Device and method for producing a filter rod, use of a filter rod and hnb product

Abstract

Device 2 and method for producing a filter strand 4 for the tobacco processing industry, comprising: a strand forming device 6 with a conveying element 10 on which a wrapping material strip 12 is arranged, onto which filter material 18 can be applied. The filter material 18 is conveyed together with the wrapping material strip 12 in a material flow direction M through a forming channel 20 to form a filter strand 4 surrounded by the wrapping material strip 12. A gluing device 8 applies a bead of glue 22, wherein the wrapping material strip 12 has two longitudinal edges 26a, 26b opposite each other with respect to its longitudinal direction, to which a longitudinal edge area 28a, 28b is attached, wherein the gluing device 8 is configured to apply the bead of glue 22 at least in an overlap area 24 of the longitudinal edge areas 28a, 28b in order to form a seam bond.The strand forming device 6 is designed and configured to form an overlap area 24, the width B of which is measured between the longitudinal edges 26a, 26b, and / or the gluing device 8 is designed and configured to apply a glue bead 22 with a glue bead width LB, wherein the width B of the overlap area 24 and / or the glue bead width LB, measured along a circumference of the filter strand 4 wrapped with the wrapping material strip 12, is greater than 3 mm.

Description

[0001] The invention relates to a device for producing a filter rod in the tobacco processing industry, comprising: a rod forming device with a conveyor element on which a wrapping material strip is arranged, to which filter material can be applied, wherein the conveyor element is designed to convey the filter material together with the wrapping material strip in a material flow direction to form a filter rod from the filter material surrounded by the wrapping material strip through a format channel of the rod forming device, a gluing device for applying a line of glue, wherein the wrapping material strip has two longitudinal edges opposite one another with respect to its longitudinal direction, to each of which a longitudinal edge region of the wrapping material strip adjoins, wherein the gluing device is designed toTo create a seam bond, apply the glue line in an overlapping area of ​​the longitudinal edges.

[0002] Furthermore, the invention relates to a method for producing a filter rod for the tobacco processing industry, comprising the following steps: forming a filter rod surrounded by the wrapping material strip from a filter material by conveying it through a format channel of a rod forming device, wherein the rod forming device has a conveying element on which a wrapping material strip is arranged, to which the filter material is applied, wherein the conveying element conveys the filter material together with the wrapping material strip in a material flow direction through the format channel, applying a line of glue with a gluing device, wherein the wrapping material strip has two longitudinal edges opposite one another with respect to its longitudinal direction, to which a longitudinal edge region of the wrapping material strip is each adjoined,wherein the gluing device applies the glue line in an overlapping area of ​​the longitudinal edge areas to form a seam bond.

[0003] The invention also relates to the use of such a filter strand and an HNB product.

[0004] To produce filter rods, the tobacco processing industry uses a filter material made from a mixture of various ingredients. A filter tow, which consists primarily of cellulose acetate and is used as the starting material, is treated with a plasticizer, such as triacetin, before the filter tow is further processed into a filter rod. The plasticizer dissolves the cellulose acetate fibers, causing them to bond together in a format unit under the influence of pressure and heat, solidifying the filter material and forming the filter rod. The filter rod is wrapped in a strip of wrapping material, such as a strip of paper, and then cut to the desired length. The filter plugs or filter segments produced in this way can, for example, be attached to tobacco rods and further processed into ready-to-use cigarettes.

[0005] Multi-part filters, so-called multi-segment filters, which are assembled from individual segments, are also known. By combining several filter segments, the product properties of the manufactured filter can be influenced. The individual filter segments are assembled, for example, on a drum and then surrounded by a strip of wrapping material. Such a multi-segment filter can be further processed into a ready-to-use cigarette in the same way as a filter plug made from only one segment, for example, by attaching it to a tobacco rod.

[0006] Individual filter segments can also be combined with other rod-shaped segments, for example with cooling sections, aroma-influencing segments, tobacco-containing segments or even with non-tobacco-containing segments, to produce alternative smoking products, which are also referred to as HNB products (HNB: Heat-not-Burn) or THP (Tobacco Heated Product).

[0007] In the context of this description, "filter material" refers to the intermediate product that is subsequently further processed into a ready-to-use filter by wrapping it with a wrapping material strip. The filter material can be, for example, a filter tow made of cellulose acetate, from which a filter segment or filter is produced, or one or more filter segments that are further processed into a multi-segment filter.

[0008] In conventional filter machines, the wrapping material strip is secured along a longitudinal seam extending in the longitudinal direction of the filter strand or in the direction of the material flow (the longitudinal direction of the filter strand and the material flow direction often coincide), primarily with hot melt adhesive, thus closing the filter strand. In an overlapping area between the longitudinal edge regions of the wrapping material strip adjoining the longitudinal edges of the wrapping material strip, these are bonded together with hot melt adhesive. The use of hot melt adhesive is widespread because it allows for high production and machine speeds.

[0009] It is an object of the invention to provide a device for producing a filter strand and a method for producing a filter strand, the use of such a filter strand and an HNB product, wherein a high-quality closure of the filter strand is to be achieved.

[0010] The object is achieved by a device for producing a filter rod in the tobacco processing industry, comprising: a rod forming device with a conveyor element on which a wrapping material strip is arranged, to which filter material can be applied, wherein the conveyor element is designed to convey the filter material together with the wrapping material strip in a material flow direction to form a filter rod from the filter material surrounded by the wrapping material strip through a format channel of the rod forming device, a gluing device for applying a line of glue, wherein the wrapping material strip has two longitudinal edges opposite one another with respect to its longitudinal direction, to which a longitudinal edge region of the wrapping material strip is respectively connected, wherein the gluing device is designed toto form a seam bond, to apply the glue line at least in an overlapping area of ​​the longitudinal edge areas, wherein this device is further developed in that the strand forming device is designed and configured to form an overlapping area, the width of which is measured between the longitudinal edges of the wrapping material strip, and / or the gluing device is designed and configured to apply a glue line with a glue line width, wherein the width of the overlapping area and / or the glue line width, measured along a circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction, is / is greater than 3 mm.

