Biomedical paper diaper and preparation device thereof

Abstract

The invention discloses a biomedical paper diaper which comprises a paper diaper body, a filling core is arranged in the paper diaper body, waistbands are arranged at the four corners of the paper diaper body, and hook-and-loop fasteners are arranged on the four waistbands. The invention further discloses a preparation device of the biomedical paper diapers, the preparation device comprises a frame body, a top plate is fixedly installed between the inner walls of the two sides of the frame body, and two baffles are fixedly installed at the bottom of the top plate. The vacuum box can tightly abut against the paper diaper to form a temporary sealing layer, external air permeation is blocked, then the main pressing plate moves downwards to automatically compact the filling core body, meanwhile, the side pressing plates can rapidly compact the two sides of the filling core body downwards by means of the elastic force of the first springs, the interior of the vacuum box is automatically vacuumized, the filling core body is better compressed, and the compaction effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of disposable diapers, and particularly to a biomedical disposable diaper and its preparation device. Background Art

[0002] As an indispensable important product in the fields of modern parenting and adult care, disposable diapers are designed to provide users with convenient, comfortable and efficient absorption and protection functions. With the continuous progress of biomedical technologies, the performance requirements for disposable diapers are also increasing day by day. It is not only required to have good water absorption and air permeability, but also to meet higher standards in terms of material safety, environmental protection and compatibility with human skin. Biomedical disposable diapers have emerged as the times require. They integrate advanced biomedical materials and technologies, aiming to enhance the health experience of users and reduce the risks of skin irritation and allergies, becoming the focus of market attention.

[0003] However, in the preparation process of biomedical disposable diapers, traditional devices mostly use the roll pressing method to compact the filling core body. The compaction method is single, and it is difficult to achieve a more efficient compaction effect, which easily leads to voids inside the filling core body, affecting its water absorption performance and the stability of the overall structure. For this reason, we propose a biomedical disposable diaper and its preparation device. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a biomedical disposable diaper and its preparation device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A biomedical disposable diaper includes a diaper main body. A filling core body is arranged inside the diaper main body. Waistbands are arranged at the four corners of the diaper main body. Magic tapes are arranged on the four waistbands. Leak-proof side edges are arranged on both sides of the diaper main body.

[0006] The present invention also discloses a preparation device for a biomedical disposable diaper, including a frame body. A top plate is fixedly installed between the inner walls on both sides of the frame body. Two baffle plates are fixedly installed at the bottom of the top plate. A conveyor belt is arranged below the top plate. First hydraulic cylinders are fixedly installed on the inner walls on both sides of the frame body. Guide plates located above the conveyor belt are fixedly connected to the telescopic ends of the two first hydraulic cylinders. A stress plate is fixedly installed between the inner walls on both sides of the frame body. The stress plate penetrates through the middle of the conveyor belt. The upper side of the stress plate is in contact with the inner side of the conveyor belt. A compaction mechanism is arranged between the two baffle plates. Two groups of symmetrically arranged side pressure mechanisms are arranged on the compaction mechanism. An air extraction mechanism is arranged on the compaction mechanism.

[0007] Preferably, the compaction mechanism includes two second hydraulic cylinders fixedly installed at the bottom of the top plate. The telescopic ends of the two second hydraulic cylinders are fixedly connected to the same upper plate. A vacuum box is arranged below the upper plate. Two sliding rods are arranged through the top of the vacuum box and are slidably connected to the vacuum box. One ends of the two sliding rods are fixedly connected to the bottom of the upper plate, and the other ends of the two sliding rods are fixedly installed with the same main pressing plate located inside the vacuum box. A second spring is fixedly connected between the upper plate and the vacuum box.

