Feeding device for packaging bag processing
By designing a feeding device for packaging bag processing, the problem of position deviation of packaging bags during the conveying process is solved, stable transmission and accurate crease of packaging bags are achieved, and production efficiency and quality are improved.
Patent Information
- Application Number
- CN202421562766.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the production process of packaging bags, the packaging bag is prone to position deviation when transported from one folding device to another device, causing the crease to deviate from the preset position and cannot meet the packaging bag design needs.
A feeding device for packaging bag processing is designed, including a rack, a conveying roller set, a limiting assembly and a pressurizing assembly. The conveying roller group rotates in the length of the frame. The limiting assembly is used to limit the packaging bag. The pressurized assembly applies pressure to its surface when the packaging bag passes, ensuring that the packaging bag is stable along the path of the conveying roller group.
Through this feeding device, the packaging bag can be smoothly transferred to the next folding device, reducing position deviation, ensuring the accuracy of the crease, and improving the production efficiency and quality of the packaging bag.
Smart Images

Figure CN222844918U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of packaging bag production, and in particular to a feeding device for packaging bag processing. Background Art
[0002] Packaging bags are light and easy to carry, have good protection, low cost, easy to store and transport, and have good plasticity and customizability. They are widely used in various industries such as food, medicine, cosmetics, and agriculture. They are used to package various products such as food, daily necessities, etc., meeting the diverse packaging needs of different industries.
[0003] After cutting during the production process, the packaging bags also need to go through processing steps such as folding, shaping and bonding. Among them, the folding process refers to folding the raw materials after cutting so that the raw materials have the preliminary outline of the packaging bag. Therefore, the folding process usually requires the coordinated use of multiple folding equipment to achieve the shape of the packaging bag.
[0004] For example, after device A folds the packaging bag for the first time, the folded packaging bag needs to be transported to device B. Therefore, a conveying device is required to complete the above process. However, in actual application, if the position of the packaging bag deviates during the process of being conveyed from device A to device B, the creases produced by device B during the folding of the packaging bag will deviate from the preset creases, which cannot meet the design requirements of the packaging bag. There is room for improvement. Utility Model Content
[0005] In order to facilitate the conveyance of packaging bags, the present application provides a feeding device for packaging bag processing.
[0006] The present application provides a feeding device for packaging bag processing using the following technical solution:
[0007] A feeding device for processing packaging bags comprises a frame, a conveying roller group, a limiting component and several groups of pressurizing components, wherein the two ends of the frame are a feeding end and a feeding end respectively, and the feeding end and the feeding end are respectively connected to different folding devices, the conveying roller group is rotatably carried on the frame along the length direction of the frame, the limiting component is arranged on the frame, and the limiting component is used to limit the two ends of the packaging bag, and several groups of pressurizing components are arranged on the frame, and when the packaging bag passes between the pressurizing component and the conveying roller group, the pressurizing component applies pressure to the surface of the packaging bag.
[0008] By adopting the above technical scheme, the conveying roller group provides power for the packaging bag to be transported along the frame, so that the packaging bag can be smoothly transported from the loading end of the frame to the unloading end of the frame; the limiting component limits the path of the packaging bag along the conveying roller group, which is beneficial to reducing the position offset of the packaging bag when it is transported along the conveying roller group; at the same time, when the packaging bag passes between the pressure component and the conveying roller group, the pressure component applies a certain pressure to the surface of the packaging bag, thereby further limiting the path of the packaging bag along the conveying roller group, which to a certain extent reduces the probability of the packaging bag being deformed during transportation, thereby forcing the packaging bag to be forced to change the path of the packaging bag along the frame, and plays a positive guiding role in improving the convenience of transporting the packaging bag to the next folding device.
[0009] Preferably, the pressurizing assembly includes a plurality of pressurizing balls, which are in rolling cooperation with the frame, and are used to provide downward pressure in the vertical direction for the packaging bag when the packaging bag passes between the pressurizing balls and the conveying roller group.
