventional wrapping material strip which is wrapped around strand material in a formatting device and sealed accordingly to shape and retain the strand material.

The strand material can be tobacco or filter material, for example filter tow. Furthermore, the strand material may be composed of filter segments. To produce such a strand, for example, on the EP 1 427 299 B1 referenced, in which by means of several independent functional units, which are designed as modules and which together form a Filtersegmentzusammenstellmaschine or a part of the Filterherstellmaschine, filter segments are assembled, which are promoted in the compilation queraxial and then transferred with a transfer device in a longitudinal axial conveying movement be transferred to a strand of a stranding machine. In the stranding machine, the strand is then guided in the longitudinal axial conveying direction and enveloped by the wrapping material (s), in order subsequently to cut off corresponding filter rods.

With regard to the processing of FilterTow is on the EP 1 625 799 B1 See, from a filter manufacturing machine of the tobacco processing industry is known, in which a filter rod machine and a filter tow preparation machine are connected to each other to provide the filter manufacturing machine. Here, filter tow is withdrawn from a filter towbale, processed in the filter preparation machine, for example, stretched and sprayed with triacetin, in order then to be transferred to the filter rod machine and there to form a filter strand, which is enveloped, for example, with a wrapping material. At the end, finally, corresponding filter rods from the filter strand.

The object is further achieved by an apparatus for processing a wrapping material strip for a rod-shaped article of the tobacco processing industry, wherein an embossing device is provided, by means of which the wrapping material strip during a longitudinal axial promotion of Umhüllungsmaterialstreifens is embossed or embossed downstream, in particular immediately downstream of the embossing device a spraying device is provided for spraying the wrapping material strip.

Preferably, a moistening device for moistening the wrapping material strip is provided upstream of the embossing device.

Preferably, the moistening device is provided between a wrapping material strip tension control device and the embossing device. This development enables a very precise moistening of the wrapping material strip.

A further or alternative wrapping material strip tension control device preferably comprises a draw roller pair, which is preferably arranged immediately upstream of the conveying direction of the wrapping material strip to the embossing device. In this way, it can be achieved that the wrapping material strip during embossing and in particular downstream of embossing until it enters a formatting device is not or substantially not under tension and is thus substantially or completely stress-free. This will achieve that the embossing applied to the wrapping material is not reduced or eliminated.

The moistening device may provide a spray of a liquid on the wrap strip of material via a single fluid or dual fluid nozzle or via multi-fluid nozzles. Moistening can be done with steam or even superheated steam. In addition, the moistening by means of a mist, in particular water mist, can be carried out by an ultrasonic atomization. In addition, a corresponding mist of the liquid, in particular of water, that is to say a water mist, can be generated by a rotary atomization, whereby the moistening takes place.

Preferably, a heating device is provided. The heating device is preferably arranged in the region of the embossing device and / or integrated in the embossing device and / or arranged upstream of the embossing device. The heating device can be arranged for example in an embossing roll of the embossing device. Further preferably, a heater is provided upstream of the humidifier and / or integrated in the humidifier. Preferably, the moistening device sprays heated water or liquid onto the wrapper strip. Thus, a heating device is provided which heats the liquid to be sprayed onto the wrapping material strip.

It may be provided instead of a heater and a plurality of heating devices. The heater may be a heat radiator or a hot air blower. In addition, the heating device may be a grinding heating device, along which the wrapping material strip to be embossed passes. The heating device can also be integrated in the embossing rollers of the embossing device. For For example, the grinding heater and the heater which provides heating of the embossing rolls may use induction heating. The grinding heater has at least one contact body. In the case of an induction heater, induction coils are preferably arranged adjacent to the contact body and / or the embossing rollers which make the heating contact with the wrapping material strip, in particular in the immediate vicinity of the contact bodies and / or the embossing rollers. The respective contact body (s) and the embossing rolls will then correspondingly comprise an iron-containing material which is heated by induction.

Preferably, a drying device is provided immediately downstream of the spraying device or embossing device, thereby allowing the wrapping material strip to be dried or substantially dried on contact with the strand material.

Particularly preferred is a variant in which the device according to the invention is designed as a slide-in device or process unit of a slide-in device, the slide-in device being mounted or mountable between a filter rod machine and a filter tow preparation machine or a filter segment assembling machine for multi-segment filters, wherein the slide-in device comprises in particular a supply unit which cooperates with the process unit is releasably connectable.

With regard to this preferred embodiment of the device according to the invention, reference is made in particular to the patent application filed on 09.11.2011 with the German Patent and Trademark Office by the applicant with the file reference DE 10 2011 085 981.0 and the title "Filter Making Machine of Tobacco manufacturing industry ".

