Adjustable unwinding device and cigarette packet packaging production line

Abstract

The utility model belongs to the technical field of unwinding devices, and discloses an adjustable unwinding device and a cigarette packet packaging production line. The adjustable unwinding device comprises a supporting assembly, a power assembly and at least one limiting assembly. Wherein the power assembly is connected to the supporting assembly, the power assembly is used for supporting the coiled material and can drive the coiled material to rotate, and the limiting assembly is connected to the supporting assembly in a fixed position adjustable mode so as to limit the coiled material to move in the axial direction of the coiled material. According to the adjustable unwinding device provided by the utility model, axial deviation or shaking of a coiled material in the unwinding process can be avoided, the stable operation of the unwinding process is ensured, and the working efficiency and the product quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pay -off device technical field especially, it relates to an adjustable pay -off device and cigarette packet packaging production line. BACKGROUND

[0002] At present, the type of cigarette case increases increasingly, and the specification of cigarette transparent paper will change along with it, because cigarette transparent paper is in the form of roll, so different specifications of cigarette transparent paper roll need different pay -off devices to pay -off respectively, in the prior art, usually, the paper roll is placed on two parallel interval arrangement transmission rollers, and the limiting piece is arranged on the side of transmission roller, although it can realize the pay -off of different specifications of paper roll, but cannot avoid the shaking of paper roll in the pay -off process, leading to that the paper roll cannot be paid -off stably, reduces work efficiency and product quality. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of adjustable pay -off device and cigarette packet packaging production line, the adjustable pay -off device can avoid axial deviation or shaking of roll material in pay -off process, ensure that the stable process of pay -off, improve work efficiency and product quality.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] Adjustable pay -off device, comprising:

[0006] Supporting assembly;

[0007] Power assembly, the power assembly is connected to the supporting assembly, the power assembly is used to support roll material, and the power assembly can drive the rotation of the roll material;

[0008] At least one limiting component, the limiting component is fixed position adjustably connected to the supporting assembly, to limit the movement of the roll material along the axial direction of the roll material.

[0009] As preferred, the supporting assembly is provided with a limiting slot, and the limiting component comprises:

[0010] Limiting piece;

[0011] Adjusting piece, the adjusting piece is connected to one end of the limiting piece, and the adjusting piece is fixed position adjustably connected to the limiting slot.

[0012] As preferred, the power assembly comprises:

[0013] Driving piece, the driving piece is fixedly connected to the supporting assembly;

[0014] At least one transmission roller, one end of the transmission roller is in transmission connection with the output end of the driving member, and the other end of the transmission roller is rotationally connected to the support assembly, and the driving member can drive the transmission roller to rotate around the transmission roller axis.

[0015] As preferred, the power assembly comprises two transmission rollers, the two transmission rollers are arranged in parallel and at intervals, and the coiled material can be placed between the two transmission rollers, and the two transmission rollers are in transmission connection with the output end of the driving member.

[0016] As preferred, the adjustable unwinding device comprises two limiting assemblies, and the two limiting assemblies are arranged at intervals at two ends of the coiled material supported by the power assembly.

[0017] As preferred, the support assembly comprises:

[0018] A first support member, the power assembly is connected to the first support member;

[0019] A second support member, the second support member is connected to the first support member, and the limiting assembly is movably connected to the second support member.

[0020] As preferred, the adjustable unwinding device further comprises:

[0021] A pressing assembly, two ends of the pressing assembly are movably connected to the support assembly, the pressing assembly is arranged on the upper side of the power assembly, and the pressing assembly can press on the coiled material.

[0022] As preferred, the support assembly comprises a first support member and a second support member, and the support assembly further comprises:

[0023] A third support member, one end of the third support member is connected to the first support member and / or the second support member, a connecting groove is arranged on the third support member, and the pressing assembly is movably connected in the connecting groove.

