JP5788650B2 - Method and machine for simultaneously producing at least two tobacco filter rods - Google Patents

Description

  The present invention relates to a method and a machine for simultaneously producing at least two tobacco filter rods.

  The present invention can be used to aid in a double rod machine that manufactures two tobacco filter rods simultaneously, and the following description refers to the double rod machine as an example only.

  Examples of double rod mechanical devices that manufacture two tobacco filter rods simultaneously are described in US Pat.

  A double rod machine that manufactures two tobacco filter rods simultaneously comprises two shaped beams that form respective continuous filter rods and a filtration material supply line for each beam. The supply line receives filter material from a conveyor line that extends between the supply line input station and a reservoir containing two packages of filter material. Each circular cross-section fiber is unwound from the package and fed to the suction device along the conveyor line at the dosing station, where the suction device spreads the two fibers laterally and forms two flat cross-section strips. To. Downstream from the suction device, the two strips along their respective supply lines are a compression unit, an expansion device that blows air on the strip to increase the volume of the strip, and finally the aroma and flexibility of the filtering material Is fed through a processing unit that adds chemicals to the strips to improve performance.

  Each feed line is connected to the shaped beam by a twist assembly, which receives the strip from the feed line and twists the strip into a rope of filtering material and glued on the shaped beam. Supply a rope of filtration material on the paper strip.

  Along each shaped beam, a paper strip is wound laterally around the rope of filtration material to form a continuous filter rod, and at the output of the shaped beam, the management station checks the density of the filter rod. The cutting head then cuts the filter rods laterally to form individual series of filter portions.

International Publication No. 2007/0887848 Pamphlet International Publication No. 2005/058079 Pamphlet UK Patent Application No. 2265298

  The above type of double rod machinery provides for the simultaneous production of two different filter rods, for example made from different compositions or different densities of filtration material. However, it has been found that the final quality of different filter rods produced at the same time is on average inferior to the final quality of the same filter rod produced at the same time. In other words, the above type of double rod machinery shows a significant decrease in the final quality of the filter when switched from simultaneous production of the same filter to simultaneous production of only slightly different filters.

  It is an object of the present invention to provide a method and machine for simultaneously producing at least two tobacco filter rods that are inexpensive and simple to implement while being configured to eliminate the above disadvantages.

  According to the present invention, there is provided a method and machine for simultaneously manufacturing at least two tobacco filter rods as set forth in the appended claims.

  Non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying drawings.

The schematic front view of the double rod manufacturing machine apparatus which concerns on this invention is shown. FIG. 2 shows a schematic plan view of the mechanical device of FIG. 1. Fig. 2 shows a schematic front view of two shaped beams and a supply unit of the machine device of Fig. 1; Fig. 4 shows a schematic diagram of a tension sensor connected to the supply unit of Fig. 3; FIG. 2 shows a schematic plan view of two shaped beams of the mechanical device of FIG. The schematic sectional drawing of the supply apparatus which adds a powdery and / or granular solid additive to a filtration material is shown. FIG. 2 shows a schematic plan view of the cutting head of the machine device of FIG. FIG. 2 shows a schematic plan view forming the conveying device and the output part of the machine device of FIG. 1.

  Reference numeral 1 in FIG. 1 indicates the entire double rod tobacco filter manufacturing machine. The mechanical device 1 comprises two shaped beams 2a, 2b that simultaneously form respective continuous filter rods 3a, 3b, and respective filtration material supply lines 4a, 4b for each beam 2a, 2b. The supply lines 4a, 4b receive the filtered material from the conveyor line 5, said conveyor line 5 forming part of the machine device 1, including the input station 6 of the supply lines 4a, 4b and two packages of filtered material. It extends between the storage 7 to be.

  As shown in FIGS. 1 and 2, the respective circular cross-section fibers 9a, 9b are unwound from the bundles 8a, 8b and pulled along the conveyor line 5 by the pulling roller assembly 10a of the dosing station 6.

  The conveyor line 5 is arranged on the bundles 8a, 8b to guide the fibers 9a, 9b, and to the feeding station 6 just upstream of the pulling roller assembly 10a. And a suction device 12 for horizontally extending 9b to form strips 13a, 13b having a flat cross section, which strips 13a, 13b are then fed to the pulling roller assembly 10a.