As a result of this preferred measure, the filter production is more flexible than hitherto possible, since the filter material and / or the wrapping material strip can be processed or processed very variably by the insertion device. By providing one or more slide-in devices, different processing or conditioning processes can also be provided, whereby a different type of processing or processing is made possible by exchanging the respective process unit with another process unit. Thus, it is also possible to change very quickly from the production of one type of filter to another type of filter, as a result of which the filter change can be designed very efficiently. For example, this measure can very quickly provide a different type of embossing on the wrapping material strip. According to the invention, for example, a longitudinal axial embossing is provided. However, other types of embossing could be provided, which are then possible on the corresponding insertion device or the process unit of a slide-in device. Furthermore, another wrapping material can be processed accordingly or the wrapping material can be easily processed or processed with another liquid even at other process temperatures. For this purpose, for example, only the process unit must be replaced, which is then connected to the supply unit.

According to the invention, a filter manufacturing machine of the tobacco processing industry comprises an aforementioned device according to the invention with the corresponding aforementioned features.

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.

Fig. 1

schematisch eine Draufsicht auf eine erfindungsgemäße Filterherstellmaschine mit einer erfindungsgemäßen Vorrichtung zur Bearbeitung eines Umhüllungsmaterialstreifens,

Fig. 2

eine schematische Ansicht einer erfindungsgemäßen Filterherstellmaschine mit einer erfindungsgemäßen Vorrichtung zur Bearbeitung eines Umhüllungsmaterialstreifens in einer anderen Ausgestaltung,

Fig. 3

einen Ausschnitt aus einer Prägevorrichtung in einer schematischen Darstellung,

Fig. 4

einen schematischen Ausschnitt aus einer anderen Ansicht der beiden Prägewalzen aus Fig. 3,

Fig. 5

einen Schnitt durch einen erfindungsgemäß hergestellten Filterstrang in schematischer Darstellung,

Fig. 6

eine schematische Ausschnittdarstellung von zwei miteinander wirkenden Prägewalzen,

Fig. 7

eine schematische Darstellung eines Teils einer erfindungsgemäßen Vorrichtung zur Bearbeitung eines Umhüllungsmaterialstreifens in einer anderen Ausführungsform,

Fig. 8

eine schematische Darstellung eines Ausschnitts einer erfindungsgemäßen Vorrichtung zur Bearbeitung eines Umhüllungsmaterialstreifen in einer weiteren Ausführungsform und

Fig. 9

eine schematische Darstellung einer erfindungsgemäßen Vorrichtung zur Bearbeitung eines Umhüllungsmaterialstreifens im Ausschnitt.

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:

Fig. 1

1 is a schematic plan view of a filter manufacturing machine according to the invention with a device according to the invention for processing a wrapping material strip;

Fig. 2

1 is a schematic view of a filter manufacturing machine according to the invention with a device according to the invention for processing a wrapping material strip in another embodiment,

Fig. 3

a section of an embossing device in a schematic representation,

Fig. 4

a schematic section of another view of the two embossing rollers Fig. 3 .

Fig. 5

a section through a filter strand according to the invention in a schematic representation,

Fig. 6

FIG. 2 a schematic sectional view of two embossing rollers acting together, FIG.

Fig. 7

a schematic representation of a part of a device according to the invention for processing a wrapping material strip in another embodiment,

Fig. 8

a schematic representation of a section of a device according to the invention for processing a wrapping material strip in a further embodiment and

Fig. 9

a schematic representation of a device according to the invention for processing a wrapping material strip in the neck.

In the drawings, the same or similar elements and / or parts are provided with the same reference numerals, so that apart from a new idea each.

Fig. 1 schematically shows a plan view of a filter manufacturing machine according to the invention with a device according to the invention for processing a wrapping material strip. The filter-making machine comprises a filter tow-making machine 20 and a filter-rod machine 40, as described, for example, in US Pat EP 1 625 799 B1 are described. According to the invention, an insertion device 30 is now provided by means of which the wrapping material strip 33 can be processed according to the invention. In Fig. 1 the components for processing the wrapping material strip 33 are indicated only schematically and will be described in more detail below.

In Fig. 1 are in the conveying direction 100, a filter fabric preparation machine 20, the insertion device 30 and then the filter rod machine 40 arranged one behind the other. The arrangement is in this embodiment consecutively aligned or behind one another in a line. In the filter wire processing machine 20, filter tow 11, which is drawn off from a filter towbale 10, is processed, for example stretched, pulled apart and sprayed with triacetin, in order subsequently to be transferred through an inlet funnel 41 of the filter rod machine 40, which is then followed by a formatting device 42. Processing steps, for example on the wrapping material strip 33, can now be carried out by the insertion device 30. In addition, processing steps can also be carried out on the filter tow. However, these further processing steps on the filter tow are not explained in detail.