[0010] By adopting the above technical solution, since the pressure ball and the frame are in rolling cooperation, when the packaging bag passes between the pressure ball and the conveying roller group, the pressure ball applies pressure to the packaging bag, and the packaging bag provides a reaction force for the pressure ball. During this process, the pressure ball always abuts against the surface of the packaging bag to achieve the purpose of limiting the conveying process of the packaging bag along the conveying roller group, reducing the position offset of the packaging bag when it is conveyed along the conveying roller group, and allowing the packaging bag to pass smoothly between the pressure ball and the conveying roller group.
[0011] Preferably, the frame is provided with a bearing plate along the length direction, the bearing plate is provided with a plurality of limiting holes along the length direction, the number of the limiting holes is the same as the number of the pressure balls, and the plurality of pressure balls are movably placed in the limiting holes in sequence.
[0012] By adopting the above technical solution, the rotation position of the pressurizing ball is limited by the limiting hole, thereby improving the stability of the pressurizing ball during rotation.
[0013] Preferably, the diameter of the limiting hole at one end facing the conveying roller group is smaller than the diameter of the end facing away from the conveying roller group.
[0014] By adopting the above technical solution, since the diameter of the limiting hole toward one end of the conveying roller group is smaller than the diameter away from the one end of the conveying roller group, the diameter of the upper end of the limiting hole is larger than the diameter of the lower end, so that the pressure ball will not fall along the limiting hole when placed in the limiting hole, thereby improving the stability of the pressure ball when placed in the limiting hole.
[0015] Preferably, the conveying roller group is provided with an anti-slip portion, and the anti-slip portion is located below the pressure ball.
[0016] By adopting the above technical solution, the friction force to which the packaging bag is subjected when passing along the conveying roller group is increased by the anti-slip part, thereby reducing the probability of the packaging bag being unable to pass smoothly between the pressure ball and the limiting roller group due to excessive pressure applied by the pressure ball on the surface of the packaging bag.
[0017] Preferably, an auxiliary conveying component is provided at the feeding end of the frame, and the auxiliary conveying component includes a transmission wheel, and the transmission wheel is rotatably supported on the frame located above the conveying roller group, and a gap is formed between the transmission wheel and the conveying roller group for the packaging bag to pass through. When the packaging bag passes along the gap, the transmission wheel rolls in cooperation with the surface of the packaging bag.
[0018] By adopting the above technical solution, when the packaging bag reaches the feeding end of the frame, since only a part of the packaging bag is located on the conveying roller group, through the pressing effect of the transmission wheel, when the packaging bag reaches between the transmission wheel and the conveying roller group, the upper surface and lower surface of the packaging bag respectively abut against the transmission wheel and the conveying roller group, thereby transmitting the power of the conveying roller group to the transmission wheel, and the packaging bag generates rolling friction between the conveying roller group and the transmission wheel, so that the packaging bag reaches the conveying roller group smoothly.
[0019] Preferably, the auxiliary transmission assembly further comprises a mounting seat and a connecting member, wherein the mounting seat is detachably arranged on the frame, the transmission wheel is rotatably connected to the free end of the connecting member, and the fixed end of the connecting member is rotatably connected to the mounting seat.
[0020] By adopting the above technical solution, the gravity of the transmission wheel itself is used to provide rolling friction for the packaging bag to pass between the transmission wheel and the conveying roller group. Since the transmission wheel is rotatably connected to the connecting piece, and the connecting piece is rotatably connected to the mounting seat, the transmission wheel can swing freely in the vertical direction to meet the transmission requirements of packaging bags of different thicknesses without adjusting the mechanical structure, and the practicality is high.
[0021] Preferably, the limiting assembly includes a limiting plate, and the distance between the limiting plate and the frame is gradually reduced from the loading end of the frame to the unloading end of the frame, and the distance between the limiting plate at the unloading end of the frame and the frame is greater than the width of the packaging bag.
[0022] By adopting the above technical solution, since the width between the limit plate and the frame is gradually reduced, the limit plate has the function of guiding and limiting. When the packaging bag just reaches the limit plate, the path of the packaging bag moving along the conveying roller group is gradually trimmed by the limit plate. When the packaging bag reaches the end of the limit plate, the path of the packaging bag along the conveying roller group is trimmed by the limit plate, thereby reducing the position offset of the packaging bag when it is conveyed along the conveying roller group.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. The pressure component applies a certain pressure to the surface of the packaging bag, thereby further limiting the path of the packaging bag along the conveying roller group. This reduces the probability of the packaging bag being deformed during transportation, thereby forcing the packaging bag to change its path along the rack. This plays a positive role in improving the convenience of conveying the packaging bag to the next folding device.
