A multi-axis release paper coater

Abstract

This application relates to the field of coating machine technology and discloses a multi-axis release paper coating machine, including a base plate and a mounting frame. Two retainers are fixedly installed on the upper surface of the base plate, and a motor is fixedly connected to the back of one of the retainers. This multi-axis release paper coating machine, by setting up coating shaft one, coating shaft two, and coating shaft three, places coating shaft two between coating shaft one and coating shaft three, with an included angle of 15 degrees between coating shaft two and coating shaft one. Starting the motor causes coating shaft one to rotate. Through the connection of pulley one and synchronous belt one, coating shaft one, coating shaft two, and coating shaft three rotate synchronously. The substrate sequentially passes around coating shaft one, coating shaft two, and coating shaft three to form an S-shaped path. The inclined coating shaft two can generate a lateral flattening force, achieving secondary homogenization through inter-axis transfer. This device enables multi-axis operation, reduces the coating defect rate of high-viscosity coating liquid, and improves coating uniformity.

Description

Technical Field

[0001] This application relates to the field of coating machine technology, specifically a multi-axis release paper coating machine. Background Technology

[0002] A release paper coating machine is a specialized device for manufacturing release paper. It imparts non-stick properties to the paper by uniformly coating a special release coating onto the paper surface. This coating is typically made of high molecular polymers or silicone-based materials, exhibiting low adhesion and good thermal stability. The working principle of a release paper coating machine involves coating rollers or other coating devices transferring the coating onto the paper, followed by drying and curing to ultimately form a non-stick coating. Release paper coating technology is widely used in labels, tapes, medical supplies, and other fields.

[0003] However, it has been found that in existing release paper coating machines, the traditional coating shaft layout is simple and cannot take into account the process adaptability of coating liquids with different viscosities, resulting in an increased coating defect rate for high-viscosity coating liquids and reduced coating uniformity. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a multi-axis release paper coating machine, which has the advantages of being able to operate through multiple axes, reducing the coating defect rate of high-viscosity coating liquids, and improving coating uniformity. It solves the problem that traditional coating machines have a single coating axis layout, which cannot take into account the process adaptability of coating liquids of different viscosities, resulting in an increased coating defect rate of high-viscosity coating liquids and reduced coating uniformity.

[0005] To achieve the above objectives, this application provides the following technical solution: a multi-axis release paper coating machine, comprising a base plate and a mounting frame. Two retainers are fixedly mounted on the upper surface of the base plate. A motor is fixedly connected to the back of one of the retainers. A coating shaft 1 is fixedly connected to the output shaft of the motor. A coating shaft 2 and a coating shaft 3 are provided below the coating shaft 1. The outer surfaces of the coating shaft 1, coating shaft 2, and coating shaft 3 are rotatably connected to the inner walls of the corresponding retainers. Two synchronous belts 1 are provided above the base plate. Two pulleys 1 mesh with the inner walls of each synchronous belt 1. The inner walls of each pulley 1 are fixedly connected to the outer surfaces of the corresponding coating shafts 1, 2, and 3. The upper surface of each retainer is fixedly connected to the bottom surface of the mounting frame.

[0006] To reduce the coating defect rate and improve coating uniformity of the high-viscosity coating liquid using the above scheme, two retainers are installed on the upper surface of the base plate. A motor is positioned on the back of one of the retainers, and coating shaft one is connected to the motor. Coating shaft two and coating shaft three are located below coating shaft one. Coating shaft one, coating shaft two, and coating shaft three are connected to the retainers and configured to rotate, thus limiting the movement of coating shaft one, coating shaft two, and coating shaft three. Coating shaft one and coating shaft three are arranged parallel vertically, with coating shaft two located between coating shaft one and coating shaft three, and coating shaft two is positioned relative to coating shaft one. The included angle between the two is degrees. A synchronous belt is set to connect to a pulley, and the pulley is connected to the corresponding coating shafts one, two, and three. When the motor rotates, the coating shaft rotates, and then through the connection between the pulley and the synchronous belt, the coating shafts one, two, and three rotate synchronously. The substrate passes around the coating shafts one, two, and three in sequence to form an S-shaped path. The inclined coating shaft two can generate a lateral flattening force. Secondary homogenization is achieved through inter-shaft transfer. This device can operate through multiple shafts and reduce the coating defect rate of high-viscosity coating liquid, thereby improving coating uniformity.

