Machines for the tobacco processing industry for manufacturing rods, and methods for manufacturing rods in the tobacco processing industry
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KORBER TECHNOLOGIES GMBH
- Filing Date
- 2023-06-16
- Publication Date
- 2026-05-27
AI Technical Summary
Existing tobacco processing machines face challenges in efficiently guiding and tensioning flat webs to form rods, often resulting in undesired structuring and wear, which affects the quality and efficiency of the rod manufacturing process.
A machine comprising a flat web providing device, a structuring device, and a preforming device, with conveying rolls arranged between these to guide the flat web tangentially and adjust tension, using a combination of conveying rolls and forming shoulders to deform the web into a preformed state, minimizing wear and maintaining web tension.
The solution enhances the quality and flexibility of rod formation by reducing wear and dust, allowing for efficient processing of various web widths and diameters, while maintaining web tension and improving the structural integrity of the rods.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a tobacco processing industry machine for manufacturing rods from a flat web, such a machine comprising the following devices arranged one behind the other in the material flow direction: a flat web structuring device, a flat web preforming device, and a rod forming device. Furthermore, the present invention relates to a method for manufacturing a rod in the tobacco processing industry from a flat web.
Background Art
[0002] Flat webs are used for a variety of purposes in the tobacco processing industry and are often processed into endless rods in a continuous process. From such rods, rod-shaped articles in the tobacco processing industry can be manufactured. These articles often form one segment of the products in the tobacco processing industry.
[0003] For example, a flat web made of reconstituted tobacco material (RECON) may be processed into a rod-shaped segment, which is used in HNB products (also referred to as "Heat-Not-Burn" products or "Tobacco-Heated-Product" products). In the case of such products in the tobacco processing industry, the tobacco material is heated and not burned. As a result of the heating, the content substances of the tobacco material are released and carried by an air flow to be provided for consumption.
[0004] Another article manufactured from a rod in the tobacco processing industry is, for example, a segment made of or having a PLA sheet. Such a segment is used, for example, as a cooling element within an HNB product. Another article manufactured in a continuous production process in the tobacco processing industry and cut from an endless rod is a filter element or a filter segment. While many filter elements are manufactured from filter tow, paper filters are manufactured from a flat web.
[0005] One important process step when processing a flat web into, for example, one of the above-mentioned articles is to deform the flat web from its flat state into a rod that is at least approximately circular in cross-section. For this purpose, the flat web is, for example, intertwined transversely with respect to the longitudinal direction of the flat web and subsequently formed into a rod and in particular enveloped within a formatting unit. A flat web preforming device is used to transfer the flat web from its flat web-like state into an intertwined state (from which the flat web is further compressed within the formatting unit). Such flat web preforming devices are known, for example, from Patent Document 1, from Patent Document 2, or from Patent Document 3.
[0006] To facilitate the preforming of the flat web, in particular the intertwining that is carried out transversely with respect to the longitudinal direction of the flat web, the flat web is often subjected to a pretreatment, specifically, for example, such that protrusions and recesses are imparted into the flat web by a pair of rollers. After passing through such a flat web structuring device, which is often a crimper device, the flat web enters the flat web preforming device. The rollers often used for this purpose often have protrusions within the peripheral surface of the roller, and the protrusions interact with recesses provided in the roller located on the opposite side of the pair of rollers. The same applies to the recesses present in the first-mentioned roller, which typically interact with the protrusions of the roller located on the opposite side. By the engagement of the protrusions and recesses of the rollers with each other, appropriately deformed or material-weakened parts are imparted into the flat web. This pretreatment facilitates the subsequent intertwining step.
[0007] However, there are not a few cases where the structuring of the flat web imparted by the flat web structuring device becomes larger than desired or useful for the intertwining process. In such cases, the flat web may be pulled via a sliding edge or a smoothing edge in order to slightly reduce again, for example, the waveform generated by the structuring, and the sliding edge or the smoothing edge allows the material of the flat web to be at least partially redeployed or stretched again. Such a device is known, for example, from Patent Document 4.
Prior Art Documents
Patent Documents
[0008]
Patent Document 1
Patent Document 2
Patent Document 3
Patent Document 4
Summary of the Invention
Problems to be Solved by the Invention
[0009] The problem of the present invention is to present a tobacco processing industry machine for manufacturing a rod from a flat web, and a method for manufacturing a tobacco processing industry rod from a flat web, in which the web guide of the flat web is improved in terms of process technology.
Means for Solving the Problems
[0010] The above problem is solved by a tobacco processing industry machine for manufacturing a rod from a flat web, comprising the following devices arranged one after the other in the material flow direction: a flat web providing device for providing a flat web, a flat web structuring device, in particular a crimping device, capable of imparting a structure into the flat web such that the flat web obtains a modified cross-section in at least some sections in the unfolded state, a flat web preforming device enabling the flat web to transition into a preformed state, and a rod forming device enabling a rod to be manufactured from the preformed flat web. In this machine, which is developed by conveying rolls arranged between the flat web structuring device and the flat web preforming device, the flat web is guided to contact, preferably in the tangential direction, via a winding angle greater than zero and / or less than 95 degrees, by one conveying roll, in particular a plurality of conveying rolls, and / or along one conveying roll, in particular a plurality of conveying rolls, in the material flow direction. The conveying rolls are tailored and configured to guide the unfolded flat web and / or to adjust the web tension of the flat web over the conveying section between the flat web structuring device and the flat web preforming device.
[0011] The flat web structuring device is in particular tailored to impart a three-dimensional structure into the flat web. Furthermore, the flat web structuring device is in particular tailored to emboss a structure into the flat web.
[0012] The structure imparted to the flat web by the flat web structuring device changes the cross-section of the flat web when viewed in a plane that is at least approximately perpendicular to the longitudinal extent of the flat web. In the initial state, i.e., before the flat web enters the flat web structuring device, the cross-section of the flat web is at least approximately rectangular. This shape is changed, at least locally, i.e., in at least some sections, by the deformation process. For example, the deformation may involve a local reduction in the cross-section of the flat web. Similarly, the deformation may also cause, when viewed in cross-section, local warping, bulging, etc. of the flat web, and additionally a reduction in material thickness or a local expansion may also occur.
[0013] Advantageously, the flat web is guided by a transport roll, via the transport roll and / or along the transport roll, so that the web tension of the flat web is maintained at a desired value. Alternatively or additionally, the flat web can be guided by a transport roll, via the transport roll or with the aid of the transport roll. As a guide, the transport roll acts for a flat web that is spread out, i.e., not yet wound up or compressed. The transport of the flat web by the transport roll prevents wear in the flat web compared to known technical solutions where the flat web is deflected via a deflection edge or the like and thus the web tension is maintained.