[0025] 2. When the packaging bag passes between the pressure ball and the conveying roller group, the pressure ball applies pressure to the packaging bag, and the packaging bag provides a reaction force for the pressure ball. During this process, the pressure ball always contacts the surface of the packaging bag, reducing the position deviation of the packaging bag when it is conveyed along the conveying roller group, so that the packaging bag can pass smoothly between the pressure ball and the conveying roller group;
[0026] 3. The anti-slip part increases the friction force on the packaging bag when it passes along the conveying roller group, reducing the probability of the packaging bag being unable to pass smoothly between the pressure ball and the limiting roller group due to excessive pressure applied by the pressure ball on the surface of the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the overall structure of a feeding device used for packaging bag processing in an embodiment of the present application.
[0028] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.
[0029] Explanation of the accompanying drawings: 1. Frame; 2. Conveying roller group; 21. Roller body; 3. Limiting assembly; 31. Limiting plate; 32. Adjusting rod; 33. Connecting seat; 4. Pressurizing assembly; 41. Pressurizing ball; 5. Load-bearing plate; 6. Limiting hole; 7. Anti-slip part; 71. Anti-slip sleeve; 8. Auxiliary conveying assembly; 81. Transmission wheel; 82. Mounting seat; 821. Snap-in groove; 822. Rotating shaft; 83. Connecting piece; 9. Support bracket; 10. Load-bearing rod. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-2 This application is described in further detail.
[0031] The present application embodiment discloses a feeding device for packaging bag processing. Figure 1A feeding device for packaging bag processing includes a frame 1, a conveying roller group 2, a limiting component 3 and a plurality of pressure components 4. The two ends of the frame 1 are a feeding end and a unloading end, respectively, and the feeding end and the unloading end are respectively connected to different folding devices. The conveying roller group 2 is rotated along the length direction of the frame 1 and is carried on the frame 1. The limiting component 3 is arranged on the frame 1. The limiting component 3 is used to limit the two ends of the packaging bag. Several groups of pressure components 4 are arranged on the frame 1. When the packaging bag passes between the pressure component 4 and the conveying roller group 2, the pressure component 4 applies pressure to the surface of the packaging bag.
[0032] Specifically, the conveying roller group 2 includes a plurality of roller bodies 21. Since the number of roller bodies 21 is large and can be increased or decreased according to the size of the frame 1, they are not described in detail here. The plurality of roller bodies 21 are rotatably carried on the frame 1 along the length direction of the frame 1, and the spacing between any two adjacent roller bodies 21 is the same. At the same time, the plurality of roller bodies 21 are driven by a driving device, so that the plurality of roller bodies 21 can rotate synchronously along the frame 1. The driving method can be a motor pulley transmission device or a gear transmission device. The specific composition and working principle are not described in detail here.
[0033] Therefore, the implementation principle of a feeding device for packaging bag processing in an embodiment of the present application is as follows: a plurality of rollers 21 rotate synchronously along the frame 1, so that the packaging bag can be smoothly conveyed from the loading end to the unloading end on the frame 1, and the path of the packaging bag conveyed along the plurality of rollers 21 is limited by the limiting component 3, which is beneficial to reducing the position offset of the packaging bag when conveyed along the plurality of rollers 21. At the same time, when the packaging bag passes between the pressure component 4 and the roller 21, a certain pressure is applied to the surface of the packaging bag by the pressure component 4, thereby further limiting the path of the packaging bag conveyed along the roller 21, and to a certain extent reducing the probability of the packaging bag being deformed during the movement of the packaging bag along the plurality of rollers 21, thereby forcing the packaging bag to be forced to change its conveying path along the frame 1, thereby playing a positive guiding role in improving the convenience of conveying the packaging bag to the next folding device.
