KR20080086802A - Jet fabric dyeing machine - Google Patents

Abstract

A jet fabric dyeing machine is provided to encompass a moving tube and a storage chamber within an outer container in common wholly, thereby preventing the difference of temperature from generating. A storage chamber(36) is communicated at both ends of a moving tube(39) and forms an infinite moving path to an infinite cloth rope(34). A nozzle(38) makes the dyeing solution locate toward the infinite cloth rope so that the infinite cloth rope is advanced to the circumference of the moving path. An outer container(35) encompasses the storage chamber and the moving tube wholly. The outer container forms the storage chamber and the moving tube is received in the inside of the outer container. The moving tube is also located at the lower portion of the outer container. An array with bars is located on the moving tube and forms the lower boundary of the storage chamber. The bar is coated by materials with the low friction force.

Description

Jet Fabric Dyeing Machine {JET FABRIC DYEING MACHINE}

1 is an outer side view of a conventional high speed jet fabric dyeing machine.

Figure 2 is a side cross-sectional view of a jet fabric dyeing machine according to an embodiment of the present invention.

3 is an outer side view of the jet fabric dyeing machine of FIG.

4 is a side cross-sectional side view of a jet fabric dyeing machine according to another embodiment of the present invention.

5 is a perspective view of a twin nozzle assembly according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1, 3: dyeing machine

10, 21: Moon

11, 36: storage chamber

12, 38: nozzle

13, 39: moving tube

22: leg

32: roller

34: weaving rope

35: outer container

42: separator

43: Bar

50: nozzle element

52: pipe

The present invention relates to jet fabric dyeing machines and their improvements.

Jet fabric dyeing machines are used for wet treatment (dyeing) of fabric and textile materials arranged in a continuous rope form, circulating around the dyeing machine in contact with the saline solution, which is directed at high speed over the fabric by jet nozzles and advances the fabric along the direction of travel. Used.

Typically, the dyeing machine includes a nozzle, a moving tube connected to the outlet of the nozzle, a main storage chamber and a roller, through which the fabric passes through the nozzle, the fabric moves along the outlet of the nozzle, and the fabric moves through the nozzle. Within the saline solution, the fabric from the transport tube passes into the main storage chamber, the fabric accumulates in the main storage chamber while excess saline falls from the fabric, and the rollers are stored for the next cycle through the dyeing machine. The fabric is fed forward to the entrance of the nozzle. The moving tube and the storage chamber are arranged almost horizontally, the nozzles face down the fabric, and the nozzle and the moving tube together form an L-shaped structure.

Similar dyeing machines are described in US 4,019,351 and JP 6-272,152.

This type of elongate dyeer maximizes the amount of fabric that a single dyeer can handle by allowing long lengths of fabric to be accommodated.

For fabrics, especially for materials such as polyester and micro-fiber fabrics, which are light in weight and susceptible to wrinkles, the dyeing temperature and the interaction between the dye solution and the fabric are important for the success and quality of the dyeing process. However, the elongate dyeing machine occupies a wide overall length, so the temperature at one end of the dyeing machine may be significantly different from the temperature at the other end. In addition, long fabric lengths may make it difficult to achieve the required interaction between saline and fabric within acceptable time intervals, where insufficient fabric-saline interaction increases the amount of wrinkles. Typically the fabric is circulated at high speed so that the fabric turn time is less than 2.5 minutes.

A first aspect of the invention is a moving tube; A storage chamber in communication with both ends of the transfer tube to form an endless travel path for the endless fabric rope; A nozzle operable to advance the endless fabric rope around the travel path by directing the salt jet onto the endless fabric rope; And an outer container surrounding both the storage chamber and the moving tube.

Many parameters affect the quality of the dyeing process, one of which is temperature. Dyeing is generally carried out at high temperatures, for example by heating a salt solution applied to the fabric. Conventional jet dyeing machines have exposed storage chambers and moving tubes, which allow temperature differences and temperature gradients to occur across the dyeing machines, and are typically elongate with significant lengths. Such non-uniform temperatures can be detrimental to dye quality. The present invention proposes to solve this by enclosing both the moving tube and the storage container in the same outer container, which serve to reduce the temperature difference and maintain a more uniform and constant temperature profile across the dyeing machine.