In the embodiment according to the Fig. 1 Now, for example, a wrapping material strip 33 is embossed by the first embossing roll 34, which is in engagement with the second embossing roll 35. The processed wrapping material strip 33 then passes in the figure according to Fig. 1 below the filter towers 11 and below the inlet funnel 41 into the format device 42. In the format device 42, the filter tow strip 11 is deposited on the wrapping material strip 33. In the formatting device 42, the wrapping material strip is then wound around the filter tow strip 11 and, accordingly, a longitudinal seam is closed by gluing. Alternatively, the wrapping material strip 33 may be wrapped around the filter tow 11, and another wrapping material strip, not shown, wrapped around the processed wrapping material strip 33 and correspondingly provided with adhesive, may be wrapped around the filter tow 11. As a result, can be made by cutting the resulting filter strand corresponding CP filter.

In this exemplary embodiment, the insertion device 30 looks like it is divided into a supply unit 31 and a process unit 32. The supply unit 31 serves to supply electrical energy, for example current and voltage, compressed air, if necessary, water cooling or a heating with a heated one Water and a controller. A control device could also be provided in the process unit, and otherwise the device features which in this case are necessary or desired for embossing.

As an example, which features may be desired in a corresponding process unit will be discussed below Fig. 2 received. However, it should first be pointed out that the insertion device 30 can be detachably connected to the filter strand machine 40 at its respective first side 91 and can be detachably connected to the filter wire preparation machine 20 on its second side 92. In addition, it is possible that a plurality of insertion devices 30 are arranged one behind the other in the conveying direction 100 in order to provide further functionalities for processing wrapping material strips 33 and / or the filter tow. Preferably, only the supply unit 31 can be directly connected to the filter tow preparation machine 20 and the filter rod machine 40. The process unit 32 is then exclusively connectable directly to the supply unit 31. In addition, other processing units 32 could be used with which different types of embossing can be ensured, in such a way that a quick and easy change to the different processing units 32 is possible.

Fig. 2 schematically shows a filter manufacturing machine according to the invention of the tobacco processing industry with a very schematically illustrated filter tow preparation machine 20, an inventive Apparatus for processing a wrapping material strip, for example in the form of the insertion device 30 and a filter rod machine 40, which is also shown very schematically. The processed filter tow 11 from the filter wire processing machine 20 is directed over rollers 61 above the web of wrapping material strip 33 of the wrapping material strip processing apparatus according to the invention and then threaded into an inlet hopper 41 of the filter rod machine.

A wrapping material strip 33 is fed from outside the insertion device or alternatively from a supply in the insertion device 30, which is not shown and may for example be a bobbin or a bobbin changer, via rolls 60 first to a wrapping material strip tensioning device 55, which ensures that the wrapping material strip as constant as possible predetermined tensile force is encouraged, steered. This is followed downstream of the wrapping material strip tensioning device 55 by a moistening device 50 in which the wrapping material strip 33 is moistened, for example with water, which is preferably mixed with a stabilizing agent, for example methyl cellulose. Upstream and / or downstream of the humidifier 50, a heater may be provided to heat the wrap strip of material. The heater can exploit heat radiation, for example, or hot air can be used here. When using methylcellulose as an additive, for example to water, the subsequent embossing is more stable. The moistening is preferably done so that the wrapping material strip 33 has a moisture content of 5 to 13 percent by mass, especially preferably 7 to 9 percent by mass and in particular 8 percent by mass, during embossing. Humidification happens in Fig. 2 one-sided from underneath. Particularly preferred is an embodiment in which the humidification from both sides, ie in addition to the embodiment of Fig. 2 , also happens from above.

The moistened wrapping material strip is then conveyed in the conveying direction 90 via deflecting rollers 60 to an embossing device 36. The embossing device 36 comprises a first embossing roller 34 and an embossing roller 35, which will be explained in more detail below. As a result, preferably a longitudinal axial embossing of the wrapping material strip is achieved, i. an embossing, which shows a waveform in a section transverse to the longitudinal axis of the wrapping material strip.

The moistening device 50 can also be omitted for the success of the invention. However, the provision of the moistening device 50 is preferred.

In Fig. 2 In the embossing device 36, a heating device 56 is integrated, which heats the wrapping material strip, in particular further, by means of heat radiation, for example infrared radiation. It can also be a heater in one or both embossing rollers 34, 35 may be provided.