  Downstream of the pulling roller assembly 10a, a compression unit in which the two strips 13a, 13b comprise two pulling roller assemblies 10b, 10c similar to the assembly 10a in a substantially horizontal direction 14 along the respective supply lines 4a, 4b. 15 through an expansion device 16 that blows air on the strips 13a, 13b to increase the volume of the strips 13a, 13b, and chemicals (typically on the strips 13a, 13b to improve the aroma and flexibility of the filtering material. Through the processing unit 17 to which the triacetin is added), finally forming the output of the supply lines 4a, 4b and being fed through a pulling roller assembly 10d similar to the assemblies 10a, 10b, 10c. .

  The supply lines 4a, 4b are connected to the shaped beams 2a, 2b by a twisting assembly 18 arranged immediately downstream from the tension roller assembly 10d, and the twisting assembly 18 is connected to the supply lines 4a, 4b. The strips 13a, 13b are received and the strips 13a, 13b are twisted together to form two ropes of filtering material, and the ropes of filtering material are supplied to the shaped beams 2a, 2b. The supply unit 19 supplies two paper strips 20a, 20b pre-glued from the shaping beams 2a, 2b at the upstream gluing station 21 to the shaping beams 2a, 2b. And in each shaped beam 2a, 2b, a rope of filtration material is fed onto each paper strip 20a, 20b pre-glued at the gluing station 21, at which time each said paper strip 20a, 20b is Wound laterally around a rope of filtration material to form continuous filter rods 3a, 3b.

  At the output of the shaped beams 2a, 2b, the management station 22 confirms the density of the filter rods 3a, 3b, and the cutting head 23 cuts the rods 3a, 3b laterally to produce individual series of filters. A part is formed (not shown).

  The pulling roller assemblies 10a, 10b, 10c, 10d are functionally the same, although differing in size and position along the supply lines 4a, 4b. Accordingly, the following description applies to any one of the assemblies 10a, 10b, 10c, 10d, which are simply referred to as pulling roller assembly 10. Each pulling roller assembly 10 of each supply line 4 is equipped with a pulling device, which likewise comprises two parallel interacting rollers spaced by an adjustable distance. More specifically, each tensioning device has a drive roller that is rotated about its axis of rotation by a respective motor independent of the motor of the drive roller of the same tension roller assembly 10 on the other supply line, and is free to rotate about its axis of rotation. A driven roller that is mounted so as to be idle and is in contact with the driving roller and cooperates with the driving roller.

  Since the two processing lines are sufficiently independent to process the respective materials, the mechanical device 1 as described above can produce two different filter rods 3a, 3b simultaneously. The filter rods 3a, 3b may differ, for example, with respect to the composition and density of the filtration material, with respect to the added additives, or with respect to the extent to which the filtration material is expanded and / or compressed.

  In the preferred embodiment shown in FIG. 2, each package 8 of filtration material has a remotely readable identification code 24 indicating the type of filtration material in the package 8 and the reservoir 7 is a filter. A reading device 25 for automatically and periodically reading the identification code 24 of the material package 8 is provided. More specifically, for each bundle 8 of filtering material, the reader 25 comprises a reader 26 that is arranged in close proximity to the bundle 8 and facing the identification code 24 substantially. Typically, the identification code 24 is a bar code and each reader 26 is an optical bar code reader, or the identification code 24 is included in an electronic radio frequency readable circuit (eg, a transponder). In addition, each reader 26 is a radio frequency reader.

  The management unit 27, which supervises the processing of the filtering material, receives from the reading device 25 two identification codes 24 of the filtration material 8 and the identification codes 24 of the two packings 8 are used for the production of the filter rod 3 for production. Confirm that it matches the recognition code of the processing method 28 that describes the characteristics of the process, and if the recognition code 24 of the two bundles 8 does not match the recognition code of the processing method 28, accept the authorization for manufacturing. refuse. In other words, the operator selects, on the management unit 27, a processing method 28 that describes the characteristics of the filter rod 3 for manufacturing (ie all the characteristics of the manufacturing material and the processing work to be performed) In order to ensure that the filter material of the package 8 is designated as a condition, the management unit 27 responds to the processing code 28 and the recognition code 24 of the two packages 8 read by the reading device 25. The recognition code 24 to be compared is periodically compared.

  As shown in FIG. 3, each shaped beam 2 comprises a shaped belt 29 that is looped around two end pulleys 30, said shaped belt 29 being used to form a filter rod 3 to filter material. A paper strip 20 is wrapped laterally around a rope of filter material received from the supply line 4. More specifically, each shaped beam 2 comprises a fixed rail that gradually deforms the shaped belt 29 from a flat shape to a tubular shape in order to wrap the paper strip 20 laterally around the rope of filtration material.