[0034] Reference Figure 1 and Figure 2 The pressurizing assembly 4 includes a plurality of pressurizing balls 41, which are in rolling cooperation with the frame 1. When the packaging bag passes between the pressurizing balls 41 and the conveying roller group 2, the pressurizing balls 41 are used to provide downward pressure in the vertical direction for the packaging bag.
[0035] Specifically, the number of pressure components 4 can be increased or reduced according to the width of the frame 1. In the present embodiment, three groups of pressure components 4 are provided, and the three groups of pressure components 4 are evenly distributed along the width direction of the frame 1 to achieve the pressurization effect on the packaging bags passing between the pressure components 4 and the plurality of roller bodies 21. Since the components and installation methods of the three groups of pressure components 4 are the same, any one of them is selected for detailed description below.
[0036] Furthermore, a support frame 9 is installed on the frame 1, and the support frame 9 is erected above a plurality of roller bodies 21 along the width direction of the frame 1, wherein the fixed end of the support frame 9 is fixedly connected to the frame 1, and the free end of the support frame 9 is in a suspended state.
[0037] Correspondingly, refer to Figure 1 and Figure 2 The frame 1 is provided with a bearing plate 5 along the length direction. The bearing plate 5 is provided with a plurality of limiting holes 6 along the length direction. The number of the limiting holes 6 is the same as the number of the pressure balls 41. The plurality of pressure balls 41 are movably placed in the limiting holes 6 in sequence.
[0038] Specifically, three bearing plates 5 are provided, and the three bearing plates 5 are installed on the support frame 9 along the length direction of the frame 1. The three bearing plates 5 are all used to place the pressurizing assembly 4. Any one of the bearing plates 5 is selected for detailed description below. At the same time, a plurality of limiting holes 6 are evenly opened along the length direction of the bearing plate 5. Since the number of limiting holes 6 is the same as the number of pressurizing balls 41, and the number of pressurizing balls 41 is relatively large, the number of limiting holes 6 is not limited here.
[0039] Therefore, when the carrying plate 5 is installed on the supporting frame 9, several pressure balls 41 can be placed in the limiting hole 6 at one time. When the packaging bag passes between the pressure balls 41 and the roller body 21, the roller body 21 cooperates with the pressure balls 41 to apply pressure to the surface of the packaging bag, so that the packaging bag can be smoothly transported along the loading end of the frame 1 to the unloading end of the frame 1.
[0040] At the same time, when the packaging bag passes between the pressure ball 41 and the roller body 21, the packaging bag simultaneously applies a reaction force to the pressure ball 41. At this time, the pressure ball 41 located in the limiting hole 6 is lifted up by the reaction force applied by the packaging bag, but the pressure ball 41 is affected by gravity. When the pressure ball 41 is lifted up by the packaging bag, the pressure ball 41 is always in contact with the surface of the packaging bag, reducing the resistance encountered by the packaging bag when passing between the roller body 21 and the pressure ball 41, and at the same time can also meet the passing requirements of packaging bags of different thicknesses.
[0041] Correspondingly, refer to Figure 1 and Figure 2 The diameter of the limiting hole 6 at one end facing the conveying roller group 2 is smaller than the diameter at the end facing away from the conveying roller group 2 .
[0042] Specifically, the contour of the limiting hole 6 is set in an arc shape, so that the diameter of the limiting hole 6 is gradually reduced from the end away from the roller body 21 to the end facing the roller body 21. When the pressure ball 41 is placed in the limiting hole 6, the limiting hole 6 provides a certain supporting force for the pressure ball 41, so that the pressure ball 41 will not fall along the limiting hole 6 when placed in the limiting hole 6, thereby improving the stability of the pressure ball 41 when placed in the limiting hole 6.
[0043] Reference Figure 1 and Figure 2 The conveying roller group 2 is provided with an anti-slip portion 7 , and the anti-slip portion 7 is located below the pressure ball 41 .
[0044] Specifically, several roller bodies 21 are provided with anti-slip parts 7, and the anti-slip parts 7 can be anti-slip sleeves 71, so as to increase the friction force encountered by the packaging bag when passing along the roller body 21. Any roller body 21 is provided with an anti-slip sleeve 71 to reduce the probability of the packaging bag slipping when passing along the roller body 21.