[0007] Furthermore, a liquid storage tank is fixedly installed on the upper surface of the mounting frame, and an infusion pump is fixedly installed on the outer surface of the liquid storage tank through a pipe. The bottom surface of the infusion pump is fixedly installed on the upper surface of the mounting frame.

[0008] The above solution involves placing the liquid storage tank on the upper surface of the mounting frame to provide support. The infusion pump is connected to the liquid storage tank via a pipeline, allowing the pump to extract the coating liquid from inside the tank. The bottom surface of the infusion pump is connected to the upper surface of the mounting frame, ensuring stable operation of the pump.

[0009] Furthermore, a hose is fixedly installed at the output end of the infusion pump, and a stainless steel pipe is fixedly connected to the other end of the hose. A coating head is fixedly installed at the bottom end of the stainless steel pipe, and sliding blocks are fixedly connected to both the front and back of the coating head.

[0010] The above solution involves installing a hose at the output end of the infusion pump and connecting a stainless steel tube to the hose to transfer the coating liquid. The coating head is installed at the bottom end of the stainless steel tube, through which the coating liquid can be squeezed out to achieve the coating operation. When the coating head floats up and down, the design of the hose allows for adjustment of the up and down floating of the coating head.

[0011] Furthermore, each of the retainers has a mounting block fixedly connected to its upper surface, and each mounting block has a sliding groove on its outer surface. The inner wall of each sliding groove is slidably connected to the outer surface of the corresponding sliding block. Each mounting block has a threaded rod rotatably connected to its inner wall, and the outer surface of each threaded rod is threadedly connected to the inner wall of the corresponding sliding block.

[0012] The above scheme involves setting an installation block on the upper surface of the corresponding retainer and creating a sliding groove. The sliding block is then connected to the coating head, and the sliding block is also connected to the corresponding sliding groove to limit the lifting and lowering of the coating head. A threaded rod is installed on the inner wall of the corresponding installation block and configured as a rotary connection to limit the lifting and lowering of the threaded rod. The threaded rod is then connected to the sliding block and configured as a threaded connection. By rotating the threaded rod, the sliding block can be lifted and lowered, thereby allowing the coating head to be lifted and lowered.

[0013] Furthermore, each of the threaded rods is fixedly connected to a pulley two on its outer surface, and a timing belt two is provided on the left side of the mounting bracket, with each pulley two meshing with the timing belt two.

[0014] With the above scheme, pulley two is set on the surface of the threaded rod and fixedly connected. Synchronous belt two is set on the left side of the mounting frame and connected to pulley two. Through the connection between synchronous belt two and pulley two, the two threaded rods can rotate synchronously and in the same direction, ensuring the synchronicity of the sliding block when it rises and falls.

[0015] Furthermore, a first conveyor roller and a second conveyor roller are provided below the mounting frame. Two mounting seats are rotatably connected to the outer surface of the first conveyor roller, and a tension sensor is fixedly installed on the bottom surface of each mounting seat.

[0016] With the above scheme, conveyor roller one and conveyor roller two are set below the mounting frame, and the mounting base is set on the surface of conveyor roller one, which is set as a rotatable connection. A tension sensor is set on the bottom surface of the corresponding mounting base. Through the connection between the tension sensor and the mounting base and conveyor roller one, the tension of the substrate can be detected in real time.

[0017] Furthermore, a crossbeam is fixedly connected between the two retainers, the bottom surface of each tension sensor is fixedly connected to the upper surface of the crossbeam, and two columns are fixedly connected to the bottom surface of the crossbeam, with the bottom end of each column fixedly connected to the upper surface of the base plate.