[0008] Preferably, the side pressing mechanism includes a fixing plate fixedly installed on the side wall of the vacuum box. Two pressure accumulating rods are arranged through the fixing plate and are slidably connected to the fixing plate. The bottoms of the two pressure accumulating rods are fixedly installed with the same side pressing plate. A first spring is fixedly connected between the side pressing plate and the fixing plate. Two mounting blocks are fixedly installed on the top of the vacuum box. The same rotating shaft rotatably connected to the two mounting blocks is arranged through the two mounting blocks. A one-way bearing is arranged on the outer wall of the rotating shaft between the two mounting blocks. The outer ring of the one-way bearing is fixedly installed with a gear. Circular blocks are fixedly installed at both ends of the rotating shaft. A first rotating rod is rotatably connected to the side wall away from the gear of each of the two circular blocks. A second rotating rod located above the fixing plate is rotatably connected to the side wall close to the vacuum box of each of the two pressure accumulating rods. A rack meshed with the gear is fixedly installed at the bottom of the upper plate.

[0009] Preferably, the air extraction mechanism includes a connecting rod arranged through the upper plate and slidably connected to the upper plate. One end of the connecting rod is fixedly connected to the top of the vacuum box. The other end of the connecting rod is fixedly installed with a connecting plate. Two air extraction boxes are fixedly installed on the top of the upper plate. Air extraction rods slidably connected to the two air extraction boxes are arranged through the tops of the two air extraction boxes. One ends of the two air extraction rods are fixedly installed with piston blocks. The two piston blocks are respectively slidably connected to the inner walls of the two air extraction boxes. The other ends of the two air extraction rods are fixedly connected to the bottom of the connecting plate. An air inlet pipe and an air outlet pipe communicating with the inside of each of the two air extraction boxes are arranged on each of the two air extraction boxes.

[0010] Preferably, sealing rings are arranged at the through parts of the two sliding rods and the vacuum box.

[0011] Preferably, the rotating shaft is fixedly connected to the inner ring of the one-way bearing, and the two second rotating rods are respectively located on the sides of the two circular blocks away from the gear.

[0012] Preferably, the ends of the air outlet pipe and the air inlet pipe communicating with the corresponding air extraction box are both located below the piston block. Check valves are arranged in both the air outlet pipe and the air inlet pipe. One ends of the two air inlet pipes penetrate through the top of the vacuum box.

[0013] The beneficial effects of the present invention: By setting up a compacting mechanism, the vacuum box can be tightly pressed against the diaper during the extension of the telescopic end of the second hydraulic cylinder, thereby forming a temporary sealing layer, which effectively blocks the penetration of external air through the gaps between the non-woven fabric fibers of the diaper, and after the vacuum box is tightly pressed against the diaper, the main pressure plate inside it moves downward to automatically compact the filling core.

[0014] By setting up a side pressure mechanism, the round block can be rotated in one direction during the extension of the telescopic end of the second hydraulic cylinder, so that the first rotating rod can first contact and then separate from the second rotating rod, and the elastic force generated by the compression of the first spring can cause the side pressure plate to move downward quickly to compact the two side parts of the filling core.

[0015] By setting up an exhaust mechanism, the interior of the vacuum box can be automatically evacuated when the main pressure plate moves downward to compact the filling core part, so that the filling core of the diaper can be better compressed, greatly improving the compaction effect and product quality.

[0016] The present invention improves the compaction effect and product quality of the diaper filling core through the compaction mechanism, the side pressure mechanism and the exhaust mechanism, and can make the vacuum box and the diaper tightly contact to form a temporary sealing layer to block the penetration of external air. Then the main pressure plate moves downward to automatically compact the filling core. At the same time, the side pressure plate can use the elastic force of the first spring to quickly compact the two sides of the filling core downward and automatically evacuate the inside of the vacuum box to better compress the filling core and enhance the compaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the planar structure of a biomedical diaper proposed by the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a biomedical diaper preparation device proposed by the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of a biomedical diaper preparation device proposed by the present invention after being cut open; Figure 4 The present invention is attached Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a three-dimensional structural schematic diagram of the compaction mechanism, the side pressure mechanism and the air extraction mechanism in a top view of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the compacting mechanism, the side pressure mechanism and the air extraction mechanism of the present invention when viewed from above.