In some embodiments, the outer container may form a storage chamber with a moving tube housed inside the outer container. This structure is a particularly simple method of practicing the present invention because no additional outer container is needed by using the storage chamber itself as the outer container and by placing the transport tube, which is usually located outside, inside the outer container.

In such a device, the moving tube may be located at the bottom of the outer container. This is advantageous in that the tube moves a volume of saline collected at the bottom of the storage chamber / outer vessel for recycling to the nozzle, so that the total volume of saline required is smaller and the liquid ratio can be smaller.

The dyeing machine further comprises an array of bars disposed over the moving tube and forming the lower boundary of the storage chamber. The bar partitions the storage chamber from the moving tube at the base of the outer container and allows the excess salt solution separated from the fabric in the storage chamber to fall to the base of the outer container so that it can be collected and recycled to the nozzle.

The bar may be coated with a low friction material. This reduces friction between the bar and the fabric, allows the fabric to pass easily along the infinite path of travel, and also reduces wear on the fabric that would otherwise result from contact with the bar.

In some embodiments, the end of the moving tube may be connected to the outlet of the nozzle and may be inclined downward from the nozzle. This allows gravity to contribute to the progress of the fabric rope, and increases the speed of movement of the fabric without the need to increase the power of the salt jets applied by the nozzles.

The moving tube may be inclined down at an angle of at least 3 degrees with respect to the horizontal. For example, the moving tube may be inclined down at an angle of between 3 and 5 degrees with respect to the horizontal. This angular range is a compromise between maximizing the beneficial role of gravity as having a large slope and providing sufficient depth and volume for the saline solution in the transfer tube to wet the fabric. The latter requires a gentle slope or zero slope.

The storage chamber may be inclined upward with respect to the direction of movement of the endless fabric rope across the storage chamber. The upwardly inclined storage chamber improves the separation of the saline solution from the fabric in the storage chamber and also improves the collection of the separated saline solution because the saline solution is discharged to the bottom of the chamber. For example, the storage chamber may be inclined upward at an angle of 3 to 5 degrees with respect to the horizontal.

In embodiments with inclined components, the moving tube and the storage chamber may be nearly parallel. This reduces the overall volume of the dyeing machine and minimizes the volume of the outer container.

The textile dyeing machine further includes a door accessible through the interior of the dyeing machine, which door is located on an end wall of the outer container and on a substantially vertical face. The end wall of the outer container in which the door is located may be lifted. The outer container may have a non-horizontal longitudinal axis in an area of the end wall that is substantially not perpendicular to the vertical plane of the door. Doors arranged in this way are easier to operate and provide easier and safer access into the dyeing machine. Especially in dyeing machines in which the transport tube and storage chamber are inclined, the door can be at a significant height above the ground, so proper tilting of the door improves accessibility and ease of use.

In another embodiment, the fabric dyeing machine comprises a second moving tube; A storage chamber in communication with both ends of the second traveling tube to form a second infinite travel path with respect to the endless fabric rope; And a second nozzle operable to advance the endless fabric rope around the second travel path by directing the salt jet onto the endless fabric rope, in which case the outer container also surrounds the second moving tube. The second moving tube and the second nozzle, which share the same storage chamber with the first moving tube and the first nozzle, double their production capacity without increasing the size of the dyeing machine, require less components, and It is cheaper than having two individual dyeing machines. In addition, the liquid ratio may be smaller for a dyeing machine with twice the production capacity than if two separate dyeing machines dye one fabric rope.

In a dyeing machine having a single movement path, the outer container may form a storage chamber together with both the moving tube and the second moving tube contained within the outer container. The moving tube and the second moving tube may be located under the outer container.

The fabric dyeing machine may further comprise a partition that divides the storage chamber into two parts, one part being included in the infinite travel path and the other part contained in the second infinite travel path. This prevents the two fabric ropes from getting tangled in the storage chamber.

At least a portion of each moving tube may have a square cross section. Application of salt jets at the nozzles is undesirable because it tends to twist and rotate the fabric. Square moving tubes reduce this effect compared to conventional moving tubes of circular cross section. In particular, each moving tube may have a square cross section in the area that connects with the outlet of the associated nozzle. This resists warping or helical motions close to the source, so this warping or helical motion is more effectively reduced.

Reference is made to the accompanying drawings by way of example in order to better understand the present invention and to show how it may be practiced.