[0018] The above scheme involves installing the crossbeam between two cages, connecting the tension sensor to the crossbeam, and supporting the tension sensor through the crossbeam. A column is placed on the bottom surface of the crossbeam, and the bottom end of the column is connected to the base plate to install the column, thereby supporting the crossbeam.

[0019] Furthermore, each of the columns has a limiting groove on its outer surface, a limiting block is slidably connected to the inner wall of each limiting groove, the inner wall of each limiting block is rotatably connected to the outer surface of the second conveying roller, a telescopic rod is fixedly connected to the inner bottom wall of each limiting groove, and the output end of each telescopic rod is fixedly connected to the bottom surface of the corresponding limiting block.

[0020] The above scheme involves creating a limiting groove on the surface of the column to achieve positioning of the limiting groove. A limiting block is installed on the inner wall of the limiting groove, configured as a sliding connection, and connected to the second conveyor roller. The limiting groove limits the positioning of the limiting block and the second conveyor roller. A telescopic rod is installed on the inner bottom wall of the corresponding limiting groove, and the output end of the telescopic rod is connected to the corresponding limiting block. The tension of the substrate is detected by a tension sensor. When tension fluctuations occur, the telescopic rod is activated to move the second conveyor roller, thereby compensating for tension fluctuations.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This multi-axis release paper coating machine consists of three components: coating shaft 1, coating shaft 2, and coating shaft 3. Coating shaft 2 is positioned between coating shaft 1 and coating shaft 3, with an angle of 15 degrees between them. When the motor is started, coating shaft 1 rotates. Through the connection of pulley 1 and synchronous belt 1, coating shafts 1, 2, and 3 rotate synchronously. The substrate sequentially passes around coating shafts 1, 2, and 3, forming an S-shaped path. The inclined coating shaft 2 generates a lateral flattening force, achieving secondary homogenization through inter-shaft transfer. This device enables multi-axis operation, reduces the coating defect rate of high-viscosity coating liquid, and improves coating uniformity. A tension sensor monitors the substrate tension in real time. When tension fluctuations occur, a telescopic rod is activated, causing a limit block to move conveyor roller 2, thereby compensating for tension fluctuations. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0024] Figure 2 This is the overall main view structure diagram of this application;

[0025] Figure 3 This is a structural diagram showing the connection relationship between the cage and the motor in this application;

[0026] Figure 4 This is a structural diagram showing the connection relationship between the sliding block and the threaded rod in this application;

[0027] Figure 5 This is a structural diagram showing the connection relationship between the limiting groove and the limiting block in this application.

[0028] In the picture:

[0029] 1. Base plate; 2. Cage; 3. Motor; 4. Coating shaft one; 5. Coating shaft two; 6. Coating shaft three; 7. Synchronous belt one; 8. Pulley one; 9. Mounting bracket; 10. Storage tank; 11. Infusion pump; 12. Hoses; 13. Stainless steel pipe; 14. Coating head; 15. Sliding block; 16. Mounting block; 17. Sliding groove; 18. Threaded rod; 19. Pulley two; 20. Synchronous belt two; 21. Conveyor roller one; 22. Mounting base; 23. Tension sensor; 24. Crossbeam; 25. Conveyor roller two; 26. Column; 27. Limiting groove; 28. Limiting block; 29. ​​Telescopic rod. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Please see Figure 2 , Figure 3 and Figure 5 This embodiment of a multi-axis release paper coating machine includes a base plate 1 and a mounting frame 9. Two retainers 2 are fixedly mounted on the upper surface of the base plate 1. A motor 3 is fixedly connected to the back of one of the retainers 2. The output shaft of the motor 3 is fixedly connected to a coating shaft 4. Coating shafts 5 and 6 are provided below the coating shaft 4. The outer surfaces of the coating shafts 4, 5, and 6 are rotatably connected to the inner walls of the corresponding retainers 2. Two synchronous belts 7 are provided above the base plate 1. The inner walls of each synchronous belt 7 are engaged with two pulleys 8. The inner walls of each pulley 8 are fixedly connected to the outer surfaces of the corresponding coating shafts 4, 5, and 6. The upper surface of each retainer 2 is fixedly connected to the bottom surface of the mounting frame 9.