[0014] The same advantages also apply to the guiding of flat webs. The flat web is guided, in particular, so as to be in tangential contact with the conveying roll in the direction of the material flow. Such tangential guiding is also suitable, alternatively or additionally, for adjusting the desired web tension of the flat web, for open-loop control and / or for closed-loop control, and also for generating the guiding of the flat web. Furthermore, in particular, the flat web is adapted to be guided so as to be in contact over a winding angle with the conveying roll. Such a winding angle is greater than zero and less than 95 degrees. The winding angle should be understood in the context of this specification as the angular range over which the flat web is guided to be in contact with the conveying roll. When the flat web is guided, for example, to be deflected by the conveying roll at least approximately at a right angle, the corresponding winding angle will be at least approximately 90 degrees.
[0015] The conveying roll is specifically configured to be rotatable for this purpose. Furthermore, in particular, the conveying roll is adapted to be configured to rotate about its axis of rotation. Furthermore, in particular, the conveying roll is configured to rotate about its axis of rotation such that it has a peripheral speed equal to, lower than, or higher than the speed of the material flow.
[0016] Thus, the conveying roll can move, for example, at the same speed as the flat web, so that no relative movement, or only a very slight relative movement, occurs between the peripheral surface of the conveying roll and the flat web. Undesirable wear in the flat web and the process dust associated with the wear are avoided.
[0017] In the context of this specification, the material flow is understood as the local direction of the material being conveyed or transported each time. The direction of the material flow locally follows the direction of conveyance and varies with the process step being observed each time, together with the direction of conveyance. The profiling edge extends three-dimensionally, which means that the profiling edge does not extend in a plane.
[0018] According to an advantageous embodiment, the machine is developed by driving the conveying roll. Such a drive may be configured in a passive type, for example, in the form of a freely rotating roll, or in an active type, that is, in the form of a driven roll. The drive may be open-loop controlled or closed-loop controlled. For example, the rotational speed of the conveying roll is adapted to the web speed and is open-loop controlled or closed-loop controlled. With such a configuration of the conveying roll, the wear between the conveying roll and the flat web can be further reduced. As a result, the wear that may occur in the flat web is further significantly reduced.
[0019] According to another advantageous embodiment, a machine in the tobacco processing industry has a flat web preforming device having or formed in the form of a forming shoulder. The forming shoulder has a profiling section that extends substantially transversely to the material flow direction and has a profile that is substantially convexly shaped, and a cylindrical section that extends substantially transversely to the material flow direction and has a profile that is substantially concavely shaped. In particular, the profiling section and the cylindrical section preferably transition into each other along a three-dimensional profiling edge, and the profiling section of the forming shoulder and the cylindrical section are arranged such that the flat web departs from the conveying roll and first comes into contact with the profiling section in at least an approximately flat state in a first conveying direction, and then, after crossing the profiling edge, comes into contact with the cylindrical section in at least a partially wound state in a second conveying direction. Furthermore, the first conveying direction and the second conveying direction are developed by forming an angle located between 71° and 120°, particularly between 71° and 90°, and more particularly at least approximately 90°.
[0020] Due to the described angle between the first transport direction and the second transport direction, the machine can be constructed very compactly. Furthermore, the flat web advantageously comes into contact with the forming shoulders only on one of the two sides of the flat web. This is particularly advantageous for flat webs that are to be coated or wetted.
[0021] According to one embodiment, the forming edge extends three-dimensionally, which means that the forming edge does not extend completely in a plane. According to another embodiment, however, the forming edge is not three-dimensionally configured, that is, the forming edge extends flatly and completely in a plane.
[0022] Furthermore, according to another embodiment, the forming shoulders have right front and left front shoulder elements and right rear and left rear shoulder elements, and the shoulder elements are arranged relative to each other such that the flat web comes into contact first with the front shoulder element as it departs from the transport roll and as seen in the material flow direction, and subsequently comes into contact with the rear shoulder element, and the shoulder elements are in particular individually adjustable.
[0023] The shoulder elements may be adjustable individually and independently of each other, but this is not necessarily the case. According to another embodiment, the shoulder elements are adjustable in pairs, for example.
[0024] The forming shoulders further have in particular a holding structure to which the right front and left front shoulder elements and the right rear and left rear shoulder elements are attached. The adjustability of the shoulder elements enables the forming shoulders to be flexibly adjusted to various requirements regarding rod forming. On the one hand, the forming shoulders can be adjusted to flat webs of different widths. On the other hand, the forming shoulders can be adjusted to different desired diameters of the material rods to be manufactured.
[0025] According to another embodiment, for this purpose, in particular, the machine is developed such that the shoulder element is adjustable in such a way that the length of the forming edge can be changed. Through the extension of the length of the forming edge, the formed shoulder is adapted to flat webs of different widths.
[0026] Furthermore, the formed shoulder is developed in particular such that intermediate pieces of various sizes and / or differently shaped are provided between the shoulder elements in order to provide a continuous forming edge. In particular, the formed shoulder extends between a left front shoulder element and a left rear shoulder element and has a left intermediate piece that continues the forming edge between these two shoulder elements, and a right intermediate piece that continues the forming edge in the region located on the opposite side and extends between a right front shoulder element and a right rear shoulder element. The intermediate element enables a continuous forming edge to be provided even when the shoulder elements are adjusted differently.
[0027] According to another advantageous embodiment, furthermore, the shoulder elements are each adjustable in a linear motion.
[0028] This embodiment is further developed in particular such that the front shoulder element is located in a plane perpendicular to the longitudinal axis of the cylindrical section in the front sliding direction and facing the direction of the center of the cylindrical section, and is slidable along the front sliding direction, and the rear shoulder element is slidable along the rear sliding direction, the rear sliding direction extends obliquely with respect to the above plane and intersects within a straight line at least approximately defined by the longitudinal axis, and this intersection point is located outside the cylindrical section.
[0029] Due to the described linear slidability of the shoulder elements, the formed shoulder is, on the one hand, flexibly adapted, and on the other hand, the structural effort or cost for realizing such a flexible formed shoulder is advantageously within an acceptable range.
[0030] Furthermore, in particular, in order to adjust at least one shoulder element, in particular in order to adjust all shoulder elements, one or more motor-driven actuators are provided. These actuators are realized at a technically feasible effort or cost based on the existing linear adjustability of the shoulder elements.
[0031] According to another embodiment, furthermore, the length of the forming edge of the forming shoulder is between 100 mm and 400 mm, in particular between 100 mm and 300 mm, more particularly between 100 mm and 180 mm or between 180 mm and 300 mm. The forming shoulder, which can be adjusted flexibly within the described parameter range, enables the processing of a large number of different flat webs.