  One end pulley 30 of the forming belt 29 of each forming beam 2 is mounted so as to be able to rotate freely, while the other end pulley 30 is supplied with power by an electric motor 31 to drive the forming belt 29, and The motor 31 is separated and independent from the electric motor 31 of the other forming belt 29, and is controlled by the control device 32. In other words, each shaped beam 2 has its own electric motor 31, which drives the shaping belt 29 and is independent of the electric motor 31 of the other shaped beam 2.

  The supply unit 19 for supplying the paper strip 20 comprises two tension sensors 33, each tension sensor 33 being connected to the respective paper strip 20 to determine the tension of the respective paper strip 20 and each forming. The control device 32 of the beam 2 controls the electric motor 31 in order to adjust the moving speed of each forming belt 29 according to the tension of each paper strip 20 and independently of the other forming beam 2. In other words, the moving speed of the forming belt 29 of the two forming beams 2 depends on the tension of the paper strip 20 measured independently by the tension sensor 33 so as to maintain a predetermined tension of each paper strip 20. (The predetermined tension usually varies depending on the characteristics of the filter rod 3 to be manufactured).

  It should be pointed out that the two control devices 32 may adjust the moving speed of the forming belt 29 in order to keep both the paper strips 20 at the same tension or different tensions.

  Independently measuring and adjusting the tension of the paper strips 20 is that each paper strip 20 is in the best possible state (ie, with an appropriate tension that should not be too high to avoid stretching the paper strips 20). Or, ensure that the paper strip 20 is wrapped (with appropriate tension that must not be too low to prevent sagging). In practice, if the two ropes of filter material differ in density (ie, specific weight), a higher density and thus heavier filter material rope with greater kinetic energy at a given speed will have a lower density. It causes a greater increase in friction in the tension of the paper strip 20 than making a rope. Thus, without an independent adjustment of the tension of the two paper strips 20, the difference in tension caused by the rope of filtration material will make it impossible to guarantee the normal tension of both paper strips 20. . On the other hand, by independently adjusting the tension of the two paper strips 20, the tension difference caused by the rope of filtration material will cause the movement of the forming belt 29 to maintain the required tension of each paper strip 20. It can be corrected by adjusting the speed. More specifically, if all other factors are the same, the moving speed of the lower density filter material rope forming belt 29 will cause the tension of the paper strip 20 caused by the higher density filter material rope. In order to compensate for the greater increase in friction at, the moving speed of the denser rope forming belt 29 is slightly greater.

  In the preferred embodiment shown in FIG. 3, the supply unit 19 comprises an unwind station 34 and a cutting station 37, in which the width of the paper strip 20 supplied to the shaping beam 2 is measured. A doubled double paper strip 36 is unwound from the reel 35 and the cutting station 37 longitudinally turns the double paper strip 36 to form two paper strips 20 fed to the forming beam 2. Cut in half. Between the cutting station 37 and the tension sensor 33, the gluing station 21 applies glue to the inner surface of each paper strip 20. The use of one reel 35 of the double paper strip 36 means that only one unwind station 34 is required (which has clear advantages in terms of volume and material supply operations). And halving the number of reel replacement splices compared to solutions featuring two independent reels. On the other hand, using one reel 35 of the double paper strip 36 reduces the degree to which the tension of the paper strip 20 can be managed independently (upstream from the cutting station 37, the paper strip 20 is double strip). (See still connected to 36). As described above, adjusting the speed of movement of the forming belt 29 is substantially the only effective way to independently adjust the tension of the paper strip 20 cut longitudinally from the double strip 36. is there.

  In the preferred embodiment shown in FIG. 4, each tension sensor 33 comprises a pendulum 38 that is mounted to rotate about a rotation axis 39, said pendulum 38 contacting the paper strip 20 and an elastic member. The measuring end 40 is pressed against the paper strip 20 with a predetermined force by 41. Each tension sensor 33 includes a position sensor 42 attached to the pendulum 38 to determine the angular position of the pendulum 38 about the rotation axis 39. The position of the pendulum 38 is related to the tension of the paper strip 20, and thus provides a direct indication of the tension of the paper strip 20 (eg, by means of a table created based on experiments and said table). Then, each position of the pendulum 38 corresponds to the tension of the paper strip 20).