[0045] Reference Figure 1 and Figure 2 An auxiliary conveying assembly 8 is provided at the feeding end of the frame 1, and the auxiliary conveying assembly 8 includes a transmission wheel 81, which is rotatably carried on the frame 1 located above the conveying roller group 2, and a gap is formed between the transmission wheel 81 and the conveying roller group 2 for the packaging bag to pass through. When the packaging bag passes along the gap, the transmission wheel 81 rolls with the surface of the packaging bag.
[0046] Specifically, a load-bearing rod 10 is provided at the feeding end of the frame 1 along the width direction, and the load-bearing rod 10 is erected above the frame 1 to facilitate the installation of the auxiliary conveying assembly 8 .
[0047] At the same time, in this embodiment, two groups of auxiliary transmission components 8 are provided, and the two groups of auxiliary transmission components 8 are evenly distributed along the length direction of the supporting rod 10. Since the components and installation methods of the two groups of auxiliary transmission components 8 are the same, any one of them is selected for detailed description below.
[0048] Correspondingly, refer to Figure 1 and Figure 2 The auxiliary transmission assembly 8 includes a mounting seat 82 and a connecting member 83 . The mounting seat 82 is detachably arranged on the frame 1 . The transmission wheel 81 is rotatably connected to the free end of the connecting member 83 . The fixed end of the connecting member 83 is rotatably connected to the mounting seat 82 .
[0049] Its function is that when the packaging bag reaches the feeding end of the frame 1, since only a part of the packaging bag is located on the roller body 21, through the pressing effect of the transmission wheel 81, when the packaging bag reaches between the transmission wheel 81 and the roller body 21, the upper surface and the lower surface of the packaging bag are respectively in contact with the transmission wheel 81 and the roller body 21, thereby transmitting the power of the roller body 21 to the transmission wheel 81, and the packaging bag generates a rolling friction between the roller body 21 and the transmission wheel 81, so that the packaging bag reaches the roller body 21 smoothly.
[0050] Specifically, the mounting seat 82 is provided with a snap-in groove 821 along the width direction, and the width of the snap-in groove 821 is greater than the width of the load-bearing rod 10, so that the mounting seat 82 can slide smoothly along the load-bearing rod 10 through the snap-in groove 821, so as to facilitate the adjustment of the position of the mounting seat 82 along the load-bearing rod 10. At the same time, a bolt hole is provided on the mounting seat 82, and the bolt hole is threaded through the mounting seat 82 along the side wall of the mounting seat 82. The mounting seat 82 is locked to the load-bearing rod 10 by bolts, thereby improving the stability of the mounting seat 82 when it is installed on the load-bearing rod 10.
[0051] Furthermore, a rotating shaft 822 is provided on the mounting seat 82 , and the rotating shaft 822 is rotatably supported on the mounting seat 82 . Meanwhile, the fixed end of the connecting member 83 is rotatably matched with the rotating shaft 822 .
[0052] Therefore, the gravity of the transmission wheel 81 itself is used to provide rolling friction for the packaging bag along the transmission wheel 81 and the roller body 21. Since the transmission wheel 81 is rotationally connected to the connecting member 83, and the connecting member 83 is rotationally connected to the mounting seat 82 through the rotating shaft 822, the transmission wheel 81 can swing freely in the vertical direction to meet the transmission requirements of packaging bags of different thicknesses without adjusting the mechanical mechanism.
[0053] Reference Figure 1 and Figure 2 The limiting assembly 3 includes a limiting plate 31, and the distance between the limiting plate 31 and the frame 1 is gradually reduced from the feeding end of the frame 1 to the unloading end of the frame 1, and the distance between the limiting plate 31 at the unloading end of the frame 1 and the frame 1 is greater than the width of the packaging bag.
[0054] Specifically, the limit assembly 3 also includes an adjusting rod 32 and a connecting seat 33. The adjusting rod 32 is arranged above the discharge end of the frame 1 along the width direction of the frame 1. At the same time, the fixed end of the connecting seat 33 is slidably matched with the adjusting rod 32, and the connecting seat 33 can be fixed to any position of the adjusting rod 32 by bolts.