At least one embossing roll, in Fig. 2 the first embossing roll 34 is provided with a pivoting device 64 which, in the case of a winder, enables the swaging of an embossing roll from the other embossing roll. Preferably, two pivoting devices, ie for each embossing roller a pivoting device 64, are provided. The embossing rollers 34 and 35 may also be arranged linearly displaceable. Downstream of the embossing device 36, a spraying device 95 is now provided, in which the embossed wrapping material strip is sprayed with a fluid. For example, can by spraying with water, in which a stabilizing agent, in particular methyl cellulose, is introduced, provide for a very stable embossing. Alternatively or additionally, paint may also be applied to embossed wrapping material strip 33 and / or flavor carriers such as a menthol flavor or other additives. In addition, it is possible to apply glue here, for example, to provide an internal glue trace in the filter production and / or glue to connect the embossed wrapping material strip with another wrapping material strip. The inner glue track serves, for example, for bonding the wrapping material strip 33 with a filter rod material 11.

The spraying can be done from one side, for example from above or below the embossed wrapping material strip 33, or from both sides. Two or more different spraying devices may also be arranged downstream of each other to spray different fluids onto the wrapper strip. In a spraying device also different fluids can be sprayed onto the wrapping material strip, for example from above a liquid in which a flavor carrier is contained and from below a glue trace.

The moistening device 50, which is optional, may be, for example, an ultrasonic atomizer. As a result, a very uniform moistening of the wrapping material strip is achieved.

Immediately following the spraying device 95, a drying device 51 is provided downstream, by means of which the embossed wrapping material strip 33 is dried. This is followed by a downstream guide 63, by means of the particular a lateral guidance of the wrapping material strip is made possible so as to control the lateral position of the wrapping material strip, in particular relative to the lateral position of a further wrapping material strip 52.

The embossed wrapping material strip is then placed on a further wrapping material strip 52 in the stranding machine 40, and then wound in a format device, not shown, around the filter tow strip 11 in the format device.

The wrapping material strip 52 is glued on the adhesive side 53 by means of a gluing device 54. This results in a secure connection of the wrapping material strip 52 with the embossed wrapping material strip 33. The wrapping material strip 52 is correspondingly deflected by means of the deflecting roller 62.

By providing a wrapper strip tension control, which is exemplified in FIG Fig. 2 is referred to as Zugkrafteinstellvorrichtung 65, the wrapping material strip tension of the processed wrapping material strip 33 is set before the format infeed. In this embodiment, a force or spring-loaded emboss roller suspension is provided. Alternatively, a force or torque controlled dancer according to the configuration of the wrapping material strip tensioning control device 55 may be provided. Preferably, a wrapping material strip tension of 1 to 20 N, particularly preferably 2 to 15 N, further preferably 3 to 10 N, is maintained in the region upstream of the embossing device 36. In the area between the format inlet of the strand device 40 and the embossing device 36, the embossed wrapping material strip is tension-free as far as possible by means of the tensile force adjusting device 65 held. Any guides for the wrapping material strip between the embossing device and the format inlet of the strand device 40 should in particular also lead the wrapping strip as free of tension as possible.

Fig. 3 schematically shows in a side view, the first embossing roll 34 and the second embossing roll of the embossing device 36. The wrapping material strip 33 is brought into the effective range of the two embossing rollers 34 and 35.

The embossing roller 34 has intermittently embossing areas 72 to 75. As a result, corresponding areas are stamped on the wrapping material strip 33 and corresponding areas are not embossed. These are each arranged alternately in the conveying direction.

The arrangement of the embossing rollers 34 and 35 is preferably reversed to that in Fig. 3 that is, the embossing roller 34 is then arranged below the embossing roll 35. The embossing roller 34 is thus disposed below the wrapping material strip barrel.

Fig. 4 shows a section of the two embossing rollers 34 and 35 Fig. 3 in a representation from another side, in this case in Fig. 3 from the left looking at the two embossing rollers. Of the first embossing roller 34 of the embossing region 75 is clearly visible and another area 71, which does not contribute to the embossing. In the embossing area 75, the embossing roller is provided with a contour which has alternating elevations and grooves. The elevations have a radius r1 and the grooves have a radius r2. There are a total of five grooves shown and six surveys. In essence, complementary to the shape of the second embossing roll 35, which, however, has a full embossing area, so no intermittent Embossed areas that alternate with other areas 71. Again, corresponding grooves and projections are provided, wherein the elevations have a radius r4 and the grooves have a radius r3. The elevations of the first embossing roller 34 engage in the grooves of the second embossing roller 35 and vice versa engage the inner protrusions of the second embossing roller 35 in the grooves of the first embossing roller 34 a. The outer protrusions of the second embossing roll 35 in this embodiment frame the outer protrusions of the first embossing roll 34. It should be noted that the first embossing roll 34 and the second embossing roll 35 are spaced from each other such that they do not contact each other so as to damage the wrapping material strip to prevent. Depending on the choice of wrapping material strip, this distance will be adjusted accordingly. It should also be noted that the radii used have no common divisors to minimize wear of the embossing rolls.