[0011] Traditionally, the maximum width of the overlap area of ​​the wrapping material in the seam area, where the wrapping material is applied in two layers and where the filter strand is sealed, is 3 mm, measured between the longitudinal edges of the wrapping material strip. This value has long been established in practice and has become a standard. Along with this, the technical prejudice has become established that a change in the value of the overlap width of 3 mm merely entails technical or economic disadvantages, for example, slowing down production speed or leading to unnecessarily high material consumption.

[0012] Contrary to this technical prejudice, the device according to aspects of the invention provides a filter material strand in which a width of the overlapping region and / or a glue track width is greater than 3 mm.

[0013] The glue line width is the maximum width of the glue line, unless it is applied with a uniform width or is not straight. For example, if a meandering, wavy glue line is applied, the glue line width is the maximum width of this meandering structure, i.e., the maximum distance between the extremes—viewed along the circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction.

[0014] It has been found that increasing the width of the overlap area and / or the glue line width offers advantages, especially for products whose ingredients are more temperature-sensitive than conventional cut tobacco. Among other things, a wider overlap area and / or a larger glue line width enables the use of cold glue, which offers several advantages over the traditionally used hot glue or a combination of hot glue and cold glue. The wider overlap area also offers the possibility of creating a bond with high initial tack when using cold glue, allowing the production of a high-quality filter rod. The increased width of the overlap area also allows the adhesive surface to be enlarged, thus simultaneously increasing the glue line width.An enlarged bonding surface offers the possibility of reducing the energy input per unit area required to dry the glue. This allows for lower temperatures to be used while maintaining the same production speed. This reduces the risk of thermal degradation of the filter strand. This applies to both the filter material and the wrapping material. For example, unwanted roasting of the wrapping material, such as a paper strip, can be avoided. Furthermore, melting of the filter material in the filter strand can be prevented.

[0015] According to an advantageous embodiment, the device is further developed in that the width of the overlapping region and / or the glue track width is / is greater than 3.5 mm, in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm.

[0016] Furthermore, according to a further advantageous embodiment, it is provided that the width of the overlap region and / or the glue track width lies in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm.

[0017] If the width of the overlap area and / or the glue line width is greater than one of the mentioned values ​​or if the width of the overlap area and / or the glue line width is in one of the mentioned intervals, this allows an advantageous realization of the previously mentioned advantages.

[0018] It has further been found that a maximum value of 6 mm for the width of the overlap region and / or the glue line width is also advantageous. According to further embodiments, it is therefore provided that the width of the overlap region and / or the glue line width is / are less than 8 mm, in particular less than 7.5 mm, furthermore in particular less than 7 mm, furthermore in particular less than 6.5 mm, and furthermore in particular less than 6 mm.

[0019] The advantages associated with the use of cold glue have already been partially mentioned. According to one embodiment, the gluing device is configured to process exclusively cold glue as the material for the glue line.

[0020] As mentioned at the beginning, the use of hot melt glue allows for high machine speeds. To improve aging resistance, a cold glue seam can also be applied. Both glue seams are traditionally applied with an overlap of 3 mm. However, for the production of THP or HNB products, or even for the production of paper filters, the use of cold glue is advantageous. It is resistant to aging and heat and also has a lower inherent taste than hot melt glue. Traditionally, the use of cold glue led to the technical dilemma that it required a longer drying time, which inevitably resulted in a reduction in production speed.The accelerated drying of cold glue is also fraught with technical problems, as the sudden heating of the cold glue seam can impair the filter material, for example, by melting it, or cause unwanted roasting of the wrapping material. The application of high temperatures can also lead to the evaporation of flavorings or additives that may be present in the filter material. The enlargement of the width of the overlap area and / or the glue line width to values ​​greater than 3 mm, as provided for in aspects of the invention, makes the use of cold glue possible without having to accept the aforementioned technical problems that arise with conventional solutions. Thus, by widening the overlap area and / or increasing the glue line width, the required high initial adhesive strength can be achieved even when using cold glue.The filter strand's wrapping is reliably sealed, eliminating the risk of the adhesive seam accidentally coming loose and compromising the quality of the strand. Increasing the potential adhesive surface also reduces the energy input per unit area required for drying, minimizing damage to the filter material and increasing production speed.

[0021] According to a further advantageous embodiment, the device is further developed in that the gluing device is configured to apply a cold glue track made of cold glue and a hot glue track made of hot glue, which together form the glue track. A cold glue track width of the cold glue track is greater than a hot glue track width of the hot glue track, wherein the cold glue track width and the hot glue track width are each measured along the circumference of the filter rod wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction. In particular, it is provided that the cold glue track width is greater than the hot glue track width by a factor of 1.5; in particular by a factor of 2; furthermore, in particular by a factor of 2.5; furthermore, in particular by a factor of 3; furthermore, in particular by a factor of 3.5; furthermore, in particular by a factor of 4; furthermore, in particular by a factor of 4.5 and furthermore, in particular by a factor of 5.

[0022] The effect of hot glue and cold glue is advantageously combined. However, unlike traditional devices for producing a filter rod, the hot glue track is very narrow. In other words, very little hot glue can be used, which is only important for achieving the initial adhesive strength. The technical disadvantages otherwise associated with the use of hot glue can be minimized in this way. In this context, the previously mentioned ratios between the width of the hot glue track and the cold glue track have proven particularly suitable.

[0023] According to a further embodiment, the device is further developed in that the gluing device is arranged and configured to apply a single or several, in particular two, traces of glue.