  In the embodiment of FIGS. 5 and 6, the mechanical device 1 includes a supply device 43, which is a powdery and / or granular solid additive 44 (typically but not exclusively). , Activated carbon) is supplied to the filtration material of the supply line 4a, but not to the filtration material of the supply line 4b. In this embodiment, two filters are used in that the filter rod 3a is “black” (ie, contains added activated carbon) while the filter rod 3b is “white” (ie, does not contain added activated carbon). The rod 3 is clearly different. The “black” filter rod 3 a has a higher density than the “white” filter rod 3 a, and therefore, as explained, the moving speed of the two forming belts 29 is the required tension of each paper strip 20. It should be noted that it is essential to be independently adjusted to ensure

  The supply device 43 includes a hopper 45. The hopper 45 contains a solid additive 44 and has a bottom outlet directly above the supply roller 46. The supply roller 46 has a rotation axis 47. It is mounted to rotate around and is now placed on the strip 13a. As the supply roller 46 rotates continuously, the solid additive 44 is periodically conveyed from the bottom outlet of the hopper 45 to the strip 13a, and the amount of solid additive 44 supplied to the strip 13a is determined by the rotational axis. It can be adjusted by adjusting the rotational speed of the supply roller 46 around 47.

  The feed roller 46 collects excess solid additive 44 and prevents it from “soiling” other parts of the machine 1 (ie, not sticking to the strip 13a). And the excess solid additive 44 is contained in a container 48 for delivery to a processing or regeneration route. The container 48 has a horizontal bottom wall 49 just below the strip 13a, two vertical lateral walls 49 on either side of the strip 13a, and a vertical rear wall (not shown) with an inlet opening through which the strip 13a is fed to the container 48. ) And a vertical front wall (not shown) having an outlet opening through which the strip 13a is routed outside the container 48.

  Despite the presence of the container 48, some of the solid additive 44 may still spill from the supply device 43 onto the filtration material of the supply line 4b, thus contaminating the filtration material of the supply line 4b; And a part of solid additive 44 of the filtration material of the supply line 4a may spill downstream from the supply apparatus 43 on the filtration material of the supply line 4b. In order to minimize contamination of the filtration material in the supply line 4b by the solid additive 44, a separation screen 50 is sandwiched between the two supply lines 4 by the supply device 43, and the separation screen 50 is connected to the supply line 4b. The fixed wall which physically shields the supply line 4a from the solid additive 44 of 4a is provided.

  One embodiment comprises an elongate suction device 51 placed between two supply lines 4, said suction device 51 being connected to a suction source 53 and equally spaced along the entire length of the suction device 51. And has a plurality of suction ports 52 separated from each other, and serves to trap some solid additive 44 spilling from the supply line 4a and prevent the solid additive 44 from reaching the supply line 4b. . The suction device 51 is preferably incorporated in the screen 50, and the suction port 52 preferably faces the supply line 4a, as shown in FIG. Placed on the upper wall of the screen 50 (some solid additive 44 spilling from the supply line 4a tends to fall by gravity and therefore, in contrast to just below the screen 50, the The supply line 4b can only be reached beyond the top). It is important to note that the suction device 51 allows a reduction in the height of the screen 50 and thus allows easier access to the supply line 4a.

  Screen 50 (and suction device 51 if incorporated into screen 50) is limited to the scope of supply device 43 or molded from supply device 43 (and thus also through twist assembly 18). Extends to the starting point of the beam 2, or extends between the shaped beams 2 (as shown in FIG. 5), or further through the management station 22 (as shown in FIG. 5) to the cutting head 23 May extend.

  One embodiment includes an electrostatic generator 54 having a positive electrode (negative electrode) that is electrically connected to the solid additive 44 to charge the solid additive 44 positively (negatively). And is electrically connected to the solid additive 44 of the supply line 4b to positively charge the filtering material. The static electricity generator 54 also has a negative electrode (positive electrode), and the negative electrode (positive electrode) is electrically connected to the filtering material of the supply line 4a in order to charge the filtering material negatively (positive).

  In one embodiment, the positive electrode (negative electrode) of the static electricity generator 54 is electrically connected to the supply device 43 to positively charge the solid additive 44 (positive) and the associated filtration material is positively connected. In order to be charged negatively, it is electrically connected to the supply beam 4b and / or to the shaped beam 2b supplied with the filtration material by the supply line 4b, and the negative electrode (positive electrode) of the static electricity generator 54 is In order to negatively charge the associated filter material, it is electrically connected to the supply line 4a and / or to the shaped beam 2a supplied with the filter material by the supply line 4a.