Fig. 5 schematically shows a section through a manufactured filter strand. Filter material 110 is enclosed by the embossed wrapping material strip 33, which is wrapped around the filter material in abutment, resulting in a butting region 111. Wrapped around it and bonded to the wrapping material strip 33 is a wrapping material strip 52 corresponding to the usual wrapping material strip in a filter strand. Between the splices, ie the contact points of the two wrapping material strips 33 and 52 are provided corresponding longitudinal axial ventilation slots or ventilation areas, resulting in the increased filter effect in filter cigarettes.

Fig. 6 shows a schematic sectional view of two embossing rollers 34 and 35, which are in operative connection with each other. The Embossing roller 34 has schematically illustrated three elevations and two grooves, in a stamping area 75. The elevations and thus the grooves are formed substantially in the vertical direction, as this of the double arrow 76 shows. The flank angle of the elevations and the grooves are thus relatively steep, ie at about 0 °. As a result, the wrapping material strip which is in Fig. 6 not shown, largely trapped between the vertical edges. This eliminates in a conventional roll geometry, which has a quasi-sinusoidal design, a strain rate in the horizontal direction. Thus, embossing is performed in which the wrapping material strip is stretched substantially in the vertical direction and not in the horizontal direction. This avoids bulging wrapping material strips after embossing.

In order to allow the gentlest possible treatment, the elevations or grooves are rounded in cross section, preferably round, for example semicircular, formed.

The counter embossing roller 35 is provided with two elevations and a groove and at the edge of two half-grooves. This embodiment of the Fig. 6 is only schematically represent the roll geometry of the embossing rollers 34 and 35. For a corresponding embossment with, for example, 18 grooves, the rollers 34 and 35 of course continue to extend in the right and left direction of the Fig. 6 so that there then the embossing roller 34, for example, has 18 grooves and 19 surveys. The counter embossing roller 35 then has 18 elevations and 17 grooves and two sub-grooves on the respective edge of the embossing roller 35. The transitions from the elevations to the flanks of the grooves are rounded. The elevations are particularly preferably annular, helical or spirally formed circumferentially. The ratio of the height of the surveys to Width of the elevations is preferably between 3 and 0.5, in particular between 2.5 and 1.0, which allows a shape-retaining further processing and damage-free producing an embossing.

As wrapping material strip is paper, especially crepe paper. As process steps for processing the wrapping material strip to be embossed, the wrapping material is unwound from a reel by means of a paper tension control. It is then moistened the wrapping material to make the wrapping material plastically deformable, in particular flowable. Accordingly, moisture or in this case, for example, water can be sprayed onto the wrapping material strip, for example with a two-fluid nozzle or with a EinStoffdüse and a metering slide. It can also be applied steam or liquid or water are spread with a flat nozzle. It can also liquid or water are applied by means of a sponge. The liquid or water application is preferably metered with a control or regulating system, wherein a pump speed, a pressure control valve or a flow control valve is provided as a possible intervention. Additives to the liquid may be added to or dissolved in the liquid, such as methylcellulose, to hold the wrapper strip of material after embossing. The embossing process itself can be done with heated embossing rollers. Accordingly, it is preferable to suspend the rollers to provide escape in the event of a wrapping material strip winder. For this purpose, a rocker or a sliding guide, for example with disc springs or pneumatic cylinders is suitable.

In addition, a scraper may be provided which is connected to the pressure rollers attacks to scrape off excess liquid or a superfluous additive. In the embodiment in which no moistening device 50 is provided, the scraper which acts on the pressure rollers is unnecessary. In order to achieve a corresponding dimensional stability of the embossed wrapping material strip, it is preferred if, as the invention provides, a spraying device is provided downstream of the embossing device, which then for example sprays a form stability-increasing fluid.

The embossing rollers have a corresponding geometry, for example in the form of a matrix with a male part, which are substantially complementary to one another. These should not completely squeeze the wrapping material strip when embossing, but should keep areas free for stretching. The roll circumferences should not share a common divider to prevent wear patterns.

A corresponding heating or heating of the wrapping material strip can be done inductively. For example, a spool core may be provided in an embossing roller or both embossing rollers, respectively. It can also be provided a thermal radiation. For example, heating rods could be arranged at short intervals in front of the embossing roll and / or in the embossing roll (s). In addition, hot air can be blown onto the embossing rollers and thus the embossing roller can be heated. It can also be provided heating rods in the embossing rollers. In addition, a heated fluid such as water, oil or steam could also be passed into one or both rollers.