[0024] Applying only a single line of glue allows for a simplified design of the gluing device. Applying two or more lines of glue makes it possible to completely glue a wide seam connection area. Several conventional gluing devices, typically designed for applying very narrow lines of glue, can be combined. Different glue materials can also be applied to the different lines of glue, increasing the variability of the resulting joint.

[0025] If multiple glue lines are applied, the glue line width is measured based on the maximum extension of all glue lines combined. For example, if a first and a second glue line are applied with a first and a second width, the glue line width of such a glue line consisting of the first and second glue lines is the sum of the first and second widths—again, viewed along a circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction.

[0026] According to an advantageous development of the device, it is further provided that the gluing device is designed to apply glue to the overlapping area along its entire width.

[0027] If the entire width of the overlap area is utilized for the glue line, i.e., a glue line is applied across the entire width of the overlap area, the increased width of the seam connection area can be optimally utilized. A particularly stable and therefore reliable connection of the wrapping material strip can be created, which benefits the quality of the produced strand.

[0028] The drying of the glue track can be assisted by the device being developed according to a further embodiment by a cover strip provided with a preheating device, which, viewed along the circumference of the filter strand, is arranged to at least partially cover the overlapping area, and which is designed to carry out a pre-drying of the glue track.

[0029] The preheating device is, for example, an electric heating device, such as a temperature-controlled electric heating device. The temperature of the preheating device, which only partially dries the glue line, can be deliberately chosen to be lower than the temperature of a drying device, which completely dries the glue line. The device thus comprises, for example, a preheating device and a drying device, so that the glue line can be dried in two steps. As a result, the temperatures required for drying can be lowered and the energy input into the strand can be minimized.

[0030] According to a further embodiment, the device is further developed in that the width of the overlapping region is greater than 3 mm and the filter material is an endless filter material free of wrapping material, in particular a filter tow.

[0031] The overlap area is the area where the longitudinal edges of the wrapping material strip overlap, i.e., the area where the wrapping material is present in two layers. Increasing the overlap area allows the adhesive used to close the strand to be distributed over a larger area. Furthermore, the temperatures required for drying the glue joints can be reduced, while simultaneously creating a reliable adhesive joint with the required initial strength.

[0032] According to a further embodiment, the device is further developed in that the glue track width is greater than 3 mm.

[0033] By applying a glue line with a larger width, both a high initial strength and a secure and reliable high-quality closure of the filter strand can be achieved.

[0034] According to further embodiments, it is not necessary for the glue line width and the width of the overlapping area to be identical. The glue line width can be greater than the width of the overlapping area. Such an embodiment is particularly advantageous in combination with a further embodiment of the device, according to which the filter material is an assembly of filter segments each surrounded by a wrapping, wherein the gluing device is arranged and configured to apply the glue line partially to the wrapping of the filter segments and partially to the wrapping material strip.

[0035] The filter segments, surrounded by a wrapping, serve as a counter-bearing for the glue line, allowing a bond to be created between the wrapping material strip and the wrapping of the filter segments. Since the filter segments are surrounded by a wrapping, the application of glue does not negatively affect the properties or quality of the filter material. Advantageously, according to such an embodiment, a device can be provided in which a comparatively small overlap width, even an overlap width of less than 3 mm, can be combined with a larger glue line width, in particular with a glue line whose width is greater than 3 mm.

[0036] According to a further embodiment, the device is further developed by a heating skid arranged downstream of the gluing device for heating and drying the glue track, wherein a width of the heating skid, measured along a circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction, is smaller than the glue track width.

[0037] The narrow heating plate allows a portion of the glue line to dry and cure quickly, increasing the initial adhesive strength. The remaining part of the glue line can dry more slowly, thus advantageously preventing adhesion cracks, such as fiber tears in the paper strip used as wrapping material, which can be caused by the high adhesive strength.

[0038] The object is further achieved by a method for producing a filter rod for the tobacco processing industry, comprising the following steps: Forming a filter strand surrounded by the wrapping material strip from a filter material by conveying it through a format channel of a strand forming device, wherein the strand forming device has a conveying element on which a wrapping material strip is arranged, to which the filter material is applied, wherein the conveying element conveys the filter material together with the wrapping material strip in a material flow direction through the format channel, applying a line of glue with a gluing device, wherein the wrapping material strip has two longitudinal edges opposite one another with respect to its longitudinal direction, to which a longitudinal edge region of the wrapping material strip is each adjoined, wherein the gluing device applies the line of glue at least in an overlapping region of the longitudinal edge regions to form a seam bond, wherein this method is advantageously further developed in thatthat with the strand forming device an overlapping area is formed, the width of which is measured between the longitudinal edges of the wrapping material strip, and / or a glue line with a glue line width is applied, wherein the width of the overlapping area and / or the glue line width, measured along a circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction, is / is greater than 3 mm.

[0039] The same or similar advantages apply to the process as those already mentioned with regard to the device for producing a filter strand, so that repetition will be avoided.

[0040] According to an advantageous embodiment, the method is further developed in that the overlapping region is formed with a width and / or the glue line is applied with a glue line width that is greater than 3.5 mm, in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm.

[0041] According to a further advantageous embodiment, the method is further developed in that the overlap region is formed with a width and / or the glue line is applied with a glue line width that lies in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm.

[0042] According to a further embodiment, the method can be further developed in that the gluing device processes exclusively cold glue as material for the glue track.

[0043] The use of cold glue is particularly advantageous for the production of HNB products or filter segments for such products as well as for filter segments with additional properties, which contain, for example, flavorings.