[0032] Advantageously, a web tension required for the forming of the flat web is formed by a conveying roll positioned in a defined arrangement with respect to the forming shoulder. The web tension is an important quality feature for the forming process. The sliding edges often present in forming shoulders according to the prior art are replaced by conveying rolls, whereby dust formation during the process and wear at the forming shoulder can be reduced. Furthermore, the quality of the manufactured product is improved.
[0033] For example, the aforementioned entry angle of 90°, along which the surface of the flat web is introduced into the forming shoulder, enables the design of a very compact machine with a short structural length. At the same time, such a machine can be used flexibly for different web widths. The web width adjustment is carried out via an adjustable shoulder element of the forming shoulder, which can be realized by simple linear sliding. The contact surface provided on one side by the forming shoulder for imparting a shape to the flat web, i.e., for deforming it from a substantially flat state to a substantially circular or cylindrical state, is a surface located on the opposite side that does not come into contact with the forming shoulder, and for example, a liquid such as a flavor carrier or the like can be attached thereto, which is advantageous. Such a flat web that has been processed can be advantageously processed by a machine configured according to the aforementioned embodiments.
[0034] The cylindrical section of the forming shoulder is not necessarily configured in the form of a closed cylinder. In particular, the cylindrical section is not configured to have a completely closed circumferential surface. For example, the cylindrical section has a groove extending along the longitudinal direction of the cylindrical section. The cylindrical section is, for example, in the form of a cylinder jacket, but it may also be configured to taper slightly conically, for example.
[0035] According to another advantageous embodiment, a machine in the tobacco processing industry has been developed in that the conveying roll is a crowned roll and the flat web preforming device has at least one wedge-shaped groove roll.
[0036] With the wedge-shaped groove roll, the flat web can be intertwined transversely with respect to the longitudinal direction of the flat web. For this purpose, the wedge-shaped groove roll can be freely rotatable like the conveying roll, or can be driven without open-loop control or closed-loop control, or with open-loop control or closed-loop control. The conveying roll configured as a crowned roll is also used as a guide for the flat web, especially based on the strong convex shape of the conveying roll, although there is a difference in degree.
[0037] To assist in the folding of the flat web within the sawtooth groove roll, the sawtooth groove roll further has jaws that form the sawtooth grooves, the jaws being interconnected by a connecting shaft, and on the connecting shaft, in particular at the center between the jaws, there may be a support, the cross-section of the support being developed to be larger compared to the connecting shaft.
[0038] The crowned roll maintains the required web tension and additionally or alternatively acts as a guide for the flat web, while the support enables the flat web to be more easily intertwined. This process is developed in another embodiment of the machine where the flat web preforming device has a first sawtooth groove roll and a second sawtooth groove roll, the first sawtooth groove roll interacting with the lower surface of the flat web where the flat web is also guided via or along a conveying roll, and the second sawtooth groove roll interacting with the upper surface of the flat web, in particular being arranged downstream of the first sawtooth groove roll, and can be assisted by being developed according to this embodiment.
[0039] In this context, further, in particular, the first sawtooth groove roll has a first support, the second sawtooth groove roll has a second support, and when viewed in cross-section taken about their respective connecting shafts, the aspect ratio of the height to the width of the second support is larger than that of the first support.
[0040] The second sawtooth groove roll thus has a support that is configured to be thinner and taller than the support of the first sawtooth groove roll. This assists in the lateral intertwining of the flat web. Thus, the flat web can obtain its final shaping before being introduced into the inlet hopper of the formatting unit.
[0041] According to another advantageous embodiment, furthermore, a machine in the tobacco processing industry is a coating device arranged between a flat web structuring device and a flat web preforming device, in particular between the flat web structuring device and a conveying roll, which is designed to apply an additive, in particular a liquid, to the upper surface of the flat web, which is located on the side opposite to the lower surface along which the flat web is guided via or along the conveying roll.
[0042] Both the forming shoulder and the wedge-shaped groove roll come into contact with the flat web only on one side. Therefore, both devices are particularly suitable for the lateral entanglement of a flat web with a liquid applied to its upper surface.
[0043] The machine in the tobacco processing industry, and in particular the coating device, is further configured and designed such that a substance, in particular a liquid, is not applied or cannot be applied to the lower surface of the flat web.
[0044] The lateral entanglement is carried out while taking care of the material and reducing the dust generated during the process, and the machine can be realized with a visible structural effort or cost.
[0045] The flat web is, for example, a paper web. From this paper web, furthermore, a paper filter rod, for example as a rod in the tobacco processing industry, is produced.
[0046] According to another, in itself particularly independent solution to the above problem, there is provided a tobacco processing industry machine for manufacturing rods from a flat web, comprising the following devices arranged one behind the other in the material flow direction: a flat web providing device for providing a flat web, a flat web structuring device, in particular a crimpling device, which is capable of imparting a structure, in particular a three-dimensional structure, to the flat web such that the flat web obtains a modified cross-section in at least some sections in the unfolded state, a flat web preforming device for enabling the flat web to transition into a preformed state, and a rod forming device for enabling a rod to be manufactured from the preformed flat web. This machine is developed in that the flat web preforming device has, or is formed in the form of, a forming shoulder, the forming shoulder having a deformation section extending substantially transversely to the material flow direction and having a contour substantially shaped convexly, and a cylindrical section extending substantially transversely to the material flow direction and substantially shaped concavely and forming an opening, and the flat web preforming device being arranged such that it faces upwards with the opening, preferably being inclined upwards or downwards or arranged parallel to the horizontal line with respect to its extension in the material flow direction.
[0047] The concepts of upwards and downwards mentioned before should be understood in the context of this specification in relation to the horizontal line or the horizontal direction.
[0048] This machine has the same or similar advantages and favorable configurability as already mentioned with regard to the machines according to the remaining embodiments.
[0049] Furthermore, the above problem is a method for manufacturing a rod of the tobacco processing industry from a flat web using a machine of the tobacco processing industry, the machine comprising the following devices arranged one behind the other in the material flow direction: a flat web providing device for providing a flat web, a flat web structuring device for imparting a structure into the flat web such that the flat web obtains a modified cross-section in at least some sections in the unfolded state, in particular a crimping device, a flat web preforming device for transitioning the flat web into a preformed state, and a rod forming device for manufacturing a rod from the preformed flat web. In the method, a transport roll is arranged between the flat web structuring device and the flat web preforming device, and the flat web is guided to contact one transport roll, in particular a plurality of transport rolls, and / or along one transport roll, in particular a plurality of transport rolls, in the material flow direction, preferably in the tangential direction or via a winding angle greater than zero and / or less than 95 degrees. The transport roll is developed for guiding the unfolded flat web and / or adjusting the web tension of the flat web in the transport section between the flat web structuring device and the flat web preforming device. The problem is solved by a method for manufacturing a rod of the tobacco processing industry from a flat web using a machine of the tobacco processing industry.