When embossing the wrapping material strip, a slight wrapping of the wrapping material strip around one of the embossing rolls should occur be provided. The wrap is preferably between 0 ° and 90 °, in particular preferably between 0 ° and 30 ° and particularly preferably between 0 ° and 5 °.

As a drying device, a hot air duct, a device with an infrared heater, a microwave heater or other conventional paper heating can be used.

When using an intermittent first embossing roller 34, as in the example of 3 and 4 is shown, a cutting position sensor should preferably be provided in order to adapt the cutting position of, for example, a filter rod to be cut from a manufactured filter strand to the embossing pattern. However, it may alternatively be provided to provide a continuous embossing in the longitudinal axial direction. In this case, the first embossing roller 34 is correspondingly not provided with different embossing areas 72 to 75, but has a continuous circumferential embossing area in the radial direction.

The gap size of the inlet finger of the format device of the stranding machine should be slightly larger than usual in the production of filters with at least partially embossed wrapping material strip in order to avoid smoothing out the embossing.

Fig. 7 schematically shows a section of a further embodiment of the device according to the invention for processing a wrapping material strip. The wrapping material strip 33 passes from the bottom left via a deflection roller 60 into a moistening device 50. In this embodiment, the moistening device can be based on an ultrasonic atomization, so that a liquid mist, in particular water mist, is produced in the moistening device 50, through which the wrapping material strip 33 is guided. However, it may also be a spraying with liquid via a single-fluid or two-fluid nozzle or be generated by steam or superheated steam or a water mist by a rotary atomization.

Subsequently, the moistened wrapping material strip passes in the conveying direction 90 to a deflection roller 60, at which downstream of the conveying direction two contact bodies 80 and 80 'connect, by means of which a heating or heating of the wrapping material strip 33 is achieved. The contact bodies 80 and 80 'are heated. In this embodiment, the heating is done via an induction. For this purpose, induction coils 81 and 81 'are provided which, when an alternating field is provided in the contact bodies 80, 80' generate eddy currents which lead to the heating of the contact bodies 80, 80 '.

The contact bodies 80, 80 'can also have a multilayer structure, so that, for example, only a surface layer on which the wrapping material strip 33 makes contact with the respective contact body is heated. In this case, then not the entire contact body 80, 80 ', for example, from a ferrous material, but only the surface layer or a thin layer, which is arranged on the surface. It takes place here a corresponding heating, which is for example between 70 ° C and 120 ° C, in particular 80 ° C to 100 ° C, is.

Alternatively, the heating of the wrapping material strip by the contact bodies may be somewhat lower in temperature, for example, as well as in FIG Fig. 7 is shown, the embossing rollers 34 and 35 are also heated accordingly. Again, an induction heater can be used. For this purpose, adjacent to the respective embossing roller 34 or 35 induction coils 82 "and 82 '" arranged, which can also generate an induction current in the embossing rollers or in a surface layer of the embossing rollers, which leads to a heating of the embossing rollers or a surface layer of the embossing rollers. Also in this case, either the respective embossing roller 34 or 35 or the surface layer is then made of a preferably iron-containing material.

In the embossing region, the temperature of the wrapping material strip should then be in the range from 70 ° C. to 120 ° C., in particular preferably from 80 ° C. to 100 ° C. By using an induction heater, the energy can be selectively introduced into the part to be heated, whereby a very efficient use of energy is possible. In order to make the energy use even more efficient, the body to be heated (for example, the contact body 80, 80 'or the embossing rollers 34, 35) can be heated according to the surface only in one layer. The layer thickness is found for the skilled person depending on the application requirements and is in particular between 0.5 mm and 5 mm. This layer can then be iron-containing, for example, whereas the remainder of the contact body 80, 80 'or the embossing roller 34, 35 can have a different material, such as aluminum.

After embossing, the wrapping material strip 33 is conveyed in the direction of a format inlet of an extrusion machine in the conveying direction 90 through a spraying device 95. Between the embossing device 36 and the format inlet, which in Fig. 7 is not shown, the wrapping material strip should be performed as free of tension. To ensure this, for example, an embodiment according to Fig. 8 Use find in which a Zugwalzenpaar 87, comprising a guide roller 88 and a pressure roller 89, is provided. The pressure roller 89 may, for example, have an elastic sheath such as rubber and pushes against the pulley 88. The pulley 88 is driven accordingly to pull the wrap strip of material from upstream.