  As a result, the solid additive 44 is electrostatically attracted to the filtration material of the supply line 4a and is electrostatically rejected by the filtration material of the supply line 4b, and thus the solid additive 44 is filtered by the filtration material of the supply line 4a. The possibility of spilling is reduced and the possibility of the solid additive 44 being trapped by the filtration material of the supply line 4b is reduced.

  As explained, the machine device 1 comprises a cutting head 23 downstream from the shaped beam 2. As shown in FIG. 7, the cutting head 23 includes a drum 55 that is mounted so as to rotate about the rotation axis 56 and supports two blades 57, and each of the blades 57 together with the drum 55. When rotating, the two filter rods 3 are each periodically cut transversely into a series of filter parts.

  In a preferred embodiment, the cutting head 23 first cuts the filter rod 3b of filter material not containing the solid additive 44 at each cutting cycle, and then filters the filter material containing the solid additive 44. Each blade 57 is rotated in such a direction as to cut the rod 3a (counterclockwise in FIG. 7). In this manner, each blade 57 cuts the filter rod 3a of the filtering material including the solid additive 44 (and possibly after being contaminated with the solid additive 44), and then removes the solid additive 44. Before the cutting of the filter rod 3b of the filtering material which is not included, it is rotated almost once around the rotation axis 56. At each cutting cycle (ie, after cutting the filter rod 3a of the filtering material containing the solid additive 44 and before cutting the filter rod 3b of the filtering material not containing the solid additive 44), each blade 57 is For cleaning, the cutting head 23 is provided with a cleaning device 58, for example, a pneumatic cleaning device 58, which includes at least one nozzle 59 that blows a jet of compressed air on each blade 57.

  The cutting head 23 is suitably provided with a screen 60 that is sandwiched in the vertical direction between the two filter rods 3 and has a through hole 61, in which the blade 57 moves periodically. While minimizing the movement of some solid additive 44 scattered toward the filter rod 3b.

  The cutting head 23 also preferably comprises a suction device 62 which can be arranged close to the filter rod 3a and / or close to the filter rod 3b (as shown in FIG. 7).

  As shown in FIG. 8, a further management station 63 downstream from the cutting head 23 optically confirms the tip of the filter portion that has been cut from the filter rod 3b of the filtering material that does not contain the solid additive 44. Thus, it is ensured that the tip is not contaminated with the solid additive 44. In practice, the solid additive 44 may be carried by the blade 57 from the filtering material of the filter rod 3a to the filtering material of the filter rod 3b when the filter rod 3 is cut, despite the presence of the screen 60 and the suction device 62. Still, it is possible. The function of the management station 63 is to measure such movement of the solid additive 44 (which movement will clearly concentrate at the tip of the filter part that is cut from the filter rod 3b). If it is found that only a small percentage of the filter portion cut from the filter rod 3b is contaminated with traces of the solid additive 44, the management station 63 is placed downstream from the management station 63 and is managed by the management station 63. An activated reject station 64 (typically pneumatic) rejects the contaminated filter portion. On the other hand, if it is found that a large proportion of the filter portion cut from the filter rod 3b is contaminated with traces of solid additive 44, the management station 63 stops the machine 1 and performs special cleaning. And / or maintenance may be required.

  As shown in FIG. 8, the mechanical device 1 includes a transporting device 65 disposed downstream from the cutting head 23 in order to lift the filter portion and carry it from the cutting head 23 to the output of the mechanical device 1. More specifically, the transport device 65 includes a transport device 66a that carries a filter portion cut from the filter rod 3a, and a transport device 66b that carries a filter portion cut from the filter rod 3b. Each conveying device 66a, 66b includes a drum 67a, 67b that has a peripheral suction seat and is mounted so as to rotate synchronously about the rotation center axis 68a, 68b. The transport devices 66a and 66b may be separated by a screen 69, which may be identical to the screen 50 described above (and thus incorporates its own suction device).

  The management station 63 and the rejection station 64 are preferably incorporated in the transport device 66b of the transport device 65. The management station 63 includes two optical sensors 70 (typically television cameras) disposed on both sides of the drum 67b to simultaneously monitor both tips of each filter portion. The rejection station 64 includes a blower that directs a jet of compressed air on the seat in order to blow the filter portion outward from the seat of the drum 67b.

  The described double rod machine 1 is inexpensive and simple to implement, and by simultaneously manufacturing two different filter rods 3a, 3b, and of the filters from both rods 3a, 3b. By ensuring a high level of quality, it has many advantages. Thus, the described double rod machine 1 has an excellent quality filter comparable to the quality of a filter produced with a single rod machine, even when producing two different filter rods 3a, 3b simultaneously. Provide the manufacture of.