[0050] According to an advantageous embodiment, furthermore, the transport roll is adapted to be driven. In particular, the transport roll is adapted to be rotationally driven about its axis of rotation. Furthermore, in particular, the transport roll is adapted to be driven such that the transport roll has a peripheral speed equal to, lower than, or higher than the speed of the material flow. The transport roll is in this case driven in particular in an active mode, i.e., open-loop controlled and / or closed-loop controlled. The transport roll may also be configured to be driven in a passive mode.
[0051] According to another embodiment, further, the flat web preforming device has a forming shoulder or is formed in the form of a forming shoulder, the forming shoulder extending substantially transversely to the material flow direction and having a contour that is substantially convexly shaped, a deformation section, and a cylindrical section extending substantially transversely to the material flow direction and having a contour that is substantially concavely shaped, or has them. In particular, the deformation section and the cylindrical section preferably transition along a three-dimensional deformation edge, and in the material flow direction, the flat web starts from the conveying roll and first comes into contact with the deformation section in at least approximately a flat state in a first conveying direction, and then, after crossing the deformation edge, comes into contact with the cylindrical section in at least a partially wound state in a second conveying direction. The first conveying direction and the second conveying direction form an angle located between 71° and 120° (71 degrees and 120 degrees), particularly between 71° and 90° (71 degrees and 90 degrees), and more particularly at least approximately 90° (90 degrees).
[0052] Advantageously, in this method, the forming shoulder has right front and left front shoulder elements and right rear and left rear shoulder elements, and the flat web starts from the conveying roll and, as seen in the material flow direction, first comes into contact with the front shoulder elements and then with the rear shoulder elements. To adapt the forming shoulder to flat webs having different widths, the shoulder elements are particularly individually adjustable, and as a result, the length of the deformation edge is developed by being changed.
[0053] According to another advantageous embodiment, further, the shoulder elements are each adjusted by a linear movement.
[0054] According to another advantageous embodiment, a method for manufacturing a rod in the tobacco processing industry is developed such that the conveying roll is a crowned roll and the flat web preforming device has at least one wedge-shaped groove roll, and the flat web passes through the wedge-shaped groove roll and is preformed by the wedge-shaped groove roll.
[0055] The method has further been developed in particular in that the flat web pre-forming device has a first wedge-shaped groove roll and a second wedge-shaped groove roll, each having a jaw forming a wedge-shaped groove, the jaws being connected to each other by a connecting shaft, on which a support is present, in particular in the center between the jaws, the cross-section of which is larger than that of the connecting shaft, the first wedge-shaped groove roll interacting with the lower surface of the flat web, along which the flat web is also guided via or along the conveying roll, and the second wedge-shaped groove roll interacting with the upper surface of the flat web.
[0056] Furthermore, advantageously, the method is developed in that a coating device is arranged between the flat web structuring device and the flat web pre-forming device, in particular between the flat web structuring device and the transport roll, which coating device applies an additive, in particular a liquid, to an upper surface of the flat web, which is located opposite to a lower surface along which the flat web is guided via or along the transport roll.
[0057] The same or similar advantages and the same or similar development possibilities apply to the method for manufacturing rods for the tobacco processing industry as have already been mentioned previously in the context of the machines for the tobacco processing industry, so that a repeated description will be omitted.
[0058] In the context of the present invention, furthermore, in particular the use of rods manufactured according to a method according to one or more of the above-mentioned embodiments of the tobacco processing industry for manufacturing filters for the tobacco processing industry is envisaged.
[0059] In particular, it is further provided in this connection that a paper web is used as a flat web, so that advantageously a paper filter can be provided, which is from an environmental point of view much superior to conventional filters.
[0060] In terms of use, the same or similar advantages, as well as the same or similar development possibilities and aspects, as already mentioned from the perspective of machines in the tobacco processing industry apply. Therefore, repetitive descriptions will be omitted.
[0061] Further features of the present invention are discernible from the description of the embodiments according to the invention in conjunction with the claims and the accompanying drawings. Embodiments according to the invention can be realized by individual features or combinations of more features.
[0062] Within the scope of the present invention, features described with "in particular" or "preferably" should be construed as optional features.
[0063] The present invention will be described below with reference to the drawings based on embodiments without limiting the general inventive concept. It is specified that the drawings should be referred to for all features of the present invention not described in detail in the text.
Brief Description of the Drawings
[0064]
Figure 1
Figure 2
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Figure 9
Embodiments for Carrying Out the Invention
[0065] In the figures, the same or similar elements and / or members are denoted by the same reference numerals, and thus repeated description thereof will be omitted each time.
[0066] FIG. 1 is a schematic view showing a tobacco processing industry machine 2. By this machine 2, a rod 6 is manufactured from a flat web 4. The machine 2 includes a flat web providing device 8 that provides the flat web 4. The flat web 4 is provided, for example, on a bobbin 10. The flat web providing device 8 may be configured as a bobbin changer. According to such an embodiment, the flat web providing device 8 has more than one holder for receiving the bobbin 10 and, for example, a corresponding splicing device, and the splicing device can connect the individual flat webs 4 present on the respective bobbins 10 to each other to form one endless long flat web 4.
[0067] Downstream in the material flow direction, the machine 2 comprises a flat web structuring device 12, which has, for example, two crimp rollers 14. By means of the crimp rollers 14, a three-dimensional structure is imparted into the flat web 4 and in particular embossed. The flat web 4 then, further in the material flow direction, reaches the coating device 18 via a dancer 16 used for maintaining web tension, open-loop control or closed-loop control and various deflection rollers not shown in detail. By means of the coating device 18, a liquid 22 is applied, for example sprayed, onto the upper surface 20 of the flat web 4. The lower surface 21 located on the opposite side remains dry. Subsequently, the flat web 4 further reaches a conveying roller 24 in the material flow direction and is introduced into a flat web preforming device 26 via or along the conveying roller 24.
[0068] The conveying roller 24 ensures that the flat web 4 is kept under a suitable preload, so that the flat web 4 can transition into a preformed state within the flat web preforming device 26. Starting from the flat web preforming device 26, the preformed flat web 32 reaches a rod forming device 28 in a preformed state. For example, the rod forming device 28 is a formatting unit, and the preformed flat web 32 reaches the formatting unit via an inlet hopper 30. In the formatting unit, a rod 6 is formed from the preformed flat web 32. From the rod 6, a rod-shaped product of the tobacco processing industry, for example a filter rod, can be cut by a cutting device not shown. For example, the flat web 4 is a paper web, and from this paper web, a paper filter rod as the rod 6 is manufactured. Subsequently, a paper filter as a rod-shaped product of the tobacco processing industry is cut from this paper filter rod.