[0044] According to a further embodiment, the method is further developed in that the gluing device applies a cold glue track made of cold glue and a hot glue track made of hot glue, wherein a cold glue track width of the cold glue track is greater than a hot glue track width of the hot glue track, wherein the cold glue track width and the hot glue track width are each measured along the circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction, and wherein in particular the cold glue track width is greater than the hot glue track width by a factor of 1.5; in particular by a factor of 2; furthermore in particular by a factor of 2.5; furthermore in particular by a factor of 3; furthermore in particular by a factor of 3.5; furthermore in particular by a factor of 4; furthermore in particular by a factor of 4.5 and furthermore in particular by a factor of 5.

[0045] According to a further embodiment, the method is advantageously further developed in that the gluing device applies one or more, in particular two, traces of glue.

[0046] The method is further advantageously developed in that the gluing device glues the overlapping area along its entire width.

[0047] According to a further advantageous embodiment of the method, it is further provided that the glue track is pre-dried with a cover strip which is provided with a preheating device and which, viewed along the circumference of the filter strand, at least partially covers the overlapping area.

[0048] According to a further advantageous development of the method, it is provided that the width of the overlapping area is greater than 3 mm and an endless filter material free of wrapping material is processed as the filter material.

[0049] According to a further advantageous embodiment, it is further provided that the glue track width is greater than 3 mm and the filter material is a combination of filter segments each surrounded by a covering, wherein the gluing device applies the glue track partly to the covering of the filter segments and partly to the wrapping material strip.

[0050] According to a further advantageous embodiment, it is further provided that the glue track is heated and dried with a heating skid arranged downstream of the gluing device, wherein a width of the heating skid, measured along a circumference of the filter strand wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to the material flow direction, is smaller than the glue track width and the glue track is partially cured with the heating skid.

[0051] The object is further achieved by the use of a filter strand produced by such a method according to one or more of the aforementioned embodiments, in particular filter segments cut to length from this filter strand, for the production of HNB products (also referred to as THP: Tobacco Heat Products) of the tobacco processing industry.

[0052] The use of the filter strand produced by such a process also has the same or similar advantages as those already mentioned above with regard to the device for producing the filter strand and the process for producing the filter strand.

[0053] Furthermore, the object is achieved by a product, in particular an HNB product, of the tobacco processing industry, comprising at least one filter segment wrapped by a wrapping material strip, wherein the wrapping material strip has two longitudinal edges opposite one another with respect to its longitudinal direction, to which a longitudinal edge region of the wrapping material strip is respectively connected, wherein in order to form a seam bond, a glue line is applied at least in one

[0054] Overlap area of ​​the longitudinal edge areas is applied. The product is characterized in that the overlap area, the width of which is measured between the longitudinal edges of the wrapping material strip, and / or a glue line width of the glue line is greater than 3 mm, wherein the width of the overlap area and / or the glue line width is measured along a circumference of the filter segment wrapped with the wrapping material strip in a plane transverse, in particular perpendicular, to a longitudinal extension direction of the filter segment.

[0055] The same or similar advantages apply to the HNB product of the tobacco processing industry as those already mentioned above with regard to the device for producing the filter rod or the method for producing the filter rod, so that repetition will be avoided.

[0056] Further features of the invention will become apparent from the description of embodiments of the invention together with the claims and the accompanying drawings. Embodiments of the invention may incorporate individual features or a combination of several features.

[0057] The invention is described below, without limiting the general inventive concept, using exemplary embodiments with reference to the drawings, whereby express reference is made to the drawings for all details of the invention not explained in more detail in the text. They show: Fig. 1 shows a schematically illustrated device for producing a filter strand, Fig. 2 to Fig. 4 show schematically simplified cross-sectional views through the filter strand in such a device, Fig. 5 shows a schematically simplified longitudinal section through a THP or HNB product.

[0058] Within the scope of the invention, features marked with "in particular" or "preferably" are to be understood as optional features.

[0059] In the drawings, identical or similar elements and / or parts are provided with the same reference numbers, so that a repeated presentation is omitted.

[0060] Fig. 1shows a schematically simplified representation of a device 2 for producing a filter rod 4 in the tobacco processing industry. The device 2 comprises a rod forming device 6 and a gluing device 8. The rod forming device 6 has a conveying element 10, which is, for example, a formatting device, such as a formatting belt or the like. A wrapping material strip 12, for example a wrapping paper strip provided by a reel 14, is arranged on the conveying element 10. In addition to the wrapping material strip 12, filter material 18 is fed to the rod forming device 6, for example via a stuffing nozzle 16. The filter material 18 is, for example, endless filter material free of wrapping material, such as a filter tow.Alternatively, a combination of filter segments, each surrounded by a wrapping, can be supplied as filter material 18. According to such an embodiment, the filter material 18 is not fed to the strand forming device 6 via a stuffing nozzle 16, but rather, for example, via a conveyor drum. The stuffing nozzle 16 is therefore omitted in this exemplary embodiment. The filter material 18 is applied to the wrapping material strip 12. The conveyor element 10 is arranged and configured to convey the filter material 18 together with the wrapping material strip 12 in a material flow direction M through a format channel 20. In the format channel 20, a filter strand 4 surrounded by the wrapping material strip 12 is produced from the filter material 18.

[0061] In order to close the wrapping material strip 12 in the region of a seam, the device 2 comprises the gluing device 8, which is arranged and configured to apply a line of glue.

[0062] Fig. 2 shows in a schematically simplified cross-sectional view the gluing device 8 as well as the filter strand 4 surrounded by the wrapping material strip 12 as a schematically simplified cross-sectional view through the device 2. The filter material 18 is in Fig. 2not shown. The glue line 22 applied by the gluing device 8, shown as a hatched area, is located in an overlap region 24. The wrapping material strip 12 has two longitudinal edges 26a, 26b opposite one another with respect to its longitudinal direction, which at least approximately coincides with the material flow direction M. These longitudinal edges 26a, 26b are each adjoined by a longitudinal edge region 28a, 28b of the wrapping material strip 12. In the overlap region 24, the two longitudinal edge regions 28a, 28b of the wrapping material strip 12 overlap. The wrapping material strip 12 is in two layers in the overlap region 24 and is closed by the glue line 22. The gluing device 8 is designed to apply the glue line 22 to form a seam bond in the overlapping area 24 of the longitudinal edge areas 28a, 28b.