[0024] As preferred, the pressing assembly comprises:

[0025] A connecting rod, two ends of the connecting rod are movably connected to the support assembly;

[0026] A pressing roller, the pressing roller is sleeved on the connecting rod, and the pressing roller can rotate around the center of the connecting rod.

[0027] A cigarette package production line, comprising a packaging machine and the adjustable unwinding device, and the adjustable unwinding device is located upstream of the packaging machine.

[0028] The beneficial effects of the utility model are as follows:

[0029] The utility model provides a kind of adjustable unwinding device, including support assembly, power component and at least one limiting component;Wherein, power component is connected to support assembly, power component is used to support roll stock, and power component can drive roll stock rotation, limiting component fixed position is adjustably connected to support assembly, to limit the movement of roll stock along roll stock axial direction.

[0030] During unwinding, roll stock is placed on power component, power component drives roll stock rotation, limiting component is adjustably fixed on support assembly, during unwinding, limiting component can adjust its position on support assembly, to effectively limit the movement of roll stock in axial direction, avoid roll stock axial deviation or sway during unwinding, ensure that the stable progress of unwinding, improve work efficiency and product quality. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the isometric view of the adjustable unwinding device provided by the utility model embodiment;

[0032] Figure 2 It is the plan view of the adjustable unwinding device provided by the utility model embodiment;

[0033] Figure 3 It is Figure 1 Local enlarged view of A in

[0034] In the figure:

[0035] 1, support assembly;11, first support piece;12, second support piece;121, limiting groove;13, third support piece;131, connecting groove;

[0036] 2, power component;21, driving piece;22, transmission roller;23, transmission box;

[0037] 3, limiting component;31, limiting piece;32, adjusting piece;

[0038] 4, compression assembly;41, connecting rod;42, compression roller;43, bearing;

[0039] 5, guide roller;6, roll stock. DETAILED DESCRIPTION

[0040] The utility model will be further explained in detail in connection with the drawings and embodiment.It can be understood that the specific embodiment described here is only used to explain the utility model, and is not limited to the utility model.In addition, it needs to be explained that, in order to facilitate description, only part of the structure related to the utility model is shown in the drawings, not all structures.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides an adjustable unwinding device, which includes a support component 1, a power component 2, and at least one limiting component 3; wherein, the power component 2 is connected to the support component 1, the power component 2 is used to support the roll material 6, and the power component 2 can drive the roll material 6 to rotate, and the limiting component 3 is fixedly and adjustablely connected to the support component 1 to limit the movement of the roll material 6 along the axial direction of the roll material 6.

[0045] During the unwinding process, the coiled material 6 is placed on the power assembly 2, the power assembly 2 drives the coiled material 6 to rotate, the limiting assembly 3 is fixed on the support assembly 1 and the position is adjustable, during the unwinding process, the limiting assembly 3 can adjust its position on the support assembly 1, thereby effectively limiting the movement of the coiled material 6 in the axial direction, avoiding the axial deviation or shaking of the coiled material 6 during the unwinding process, ensuring the stable progress of the unwinding process, and improving the work efficiency and product quality. It should be noted that in the present embodiment, the limiting assembly 3 is adjustable in the axial direction of the coiled material 6 on the support assembly 1

[0046] Optionally, in the present embodiment, the coiled material 6 is a glass paper roll. In other embodiments, the coiled material 6 can also be an aluminum foil roll and the like, which is not limited here.

[0047] Further, as shown in Figure 1 and Figure 2 , the support assembly 1 is provided with a limiting groove 121, and the limiting assembly 3 comprises a limiting piece 31 and an adjusting piece 32; wherein the adjusting piece 32 is connected to one end of the limiting piece 31, and the adjusting piece 32 is fixedly and adjustably connected to the limiting groove 121. By connecting the limiting piece 31 and the adjusting piece 32, and adjustably connecting the limiting piece 31 to the limiting groove 121, the limiting assembly 3 can be limitedly displaced in the limiting groove 121, and at the same time, it will not shake or loosen, thereby ensuring the stability of the coiled material 6 in the axial direction. It should be noted that in the present embodiment, the limiting piece 31 extends in the vertical direction.