Subsequently, the wrapping material strip passes around a deflection roller 60, there already relatively tension-free, and then subsequently in the embossing device 36, comprising the embossing rollers 34 and 35, the here in Fig. 8 are indicated by dashed lines, to be embossed and then fed tension free from there to the format device. In order to provide a de-stressing, a little more wrapping material should be conveyed from the draw roller pair 87 to the embossing device than is conveyed away by the stranding machine which adjoins. As a result, a low voltage can be achieved up to a voltage free shortly before the format inlet. If a correspondingly high tensile stress prevails in this area, otherwise at least the outer area of the wrapping material strip would be re-embossed.

Fig. 8 also shows that the pressure roller 89 is pressed by a lever and a pivot axis to the guide roller 88.

In addition shows Fig. 8 a particular embodiment of a heating device, which is arranged upstream of the embossing device 36. There are also similar here as in Fig. 7 two contact bodies 80, 80 'shown schematically, wherein the wrapping material strips 33 are shown in phantom in this area, namely in the contact region of the contact body 80, 80' to the wrapping material strip 33, since this is a schematic view and guide surfaces and also partially also safety bar 84 and 84 'obscure the wrapping material strip. The guide surfaces or guide walls serve to ensure a uniform To provide wrapping material strip guide. The safety brackets 84, 84 'serve to prevent the operator from touching the contact bodies 80, 80', which are correspondingly hot.

In addition, the wrapping material strip guide here has another special feature. There are further deflection rollers provided, namely deflection rollers 60 '. These are attached to a pivot arm 83 which is pivotable about a pivot axis 86. In the event of a machine stop, this pivoting arm 83 now pivots in the pivoting direction 85, so that the wrapping material strip 33, which is deflected around the first deflecting roller 60 'in wrapping material strip conveying direction by two deflecting rollers 60 and then by a further deflecting roller 60', moves away from the surfaces the contact body 80, 80 'removed.

This ensures that the wrapping material strip 33 is not damaged in a machine stop due to the heat of the contact body 80, 80 ', in particular not tearing or burning. Thus, in a restart of the machine according to the swivel arm can be swung back again, so that then without re-threading the wrapping material strip, the machine can start again.

The contact body 80, 80 'from Fig. 8 For example, they can also be heated inductively. For this purpose, in the respective rear region of the contact body 80, 80 'may be provided an induction coil, whereas the area to be heated, namely the area which comes into contact with the Umhüllungsmaterialstreifen 33, consists of a material which is inductively effective. A corresponding material should be an electrically conductive material, wherein the conductivity should not be too large. Iron-containing materials are particularly suitable for this purpose. The heating effect arises from the fact that the eddy currents generated by the induction in the conductive material have corresponding losses resulting in the evolution of heat. Alternatively, however, an electric heater may also be incorporated into the contact bodies 80, 80 ', for example.

Fig. 9 schematically shows a section of a device according to the invention for processing a wrapping material strip 33, which is similar to that of Fig. 2 is. In this exemplary embodiment, a moistening device 50 is provided, which is designed, for example, as an ultrasonic atomizer and wets the wrapping material strip 33 from two sides. Downstream of the moistening device 50, a grinding heater in the form of the two contact bodies 80, 80 'is provided, on the curved surface of which the wrapping material strip 33 is guided along with some tension. By the corresponding contact of the wrapping material strip 33 with the warm or hot contact bodies 80 and 80 ', the wrapping material strip 33 is heated efficiently. The contact bodies 80, 80 'can be heated by an induction heater or, for example, by means of a heating resistor, which is mounted in the induction bodies 80, 80' or on which the contact surface is applied to the wrapping material strip opposite side. Downstream then closes after a corresponding deflection roller, the embossing device 36 with the two embossing rollers 34 and 35 at.

Downstream of the embossing device 36, the spraying device 95 is arranged, which in this embodiment sprays the wrapping material strip from two sides, ie from above and from below. This is then immediately followed by a guide 63 and, what is not shown, an inlet funnel of a format device. According to this embodiment Fig. 9 Thus, no drying device is provided. This is in particular then makes sense if sufficient drying, for example by the heated contact body 80, 80 'and preferably additionally the heated embossing device 36 is achieved or also, for example, if a spraying with glue or a fast-drying paint is made.

Above, the invention has been explained with reference to a single-lane strand machine. For example, for a two or more web stranding machine, wider embossing rolls may be used and embossed a wrapping material strip that is two or more times the width of a strand. After embossing, the wrapping material strip may be longitudinally cut into two or more strips and fed to the respective strands. It can also be prefabricated, i. precut, wrapping material to be processed.