[0018] In the figure: 1 diaper main body, 2 leak-proof side edges, 3 filling core, 4 waistband, 5 magic tape, 6 first hydraulic cylinder, 7 guide plate, 8 conveyor belt, 9 top plate, 10 baffle plate, 11 force-bearing plate, 12 second hydraulic cylinder, 13 connecting plate, 14 side pressing plate, 15 air extraction box, 16 air extraction rod, 17 piston block, 18 connecting rod, 19 air outlet pipe, 20 upper plate, 21 round block, 22 pressure accumulation rod, 23 first spring, 24 fixing plate, 25 vacuum box, 26 mounting block, 27 one-way bearing, 28 gear, 29 main pressing plate, 30 rack, 31 second spring, 32 sliding rod, 33 rotating shaft, 34 air inlet pipe, 35 first rotating rod, 36 second rotating rod, 37 frame body, 38 sealing ring. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Refer to Figure 1 , a biomedical diaper and its preparation device, including a diaper main body 1, a filling core 3 is arranged in the diaper main body 1, waistbands 4 are arranged at the four corners of the diaper main body 1, magic tapes 5 are arranged on the four waistbands 4, leak-proof side edges 2 are arranged on both sides of the diaper main body 1, and the core layer of its filling core 3 adopts sodium alginate / sodium carboxymethylcellulose composite hydrogel, loaded with 0.5% tea polyphenol microcapsules, and slowly releases anti-inflammatory components when encountering body fluids.

[0021] Refer to Figures 2 - 6, a preparation device for a biomedical diaper, comprising a frame body 37. A top plate 9 is fixedly installed between the inner walls on both sides of the frame body 37. Two baffles 10 are fixedly installed at the bottom of the top plate 9. A conveyor belt 8 is arranged below the top plate 9, and the conveyor belt 8 is responsible for conveying the diaper to be compacted to a designated position. First hydraulic cylinders 6 are fixedly installed on the inner walls on both sides of the frame body 37. Guide plates 7 located above the conveyor belt 8 are fixedly connected to the telescopic ends of the two first hydraulic cylinders 6. A stress plate 11 is fixedly installed between the inner walls on both sides of the frame body 37. The stress plate 11 penetrates through the middle of the conveyor belt 8, and the upper side of the stress plate 11 is in contact with the inner side of the conveyor belt 8. A compaction mechanism is arranged between the two baffles 10. The compaction mechanism includes two second hydraulic cylinders 12 fixedly installed at the bottom of the top plate 9. The telescopic ends of the two second hydraulic cylinders 12 are fixedly connected to the same upper plate 20. A vacuum box 25 is arranged below the upper plate 20. The vacuum box 25 is in close contact with the diaper during the compaction process to form a temporary sealing layer, effectively blocking the penetration of external air and providing a necessary environment for subsequent vacuum pumping and compaction operations. Two sliding rods 32 slidably connected to the vacuum box 25 penetrate through the top of the vacuum box 25. One end of each of the two sliding rods 32 is fixedly connected to the bottom of the upper plate 20, and the other ends of the two sliding rods 32 are fixedly installed with the same main pressing plate 29 located inside the vacuum box 25. A second spring 31 is fixedly connected between the upper plate 20 and the vacuum box 25. Sealing rings 38 are arranged at the penetration positions of the two sliding rods 32 and the vacuum box 25. The sealing rings 38 are realized by fluororubber O-rings for static main sealing. The fluororubber O-rings have good oil resistance, high temperature resistance and chemical corrosion resistance, can effectively prevent gas leakage, and ensure the vacuum degree inside the vacuum box 25. Combined with the surface treatment of the sliding rods 32 with hard chromium plating and DLC coating, supplemented by micro-lubrication with perfluoropolyether oil, the perfluoropolyether oil has excellent lubrication performance and chemical stability, can form a lubricating film between the sliding rods 32 and the sealing rings 38, reduce the frictional resistance, improve the sealing effect, and prevent sealing failure caused by insufficient lubrication, forming a triple sealing system of airtightness, dust prevention and wear resistance.