[0048] Optionally, as shown in Figure 1 and Figure 2 , in the present embodiment, the limiting piece 31 is a limiting cylinder, and in other embodiments, the limiting piece 31 can also be a limiting plate and the like, which is not limited here.

[0049] Optionally, as shown in Figure 2 , in the present embodiment, the limiting groove 121 is a through groove, the adjusting piece 32 is threadedly connected to one end of the limiting piece 31 through the limiting groove 121, and both the limiting piece 31 and the adjusting piece 32 can abut against the support assembly 1. When changing the position of the limiting piece 31, first loosen the adjusting piece 32, move the adjusting piece 32 in the limiting groove 121, and at the same time, the limiting piece 31 moves, when the limiting piece 31 reaches the predetermined position, tighten the adjusting piece 32, so that the limiting piece 31 and the adjusting piece 32 abut against the support assembly 1. This ensures the close cooperation of the limiting piece 31 and the adjusting piece 32, and at the same time, the adjustment of the limiting assembly 3 is more convenient. Specifically, in the present embodiment, the adjusting piece 32 is a threaded knob. In other embodiments, the adjusting piece 32 can also be clamped or inserted at one end of the limiting piece 31 through the limiting groove 121, or the limiting groove 121 is a recess, and the adjusting piece 32 can be rotatably clamped in the limiting groove 121, which is not limited here.

[0050] Specifically, in the embodiment, as shown in Figure 2 The limiting grooves 121 are arranged in the axial direction of the roll material 6.

[0051] Further, as shown in Figure 1 and Figure 2 The power assembly 2 comprises a driving member 21 and at least one transmission roller 22. The driving member 21 is fixedly connected to the support assembly 1. One end of the transmission roller 22 is in transmission connection with the output end of the driving member 21. The other end of the transmission roller 22 is rotatably connected to the support assembly 1. The driving member 21 can drive the transmission roller 22 to rotate around the axis of the transmission roller 22. The driving member 21 drives the transmission roller 22 to rotate around the axis of the transmission roller 22, thereby driving the roll material 6 to perform the unwinding action. By arranging the driving member 21 and the transmission roller 22, a power source is provided for the unwinding of the roll material 6. It should be noted that in the embodiment, the driving member 21 is a servo motor. The servo motor can actively and accurately control the unwinding speed. In other embodiments, the driving member 21 can also be a linear motor or a rotary cylinder, etc., which is not limited here.

[0052] Optionally, as shown in Figure 1 and Figure 2 In the embodiment, the power assembly 2 further comprises a transmission box 23. One end of the transmission box 23 is in transmission connection with the driving member 21. The other end of the transmission box 23 is in transmission connection with the transmission roller 22. The transmission box 23 can adjust and change the transmission direction of the power of the driving member 21. The power from the driving member 21 is transmitted to the transmission roller 22 in a suitable direction, thereby ensuring the efficient and stable operation of the adjustable unwinding device.

[0053] Optionally, as shown in Figure 1 and Figure 2 In the embodiment, the power assembly 2 comprises two transmission rollers 22. The two transmission rollers 22 are arranged in parallel and at intervals. The roll material 6 can be placed between the two transmission rollers 22. Both of the two transmission rollers 22 are in transmission connection with the output end of the driving member 21. Before unwinding, the roll material 6 is first placed between the two transmission rollers 22. Then the driving member 21 is started to drive the two transmission rollers 22 to rotate, thereby unwinding the roll material 6. By arranging the two transmission rollers 22, the roll material 6 can be placed without the need to disassemble the transmission roller 22 and then set the roll material 6 on the transmission roller 22, which facilitates the placement of the roll material 6 and improves the production efficiency. Specifically, in the embodiment, the driving member 21 drives the two transmission rollers 22 to rotate at the same speed and in the same direction. The stable unwinding of the roll material 6 is ensured, and the production efficiency and product quality are improved. It should be noted that in the embodiment, the two transmission rollers 22 are arranged in parallel and at intervals along the unwinding direction of the roll material 6.