[0069] In the area below FIG. 1, a plan view of the flat web 4 is schematically shown. The flat web 4 exists in its original width up to the flat web preforming device 26, while within the flat web preforming device 26, it is deformed by the intertwined formed bodies or, for example, by a cylinder-shaped formed body. A preformed flat web 32 is produced, and this preformed flat web 32 is formed into the rod 6 within the rod forming device 28.
[0070] Important for the deformation process is the web tension of the flat web 4 at the entry into the flat web preforming device 26. In order to adjust the web tension to a desired value and, for example, to keep it within a predetermined value range, the conveying roll 24 is provided. The conveying roll is further used, in particular, to guide the flat web 4. The conveying roll 24 is configured, for example, to be driven. The conveying roll 24 may also be configured to rotate freely. When the conveying roll 24 is driven, this drive may be open-loop controlled or closed-loop controlled. For example, the speed of the conveying roll 24 is adapted to the web speed of the flat web 4, and a corresponding open-loop control or closed-loop control of the speed of the conveying roll 24 in accordance with the web speed of the flat web 4 is implemented. As a result, the relative movement between the surface of the conveying roll 24 and the flat web 4 is not carried out or is minimized even if it is carried out. Both surfaces, that is, ideally, move at the same speed. Thus, wear in the flat web 4 can be significantly avoided, and the process dust that may occur is avoided or at least significantly reduced.
[0071] According to one embodiment, the flat web preforming device 26 is configured as a forming shoulder 36. This embodiment will be described with reference to FIGS. 2 to 5. According to another embodiment, the flat web preforming device 26 is configured as a wedge-shaped groove roll 38. This embodiment will be described with reference to FIGS. 6 to 9.
[0072] FIG. 2 shows the forming shoulder 36 in a simplified perspective view. The forming shoulder 36 has a deformation section 40 and a cylindrical section 42. Both sections are distributed to different components of the forming shoulder 36 as will be described further below. The deformation section 40 and the cylindrical section 42 transition into each other, for example, along a three-dimensional deformation edge 44. The deformation edge 44 is three-dimensional in the sense that it is not located or extended within a single plane. The cylindrical section 42 is, for example, cylindrical, and the circumferential or inner surface of the cylindrical section 42 does not necessarily form a completely closed surface. For example, within the upper region of the cylindrical section 42, there is a gap extending in the longitudinal direction of the cylindrical section 42 between the shoulder elements 50, 52, which will be described in more detail below.
[0073] The deformation section 40 and the cylindrical section 42 of the forming shoulder 36 are arranged relative to each other such that the flat web 4 in the material flow direction departs from the conveying roll 24 and first comes into contact with the deformation section 40 in at least an approximately flat or planar state and in a first conveying direction T1. Subsequently, the flat web 4 crosses the deformation edge 44 and comes into contact with the cylindrical section 42 in at least a partially wound state and in a second conveying direction T2. In the illustrated embodiment, the first conveying direction T1 and the second conveying direction T2 form an angle of at least approximately 90°.
[0074] The formed shoulder 36 has a right front shoulder element 46 and a left front shoulder element 48. Both front shoulder elements 46, 48 have a curved outer surface, and these curved outer surfaces form a part of the deformation section 40 of the formed shoulder 36. The formed shoulder 36 further has a right rear shoulder element 50 and a left rear shoulder element 52. The rear shoulder elements 50, 52 also have a curved outer surface, and these curved outer surfaces also form a part of the deformation section 40 of the formed shoulder 36. Starting from the conveying roll 24, the flat web 4 first comes into contact with the front shoulder elements 46, 48, and more precisely, the deformation section 40 of the front shoulder elements 46, 48, as seen in the material flow direction corresponding to the first conveying direction T1. After crossing the deformation edge 44, first, the central region of the flat web 4 enters into the cylindrical section 42 of the formed shoulder 36. Downstream of the deformation edge 44, the conveyance of the flat web 4 is carried out in the second conveying direction T2 in a state where it is at least partially wound. The side region or edge region of the flat web 4 further comes into contact with the rear shoulder elements 50, 52, and more precisely, the deformation section 40 of the rear shoulder elements 50, 52, on the upper side. Within this upper region, the flat web 4 is deformed into at least approximately a cylindrical object and is conveyed through the cylindrical section 42 in the direction of the second conveying direction T2. The side edges of the flat web 4 may overlap each other at this time, may be butted against each other, or may have a gap extending in the longitudinal direction of this cylindrical object with respect to each other.
[0075] The shoulder elements 46, 48, 50, 52 are all attached to a single flange 54. There is one guide element 56 between the flange 54 and each of the shoulder elements 46, 48, 50, 52. In FIG. 2, only the right guide element holding the right front shoulder element 46 is visible. Further, a spacer element is provided between the front shoulder elements 46, 48 and the rear shoulder elements 50, 52. The right spacer element 58 extends between the right front shoulder element 46 and the right rear shoulder element 50. By this right spacer element 58, the deformation edge 44 can be continuously continued between the right front shoulder element 46 and the right rear shoulder element 50. On the opposite side, there is a left spacer element 60. The left spacer element 60 extends between the left front shoulder element 48 and the left rear shoulder element 52 and continuously continues the deformation edge 44 between these two shoulder elements 48, 52. Further, a central spacer element 62 may be provided, and the central spacer element 62 continuously continues the deformation edge 44 between the right front shoulder element 46 and the left front shoulder element 48.
[0076] The spacer elements 58, 60, 62 are advantageously provided because the shoulder elements 46, 48, 50, 52 can be adjusted individually. The shoulder elements 46, 48, 50, 52 are each adjustable in a linear motion. For this purpose, the shoulder elements 46, 48, 50, 52 are attached to the corresponding guide elements, for example, via corresponding slotted-hole joints 64. The scale can realize the adjustability of the shoulder elements 46, 48, 50, 52 along a precisely defined adjustment stroke. The shoulder elements 46, 48, 50, 52 are adjustable so that the length of the deformation edge 44 can be changed. Accordingly, various sizes of spacer elements 58, 60, 62 may be provided to realize the corresponding adjustment of the formed shoulder 36.
[0077] The front shoulder elements 46, 48 are slidable along a front sliding direction that is in a plane perpendicular to the longitudinal axis direction L of the cylindrical section 42.
