Method of manufacturing an ink cartridge for use in ink-jet recorder

Manufacturing method of ink cartridge for inkjet recorder

The present invention relates to a method of manufacturing ink cartridges for inkjet recorders. In particular, the present invention relates to a method of manufacturing ink cartridges for inkjet recorders. For inkjet recording, a cartridge equipped with an inkjet recording head and a replaceable ink cartridge are provided.

The ink container included in the conventional inkjet printer is carried by a cartridge equipped with an inkjet recording head, and the ink in the pressure generating chamber in the ink container is pressurized to generate ink droplets. However, when the cartridge is pivoted, or when it is shaken or moved while printing, this action causes the ink to foam. This in turn changes the head pressure or causes printing errors. In particular, when the ink contains bubbles, the pressure of the ink decreases, resulting in a decrease in the ability to squeeze out ink droplets. In this way, the air dissolved in the ink must be removed.

European Patent Publication No. 581531 has disclosed an inkjet printer to solve this problem. The ink container of this type of ink cartridge is divided into two parts. A porous material is installed in the branch close to the recording head, the ink is fed to the recording head through the porous material, and the porous material filters the dissolved air in the ink to reduce printing errors.

If you want to make a container body with porous material, you can seal the container body with a lid, fill the container with degassed ink, and pack the ink container to maintain the quality of the ink during transportation. Therefore, the manufacturing steps are complicated and the production efficiency is reduced.

Therefore, there is an urgent need to develop a manufacturing method for inkjet cartridges for inkjet recorders. In view of this, the present invention aims to provide a manufacturing method that can simply and effectively manufacture ink cartridges for inkjet recorders.

Generally, according to the present invention, a method for manufacturing an ink cartridge for an inkjet recorder is provided. The container body with a bottom wall and an opening can be placed on a pallet with the bottom wall facing upward. The container body can include a porous member, a foaming chamber containing the porous member, and an ink supply port, The ink supply port has an inlet formed on the bottom surface of the foaming chamber and an outlet. The gasket can be inserted into the ink supply port. The ink supply port can be sealed by turning the container body upside down so that the opening faces upwards and the container body weight is fixed on the pallet. A filter can be fixed to the inlet of the ink supply port, and the porous member is embedded in the foaming chamber. Then a lid can be joined to the opening of the container body, ink is injected into the foaming chamber, and the lid is sealed again. Some or all of the steps keep the container body on the pallet in series, which can effectively move the container to each station of the assembly line.

Therefore, the object of the present invention is to provide an effective method of manufacturing ink cartridges for inkjet recorders.

Other objectives and advantages of the present invention can be understood from the description.

Therefore, the steps included in the present invention and their relationship with each other can be known as disclosed below, and the scope of the present invention is defined in the scope of the patent application.

Referring to FIG. 1, an ink cartridge 70 manufactured according to an example of the method of the present invention is shown. The ink cartridge 70 includes a substantially rectangular container body 1, preferably containing color inks of cyan, red and yellow. The container body is preferably injection molded from a polymer material, such as polypropylene, polyethylene or polystyrene, so that other components can be thermally fused to the container body.

The container body 1 includes a bottom wall 12, a side wall 16 and a rear arm 1c extend upward from the bottom wall 1a, and two side walls 1d extend upward from the bottom wall 1a and are located between the front wall 1b and the rear wall 1c. The distance between the front wall 1b and the side wall 1c and the side wall 1d gradually increases as the walls 1b, 1c, 1d extend from the bottom wall 12 to the opening 1e of the container body 1, so the area of the opening 1e is larger than the area of the bottom wall 1a.

The container body 1 is divided by partitions 2, 3, and 4 to define chambers 271, 272, and 273 for storing ink and foaming chambers 160, 161, and 162 for containing porous bodies. Each foaming chamber 160, 161, 162 can contain a porous body 150, 151, 152 made of an elastic material suitable for absorbing ink. Each ink chamber 271, 272, and 273 can contain liquid ink 67. The volume of the porous bodies 150, 151, and 152 are respectively equal to the capacities of the individual foaming chambers 160, 161, and 162, so when the foaming chambers 160, 161, and 162 are inserted, the porous bodies 150, 151, and 152 are in a compressed state.

Ink is filled into the foaming chambers 160, 161, 162. When the ink is filled, each ink is introduced into the ink chambers 271, 272, and 273 through the ink circulation hole 300. When using the printer, the ink in the ink chambers 271, 272, and 273 is discharged first. After the ink chambers 271, 272, and 273 are exhausted, the ink contained in the foaming chambers 160, 161, and 162 is reused.

The container body 1 also includes a plurality of ink supply ports 180, 181, and 182. The ink supply ports 180, 181, 182 are shaped to accept the ink supply needle (not shown) of the recording head and are formed at the bottom of each foaming chamber 160, 161, 162 Walls 160a, 161a, 162a.

A lid 11 is used to seal the opening 1e of the container body 1. The lid 11 has discharge ports 190, 191, 192 and ink jet ports 100, 101, 102 above the ink supply ports 180, 181, 182 of the foaming chamber 160, 161, 162 Location. Like the container body 1, the cover 11 is preferably made of polypropylene, polyethylene or polystyrene to facilitate thermal fusion.