[0063] The strand forming device 6 and / or the gluing device 8 are / is arranged and configured to form a seam connection region 30. A width of the seam connection region 30 is determined by the width B of the overlap region 24 and / or the glue line width LB. The glue line 22 is located in the seam connection region 30. The width B of the overlap region 24 and / or the glue line width LB is / is greater than 3 mm. The width B or the glue line width LB is measured along a circumference of the filter strand 4 wrapped with the wrapping material strip 12. In addition, the measurement is carried out in a plane transverse, in particular perpendicular, to the material flow direction M, thus at least approximately in the Fig. 2 shown cutting plane.

[0064] According to the Fig. 2In the embodiment explained, the seam connection region 30 is defined by the overlap region 24, which extends between the first longitudinal edge 26a and the second longitudinal edge 26b of the wrapping material strip 12. In the overlap region 24, the wrapping material strip 12 is present in two layers.

[0065] Fig. 3 shows a further schematically simplified cross-sectional view illustrating the gluing device 8 and the filter strand 4 wrapped with the wrapping material strip 12. In this exemplary embodiment, the filter material 18 is a supply of filter segments 34 surrounded by a wrapping 32; a section through one of these filter segments 34 is shown as an example. The wrapping 32 of the filter segment 34 is, for example, a wrapping paper.

[0066] The seam connection area 30 is defined according to this embodiment by a glue line width LB. The gluing device 8 is arranged and configured to apply a glue line 22 whose glue line width LB, measured along the circumference of the filter rod 4 surrounded by the wrapping material strip 12, is greater than 3 mm. The glue line width LB is also measured in a plane which is arranged transversely, in particular perpendicularly, to the material flow direction M and at least approximately coincides with the Fig. 3 shown cutting plane.

[0067] The glue line 22 extends beyond the first longitudinal edge 26a of the wrapping material strip 12. An overlap region 24, in which the wrapping material strip 12 is double-layered and which extends between the first longitudinal edge 26a and the second longitudinal edge 26b, thus has a slightly smaller width B than the glue line 22. In other words, the glue line width LB is greater than the width B of the overlap region 24. This results in the glue line 22 being applied partly to the wrapping material strip 12, but also partly to the wrapping 32 of the filter segments 34 used as filter material 18. The filter segments 34 thus serve as a counter-bearing for the glue line 22.

[0068] Fig. 4shows a further schematically simplified cross-sectional view showing the gluing device 8 and the filter strand 4 surrounded by the wrapping material strip 12. For reasons of clarity, the filter material 18 is not shown. The gluing device 8 is configured to apply a glue track 22, which is composed of a cold glue track 36 and a hot glue track 38. The gluing device 8 is configured to apply both hot glue and cold glue. A hot glue track width LBH of the hot glue track 38 is smaller than a cold glue track width LBK of the cold glue track 36. In the illustration of Fig. 4The hot glue track width LBH of the hot glue track 38 must be subtracted from the cold glue track width LBK of the cold glue track 36 shown, since the hot glue track 38 is embedded in the cold glue track 36, for example. Other arrangements of the hot glue track 38 and the cold glue track 36 are also provided. The hot glue track 38 and the cold glue track 36 can, for example, be arranged next to each other. The glue track widths LBH, LBK are again measured along the circumference of the filter strand 4 wrapped with the wrapping material strip 12. Again, the measurement is carried out in a plane transverse, in particular perpendicular, to the material flow direction M. This plane coincides at least approximately with the Fig. 4 The cold glue track width LBK of the cold glue track 36 is, for example, larger than the hot glue track width LBH of the hot glue track 38 by one of the following factors: 1.5; 2; 2.5; 3; 3.5; 4; 4.5; 5.

[0069] The seam connection area 30, which can be defined by the width B of the overlap area 24 and / or the glue line width LB of the glue line 22, is greater than 3 mm. The width of the seam connection area 30 is, for example, greater than 3.5 mm, 4 mm, 4.5 mm, 5 mm, or even 5.5 mm. Furthermore, the width of the seam connection area 30 can be in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm.

[0070] The gluing device 8 is designed according to the Fig. 2 and 3 The illustrated embodiments are designed to process exclusively cold glue as the material for the glue track 22. According to the Fig. 4In the illustrated embodiment, the gluing device 8 is configured to process both hot glue and cold glue. The gluing device 8 is configured, for example, to apply a single line of glue 22. The gluing device 8 can also be configured to apply multiple lines of glue, in particular two lines of glue, for example, one line of hot glue and one line of cold glue.

[0071] Downstream of the gluing device 8 (cf. Fig. 1) there is a heatable cover strip 40. With the help of the heatable cover strip 40, the glue track 22 can be pre-dried. This can ensure that the glue dries in order to generate a required initial adhesive strength. Furthermore, a heating skid 42 for heating and drying the glue track 22 can be provided downstream of the gluing device 8. A width of this heating skid 42, which is also measured along a circumference of the filter strand 4 wrapped with the wrapping material strip 12, is smaller than a width LB of the glue track 22. The width of the heating skid 42 is in turn measured in a plane transverse, in particular perpendicular, to the material flow direction M. With the help of a narrow heating skid 42, efficient drying of the glue track 22 can be achieved.