[0055] Correspondingly, the limiting plate 31 is fixedly connected to the free end of the connecting seat 33 , and the limiting plate 31 is arranged along the length direction of the frame 1 .
[0056] Therefore, by adjusting the position of the connecting seat 33 along the adjusting rod 32, the distance between the limit plate 31 and the frame 1 in the width direction can be adjusted to meet the limiting requirements of packaging bags of different widths. Since the width between the limit plate 31 and the frame 1 is gradually reduced, the limit plate 31 has a guiding and limiting function. When the packaging bag just reaches the limit plate 31, the path of the packaging bag moving along the conveying roller group 2 is gradually trimmed by the limit plate 31. When the packaging bag reaches the end of the limit plate 31, the limit plate 31 is used to complete the purpose of trimming the path of the packaging bag along the conveying roller group 2, thereby reducing the position offset of the packaging bag when it is conveyed along the conveying roller group 2.
[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A feeding device for packaging bag processing, characterized in that: The invention comprises a frame (1), a conveying roller group (2), a limiting component (3) and a plurality of groups of pressurizing components (4), wherein the two ends of the frame (1) are a feeding end and a feeding end respectively, and the feeding end and the feeding end are respectively connected to different folding devices, the conveying roller group (2) is rotatably supported on the frame (1) along the length direction of the frame (1), the limiting component (3) is arranged on the frame (1), and the limiting component (3) is used to limit the two ends of the packaging bag, and a plurality of groups of pressurizing components (4) are arranged on the frame (1), and when the packaging bag passes between the pressurizing component (4) and the conveying roller group (2), the pressurizing component (4) applies pressure to the surface of the packaging bag.
2. A feeding device for packaging bag processing according to claim 1, characterized in that: The pressurizing assembly (4) comprises a plurality of pressurizing balls (41), wherein the pressurizing balls (41) are in rolling cooperation with the frame (1), and when the packaging bag passes between the pressurizing balls (41) and the conveying roller group (2), the pressurizing balls (41) are used to provide downward pressure in the vertical direction for the packaging bag.
3. A feeding device for packaging bag processing according to claim 2, characterized in that: The frame (1) is provided with a bearing plate (5) along the length direction, and the bearing plate (5) is provided with a plurality of limiting holes (6) along the length direction, the number of the limiting holes (6) is the same as the number of the pressure balls (41), and the plurality of pressure balls (41) are movably placed in the limiting holes (6) in sequence.
4. A feeding device for packaging bag processing according to claim 3, characterized in that: The diameter of the limiting hole (6) at one end facing the conveying roller group (2) is smaller than the diameter of the end facing away from the conveying roller group (2).
5. A feeding device for packaging bag processing according to claim 3, characterized in that: The conveying roller group (2) is provided with an anti-slip portion (7), and the anti-slip portion (7) is located below the pressure ball (41).
6. A feeding device for packaging bag processing according to claim 1, characterized in that: An auxiliary conveying assembly (8) is provided at the feeding end of the frame (1), and the auxiliary conveying assembly (8) comprises a transmission wheel (81), and the transmission wheel (81) is rotatably supported on the frame (1) located above the transmission roller group (2), and a gap is formed between the transmission wheel (81) and the transmission roller group (2) for the packaging bag to pass through, and when the packaging bag passes through the gap, the transmission wheel (81) and the surface of the packaging bag are rollingly matched.
7. A feeding device for packaging bag processing according to claim 6, characterized in that: The auxiliary transmission assembly (8) further comprises a mounting seat (82) and a connecting member (83); the mounting seat (82) is detachably arranged on the frame (1); the transmission wheel (81) is rotatably connected to the free end of the connecting member (83); and the fixed end of the connecting member (83) is rotatably connected to the mounting seat (82).
8. A feeding device for packaging bag processing according to claim 1, characterized in that: The limiting assembly (3) comprises a limiting plate (31), the distance between the limiting plate (31) and the frame (1) being gradually reduced from the loading end of the frame (1) to the unloading end of the frame (1), and the distance between the limiting plate (31) and the frame (1) at the unloading end of the frame (1) is greater than the width of the packaging bag.