[0032] Please see Figure 1 , Figure 2 and Figure 4 A liquid storage tank 10 is fixedly installed on the upper surface of the mounting frame 9. An infusion pump 11 is fixedly installed on the outer surface of the liquid storage tank 10 through a pipe. The bottom surface of the infusion pump 11 is fixedly installed on the upper surface of the mounting frame 9. The liquid storage tank 10 is placed on the upper surface of the mounting frame 9 to support the liquid storage tank 10. The infusion pump 11 is connected to the liquid storage tank 10 through a pipe. The infusion pump 11 can extract the coating liquid inside the liquid storage tank 10. The bottom surface of the infusion pump 11 is connected to the upper surface of the mounting frame 9 so that the infusion pump 11 can work stably.

[0033] Please see Figure 1 , Figure 3 and Figure 4 A hose 12 is fixedly installed at the output end of the infusion pump 11. The other end of the hose 12 is fixedly connected to a stainless steel tube 13. A coating head 14 is fixedly installed at the bottom end of the stainless steel tube 13. Sliding blocks 15 are fixedly connected to both the front and back of the coating head 14. The hose 12 is installed at the output end of the infusion pump 11, and the stainless steel tube 13 is connected to the hose 12 to realize the transmission of coating liquid. The coating head 14 is installed at the bottom end of the stainless steel tube 13. The coating liquid can be squeezed out through the coating head 14 to realize the coating work. When the coating head 14 floats up and down, the design of the hose 12 allows the coating head 14 to float up and down for adjustment.

[0034] Please see Figure 3 and Figure 4 Each retainer 2 has a mounting block 16 fixedly connected to its upper surface. Each mounting block 16 has a sliding groove 17 on its outer surface. The inner wall of each sliding groove 17 is slidably connected to the outer surface of the corresponding sliding block 15. Each mounting block 16 has a threaded rod 18 rotatably connected to its inner wall. The outer surface of each threaded rod 18 is threadedly connected to the inner wall of the corresponding sliding block 15. The mounting block 16 is set on the upper surface of the corresponding retainer 2 and has a sliding groove 17. The sliding block 15 is connected to the coating head 14 and the sliding block 15 is connected to the corresponding sliding groove 17 to limit the lifting and lowering of the coating head 14. The threaded rod 18 is installed on the inner wall of the corresponding mounting block 16 and is set as a rotatable connection to limit the lifting and lowering of the threaded rod 18. The threaded rod 18 is connected to the sliding block 15 and is set as a threaded connection. By rotating the threaded rod 18, the sliding block 15 can be lifted and lowered, thereby allowing the coating head 14 to be lifted and lowered.

[0035] Please see Figure 4 Each threaded rod 18 has a pulley 19 fixedly connected to its outer surface. A timing belt 20 is provided on the left side of the mounting frame 9. Each pulley 19 meshes with the timing belt 20. The pulleys 19 are fixedly connected to the surface of the threaded rod 18. The timing belt 20 is located on the left side of the mounting frame 9 and connected to the pulleys 19. Through the connection between the timing belt 20 and the pulleys 19, the two threaded rods 18 can rotate synchronously in the same direction, ensuring the synchronicity of the sliding block 15 when it rises and falls.

[0036] Please see Figure 2 and Figure 5Below the mounting frame 9 are a first conveyor roller 21 and a second conveyor roller 25. The outer surface of the first conveyor roller 21 is rotatably connected to two mounting seats 22. Each mounting seat 22 has a tension sensor 23 fixedly installed on its bottom surface. The first conveyor roller 21 and the second conveyor roller 25 are arranged below the mounting frame 9. The mounting seats 22 are set on the surface of the first conveyor roller 21 and are rotatably connected. The tension sensor 23 is set on the bottom surface of the corresponding mounting seat 22. Through the connection between the tension sensor 23 and the mounting seat 22 and the first conveyor roller 21, the tension of the substrate can be detected in real time.