1 is an outer side view of a conventional high speed jet fabric dyeing machine, wherein a dye jet directed up the fabric by the nozzles circulates the fabric of the endless rope through the dyeing machine, and the salt solution is recycled in the dyeing machine and thus applied to the fabric. The discharged salt solution is then supplied to the nozzle again.

The dyeing machine 1 comprises a main storage chamber 11 in the form of a large diameter pipe or cylindrical vessel arranged horizontally. One end of the storage chamber is inclined upward and has an outlet that connects with the inlet of the tubular nozzle 12. In addition, the nozzle 12 is cylindrical, smaller in diameter than the storage chamber 11 and directed substantially downward. The fabric may pass through the nozzle 12, which is provided with nozzle spacing or jets through which the high velocity jets or jets of saline solution are directed inwardly over the fabric in the nozzle, thereby moving the fabric in the forward circulation direction through the nozzle. Let's go.

The nozzle 12 is connected at its outlet with a moving tube 13 having a diameter much smaller than the storage chamber 11 while being positioned substantially horizontally below the storage chamber 11. The end of the moving tube 13 away from the nozzle 12 is curved upward and connected to the end of the storage chamber 11 away from the nozzle 12. Thus, the main storage chamber 11, the nozzle 12 and the moving tube 13 are combined to form a container in the form of a continuous elongated tubular ring with varying diameters. This forms an infinite path of travel across the container, along which the fabric of continuous rope can be circulated for dyeing.

The door 10 is provided at the end of the storage chamber 11 closest to the nozzle 12 and provides access to the inside of the dyeing machine 1 to insert or remove the fabric. The dyeing machine 1 further comprises a rotating roller disposed inside the storage chamber 11 and slightly upstream of the inlet to the nozzle 12, ie at position 14. Since the axis of rotation of the rotating roller is perpendicular to the path face of the fabric rope, the fabric rope passes over the outside of the roller and is pulled along the roller to feed the fabric from the storage chamber 11 into the nozzle 12.

The dyeing machine 1 is also integrated with a salt solution circulation system that collects the salt solution falling from the fabric and supplies the salt solution to the nozzle 12 to be sprayed onto the fabric. A volume of salt solution is contained in the transfer tube 13 so that the fabric can get wet as it passes through the transfer tube. The salt solution then leaves the fabric while the fabric is in the storage chamber 11 and is collected from the bottom of the storage chamber and sent back to the nozzle 12.

The rate of movement of the fabric, together with the dyeing cycle time required for the fabric, limits the maximum length of the fabric that can be circulated in the dyeing machine. Therefore, especially in light weight fabrics, the production capacity may be relatively small. The speed of migration can be faster in terms of increasing the total production capacity of the dyeing machine. In order to increase the speed of movement, the nozzles are generally positioned vertically as shown in FIG. 1 and advance the fabric downward.

However, at high speeds, there is still a need to allow adequate time for liquid exchange between the fabric and the saline solution. Liquid exchange is generally done in the transfer tube 13, and the fabric is soaked in this transfer tube for about 4 or 5 seconds before proceeding to the storage vessel 11. The moving tube is positioned horizontally to maintain a reservoir of salt solution over its entire length. The combination of the vertical nozzle 12 and the horizontal moving tube 13 together form a long L-shaped structure.

The fabric is soaked in the moving tube 13 and then moved upwardly into the main storage chamber 11. To reduce the water consumption per fabric weight, known as the liquid ratio, the salt liquor is separated from the fabric in the storage chamber 11 by separating it from the fabric, and the salt liquor accumulates in the folded groove in the storage chamber 11. The separated salt solution enters the circulation pipe and is returned to the nozzle 12 by a pump. Once the accumulated fabric is moved forward to the front of the storage chamber 11, the fabric is lifted by the rollers and enters the nozzle 12 for another saline exchange cycle.

Jet flow of saline onto the fabric typically results in delivery rates in the range of 200 to 300 meters per minute. This speed is the fastest titration speed generally attained in a machine such as the dyeing machine of FIG. 1, balancing the requirements for circulation time, liquid ratio and smooth running of the fabric. The temperature at which the dyeing process is performed is also important, and the salt solution is often heated, for example by passing through a heat exchanger included in the salt circulation pipe system.