[0072] Fig. 5shows a product, for example an HNB product 44, from the tobacco processing industry. This comprises, for example, a filter segment 46, which was cut to length from a filter rod 4 and which was manufactured using a device 2 as previously described. In addition to the filter segment 46, the HNB product 44 comprises, for example, a tobacco segment 48 and a cooling section 50.

[0073] Examples of implementation: 1. Device (2) for producing a filter rod (4) of the tobacco processing industry, comprising: a rod forming device (6) with a conveying element (10) on which a wrapping material strip (12) is arranged, to which filter material (18) can be applied, wherein the conveying element (10) is designed to convey the filter material (18) together with the wrapping material strip (12) in a material flow direction (M) for forming a filter rod (4) surrounded by the wrapping material strip (12) from the filter material (18) through a format channel (20) of the rod forming device (6), a gluing device (8) for applying a glue line (22), wherein the wrapping material strip (12) has two longitudinal edges (26a, 26b) opposite one another with respect to its longitudinal direction, to each of which a longitudinal edge region (28a, 28b) of the wrapping material strip (12), wherein the gluing device (8) is arranged toto form a seam bond, the glue track (22) is applied at least in an overlapping region (24) of the longitudinal edge regions (28a, 28b), characterized in that the strand forming device (6) is designed and configured to form an overlapping region (24) whose width (B) is measured between the longitudinal edges (26a, 26b) of the wrapping material strip (12), and / or the gluing device (8) is designed and configured to apply a glue track (22) with a glue track width (LB), wherein the width (B) of the overlapping region (24) and / or the glue track width (LB), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), is / is greater than 3 mm. 2. Device (2) according to claim 1, characterized in that the width (B) of the overlapping area (24) and / or the glue track width (LB) is greater than 3.5 mm,in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm. 3. Device (2) according to claim 1, characterized in that the width (B) of the overlapping region (24) and / or the glue track width (LB) is / are in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm. 4. Device (2) according to one of claims 1 to 3, characterized in that the gluing device (8) is designed to process exclusively cold glue as material for the glue track (22). 5. Device (2) according to one of claims 1 to 3, characterized in that the gluing device (8) is designed to apply a cold glue track (36) made of cold glue and a hot glue track (38) made of hot glue, which together form the glue track (22),wherein a cold glue track width (LBK) of the cold glue track (36) is greater than a hot glue track width (LBH) of the hot glue track (38), wherein the cold glue track width (LBK) and the hot glue track width (LBH) are each measured along the circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), and wherein in particular the cold glue track width (LBK) is greater than the hot glue track width (LBH) by a factor of 1.5; in particular by a factor of 2; furthermore in particular by a factor of 2.5; furthermore in particular by a factor of 3; furthermore in particular by a factor of 3.5; furthermore in particular by a factor of 4; furthermore in particular by a factor of 4.5 and furthermore in particular by a factor of 5. 6. Device (2) according to one of claims 1 to 4, characterized in that the gluing device (8) is designed to apply a single or several, in particular two, glue lines (22),is arranged and configured. 7. Device (2) according to one of claims 1 to 6, characterized in that the gluing device (8) is configured to apply glue to the overlapping area (24) along its entire width (B). 8. Device (2) according to one of claims 1 to 7, characterized by a cover strip (40) provided with a preheating device, which, viewed along the circumference of the filter strand (4), is arranged to at least partially cover the overlapping area (24), and which is configured to pre-dry the glue line (22). 9. Device (2) according to one of claims 1 to 8, characterized in that the width (B) of the overlapping area (24) is greater than 3 mm and the filter material (18) is an endless filter material free of wrapping material, in particular filter tow. 10. Device (2) according to one of claims 1 to 8, characterized inthat the glue track width (LB) is greater than 3 mm and the filter material (18) is an assembly of filter segments (34) each surrounded by a wrapping (32), wherein the gluing device (8) is arranged and configured to apply the glue track (22) partially to the wrapping (32) of the filter segments (34) and partially to the wrapping material strip (12). 11. Device (2) according to one of claims 1 to 10, characterized by a heating skid (42) arranged downstream of the gluing device (8) for heating and drying the glue track (22), wherein a width of the heating skid (42), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12), in a plane transverse, in particular perpendicular, to the material flow direction (M), is smaller than the glue track width (LB). 12. Method for producing a filter rod (4) of the tobacco processing industry,comprising the following steps: forming a filter strand (4) surrounded by the wrapping material strip (12) from a filter material (18) by conveying it through a format channel (20) of a strand forming device (6), wherein the strand forming device (6) has a conveying element (10) on which a wrapping material strip (12) is arranged, to which the filter material (18) is applied, wherein the conveying element (10) conveys the filter material (18) together with the wrapping material strip (12) in a material flow direction (M) through the format channel (20), applying a line of glue (22) with a gluing device (8), wherein the wrapping material strip (12) has two longitudinal edges (26a, 26b) opposite one another with respect to its longitudinal direction, to which a longitudinal edge region (28a, 28b) of the wrapping material strip (12) is respectively adjoined,wherein the gluing device (8) applies the glue track (22) at least in an overlapping region (24) of the longitudinal edge regions (28a, 28b) to form a seam bond, characterized in that an overlapping region (24) is formed with the strand forming device (6), the width (B) of which is measured between the longitudinal edges (26a, 26b) of the wrapping material strip (12), and / or a glue track (22) with a glue track width (LB) is applied, wherein the width (B) of the overlapping region (24) and / or the glue track width (LB), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), is / is greater than 3 mm. 13. Method according to claim 12, characterized in that the overlapping area (24) is formed with a width (B) and / or the glue line (22) is applied with a glue line width (LB) which is greater than 3.5 mm,in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm. 14. Method according to claim 12, characterized in that the overlap region (24) is formed with a width (B) and / or the glue track (22) is applied with a glue track width (LB) which is / is in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm. 15. Method according to one of claims 12 to 14, characterized in that the gluing device (8) processes exclusively cold glue as material for the glue track (22). 16. Method according to one of claims 12 to 15, characterized in that the gluing device (8) applies a cold glue track (36) made of cold glue and a hot glue track (38) made of hot glue,wherein a cold glue track width (LBK) of the cold glue track (36) is greater than a hot glue track width (LBH) of the hot glue track (38), wherein the cold glue track width (LBK) and the hot glue track width (LBH) are each measured along the circumference of the filter rod (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), and wherein in particular the cold glue track width (LBK) is greater than the hot glue track width (LBH) by a factor of 1.5; in particular by a factor of 2; furthermore in particular by a factor of 2.5; furthermore in particular by a factor of 3; furthermore in particular by a factor of 3.5; furthermore in particular by a factor of 4; furthermore in particular by a factor of 4.5 and furthermore in particular by a factor of 5. 17. Method according to one of claims 12 to 16, characterized in that the gluing device (8) comprises a single or several, in particular two,Glue line(s) (22) are applied. 18. Method according to one of claims 12 to 17, characterized in that the gluing device (8) glues the overlapping area (24) along its entire width (B). 19. Method according to one of claims 12 to 18, characterized in that the glue line (22) is pre-dried with a cover strip (40) which is provided with a preheating device and which, viewed along the circumference of the filter strand (4), at least partially covers the overlapping area (24). 20. Method according to one of claims 12 to 19, characterized in that the width (B) of the overlapping area (24) is greater than 3 mm and an endless filter material free of wrapping material is processed as the filter material (18). 21. Method according to one of claims 12 to 19, characterized in thatthat the glue track width (LB) is greater than 3 mm and the filter material (18) is an assembly of filter segments (34) each surrounded by a covering (32), wherein the gluing device (8) applies the glue track (22) partly to the covering of the filter segments (34) and partly to the wrapping material strip (12). 22. Method according to one of claims 12 to 21, characterized in that the glue track (22) is heated and dried with a heating skid (42) arranged downstream of the gluing device (8), wherein a width of the heating skid (42), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), is smaller than the glue track width (LB), and the glue track (22) is partially cured with the heating skid (42). 23. Use of a filter strand (4) produced by a method according to one of claims 12 to 22,in particular of filter segments (46) cut to length from this filter strand, for the manufacture of products, in particular HNB products (44), of the tobacco processing industry. 24. A product, in particular an HNB product (44), of the tobacco processing industry, comprising at least one filter segment (46) wrapped by a wrapping material strip (12), wherein the wrapping material strip (12) has two longitudinal edges (26a, 26b) opposite one another with respect to its longitudinal direction, to which a longitudinal edge region (28a, 28b) of the wrapping material strip (12) is respectively connected, wherein, to form a seam bond, a glue line (22) is applied at least in an overlap region (24) of the longitudinal edge regions (28a, 28b), characterized in that the overlap region (24), the width (B) of which is measured between the longitudinal edges (26a, 26b) of the wrapping material strip (12), and / or a glue line width (LB) of the glue line (22),is greater than 3 mm and preferably less than 6 mm, wherein the width (B) of the overlap region (24) and / or the glue line width (LB) is measured along a circumference of the filter segment (46) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to a longitudinal direction of the filter segment (46). 25. Product according to claim 24, characterized in that the width (B) of the overlap region (24) and / or the glue line width (LB) is / are greater than 3.5 mm, in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm. 26. Product according to claim 24, characterized in that the width (B) of the overlap region (24) and / or the glue line width (LB) is / are in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm. 27. Product according to one of claims 24 to 26,characterized in that the glue line (22) comprises exclusively cold glue and / or the product comprises a further segment, namely a tobacco-containing segment and / or a segment with an aerosol-forming substrate. ,