DESCRIPTION OF SYMBOLS 1 Mechanical apparatus 2 Forming beam 3 Filter rod 4 Filter material supply line 19 Supply unit 20 Paper strip 21 Gluing station 29 Forming belt 31 Motor 32 Controller 33 Tension sensor 34 Unwinding station 35 Reel 36 Double paper strip 37 Cutting station 38 Pendulum 39 Rotating axis 40 Measuring end 41 Elastic member 42 Position sensor

Claims (7)

Two filtration material supply lines (4) for supplying filtration materials of different densities ;
A supply unit (19) for supplying two paper strips (20);
Two shaped beams (2) forming simultaneously each filter rod (3), each of the shaped beams (2) receiving a rope of filtration material from the filtration material supply line (4) and said feeding unit Receiving a paper strip (20) from (19) and comprising a forming belt (29) for wrapping said paper strip (20) laterally around a rope of said filter material to form a filter rod (3) 2 A machine (1) for simultaneously producing at least two tobacco filter rods, comprising two shaped beams (2),
Each shaped beam (2) has its own motor (31) that drives the shaped belt (29) and is independent of the other shaped beam (2),
The supply unit (19) comprises two tension sensors (33) respectively connected to the paper strip (20) to determine the tension of the paper strip (20);
Each shaped beam (2) controls the speed of movement of the associated shaped belt (29) depending on the tension of the corresponding paper strip (20) and independent of the other shaped beam (2). the control device for controlling the motor (31) comprises a (32) in order,
Each of the control devices (32) controls the moving speed of the associated forming belt (29) so as to compensate for the difference in tension caused by the ropes of different density of filtration material, so that the corresponding paper strip characterized that you adjust the tension of (20), machinery for manufacturing simultaneously at least two Tsunotabako filter rods (1).   The control device (32) of each shaping beam (2) controls the moving speed of the associated shaping belt (29) in order to keep the tension of the corresponding paper strip (20) equal to a predetermined value. Item 2. The machine device according to Item 1.   The two control devices (32) are arranged to move the forming belt (29) at a moving speed in order to keep the tension of the paper strip (20) equal to the same predetermined value common to both of the paper strips (20). The machine apparatus of Claim 1 or 2 which controls. Each of the tension sensors (33)
A pendulum (38) mounted to rotate about a rotation axis (39), the pendulum (38) having a measuring end (40) in contact with the paper strip (20);
An elastic member (41) pressing the measuring end (40) of the pendulum (38) against the paper strip (20) with a predetermined force;
A position sensor (42) connected to the pendulum (38) and reading the position of the pendulum (38) corresponding to the tension of the paper strip (20). The mechanical device described. The supply unit (19)
An unwinding station (34) in which a double paper strip (36) that doubles the width of the two paper strips (20) fed to the shaping beam (2) is unwound from a reel (35);
From the double paper strip (36), the double paper strip (36) is cut longitudinally in half to form two paper strips (20) for feeding to the forming beam (2). The machine device according to any one of claims 1 to 4, comprising a cutting station (37) to perform.   The supply unit (19) is disposed between the unwinding station (34) and the tension sensor (33) and includes a gluing station (21) for applying glue to one side of each paper strip (20). The mechanical device according to claim 5. Two filtration material supply lines (4) for supplying filtration materials of different densities ;
A supply unit (19) for supplying two paper strips (20);
Two shaped beams (2) forming simultaneously each filter rod (3), each of the shaped beams (2) receiving a rope of filtration material from the filtration material supply line (4) and said feeding unit Receiving a paper strip (20) from (19) and comprising a forming belt (29) for wrapping said paper strip (20) laterally around a rope of said filter material to form a filter rod (3) 2 A machine device (1) comprising two shaped beams (2) and simultaneously producing at least two tobacco filter rods,
Actuating the shaping belt (29) of the two shaping beams (2) by two independent motors;
Determining the tension of each paper strip (20) by means of two tension sensors (33) coupled to the two paper strips (20);
Depending on the tension of the corresponding paper strip (20) and independently of the other shaping beam (2), the shaping device (32) is used to control the moving speed of the shaping belt (29). Controlling a motor (31) that moves the forming belt (29) of the beam (2),
Each of the control devices (32) controls the moving speed of the associated forming belt (29) so as to compensate for the difference in tension caused by the ropes of different density of filtration material, so that the corresponding paper strip It characterized that you adjust the tension of (20), a method of manufacturing at least 2 Tsunotabako filter rods simultaneously.

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