Figure 2 shows a side cross-sectional view of a jet fabric dyeing machine according to an embodiment of the present invention. The dyeing machine 3 comprises a main storage chamber 36, a roller 32, a nozzle 38 and a moving tube 39 arranged in the same sequence as in the conventional dyeing machine of FIG. 1. The dyeing of the endless fabric rope 34 is done in the conventional manner described above, and the direction of movement of the fabric is shown by the arrows. However, the dyeing machine 3 includes a number of additional features aimed at improving the dyeing process.

First of all, the storage chamber 36 and the moving tube 39, which are elongate and one above the other, surround both components (and in this embodiment also include the nozzle 38 and the roller 32). It is housed in a common outer container 35. This arrangement focuses on solving the problem of temperature differences that may occur between the storage chamber and the moving tube and also between their different ends, in a dyeing machine in which the components are separated on the outside as in FIG. 1. Puts. Reducing or eliminating the temperature difference improves the quality of the dyeing process and results in a more uniformly dyed fabric, since the dyeing results are temperature dependent.

In the example of FIG. 2, the outer container 35 and the storage chamber 36 are formed by the same tubular wall, and the moving tube 39 is located inside the tubular wall. Using a common wall for the outer container 35 and the storage chamber 36 provides a simple configuration where less material is needed to make the dyeing machine 3. Alternatively, however, both the storage chamber 36 and the moving tube 39 are inside a separate outer container 35 that surrounds without forming any part of either the storage chamber 36 or the moving tube 39. It may be a separate structure located at. Such a device may improve temperature uniformity, since the salt solution in both the storage chamber 36 and the moving tube 39 is separated from the external environment by two walls.

Another advantage of the above-described device, in which the outer container forms a storage chamber and the moving tube is located within the bottom of the outer container, is that the moving tube carries liquid collected at the bottom of the storage chamber / outer container and thus has a smaller total volume. The use of liquid reduces the liquid ratio of the dyeing machine. Lower liquid ratios are more cost-effective because less volume of saline can be used to dye the same weight of fabric.

In addition to reducing the temperature difference, it is desirable to achieve a faster fabric circulation rate than is possible with conventional dyeing machines. For this purpose, a method of increasing the ejection power generated by the salt jet from the nozzle can be used, but this leads to an undesirable change in the liquid ratio. In addition, higher pressure liquid jets cause greater friction between the fabric and the salt solution, which can damage the fabric structure and surface texture.

As a result, the present invention proposes to solve this problem by arranging the moving tube 39 along the downward slope from the outlet of the nozzle 38 in place of the conventional horizontal moving tube.

The downward inclination of the moving tube 39 allows gravity to help the fabric rope 34 move along the moving tube 39, thereby increasing the pressure of the salt jet applied by the nozzle 38. Increases fabric movement speed without However, the angle of downward inclination must be carefully chosen to balance the advantages given by gravity against the need for sufficient volume of saline to be maintained inside the moving tube 39 for liquid exchange with the fabric.

It has been found to be particularly advantageous to achieve an angle of at least 3 degrees with respect to the horizontal, and the optimum angle made by the downwardly moving tube 39 for the horizontal is included in the range of 3 to 5 degrees.

It is also useful that the storage chamber 36 can be located at a small angle with respect to the horizontal, but is inclined uphill with respect to the direction of movement of the fabric rope 34, ie, to the roller 32 and the nozzle 38. . It is also advantageous to be in the 3 to 5 degree range. In addition, the storage chamber 36 may be disposed parallel to the moving tube 39. This minimizes the volume of the outer container 35 and minimizes the total space occupied by the dyeing machine as a whole. The upward incline on the storage vessel 36 helps the liquid separate from the fabric and also helps the liquid to collect at the rear end 37 of the storage chamber 36. Therefore, liquid separation is performed more effectively and earlier, and the separated liquid can be collected into the circulation pipe more easily. However, the inclination should not be too severe, because the fabric needs to be moved upward through the storage chamber 36 and at a steeper angle this becomes more difficult.