[0022] There are two sets of side pressing mechanisms symmetrically arranged on the compaction mechanism. The side pressing mechanism includes a fixing plate 24 fixedly installed on the side wall of the vacuum box 25. Two pressure storage rods 22 that penetrate through the fixing plate 24 and are slidably connected to it are provided. The bottoms of the two pressure storage rods 22 are fixedly installed with the same side pressing plate 14. A first spring 23 is fixedly connected between the side pressing plate 14 and the fixing plate 24. Two mounting blocks 26 are fixedly installed on the top of the vacuum box 25. A rotating shaft 33 that penetrates through the two mounting blocks 26 and is rotatably connected to both of them is provided. A one-way bearing 27 is provided on the outer wall of the rotating shaft 33 between the two mounting blocks 26. The one-way bearing 27 enables the rotating shaft 33 to rotate freely in a specific direction and be locked in the opposite direction, thus realizing the one-way driving function of the gear 28. The outer ring of the one-way bearing 27 is fixedly installed with the gear 28. Circular blocks 21 are fixedly installed at both ends of the rotating shaft 33. A first rotating rod 35 is rotatably connected to the side wall of each of the two circular blocks 21 away from the gear 28. A second rotating rod 36 located above the fixing plate 24 is rotatably connected to the side wall of each of the two pressure storage rods 22 close to the vacuum box 25. The first rotating rod 35 and the second rotating rod 36 contact and separate during the rotation process, realizing the rapid downward movement of the side pressing plate 14 and the compaction operation on both sides of the filling core. A rack 30 meshing with the gear 28 is fixedly installed at the bottom of the upper plate 20. The rotating shaft 33 is fixedly connected to the inner ring of the one-way bearing 27. The two second rotating rods 36 are respectively located on the side of the two circular blocks 21 away from the gear 28.

[0023] A gas extraction mechanism is provided on the compaction mechanism. The gas extraction mechanism includes a connecting rod 18 that penetrates through the upper plate 20 and is in circular sliding connection. One end of the connecting rod 18 is fixedly connected to the top of the vacuum box 25. The other end of the connecting rod 18 is fixedly installed with a connecting plate 13. Two gas extraction boxes 15 are fixedly installed on the top of the upper plate 20. A gas extraction rod 16 that penetrates through the top of each of the two gas extraction boxes 15 and is slidably connected to it is provided. One end of each of the two gas extraction rods 16 is fixedly installed with a piston block 17. The piston block 17 slides up and down in the gas extraction box 15 under the drive of the gas extraction rod 16, thus realizing the vacuum pumping operation inside the vacuum box 25. The two piston blocks 17 are respectively slidably connected to the inner walls of the two gas extraction boxes 15. The other ends of the two gas extraction rods 16 are fixedly connected to the bottom of the connecting plate 13. An air inlet pipe 34 and an air outlet pipe 19 that are connected to the inside of each of the two gas extraction boxes 15 are provided on each of the two gas extraction boxes 15. The air inlet pipe 34 is used to suck the air inside the vacuum box 25 into the gas extraction box 15, while the air outlet pipe 19 is used to discharge the air inside the gas extraction box 15 to the external environment. The ends of the air outlet pipe 19 and the air inlet pipe 34 connected to the corresponding gas extraction box 15 are both located below the piston block 17. Check valves are provided in both the air outlet pipe 19 and the air inlet pipe 34. The check valves ensure that the air can only flow in one direction, preventing the air from flowing back and affecting the vacuum pumping effect. One end of each of the two air inlet pipes 34 penetrates through the top of the vacuum box 25.