[0054] Further, as shown in Figure 1As shown, the adjustable unwinding device comprises two limiting assemblies 3, which are arranged at the two ends of the coiled material 6 supported by the power assembly 2. By arranging the two limiting assemblies 3, the opposite ends of the coiled material 6 can be accurately limited to prevent the coiled material 6 from axially moving or deviating during the unwinding process, thereby ensuring that the unwinding operation can be smoothly carried out. It should be noted that in the embodiment, the two limiting assemblies 3 are arranged at the two ends of the coiled material 6 along the axial direction of the coiled material 6, and the two limiting assemblies 3 are located on the same straight line. In other embodiments, the limiting assemblies 3 can not be located on the same straight line, which is not limited herein as long as the limiting assemblies 3 can limit the axial direction of the coiled material 6.

[0055] Further, as shown in Figure 1 and Figure 2 , the support assembly 1 comprises a first support 11 and a second support 12; wherein the power assembly 2 is connected to the first support 11, the second support 12 is connected to the first support 11, and the limiting assembly 3 is movably connected to the second support 12. The above arrangement makes the structure of the adjustable unwinding device more compact, saving the occupied space.

[0056] Specifically, in the present embodiment, the second support 12 is a support plate.

[0057] Optionally, in the present embodiment, as shown in Figure 1 , the first support 11 has a U-shaped structure, and the second support 12 is fixedly connected to the opening of the first support 11 along the axial direction of the coiled material 6. The space of the first support 11 is fully utilized. In other embodiments, the first support 11 can also have other forms of structures, such as semicircular or rectangular, which are not limited herein. It should be noted that in the present embodiment, the limiting groove 121 is formed in the second support 12.

[0058] Optionally, as shown in Figure 1 and Figure 2 , in the present embodiment, the driving member 21 is fixedly connected to the first support 11, one end of the transmission roller 22 is in transmission connection with the output end of the driving member 21, and the other end is rotatably connected to the first support 11.

[0059] Optionally, as shown in Figure 1 , in the present embodiment, the second support 12 is located below the transmission roller 22 along the vertical direction, and the second support 12 is located between the two transmission rollers 22. The above arrangement can unwind the coiled material 6 while reasonably utilizing the space between the two transmission rollers 22, thereby improving the space utilization of the adjustable unwinding device and enhancing the compactness and rationality of the adjustable unwinding device.

[0060] Further, as shown in Figure 1As shown, the adjustable unwinding device further comprises a pressing assembly 4, both ends of the pressing assembly 4 are movably connected to the supporting assembly 1, the pressing assembly 4 is arranged on the upper side of the power assembly 2, and the pressing assembly 4 can abut against the coiled material 6. During the unwinding process, the diameter of the coiled material 6 gradually decreases, and the pressing assembly 4 always abuts against the coiled material 6. By applying appropriate pressure, the pressing assembly 4 can effectively control the stability of the coiled material 6 during unwinding, while avoiding the coiled material 6 from spreading outward from the center. It should be noted that in the embodiment, the pressing assembly 4 abuts against the coiled material 6 by its own gravity. As the diameter of the coiled material 6 decreases during the unwinding process, the pressing assembly 4 will always abut against the coiled material 6 by its own gravity, so that the structure of the pressing assembly 4 is simple. In other embodiments, the pressing assembly 4 can be pushed against the coiled material 6 by a pneumatic cylinder, or the pressing assembly 4 can be pulled against the coiled material 6 by a spring, which is not limited herein.

[0061] Optionally, as shown in the drawings, Figure 1 The supporting assembly 1 comprises a first supporting piece 11 and a second supporting piece 12, and further comprises a third supporting piece 13, one end of the third supporting piece 13 is connected to the first supporting piece 11 and / or the second supporting piece 12, and a connecting groove 131 is formed in the third supporting piece 13, and the pressing assembly 4 is movably connected in the connecting groove 131. By forming the connecting groove 131 in the third supporting piece 13, the movement of the pressing assembly 4 is guided, avoiding the deviation or instability of the pressing assembly 4 during movement, and improving the reliability of the adjustable unwinding device.