FIG. 3 shows the outer side view of the dyeing machine 3 of FIG. 2 and shows how the outer container 35 surrounds all the components. The elongate outer container 35 is supported near each end on the leg 22 which is longer at the end closest to the nozzle in order to give the moving tube and storage container the desired inclination. In addition, the door 21 is provided in the outer container 35 in the dyeing machine. The door 21 allows access to the interior of the dyeing machine and allows the fabric to be inserted into the dyeing machine 3 for dyeing and to be removed after dyeing. The door 21 is provided on the end wall of the outer container 35 closest to the end of the dyeing machine where the nozzle is located. In a conventional dyeing machine, such as the dyeing machine of FIG. 1, the door is similarly located at the end wall of the storage chamber, in which case the end wall is substantially perpendicular to the longitudinal axis of the storage chamber at its end. However, if such a device is adopted in a dyeing machine having an inclined configuration according to an embodiment of the present invention, it becomes difficult to access the door 21 due to the height of the nozzle end of the dyeing machine resulting from the inclination. Thus, an embodiment of the present invention proposes to maintain the door on the end wall of the dyeing machine adjacent to the nozzle but to arrange the end wall / door at an angle with a plane perpendicular to the longitudinal axis of the end of the outer container, otherwise Rather, make the door close to vertical. This makes the door easier to access and operate. In some embodiments, the door 21 is disposed in a vertical plane.

In another embodiment, it is proposed to increase the production capacity of the dyeing machine by constructing the dyeing machine so that two endless weaving ropes can be processed simultaneously. This is accomplished by providing two moving tubes and two nozzles arranged side by side below the storage chamber. Each nozzle and moving tube assembly receives a separate fabric rope. However, the two nozzles and the moving tube assembly share a common storage chamber. Vertical longitudinal partitions may be provided to partially partition the storage chamber. This separates the two circulation ropes and prevents them from getting tangled while in the storage chamber.

4 shows a cross-sectional view of a dyeing machine according to this embodiment at the midpoint of the outer container. 4 shows two moving tubes 39 arranged adjacent to each other at the bottom of the outer container 35 and a storage chamber 36 in which the upper part of the outer container 35 is shared by the two moving tubes. It shows what is forming. A vertical partition or separator 42 disposed along the center of the storage chamber 36 divides the storage chamber into a left portion 41A and a right portion 41B to provide a storage chamber for each transport tube 39. . At the lower boundary of the portions 41A, 41B of the storage chamber are arranged an array or grid of spaced metal bars 43. These arrays or grids are preferably coated with Teflon (RTM) or similar material with low adhesion or low friction to reduce friction between the bar and the fabric, which can wear or damage the fabric. Thus, bar 43 lies between storage chamber 36 and moving tube 39. Bars 43 allow the fabric to continue to circulate in the storage chamber and allow the saline separated from the fabric to fall to the bottom of the outer container to be collected and recycled by a liquid circulation system (not shown). The circulation system uses one pump to supply the saline solution to the two nozzles, ensuring that the dyeing parameters remain the same for each fabric rope. This is reinforced by a shared storage tank and also allows a common volume of saline solution to be used for both fabric ropes. Thus, the same dyeing effect can be obtained for both ropes, and the production capacity is doubled while the quality between the ropes remains the same.

In addition, the coated metal bar can be employed in a dyeing machine having only one nozzle and a moving tube assembly.

5 shows a perspective view of a parallel nozzle and moving tube assembly. In this embodiment, two nozzles 38 are formed in a single nozzle element 50. However, individual elements may be used. The nozzle is a circular hole through which the fabric proceeds. The gaps formed in the walls of each hole direct the salt jet over the fabric so that the fabric advances into the associated travel tube 39. The moving tube 39 is a pipe or tube connected with the outlet of the associated nozzle 38. These pipes may have a circular cross section along its entire length (not shown).

However, using a liquid jet to advance the fabric and increasing the speed of movement tends to slightly warp the fabric. After a long period, this can cause problems. Therefore, it is desirable to minimize this distortion.

In an embodiment of the present invention, this is solved by proposing the use of a moving tube having a rectangular cross section (the square comprises a square) instead of a pipe of a conventional circular cross section. The square transfer tube reduces the helical movement of the fabric rope caused by the saline jet, effectively reducing the warping of the moving fabric. 5 shows two parallel moving tubes 39 having a square cross section connected to the outlets of two parallel nozzles 38. The square cross section may extend over all or a portion 51 of the moving tube 39, and then the circular pipe 52 for easier connection with the other part of the dyeing machine (connection with the storage chamber 36). It can also be connected with.

In addition, rectangular cross sections can also be used in dyeing machines having only one moving tube and nozzle.