[0074] All mentioned features, including those revealed solely in the drawings as well as individual features disclosed in combination with other features, are considered essential to the invention, both individually and in combination. Embodiments according to the invention may be fulfilled by individual features or a combination of several features. List of reference symbols

[0075] 2Device 4Filter strand 6Strand forming device 8Gluing device 10Conveyor element 12Wrapping material strip 14Reel 16Stuffing nozzle 18Filter material 20Format channel 22Glue track 24Overlap area 26a, 26bLongitudinal edges 28a, 28bLongitudinal edge area 30Seam connection area 32Wrapping 34Filter segment 36Cold glue track 38Hot glue track 40Cover strip 42Heating skid 44HNB product 46Filter segment 48Tobacco segment 50Cooling section BWidth MMaterial flow direction LBGlue track width LBBHHot glue track width LBKKold glue track width

Claims

1. Device (2) for producing a filter rod (4) of the tobacco processing industry, comprising: a rod forming device (6) with a conveying element (10) on which a wrapping material strip (12) is arranged, to which filter material (18) can be applied, wherein the conveying element (10) is designed to convey the filter material (18) together with the wrapping material strip (12) in a material flow direction (M) for forming a filter rod (4) surrounded by the wrapping material strip (12) from the filter material (18) through a format channel (20) of the rod forming device (6), a gluing device (8) for applying a glue line (22), wherein the wrapping material strip (12) has two longitudinal edges (26a, 26b) opposite one another with respect to its longitudinal direction, to each of which a longitudinal edge region (28a, 28b) of the wrapping material strip (12), wherein the gluing device (8) is arranged toto form a seam bond, the glue line (22) is applied at least in an overlapping area (24) of the longitudinal edge areas (28a, 28b), , characterized in that the strand forming device (6) is designed and configured to form an overlap region (24) whose width (B) is measured between the longitudinal edges (26a, 26b) of the wrapping material strip (12), and / or the gluing device (8) is designed and configured to apply a glue track (22) with a glue track width (LB), wherein the width (B) of the overlap region (24) and / or the glue track width (LB), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), is / is greater than 3 mm.