4A and 4B, a plan view of the cover 11 is shown, in which grooves 170, 171, 172 are formed in the cover 11 back to the surface of the cover 11. One end of the grooves 170, 171, 172 is connected to the respective discharge ports 190, 191, 192, and the other end is connected to the air circulation ports 173, 174, 175 of the inner surface of the cover 11.

A seal 19 is fixed to the surface of the cover 11 to seal the injection 100, 101, 102, the discharge ports 190, 191, 192 and the grooves 170, 171, 172 to isolate the surrounding air. The sealing body 19 includes a tongue 19a extending over the cover 11, which is structured to be easily grasped by the user. When the riser 19a rises, the seal 19 and the cover 11 are no longer sealed, and the surrounding air passes through the discharge ports 190, 191, 192, the grooves 170, 171, 172 and the air circulation ports 173, 174, 175 to the foaming chamber 160, 161, 162 inside.

As shown in FIGS. 2 and 3, a protrusion 12 extends upward from the bottom of each foaming chamber 160, 161, 162, and cooperates with the cover 11 to press the porous body 150, 151, 152. A recess 13 is formed at the upper end of each protrusion 12 to form a space of a certain area, and a circulation channel 14 is formed by each protrusion 12 and extends to the ink supply ports 180, 181, 182. A package 15 is embedded in the circulation channel 14 so that the package 15 is tightly sleeved with the ink supply needle (not shown) of the recording head to prevent fluid flow, that is, when the ink supply needle is inserted into the circulation channel 14. Preferably, the seal 16 formed of a gas-permeable material suitable for thermal fusion is fixed to the front end of the ink supply ports 180, 181, 182, and can be vented by the ink supply needle before printing.

The method of manufacturing the ink cartridge 70 will now be described. FIG. 5 shows a pallet 20 formed by an example of the present invention, which has a surface 20a whose size, space and position are suitable for transporting the container body 1 during manufacture. At least four pins 21 extend upward from the pallet surface 20a, and their sizes, intervals and positions are suitable for receiving the outer periphery of the bottom wall 1a of the container body 1. At least four pins 21 extend upward from the pallet surface 20a, and their size, spacing and position are suitable for receiving the inner surface 1f of the opening 1e of the container body 1, and a notch 23 is formed in a region of the pallet 20 corresponding to the ink supply ports 180, 181, 182 , And a floating section 24 is formed along the edge of the pallet 20 to form a sealing section during the ink filling step. The pallet 20 is useful for transporting the container body 1 to each assembly station during assembly, such as an automated assembly line.

The pallet 20 can be formed of SUS, or Ni-plated steel, Cr-plated steel, or polycarbonate, deformable PPO, POM, and the like. The material of the pallet 20 can be selected from it as needed.

6A and 6B, the ink cartridge is placed in an upside-down position so that the bottom wall 1a of the container body 1 faces upward, and the opening 1e faces the pallet surface 20a, and the container body 1 is positioned on the pallet 20, and the inner surface 1f of the container body 1 The position is close to the pin 22 supporting the container body 1 to the pallet 20. Next, as shown in Fig. 6B, the package 15 is temporarily pressed into the ink supply port 180, 181, 182 by a pressing jig 36 in the direction indicated by arrow A and then pressed into a predetermined position along the direction A. At the same time, to reduce friction and press The jig 30 rotates around the axis of the jig 30 in the direction of arrow B, and the package 15 is pressed while the package 15 is torqued. In addition, by pressing the tightly sleeved package 15, the package 15 can be reliably prevented from being separated from the ink supply ports 180, 181, 182 after the foaming chambers 160, 161, 162 are filled with ink.

Referring to FIG. 6c, an air-proof seal 16 is positioned to cover each ink supply port 180, 181, 182, and then the area around the ink supply port 180, 181, 182 is heated under the pressure of the fixture 31. In this way, the ink supply ports 180, 181, 182 are sealed with the sealing member 16. In this manufacturing stage, the batch number or expiration date can be written on the bottom wall 1a or the side wall 1d.

After the bottom wall 1a of the container body 1 is completed through the above operations, as shown in FIG. 7, the container body 1 is repositioned on the pallet 20 so that the opening 1e of the container body 1 faces upward and the bottom wall 1a is flush with the pallet surface 20a. It can be repositioned manually or mechanically.

Next, the filter 18 is placed to cover the notch 13 and preferably heat-fused under pressure until the container body 1 is slightly softer and the filter 18 and the protrusion 12 are joined. To form the filter 18, a piece of filter material, such as rust-proof steel mesh or non-woven fabric, can be cut to form a filter with an area slightly larger than the area of the notch 13 in the protrusion 12.