Similarly, other features of the fabric dyeing machine described above can be employed without the remaining features. For example, an inclined moving tube and / or an inclined storage chamber can be used in a dyeing machine that does not include an outer container surrounding all of these components. Only one of the transport tube and the storage chamber may be inclined. Doors that are angled to the approximate longitudinal axis of the dyeing machine, or doors that are angled generally vertically, may be used to further facilitate access to the interior of any dyeing machine that would otherwise be difficult to access.

According to the present invention, a jet fabric dyeing machine is provided which encloses both the moving tube and the storage chamber in a common outer container so that temperature differences and temperature gradients do not occur across the dyeing machine and maintain a uniform and constant temperature profile. In addition, having a second moving tube and a second nozzle sharing the same storage chamber with the first moving tube and the first nozzle allows for twice the production capacity and less components without increasing the size of the dyeing machine. And a lower cost jet fabric dyeing machine than two separate dyeing machines are provided. Then, a jet fabric dyeing machine is provided in which at least a partial cross section of the moving tube has a square cross section so that the fabric does not twist or rotate in the process of applying the salt jet at the nozzle.

Claims (20)

Moving tube 39; A storage chamber 36 in communication with both ends of the transfer tube to form an endless travel path for the endless fabric rope 34; A nozzle 38 operable to direct the salt jet onto the endless fabric rope and to advance the endless fabric rope around the travel path; And An outer container 35 surrounding both the storage chamber and the moving tube Fabric dyeing machine comprising a. The fabric dyeing machine according to claim 1, wherein the outer container forms a storage chamber, and the moving tube is received inside the outer container. The fabric dyeing machine according to claim 2, wherein the moving tube is located under the outer container. 4. The textile dyeing machine according to claim 3, further comprising an array of bars (43) located above said moving tube and forming a lower boundary of said storage chamber. 5. A textile dyeing machine according to claim 4, wherein the bar is coated with a low friction material. The fabric dyeing machine according to any one of claims 1 to 5, wherein the end of the moving tube is connected to the outlet of the nozzle and is inclined downward from the nozzle. The fabric dyeing machine according to claim 6, wherein the moving tube is inclined downward at an angle of at least 3 degrees with respect to the horizontal. The fabric dyeing machine according to claim 6, wherein the moving tube is inclined downward at an angle between 3 and 5 degrees with respect to the horizontal. The fabric dyeing machine according to any one of claims 1 to 8, wherein the storage chamber is inclined upward with respect to the direction of movement of the endless fabric rope over the storage chamber. 10. The fabric dyeing machine of claim 9 wherein the storage chamber is inclined upward at an angle of between 3 and 5 degrees with respect to the horizontal. The fabric dyeing machine according to any one of claims 6 to 10, wherein the moving tube and the storage chamber are approximately parallel. 12. The device according to any one of the preceding claims, further comprising a door (21) and accessible through the door to the interior of the dyeing machine, which door is located on an end wall of the outer container and is a substantially vertical plane. Fabric dyeing machine which is located in. 13. The fabric dyeing machine according to claim 12, wherein the end wall of the outer container in which the door is located is lifted up. The textile dyeing machine according to claim 12 or 13, wherein the outer container has a non-horizontal longitudinal axis in an end wall region that is not substantially orthogonal to the vertical plane of the door. The method according to any one of claims 1 to 14, Second moving tube 39, A storage chamber in communication with both ends of the second traveling tube to form a second infinite travel path for the endless fabric rope; and Second nozzle 38 operable to advance the endless fabric rope about the second travel path by directing the salt jet to the endless fabric rope. Further comprising: the outer container also surrounds a second moving tube. The textile dyeing machine according to claim 15, wherein the outer container forms a storage chamber, and both the moving tube and the second moving tube are housed in the outer container. The fabric dyeing machine according to claim 16, wherein the moving tube and the second moving tube are located under the outer container. 18. The device of any one of claims 15 to 17, further comprising a partition (42) that divides the storage chamber into two portions (41A, 41B), one portion of which is contained within the infinite path of travel. And one portion to be contained within the second endless travel path. 19. The fabric dyeing machine according to any one of the preceding claims, wherein at least a portion of each moving tube has a square cross section. 20. A textile dyeing machine according to claim 19, wherein each moving tube has a square cross section in an area connected with an outlet of an associated nozzle.

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