[0078] To adjust the shoulder elements 46, 48, 50, 52, in particular, to adjust all the shoulder elements 46, 48, 50, 52, there may be one motor-driven drive unit or more motor-driven drive units. These drive units (not shown) are realized at a predictable technical effort or cost based on the existing linear adjustability of the shoulder elements 46, 48, 50, 52. Whether the shoulder elements 46, 48, 50, 52 are driven in a motorized manner or are manually adjustable, they may be adjusted individually independently of each other. Similarly, linked adjustability may be provided.
[0079] FIG. 3 shows a simplified front view of the molded shoulder 36, schematically showing a right front sliding direction 66 along which the right front shoulder element 46 is slidable and a left front sliding direction 68 along which the left front shoulder element 48 is slidable. Both sliding directions 66, 68 are oriented in the direction of a single axis that coincides with the longitudinal axis direction L of the cylindrical section 42. Both sliding directions 66, 68, that is, are oriented in the direction of the center of the cylindrical section 42.
[0080] The rear shoulder elements 50, 52 are slidable along rear sliding directions 70, 72, and these rear sliding directions 70, 72 extend obliquely with respect to the aforementioned plane. FIG. 3 schematically shows a right rear sliding direction 70 along which the right rear shoulder element 50 is slidable in that direction and a left rear sliding direction 72 along which the left rear shoulder element 52 is slidable. The rear sliding directions 70, 72 intersect at least approximately within a straight line defined by the longitudinal axis direction L, and this intersection point is located outside the cylindrical section 42.
[0081] By sliding the shoulder elements 46, 48, 50, 52, the length of the forming edge 44 can be changed. In FIG. 3, the forming edge 44 is relatively large, whereas in the illustration of FIG. 4 showing another simplified front view of the forming shoulder 36, the shoulder elements 46, 48, 50, 52 are slid such that the length of the forming edge 44 is smaller. When the forming shoulder 36 is in the state shown in FIG. 4 for example, the flat web 4 can be preformed more strongly compared to the situation where the flat web 4 passes through the forming shoulder 36 in the state shown in FIG. 3. Further, it is possible to process flat webs 4 of different widths. Thus, for example, by the adjustment of the forming shoulder 36 shown in FIG. 3, a flat web 4 much wider than when the forming shoulder 36 is in the state shown in FIG. 4 is processed. The forming shoulder 36 can thus be adjusted flexibly according to flat webs 4 of different widths.
[0082] FIG. 5 shows a simplified side view of the forming shoulder 36. The first and second transport directions T1, T2 are shown, and the first and second transport directions T1, T2 form an angle of at least approximately 90°. The shoulder elements 46, 48, 50, 52 are in the state shown in FIG. 4, that is, they are run to such an extent that the spacer elements 58, 60, 62 are not provided between the shoulder elements 46, 48, 50, 52. Further, the right front sliding direction 66 of the right front shoulder element 46 and the right rear sliding direction 70 of the right rear shoulder element 50 are shown.
[0083] According to another embodiment, instead of using the forming shoulder 36 described above in connection with FIGS. 2 to 4 as the flat web preforming device 26, a wedge-shaped groove roll 38 is used.
[0084] FIG. 6 shows a simplified perspective view of a part of the machine 2 provided with a wedge-shaped groove roll 38 as the preforming device 26. The flat web 4 passes through a crimp roller pair 14 as the flat web structuring device 12 and then reaches a transport roll 24 along the first transport direction T1. The transport roll 24 provides the web tension necessary for subsequent preforming of the flat web 4.
[0085] In the illustrated embodiment, the conveying roll 24 is configured as a crowned roll 74. The flat web 4 advances over the conveying roll 24 toward the wedge-shaped groove roll 38, and the flat web 4 is then conveyed in the direction of a second conveying direction T2. The wedge-shaped groove roll 38 forms the flat web preforming device 26 by folding or intertwining the flat web 4 transversely with respect to the longitudinal direction of the flat web 4. Subsequently, the preformed flat web 32 enters into the inlet hopper 30 of the formatting unit as the rod forming device 28 for further processing. The wedge-shaped groove roll 38 has left and right jaws 76, 78 that form wedge-shaped grooves. The left and right jaws 76, 78 are connected and / or coupled to each other via a coupling shaft 80.
[0086] The first conveying direction T1 is the direction in which the flat web 4 is supplied to the conveying roll 24. The second conveying direction T2 is the direction in which the at least partially intertwined flat web 32 is conveyed downstream of the conveying roll 24. The second conveying direction T2 coincides, for example, with the longitudinal extension direction of the cylindrical section 42 of the forming shoulder 36. In the embodiment shown in FIG. 6, the second conveying direction T2 may coincide with the conveying direction of the intertwined flat web 32 within the rod forming device 28. However, the second conveying direction T2 and the conveying direction of the rod forming device 28 following downstream of the inlet hopper 30 may also deviate slightly from each other.
[0087] The angle between the first conveying direction T1 and the second conveying direction T2 is always defined within one common plane. When the two conveying directions are arranged side by side like vectors, that is, for example, when the tip of the vector regarding the first conveying direction T1 is arranged side by side with the end of the vector regarding the second conveying direction T2, the angle between the two directions is always the smaller of the two possible angles.
[0088] According to one embodiment, it is excluded that the vector of the first transport direction T1 hits against the vector of the second transport direction T2 from above. In other words, in the machines of the tobacco processing industry, according to the embodiment, it is desirable that the web guide is not carried out from above.
[0089] FIG. 7 is another simplified perspective view showing the region of the machine 2 in the region of the wedge-shaped groove roll 38. FIG. 8 shows this situation as seen from the lower surface 21 of the flat web 4. At the center of the connecting shaft 80 connecting the jaws 76, 78, there is a support 82. The support 82 is arranged in the center between the jaws 76, 78 and is enlarged with respect to the connecting shaft 80 in a cross-sectional view. The support 82 assists in entangling the flat web 4.
[0090] FIG. 9 is another simplified perspective detailed view showing the machine 2 of the tobacco processing industry. The flat web preforming device 26 of the machine 2 has a first wedge-shaped groove roll 38a and a second wedge-shaped groove roll 38b. According to this principle, both wedge-shaped groove rolls 38a, 38b are configured like the aforementioned wedge-shaped groove roll 38. The first wedge-shaped groove roll 38a interacts with the lower surface 21 of the flat web 4, and with the lower surface 21, the flat web 4 is also guided via or along the transport roll 24. Exemplarily, the transport roll 24 is also the crowned roll 74. The second wedge-shaped groove roll 38b interacts with the upper surface 20 of the flat web 4 and is arranged, for example, downstream of the first wedge-shaped groove roll 38a.