[0037] Please see Figure 5 A crossbeam 24 is fixedly connected between two retainers 2. The bottom surface of each tension sensor 23 is fixedly connected to the upper surface of the crossbeam 24. Two columns 26 are fixedly connected to the bottom surface of the crossbeam 24. The bottom end of each column 26 is fixedly connected to the upper surface of the base plate 1. The crossbeam 24 is installed between the two retainers 2 to realize the installation of the crossbeam 24. The tension sensor 23 is connected to the crossbeam 24, and the crossbeam 24 supports the tension sensor 23. The columns 26 are set on the bottom surface of the crossbeam 24, and the bottom end of the columns 26 is connected to the base plate 1 to realize the installation of the columns 26, thereby enabling the crossbeam 24 to be supported by the columns 26.

[0038] Please see Figure 5 Each column 26 has a limiting groove 27 on its outer surface. A limiting block 28 is slidably connected to the inner wall of each limiting groove 27. The inner wall of each limiting block 28 is rotatably connected to the outer surface of the conveyor roller 25. A telescopic rod 29 is fixedly connected to the inner bottom wall of each limiting groove 27. The output end of each telescopic rod 29 is fixedly connected to the bottom surface of the corresponding limiting block 28. The limiting groove 27 is positioned on the surface of the column 26, and the limiting block 28 is installed on the limiting groove 27. The inner wall of the groove 27 is configured to slide, and the limiting block 28 is connected to the second conveyor roller 25. The limiting groove 27 is used to limit the limiting block 28 and the second conveyor roller 25. The telescopic rod 29 is set on the inner bottom wall of the corresponding limiting groove 27, and the output end of the telescopic rod 29 is connected to the corresponding limiting block 28. The tension of the substrate is detected by the tension sensor 23. When the tension fluctuates, the telescopic rod 29 is activated to move the second conveyor roller 25, thereby compensating for the tension fluctuation.

[0039] This embodiment of a multi-axis release paper coating machine includes components such as coating shaft 4, coating shaft 5, and coating shaft 6. Coating shaft 25 is positioned between coating shaft 4 and coating shaft 6, with an angle of 15 degrees between them. When motor 3 is started, coating shaft 4 rotates. Through the connection between pulley 8 and synchronous belt 7, coating shaft 4, coating shaft 25, and coating shaft 6 rotate synchronously. The substrate sequentially passes around coating shaft 4, coating shaft 25, and coating shaft 6 to form an S-shaped path. The inclined coating shaft 25 generates a lateral flattening force, achieving secondary homogenization through inter-axis transfer. This allows the device to operate on multiple axes, reducing the coating defect rate of high-viscosity coating liquid and improving coating uniformity. Tension sensor 23 detects the substrate tension in real time. When tension fluctuates, telescopic rod 29 is activated, causing limit block 28 to move conveyor roller 25, thereby compensating for tension fluctuations.

[0040] It should be noted that the infusion pump 11 is a gear pump to supply the coating liquid, the tension sensor 23 is a strain gauge tension sensor that can detect the tension of the substrate in real time, the surface of the conveying roller 25 is covered with a polyurethane layer, and the telescopic rod 29 is an electric telescopic rod.

[0041] The working principle of the above embodiments is as follows:

[0042] During the coating operation, the motor 3 is started, causing the coating shaft 4 to rotate. Through the connection between the pulley 8 and the synchronous belt 7, the coating shafts 4, 5, and 6 rotate synchronously. The substrate sequentially passes around the coating shafts 4, 5, and 6, forming an S-shaped path. Then, the infusion pump 11 is started, allowing the coating liquid inside the storage tank 10 to enter the coating head 14 through the hose 12 and stainless steel pipe 13 for coating. The inclined coating shaft 5 generates a lateral leveling force, achieving secondary homogenization through inter-axis transfer. This allows the device to operate on multiple shafts, and enables… The coating defect rate of high-viscosity coating liquid is reduced, and the coating uniformity is improved. When the coating layer is insufficient or excessively thick, rotating the threaded rod 18 connects the pulley 19 to the synchronous belt 20, thereby causing the two threaded rods 18 to rotate and drive the sliding block 15 to rise and fall inside the sliding groove 17. This allows the coating head 14 to rise and fall, making it easy to adjust the distance between the coating head 14 and the coating shaft 4. The tension of the substrate is detected in real time by the tension sensor 23. When the tension fluctuates, the telescopic rod 29 is activated, causing the limit block 28 to drive the conveyor roller 25 to move, thereby compensating for the tension fluctuation.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-axis release paper coating machine, comprising a base plate (1) and a mounting frame (9), characterized in that: Two retainers (2) are fixedly installed on the upper surface of the base plate (1). A motor (3) is fixedly connected to the back of one of the retainers (2). A coating shaft (4) is fixedly connected to the output shaft of the motor (3). A coating shaft (5) and a coating shaft (6) are provided below the coating shaft (4). The outer surfaces of the coating shaft (4), coating shaft (5) and coating shaft (6) are rotatably connected to the inner wall of the corresponding retainer (2). Two synchronous belts (7) are provided above the base plate (1). Two pulleys (8) mesh with the inner wall of each synchronous belt (7). The inner wall of each pulley (8) is fixedly connected to the outer surface of the corresponding coating shaft (4), coating shaft (5) and coating shaft (6). The upper surface of each retainer (2) is fixedly connected to the bottom surface of the mounting frame (9).

2. The multi-axis release paper coating machine according to claim 1, characterized in that: A liquid storage tank (10) is fixedly installed on the upper surface of the mounting bracket (9), and an infusion pump (11) is fixedly installed on the outer surface of the liquid storage tank (10) through a pipe. The bottom surface of the infusion pump (11) is fixedly installed on the upper surface of the mounting bracket (9).

3. The multi-axis release paper coating machine according to claim 2, characterized in that: The output end of the infusion pump (11) is fixedly installed with a hose (12), and the other end of the hose (12) is fixedly connected to a stainless steel pipe (13). The bottom end of the stainless steel pipe (13) is fixedly installed with a coating head (14), and sliding blocks (15) are fixedly connected to both the front and back of the coating head (14).

4. The multi-axis release paper coating machine according to claim 3, characterized in that: Each of the retainers (2) has a mounting block (16) fixedly connected to its upper surface. Each of the mounting blocks (16) has a sliding groove (17) on its outer surface. The inner wall of each sliding groove (17) is slidably connected to the outer surface of the corresponding sliding block (15). Each of the mounting blocks (16) has a threaded rod (18) rotatably connected to its inner wall. The outer surface of each threaded rod (18) is threadedly connected to the inner wall of the corresponding sliding block (15).

5. A multi-axis release paper coating machine according to claim 4, characterized in that: Each of the threaded rods (18) has a pulley two (19) fixedly connected to its outer surface. The mounting bracket (9) has a timing belt two (20) on its left side. Each of the pulley two (19) meshes with the timing belt two (20).

6. The multi-axis release paper coating machine according to claim 1, characterized in that: Below the mounting frame (9) are a first conveyor roller (21) and a second conveyor roller (25). The outer surface of the first conveyor roller (21) is rotatably connected to two mounting seats (22), and a tension sensor (23) is fixedly installed on the bottom surface of each mounting seat (22).

7. A multi-axis release paper coating machine according to claim 6, characterized in that: A crossbeam (24) is fixedly connected between the two retainers (2), and the bottom surface of each tension sensor (23) is fixedly connected to the upper surface of the crossbeam (24). Two columns (26) are fixedly connected to the bottom surface of the crossbeam (24), and the bottom end of each column (26) is fixedly connected to the upper surface of the base plate (1).

8. A multi-axis release paper coating machine according to claim 7, characterized in that: Each of the columns (26) has a limiting groove (27) on its outer surface. Each limiting groove (27) has a limiting block (28) slidably connected to its inner wall. Each limiting block (28) has its inner wall rotatably connected to the outer surface of the conveying roller (25). Each limiting groove (27) has a telescopic rod (29) fixedly connected to its inner bottom wall. The output end of each telescopic rod (29) is fixedly connected to the bottom surface of the corresponding limiting block (28).

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