2. Device (2) according to claim 1, characterized in thatthe width (B) of the overlapping region (24) and / or the glue track width (LB) is / are greater than 3.5 mm, in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm.

3. Device (2) according to claim 1, characterized in that the width (B) of the overlapping area (24) and / or the glue track width (LB) is / are in one of the following intervals: 3 mm to 6 mm; 3.5 mm to 6 mm; 4 mm to 6 mm; 4.5 mm to 6 mm; 5 mm to 6 mm; 5.5 mm to 6 mm.

4. Device (2) according to one of claims 1 to 3, characterized in that the gluing device (8) is designed to process exclusively cold glue as material for the glue track (22).

5. Device (2) according to one of claims 1 to 3, characterized in thatthe gluing device (8) is designed to apply a cold glue track (36) made of cold glue and a hot glue track (38) made of hot glue, which together form the glue track (22), wherein a cold glue track width (LBK) of the cold glue track (36) is greater than a hot glue track width (LBH) of the hot glue track (38), wherein the cold glue track width (LBK) and the hot glue track width (LBH) are each measured along the circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), and wherein in particular the cold glue track width (LBK) is increased by a factor of 1.5; in particular by a factor of 2; furthermore in particular by a factor of 2.5; furthermore in particular by a factor of 3; furthermore in particular by a factor of 3.5; furthermore in particular by a factor of 4; furthermore, in particular, by a factor of 4.5 and furthermore, in particular, by a factor of 5; is greater than the hot melt track width (LWH).

6. Device (2) according to one of claims 1 to 4, characterized in that the gluing device (8) is arranged and configured to apply a single or several, in particular two, glue lines (22).

7. Device (2) according to one of claims 1 to 6, characterized in that the gluing device (8) is designed to apply glue to the overlapping area (24) along its entire width (B).

8. Device (2) according to one of claims 1 to 7, characterized by a cover strip (40) provided with a preheating device, which, viewed along the circumference of the filter strand (4), is arranged to at least partially cover the overlapping region (24), and which is designed to pre-dry the glue track (22).

9. Device (2) according to one of claims 1 to 8, characterized in thatthe width (B) of the overlapping area (24) is greater than 3 mm and the filter material (18) is an endless filter material free of wrapping material, in particular filter tow.

10. Device (2) according to one of claims 1 to 8, characterized in that the glue track width (LB) is greater than 3 mm and the filter material (18) is an assembly of filter segments (34) each surrounded by a covering (32), wherein the gluing device (8) is arranged and configured to apply the glue track (22) partly to the covering (32) of the filter segments (34) and partly to the wrapping material strip (12).

11. Device (2) according to one of claims 1 to 10, characterized bya heating skid (42) arranged downstream of the gluing device (8) for heating and drying the glue track (22), wherein a width of the heating skid (42), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12), in a plane transverse, in particular perpendicular, to the material flow direction (M), is smaller than the glue track width (LB).

12. A method for producing a filter rod (4) for the tobacco processing industry, comprising the following steps: forming a filter rod (4) surrounded by the wrapping material strip (12) from a filter material (18) by conveying it through a format channel (20) of a rod forming device (6), wherein the rod forming device (6) has a conveying element (10) on which a wrapping material strip (12) is arranged, to which the filter material (18) is applied, wherein the conveying element (10) conveys the filter material (18) together with the wrapping material strip (12) in a material flow direction (M) through the format channel (20), applying a line of glue (22) with a gluing device (8), wherein the wrapping material strip (12) has two longitudinal edges (26a, 26b) opposite one another with respect to its longitudinal direction, to each of which a longitudinal edge region (28a, 28b) of the wrapping material strip (12),wherein the gluing device (8) applies the glue line (22) at least in an overlapping region (24) of the longitudinal edge regions (28a, 28b) to form a seam bond, , characterized in that with the strand forming device (6) an overlapping region (24) is formed, the width (B) of which is measured between the longitudinal edges (26a, 26b) of the wrapping material strip (12), and / or a glue line (22) with a glue line width (LB) is applied, wherein the width (B) of the overlapping region (24) and / or the glue line width (LB), measured along a circumference of the filter strand (4) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to the material flow direction (M), is / is greater than 3 mm.

13. A product, in particular an HNB product (44), of the tobacco processing industry, comprising at least one filter segment (46) wrapped by a wrapping material strip (12), wherein the wrapping material strip (12) has two longitudinal edges (26a, 26b) opposite one another with respect to its longitudinal direction, to each of which a longitudinal edge region (28a, 28b) of the wrapping material strip (12) adjoins, wherein a glue line (22) is applied at least in an overlap region (24) of the longitudinal edge regions (28a, 28b) to form a seam bond, characterized in thatthe overlapping region (24), the width (B) of which is measured between the longitudinal edges (26a, 26b) of the wrapping material strip (12), and / or a glue track width (LB) of the glue track (22), is greater than 3 mm and preferably less than 6 mm, wherein the width (B) of the overlapping region (24) and / or the glue track width (LB) is measured along a circumference of the filter segment (46) wrapped with the wrapping material strip (12) in a plane transverse, in particular perpendicular, to a longitudinal extension direction of the filter segment (46).

14. Product according to claim 13, characterized in that the width (B) of the overlapping region (24) and / or the glue track width (LB) is / are greater than 3.5 mm, in particular greater than 4 mm, furthermore in particular greater than 4.5 mm, furthermore in particular greater than 5 mm and furthermore in particular greater than 5.5 mm.

15. Product according to claim 13 or 14, characterized in thatthe glue track (22) comprises exclusively cold glue and / or the product comprises a further segment, namely a tobacco-containing segment and / or a segment with an aerosol-forming substrate.

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