[0024] When the present invention is in use, in the initial state, the first rotating rod 35 is located below the second rotating rod 36 and is in contact with the second rotating rod 36. The first spring 23 is in a compressed state. Since the openings of the two oppositely inclined guide plates 7 become smaller, the non-aligned diapers on the conveyor belt 8 can be guided successively to directly below the vacuum box 25. When the diaper is conveyed to directly below the vacuum box 25, the second hydraulic cylinder 12 is started to move the upper plate 20 and the vacuum box 25 downward synchronously until the vacuum box 25 contacts the diaper. Subsequently, the second hydraulic cylinder 12 makes the upper plate 20 continue to move downward, and the second spring 31 is compressed. Through the elastic force generated by the compression of the second spring 31, the vacuum box 25 can be tightly pressed against the diaper. During the process of the upper plate 20 continuing to move downward, by providing the sliding rod 32, the main pressing plate 29 can be moved downward, so that the filling core 3 can be compacted. During the process of the main pressing plate 29 moving downward, by providing the connecting rod 18 and the connecting plate 13, the air extraction box 15 can be moved downward relative to the connecting plate 13. By providing two air extraction rods 16, the piston block 17 can slide upward in the air extraction box 15, so as to generate an air extraction effect, and then evacuate the vacuum box 25. In this way, the filling core 3 of the diaper can be better compressed, greatly improving the compaction effect and the product quality. At the penetration of the sliding rod 32 and the vacuum box 25, a fluororubber O-ring is used to achieve static main sealing. Combined with the surface treatment of the rod body with hard chromium plating and DLC coating, and supplemented by the micro-lubrication of perfluoropolyether oil, a triple sealing system of airtightness, dust prevention and wear resistance is formed; During the process of the upper plate 20 moving downward, the rack 30 moves downward accordingly. Through the meshing connection between the rack 30 and the gear 28, the gear 28 can be rotated in one direction for an integer number of turns (attached Figure 4 state). At this time, the inner ring and the outer ring of the one-way bearing 27 are locked, and then the rotating shaft 33 and the round block 21 can be rotated in one direction accordingly. When the round block 21 rotates in one direction (attached Figure 5 in which the left round block 21 rotates clockwise and the right round block 21 rotates counterclockwise), the first rotating rod 35 will rotate in one direction around the axis of the rotating shaft 33. The rotating first rotating rod 35 makes the second rotating rod 36 move upward and separate from each other and finally return to the initial position. In this way, when the second rotating rod 36 moves upward, the pressure accumulator rod 22 and the side pressing plate 14 move upward, and the first spring 23 is continuously compressed. When the first rotating rod 35 is separated from the second rotating rod 36, the elastic force generated by the compression of the first spring 23 can make the side pressing plate 14 move downward quickly to forcibly compact the edge of the filling core 3, so that the high molecular water-absorbing resin particles and the non-woven fabric fibers form a dense cross-linked structure. In this way, it reciprocates; When the upper plate 20 moves upward by the second hydraulic cylinder 12, the sliding rod 32 and the main pressing plate 29 move upward until the main pressing plate 29 abuts against the inner top of the vacuum box 25. At this time, the second spring 31 returns to its original length. During this process, the upward moving upper plate 20 makes the air extraction box 15 gradually approach the connecting plate 13, so that the gas sucked into the air extraction box 15 is discharged through the air outlet pipe 19 for the next air extraction. The upward moving upper plate 20 also drives the rack 30 to move upward. Through the meshing connection between the rack 30 and the gear 28, the gear 28 can be rotated in the other direction. At this time, the inner ring and the outer ring of the one-way bearing 27 rotate idly, and the rotating shaft 33 and the round block 21 do not rotate. Subsequently, as the upper plate 20 continues to move upward, the vacuum box 25 will move upward accordingly, so that the vacuum box 25 is away from the diaper, thus realizing the compaction of the filling core 3 in the diaper.

[0025] As described above, only the preferred specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A biomedical diaper, comprising a diaper main body (1), characterized in that, A filling core body (3) is arranged inside the diaper main body (1). Waistbands (4) are arranged at the four corners of the diaper main body (1). Magic tapes (5) are arranged on the four waistbands (4). Leakage-proof side edges (2) are arranged on both sides of the diaper main body (1).

2. A preparation device for the biomedical diaper described in claim 1, comprising a frame body (37), characterized in that, A top plate (9) is fixedly installed between the inner walls on both sides of the frame body (37). Two baffles (10) are fixedly installed at the bottom of the top plate (9). A conveyor belt (8) is arranged below the top plate (9). First hydraulic cylinders (6) are fixedly installed on the inner walls on both sides of the frame body (37). Guide plates (7) located above the conveyor belt (8) are fixedly connected to the telescopic ends of the two first hydraulic cylinders (6). A stress plate (11) is fixedly installed between the inner walls on both sides of the frame body (37). The stress plate (11) penetrates through the middle of the conveyor belt (8). The upper side of the stress plate (11) is attached to the inner side of the conveyor belt (8). A compaction mechanism is arranged between the two baffles (10). Two groups of symmetrically arranged side pressure mechanisms are arranged on the compaction mechanism. An air extraction mechanism is arranged on the compaction mechanism.