[0091] The first and second wedge-shaped groove rolls 38a, 38b may each have a differently shaped support 82. For example, the second support 82b is configured such that, when viewed in a plane in which the coupling shaft 80 extends, the aspect ratio of the second support 82b with respect to the height width is larger than the aspect ratio of the first support 82a. In other words, that is, the second support 82b is higher than the first support 82a and is thus configured to be slender. Shaping the supports 82a, 82b differently in this way contributes to the preforming of the flat web 4 in an improved form.
[0092] All of the features described, or features that are only visible in the drawings, and furthermore individual features that are disclosed in combination with other features, are considered to be essential to the present invention, either alone or in combination. Embodiments according to the present invention may be realized by individual features or by combinations of more features.
Explanation of Signs
[0093] 2 Machine 4 Flat web 6 Rod 8 Flat web providing device 10 Bobbin 12 Flat web structuring device 14 Crimp roller 16 Dancer 18 Coating device 20 Upper surface 21 Lower surface 22 Liquid 24 Conveyor roll 26 Flat web preforming device 28 Rod forming device 30 Inlet hopper 32 Preformed flat web 36 Forming shoulder 38 Wedge-shaped groove roll 38a First wedge-shaped groove roll 38b Second wedge-shaped groove roll 40 Deformation Processing Section 42 Cylindrical Section 44 Deformation Processing Edge 46 Right Front Shoulder Element 48 Left Front Shoulder Element 50 Right Rear Shoulder Element 52 Left Rear Shoulder Element 54 Flange 56 Guide Element 58 Right Spacer Element 60 Left Spacer Element 62 Central Spacer Element 64 Elongated Hole Joint 66 Right Front Sliding Direction 68 Left Front Sliding Direction 70 Right Rear Sliding Direction 72 Left Rear Sliding Direction 74 Roll with Crown 76 Left Joe 78 Right Joe 80 Coupling Shaft 82 Support 82a First Support 82b Second Support L Longitudinal Axis Direction T1 First Conveying Direction T2 Second Conveying Direction
Claims
1. A tobacco processing machine (2) for manufacturing rods (6) from flat webs (4), The following devices are arranged in sequence in the material flow direction: A flat web providing device (8) that provides a flat web (4), A flat web structuring device (12), particularly a crimping device, is capable of imparting structure to the flat web (4) so that the flat web (4) obtains a modified cross-section in at least some sections when spread out. A flat web pre-forming apparatus (26) that enables the flat web (4) to transition to a pre-formed state, A rod forming apparatus (28) that enables the production of the rod (6) from the preformed flat web (4), Equipped with, In machine (2), The flat web structuring device (12) and the flat web pre-forming device (26) are provided with a transport roll (24) positioned between them. The flat web (4) is guided to contact one of the transport rolls (24), particularly multiple of the transport rolls (24), and / or along one of the transport rolls (24), particularly multiple of the transport rolls (24), advantageously in the tangential direction or via a winding angle greater than zero and / or less than 95 degrees, The transport roll (24) is designed and configured to guide the spread flat web (4) and / or adjust the web tension of the flat web (4) in the transport section between the flat web structuring device (12) and the flat web preforming device (26). A tobacco processing machine (2) characterized by manufacturing a rod (6) from a flat web (4).
2. The machine (2) according to claim 1, characterized in that the transport roll (24) is driven, preferably to rotate around a rotation axis, in particular to rotate at a peripheral speed equal to, or lower than or higher than, the velocity of the material flow.
3. The flat web preforming apparatus (26) has a molded shoulder portion (36), or is formed in the form of a molded shoulder portion (36), The molded shoulder portion (36) comprises, or has, a deformed section (40) that extends substantially transversely to the material flow direction and has a substantially convex contour, and a tubular section (42) that extends substantially transversely to the material flow direction and has a substantially concave contour, and in particular, the deformed section (40) and the tubular section (42) preferably transition to each other along a three-dimensional deformed edge (44). The deformation processing section (40) and the cylindrical section (42) of the molded shoulder portion (36) are arranged such that, in the material flow direction, the flat web, starting from the transport roll (24), first comes into contact with the deformation processing section (40) in a first transport direction (T1) in a state that is at least approximately flat, and then, after crossing the deformation processing edge (44), comes into contact with the cylindrical section (42) in a state that is at least partially wound up in a second transport direction (T2). Furthermore, the machine (2) according to claim 1 or 2, characterized in that the first transport direction (T1) and the second transport direction (T2) are located between 71° and 120°, particularly between 71° and 90°, and more particularly, form an angle that is at least approximately 90°.
4. The molded shoulder portion (36) has right front and left front shoulder elements (46, 48) and right rear and left rear shoulder elements (50, 52), The shoulder elements (46, 48, 50, 52) are arranged such that, when the flat web (4) starts from the transport roll (24) and is viewed in the material flow direction, it first comes into contact with the front shoulder elements (46, 48), and then subsequently comes into contact with the rear shoulder elements (50, 52). The shoulder elements (46, 48, 50, 52) are, in particular, individually adjustable. The machine (2) according to claim 3, characterized in that
5. The machine (2) according to claim 4, characterized in that the shoulder elements (46, 48, 50, 52) are adjustable so that the length of the deformed edge (44) can be changed.
6. The machine (2) according to claim 4, characterized in that the shoulder elements (46, 48, 50, 52) are each adjustable by linear motion.
7. The aforementioned front shoulder elements (46, 48) are located in a plane perpendicular to the longitudinal axis direction (L) of the cylindrical section (42) in the front sliding direction (66, 68), and are slidable along the front sliding direction (66, 68) facing the center of the cylindrical section (42). The aforementioned rear shoulder elements (50, 52) are slidable along the rear sliding direction (70, 72), The machine (2) according to claim 6, characterized in that the aforementioned sliding directions (70, 72) extend obliquely with respect to the plane and intersect at least approximately in a straight line determined by the longitudinal axis direction (L), and this intersection point is located outside the cylindrical section (42).
8. The machine (2) according to claim 3, characterized in that the length of the deformed edge (44) of the molded shoulder portion (36) is between 100 mm and 400 mm, particularly between 100 mm and 300 mm, and even more particularly between 100 mm and 180 mm or between 180 mm and 300 mm.
9. The machine (2) according to claim 1 or 2, characterized in that the transport roll (24) is a roll (74) with a crown, and the flat web preforming apparatus (26) has at least one wedge-shaped groove roll (38).
10. The wedge-shaped groove roll (38) has jaws (76, 78) that form a wedge-shaped groove, and the jaws (76, 78) are connected to each other by a connecting shaft (80). The machine (2) according to claim 9, wherein a support (82) is present on the coupling shaft (80), particularly in the center between the jaws (76, 78), and the cross-section of the support (82) is larger than that of the coupling shaft (80).