[0062] Optionally, as shown in the drawings, Figure 1 In the embodiment, the third supporting piece 13 is connected to the second supporting piece 12. In other embodiments, the third supporting piece 13 can be connected to the first supporting piece 11, or the third supporting piece 13 can be connected to both the first supporting piece 11 and the second supporting piece 12, which is not limited herein.

[0063] Specifically, as shown in the drawings, Figure 1 In the embodiment, one end of the third supporting piece 13 is fixedly connected to the second supporting piece 12, and the opposite end of the third supporting piece 13 extends upward in the vertical direction, and the connecting groove 131 is formed in the center of the third supporting piece 13 in the vertical direction. The above arrangement further utilizes the space between the two transmission rollers 22, further improving the space utilization of the adjustable unwinding device. It should be noted that in the embodiment, the connecting groove 131 is a through groove, and the third supporting piece 13 is a supporting plate.

[0064] Optionally, in the embodiment, both ends of the pressing assembly 4 are slidably connected in the connecting groove 131 of the third supporting piece 13, and in other embodiments, both ends of the pressing assembly 4 can be rotatably connected in the connecting groove 131, which is not limited herein.

[0065] Further, as shown in Figure 3 , the pressing assembly 4 comprises a connecting rod 41 and a pressing roller 42; wherein the two ends of the connecting rod 41 are movably connected to the support assembly 1, the pressing roller 42 is sleeved on the connecting rod 41, and the pressing roller 42 can rotate around the center of the connecting rod 41. During unwinding, as the conveying of the coiled material 6, the pressing roller 42 continuously applies uniform and stable pressure to the coiled material 6 while rotating, ensuring that the coiled material 6 always maintains a closely fitted state during unwinding, further ensuring the stability of unwinding. It should be noted that in this embodiment, the cross section of the connecting rod 41 is rectangular, and the two ends of the connecting rod 41 are slidingly connected in the connecting groove 131. In other embodiments, the cross section of the connecting rod 41 can also be circular, etc., which is not limited here.

[0066] Optionally, as shown in Figure 3 , in this embodiment, the pressing assembly 4 further comprises a bearing 43, the outer surface of the outer ring of the bearing 43 is fixedly connected with the inner surface of the pressing roller 42, and the inner surface of the inner ring of the bearing 43 is fixedly connected with the connecting rod 41. The arrangement of the bearing 43 improves the rotating flexibility of the pressing roller 42, avoiding the wrinkling and deformation of the coiled material 6 during unwinding due to poor rotation. It should be noted that in this embodiment, the bearing 43 is a square hole four corner bearing. In other embodiments, the bearing 43 can also be a deep groove ball bearing or a cylindrical roller bearing, which is not limited here.

[0067] Optionally, as shown in Figure 1 and Figure 2 , the adjustable unwinding device further comprises a guide roller 5, which is rotatably connected to the first support 11. The guide roller 5 is a key component for guiding the coiled material 6 during unwinding, so that the guide roller 5 can flexibly rotate with the unwinding of the coiled material 6, thereby effectively guiding the coiled material 6 to move smoothly along the predetermined path, avoiding the problems of deviation of the coiled material 6 during unwinding.

[0068] Specifically, as shown in Figure 1 , in this embodiment, two guide rollers 5 are provided, and the two guide rollers 5 are arranged in parallel and spaced apart. In other embodiments, the number of guide rollers 5 is not limited and can be one, three or four, etc., as long as the guide of the coiled material 6 can be realized.