3. The preparation device of a biomedical diaper according to claim 2, wherein, The compaction mechanism includes two second hydraulic cylinders (12) fixedly installed at the bottom of the top plate (9). The telescopic ends of the two second hydraulic cylinders (12) are fixedly connected to the same upper plate (20). A vacuum box (25) is arranged below the upper plate (20). Two sliding rods (32) slidably connected to the vacuum box (25) penetrate through the top of the vacuum box (25). One ends of the two sliding rods (32) are fixedly connected to the bottom of the upper plate (20). The other ends of the two sliding rods (32) are fixedly installed with the same main pressure plate (29) located inside the vacuum box (25). A second spring (31) is fixedly connected between the upper plate (20) and the vacuum box (25).

4. The preparation device of a biomedical diaper according to claim 3, characterized in that, The side pressing mechanism includes a fixed plate (24) fixedly installed on the side wall of the vacuum box (25). Two pressure storage rods (22) slidably connected to the fixed plate (24) are arranged through the fixed plate (24). The same side pressing plate (14) is fixedly installed at the bottoms of the two pressure storage rods (22). A first spring (23) is fixedly connected between the side pressing plate (14) and the fixed plate (24). Two mounting blocks (26) are fixedly installed at the top of the vacuum box (25). A same rotating shaft (33) rotatably connected to both of the two mounting blocks (26) is arranged through the two mounting blocks (26). A one-way bearing (27) located between the two mounting blocks (26) is arranged on the outer wall of the rotating shaft (33). A gear (28) is fixedly installed on the outer ring of the one-way bearing (27). Circular blocks (21) are fixedly installed at both ends of the rotating shaft (33). A first rotating rod (35) is rotatably connected to the side wall of each of the two circular blocks (21) away from the gear (28). A second rotating rod (36) located above the fixed plate (24) is rotatably connected to the side wall of each of the two pressure storage rods (22) close to the vacuum box (25). A rack (30) meshed with the gear (28) is fixedly installed at the bottom of the upper plate (20).

5. The preparation device of a biomedical diaper according to claim 4, characterized in that, The air extraction mechanism includes a connecting rod (18) arranged through the upper plate (20) and in circular sliding connection. One end of the connecting rod (18) is fixedly connected to the top of the vacuum box (25). A connecting plate (13) is fixedly installed at the other end of the connecting rod (18). Two air extraction boxes (15) are fixedly installed at the top of the upper plate (20). Air extraction rods (16) slidably connected to the two air extraction boxes (15) are arranged through the tops of the two air extraction boxes (15). A piston block (17) is fixedly installed at one end of each of the two air extraction rods (16). The two piston blocks (17) are respectively slidably connected to the inner walls of the two air extraction boxes (15). The other ends of the two air extraction rods (16) are fixedly connected to the bottom of the connecting plate (13). An air inlet pipe (34) and an air outlet pipe (19) communicating with the inside thereof are arranged on each of the two air extraction boxes (15).

6. The preparation device of a biomedical diaper according to claim 3, characterized in that, Sealing rings (38) are arranged at the through parts of the two sliding rods (32) and the vacuum box (25).

7. The preparation device of a biomedical diaper according to claim 4, characterized in that, The rotating shaft (33) is fixedly connected to the inner ring of the one-way bearing (27). The two second rotating rods (36) are respectively located on the sides of the two circular blocks (21) away from the gear (28).

8. The preparation device of a biomedical diaper according to claim 5, characterized in that, One ends of the air outlet pipe (19) and the air inlet pipe (34) communicating with the corresponding air extraction box (15) are both located below the piston block (17). Check valves are arranged in both the air outlet pipe (19) and the air inlet pipe (34). One ends of the two air inlet pipes (34) penetrate through the top of the vacuum box (25).

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