11. The flat web preforming apparatus (26) has a first wedge-shaped groove roll (38a) and a second wedge-shaped groove roll (38b), The machine (2) according to claim 9, characterized in that the first wedge-shaped groove roll (38a) and the second wedge-shaped groove roll (38b) are arranged such that the first wedge-shaped groove roll (38a) interacts with the lower surface of the flat web (4), the flat web (4) is also guided via or along the transport roll (24), and the second wedge-shaped groove roll (38b) interacts with the upper surface of the flat web (4), and is positioned particularly downstream of the first wedge-shaped groove roll (38a).
12. The machine (2) according to claim 11, wherein the first wedge-shaped groove roll (38a) has a first support (82a), and the second wedge-shaped groove roll (38b) has a second support (82b), and when viewed in a cross-section taken with the respective connecting axes as the center, the aspect ratio of the height of the second support (82b) to the width is greater than the aspect ratio of the first support (82a).
13. The machine (2) according to claim 1 or 2, wherein the coating device (18) is positioned between the flat web structuring device (12) and the flat web preforming device (26), particularly between the flat web structuring device (12) and the transport roll (24), and the coating device (18) is configured to coat an additive, particularly a liquid (22), onto the upper surface (20) of the flat web (4) that is located opposite to the lower surface on which the flat web (4) is guided via or along the transport roll (24).
14. A machine (2) according to the broader concept of claim 1, wherein the flat web preforming apparatus (26) has a forming shoulder (36) or is formed in the form of a forming shoulder (36), the forming shoulder (36) having a deformed section (40) that extends substantially transversely to the material flow direction and has a substantially convex contour, and a cylindrical section (42) that extends substantially transversely to the material flow direction and has a substantially concave contour that forms an opening, The flat web preforming apparatus (26) is positioned so as to face upward through the opening, and preferably the flat web preforming apparatus (26) is tilted upward or downward, or positioned parallel to the horizontal line, with respect to its extension in the material flow direction, in the machine (2).
15. A method for manufacturing a tobacco processing rod (6) from a flat web (4) using a tobacco processing machine (2), wherein the machine (2) is comprised of the following devices arranged in sequence in the material flow direction: A flat web providing device (8) that provides a flat web (4), A flat web structuring device (12), particularly a crimping device, provides structure within the flat web (4) so that the flat web (4) has a modified cross-section in at least some sections when it is spread out. A flat web pre-forming apparatus (26) that moves the flat web (4) to a pre-formed state, A rod forming apparatus (28) for manufacturing the rod (6) from the preformed flat web (4), Having, In the method, A transport roll (24) is positioned between the flat web structuring device (12) and the flat web pre-forming device (26). The flat web (4) is guided to contact one of the transport rolls (24), particularly multiple of the transport rolls (24), and / or along one of the transport rolls (24), particularly multiple of the transport rolls (24), advantageously tangentially, or via a winding angle greater than zero and / or less than 95 degrees, the transport rolls (24) guide the spread flat web and / or adjust the web tension of the flat web (4) over the transport section between the flat web structuring device (12) and the flat web preforming device (26). A method for manufacturing a rod (6) for the tobacco processing industry from a flat web (4) using a machine (2) for the tobacco processing industry, characterized by the above.
16. The method according to claim 15, characterized in that the transport roll (24) is driven, preferably so as to rotate around a rotation axis, and in particular so as to rotate at a peripheral speed equal to, or lower than or higher than, the velocity of the material flow.
17. The flat web preforming apparatus (26) has a molded shoulder portion (36), or is formed in the form of a molded shoulder portion (36), The molded shoulder portion (36) comprises, or has, a deformed section (40) that extends substantially transversely to the material flow direction and has a substantially convex contour, and a tubular section (42) that extends substantially transversely to the material flow direction and has a substantially concave contour. In particular, the deformed section (40) and the cylindrical section (42) preferably transition to each other along a three-dimensional deformed edge (44). In the material flow direction, the flat web (4) starts from the transport roll (24) and, in a state at least approximately flat, first comes into contact with the deformed section (40) in the first transport direction (T1), then, having crossed the deformed edge (44), comes into contact with the cylindrical section (42) in the second transport direction (T2) in a state at least partially wrapped. The method according to claim 15 or 16, characterized in that the first transport direction (T1) and the second transport direction (T2) are located between 71° and 120°, particularly between 71° and 90°, and more particularly, form an angle that is at least approximately 90°.
18. The molded shoulder portion (36) has right front and left front shoulder elements (46, 48) and right rear and left rear shoulder elements (50, 52), The flat web (4), starting from the transport roll (24) and viewed in the direction of material flow, first comes into contact with the front shoulder elements (46, 48), and subsequently comes into contact with the rear shoulder elements (50, 52), The method according to claim 17, characterized in that the shoulder elements (46, 48, 50, 52) are individually adjusted in particular to adapt the molded shoulder (36) to flat webs (4) having different widths, thereby changing the length of the deformed edge (44).
19. The method according to claim 18, characterized in that the shoulder elements (46, 48, 50, 52) are each adjusted by linear motion.
20. The transport roll (24) is a roll (74) with a crown attached. The flat web preforming apparatus (26) has at least one wedge-shaped groove roll (38), The method according to claim 15 or 16, characterized in that the flat web (4) passes through the wedge-shaped groove roll (38) and is pre-formed by the wedge-shaped groove roll (38).
21. The flat web preforming apparatus (26) has a first wedge-shaped groove roll (38a) and a second wedge-shaped groove roll (38b), The wedge-shaped groove rolls (38a, 38b) each have jaws (76, 78) that form wedge-shaped grooves. The jaws (76, 78) are connected to each other by a coupling shaft (80), and a support (82) is present on the coupling shaft (80), particularly in the center between the jaws (76, 78), and the cross-section of the support (82) is larger than that of the coupling shaft (80). The first wedge-shaped groove roll (38a) interacts with the lower surface of the flat web (4), which is also guided by the transport roll (24) via or along the transport roll (24). The method according to claim 20, characterized in that the second wedge-shaped groove roll (38b) interacts with the upper surface (20) of the flat web (4).
22. A coating device (18) is positioned between the flat web structuring device (12) and the flat web pre-forming device (26), particularly between the flat web structuring device (12) and the transport roll (24). The method according to claim 15 or 16, characterized in that the coating apparatus (18) coats an additive, particularly a liquid (22), onto the upper surface (20) of the flat web (4) that is located opposite to the lower surface on which the flat web (4) is guided via or along the transport roll (24).