[0069] The embodiment also provides a cigarette package production line, which comprises a packaging machine and an adjustable unwinding device, and the adjustable unwinding device is located upstream of the packaging machine. By providing the adjustable unwinding device, the axial deviation or shaking of the coiled material 6 during unwinding is avoided, ensuring the stable operation of the unwinding process and improving the work efficiency and product quality

[0070] The working principle of the utility model is:

[0071] Firstly, the specification of the coiled material 6 is determined, then the positions of the two limit members 31 on the second support 12 are adjusted according to the specification of the coiled material 6, the width between the two limit members 31 is ensured to accommodate the coiled material 6, then the two limit members 31 are tightly attached to the two sides of the coiled material 6 along the axial direction of the coiled material 6, next, the coiled material 6 is placed between the two transmission rollers 22, the compression roller 42 is put into the connecting groove 131 of the third support 13 and tightly presses on the coiled material 6, then the two limit members 31 are fixed, the coiled material 6 is stably unwound through the guide roller 5, then the coiled material 6 is connected to the next process flow, the coiled material 6 realizes the normal unwinding state, finally, the driving member 21 is started and the power is transmitted to the transmission roller 22, then the coiled material 6 is rotated to start the unwinding action.

[0072] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An adjustable unwinding device, characterized in that, include: Support component (1); A power assembly (2) is connected to the support assembly (1). The power assembly (2) is used to support the roll material (6) and can drive the roll material (6) to rotate. At least one limiting component (3) is fixedly and adjustablely connected to the support component (1) to restrict the movement of the roll (6) along the axial direction of the roll (6).

2. The adjustable unwinding device according to claim 1, characterized in that, The support component (1) has a limiting groove (121), and the limiting component (3) includes: Limiting component (31); An adjusting member (32) is connected to one end of the limiting member (31), and the adjusting member (32) is fixedly and adjustablely connected to the limiting groove (121).

3. The adjustable unwinding device according to claim 1, characterized in that, The power assembly (2) includes: A driving component (21) is fixedly connected to the support assembly (1); At least one drive roller (22) is provided, one end of which is connected to the output end of the drive member (21), and the other end of which is rotatably connected to the support assembly (1). The drive member (21) is capable of driving the drive roller (22) to rotate around the axis of the drive roller (22).

4. The adjustable unwinding device according to claim 3, characterized in that, The power assembly (2) includes two drive rollers (22) arranged in parallel and spaced apart. The roll material (6) can be placed between the two drive rollers (22). Both drive rollers (22) are connected to the output end of the drive unit (21).

5. The adjustable unwinding device according to any one of claims 1-4, characterized in that, The adjustable unwinding device includes two limiting components (3), which are arranged at intervals at both ends of the roll (6) supported by the power component (2).

6. The adjustable unwinding device according to any one of claims 1-4, characterized in that, The support component (1) includes: The first support member (11) is connected to the power assembly (2); The second support member (12) is connected to the first support member (11), and the limiting component (3) is movably connected to the second support member (12).

7. The adjustable unwinding device according to any one of claims 1-4, characterized in that, The adjustable unwinding device further includes: A clamping assembly (4) is provided, with both ends of the clamping assembly (4) being movably connected to the support assembly (1). The clamping assembly (4) is located on the upper side of the power assembly (2) and can press against the roll material (6).

8. The adjustable unwinding device according to claim 7, characterized in that, The support assembly (1) includes a first support member (11) and a second support member (12), and the support assembly (1) further includes: The third support member (13) has one end connected to the first support member (11) and / or the second support member (12), and the third support member (13) has a connecting groove (131), and the clamping assembly (4) is movably connected in the connecting groove (131).

9. The adjustable unwinding device according to claim 7, characterized in that, The clamping assembly (4) includes: A connecting rod (41), the two ends of which are movably connected to the support assembly (1); A pressure roller (42) is sleeved on the connecting rod (41) and is capable of rotating around the center of the connecting rod (41).

10. A cigarette packaging production line, comprising a packaging machine and an adjustable unwinding device as described in any one of claims 1-9, characterized in that, The adjustable unwinding device is located upstream of the packaging machine.

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