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

Filtertowballen

11

filter tow

20

Filtertowaufbereitungsmaschine

21

operating side

22

back

30

insertion device

31

supply unit

32

process unit

33

Wrapping material strip

34

first embossing roll

35

second embossing roll

36

embosser

40

Filter rod machine

41

feed hopper

42

format device

50

humidifying

51

drying device

52

Wrapping material strip

53

adhesive side

54

gluing device

55

Umhüllungsmaterialstreifenzugregelungsvorrichtung

56

heater

60, 60 '

idler pulley

61

idler pulley

62

idler pulley

63

guide

64

swivel device

65

tension adjuster

71

another area

72

stamping area

73

stamping area

74

stamping area

75

stamping area

76

double arrow

80, 80 '

Contact body

81, 81 '

induction coil

82, 82 ', 82 "

induction coil

83

swivel arm

84, 84 '

safety bar

85

pan direction

86

swivel axis

87

pair of drawing rollers

88

idler pulley

89

platen

90

longitudinal axial conveying direction

91

first page

92

second page

95

Besprühvorrichtung

100

conveying direction

110

filter material

111

joint area

r1, r2, r3, r4

radius

Claims (15)

A method of processing a wrapping material strip (33) for a rod-shaped article of the tobacco processing industry, comprising the following steps: Providing the wrapping material strip (33), - conveying the wrapping material strip (33) in a longitudinal axial conveying direction (90) to an embossing device (36) and Embossing the wrapping material strip (33), wherein the wrapping material strip (33) is conveyed continuously during embossing,
characterized in that after embossing the wrapping material strip (33), the wrapping material strip (33) is sprayed with a fluid. A method according to claim 1, characterized in that the wrapping material strip (33) is moistened before embossing, in particular when moistening a Durchfeuchtungsgrad the wrapping material strip (33) of 5% to 13%, in particular 7% to 9%, is achieved. A method according to claim 1 or 2, characterized in that the embossing of the wrapping strip (33) is heated and / or is. A method according to claim 3, characterized in that the wrapping material strip (33) is brought to a temperature of 70 ° C to 120 ° C, in particular 80 ° C to 100 ° C, the embossing. Method according to one of claims 1 to 4, characterized in that after spraying with a fluid or after embossing the wrapping material strips (33) in a drying device (51) is dried. Method according to one of claims 1 to 5, characterized in that before and / or after the embossing of the wrapping material strip (33) with a stabilizing agent, in particular methylcellulose, is treated. Method according to one of claims 1 to 6, characterized in that the fluid is or comprises flavor carrier, color and / or glue. A method for producing a strand of the tobacco processing industry, comprising a method according to any one of claims 1 to 7, further comprising dispensing a strand material (11) in an entry region of a formatting device (42) onto the processed wrapping material strip (33) and the processed wrapping material strip (33). 33) is wound around the strand material (11) during the longitudinal axial conveying (100) by the formatting device (42), wherein a further wrapping material strip (52) is arranged, in particular the further wrapping material strip (52), around the processed wrapping material strip (33) a contact with the processed wrapping material strip (33) over the entire surface of the machined wrapping material strip (33) facing side (53) of the further wrapping material strip (52) is glued. An apparatus for processing a wrapping material strip (33) for a rod-shaped article of the tobacco processing industry, wherein an embossing device (36) is provided by means of which the wrapping material strip (33) is embossable or embossed during a longitudinal axial conveyance (90) of the wrapping material strip (33) , characterized in that downstream of the embossing device (36) is provided a spraying device for spraying the wrapping material strip (33). Apparatus according to claim 9, characterized in that upstream of the embossing device (36) is provided a moistening device (50) for moistening the wrapping material strip (33). Apparatus according to claim 9 or 10, characterized in that the moistening device (50) is provided between a wrapping material strip tensioning device (55) and the embossing device (36). Device according to one of claims 9 to 11, characterized in that a heating device (56) is provided, wherein in particular the heating device (56) in the region of the embossing device (36) is arranged and / or integrated in the embossing device (36) and / / or upstream of the embossing device (36) is arranged. Device according to one of claims 9 to 12, characterized in that a drying device (51) is provided immediately downstream of the spraying device or the embossing device (36). Device according to one of claims 9 to 13, characterized in that the device as a slide-in device (30) or process unit (32) of a slide-in device (30) is formed, wherein the insertion device (30) between a filter rod machine (40) and a filter tow preparation machine (20 ) or a filter segment assembly machine for multi-segment filters is mounted or mountable, wherein the insertion device (30) in particular comprises a supply unit (31) which is releasably connectable to the process unit (32). Filter manufacturing machine of the tobacco processing industry with a device according to one of claims 9 to 14.

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