The method of fitting the filter 18 to the protrusion 12 is to press the filter material into a shape that matches the contour of the protrusion 12, such as a circle or an ellipse. However, if a stainless steel wire is woven to form the filter 18, the filter 18 can be cut at an angle relative to the weft and warp direction to prevent the filter 18 from unraveling. In this way, the thread of the filter 18 can be prevented from extending into the area occupied by the packaging member 15 and can be sandwiched between the ink supply needle of the recording head and the packaging member 15 when the ink cartridge 70 is connected to the recording head. If the line is positioned in this way, the airtight seal between the ink supply needle and the ink cartridge 70 may be reduced, and the ink supply needle is blocked, preventing the ink 67 from being supplied to the recording head. This prevents the filter 18 from being worn out and ensures a reliable supply of ink.

8 and 9A-9C, the steps of press-fitting the porous member 152 into the foaming chambers 160-162 will be described. Fig. 8 shows an example of a porous member embedding device 39 of the present invention. 9A-9C illustrate the method of inserting the porous member 152 into the foaming chamber 162. As shown in FIG. It can be seen that the remaining porous parts are similarly pressed into the foaming chambers 160 and 161, respectively.

As shown in FIG. 8, the porous member embedding device 39 includes comb-shaped compression members 33 and 34 and a pressing member 35 interposed between the compression members 33 and 34. The compression members 33 and 34 include bases 33b and 34b and teeth 33a and 34a, and the teeth respectively extend downward from the bases 33b and 34b. The width between the teeth 33a and 34a in the horizontal direction is as shown by the double arrow X in FIG. 9A. The teeth 33a and 34a are tapered to the free ends 33c and 34c, respectively. The compression members 33 and 34 can be moved in the X direction by an actuating mechanism (not shown) to reduce the width to X', as shown in FIG. 9B.

As shown in FIG. 9A, by actuating the compression members 33 and 34 toward the compression member 35 in the X direction until the distance between the outer edges of the compression members 33 and 34 is smaller than the inner width of the foaming chamber 162, the porous member 152 is sandwiched by the compression member 33. 34 rooms. Therefore, the porous member 152 is compressed to fit the size of the foaming chamber 162.

At this time, the porous member embedding device 39 is positioned above the foaming chamber 162, so that the tapered ends 33c and 34c of the teeth 33a and 34a are sleeved into the foaming chamber 162, and the pressing member 35 is actuated by an actuating mechanism (not shown) to force foaming The chamber 162 is in the direction of arrow Y in Fig. 9c. Thus, as shown in FIG. 9c, the porous member 152 is pressed into the foaming chamber 162. Then the pressing member 34 is lowered slightly, and the container body 1 is removed by the porous member embedding device 39. As a result, as shown in FIG. 10, the porous member 152 slightly larger than the volume of the foaming chamber 162 is set in the foaming chamber 162 in a compressed state.

Next, as shown in FIG. 11, the cover 11 is placed above the opening 1e of the container body 1 and is pressed by the pressing mechanism against the container body 1 from the arrow E direction with a certain pressure. In addition, using a jig 35, the ultrasonic oscillation cover 11 is on the same plane, in a direction perpendicular to the plane of the cover 11, in a direction obliquely intersecting with the cover 11, or a combination thereof. Therefore, the opening 1e of the container body 1 is frictionally fused (ultrasonic fusion) to the rear side of the cover 11.

12, after the lid 11 is fused to the container body 1, a heating rod 36 is heated to a sufficient temperature to soften the material of the container body 1 and the lid 11 and touch the periphery of the heating plate or jig 38 shown in FIG. 15 to ensure the heating plate 38 fusion seal 19 to cover 11. Preferably, the heat-containing gas is blown onto the container body 1 from the nozzle 37 to remove lint generated from the connecting cover 11 to the container body 1.

After the ink containers are assembled, the ink containers are placed on the pallet 20 and transported to the ink filling station. FIG. 13 shows an ink filling machine 200 of an example of the present invention, which includes a unit 40 for supporting the bracket 20. The table 40 can be vertically moved in the direction indicated by the double arrow by a driving mechanism (not shown). During this process, the container body 1 is kept upright on the pallet 20. A bed 41 is positioned on the floating section 24, and the bed 41 has a through hole for accommodating the container body 1. The pallet 20 on the upper surface of the forming chamber 43 is combined with the cover 42 on the upper surface of the forming chamber 43 to form an injection chamber 43 in the water flow 41a. The injection chamber 43 is connected to a vacuum pump 45 via a channel 44 in the bed 41.

A through hole 46 is formed in the cover 42 opposite to the injection chamber 43. A piston 47 passes through the hole 46 and keeps the injection chamber 43 in an airtight state, while moving vertically in the direction indicated by the double arrow G. The piston 47 includes an injection needle 48 facing the injection ports 100, 101, 102 of the container body 1, the container body 1 is fixed in the injection chamber 43, and a channel 50 faces the atmospheric circulation ports 190, 191, 192 of the container body 1. Connect to an air supply device (not shown). The injection needle 48 is connected to a pipe 52, a pipe 51 and a stop valve 64 through a passage 49 in the piston 41.

The ink filling machine 200 also includes a gas-liquid separation unit 53. In a preferred embodiment of the present invention, the gas-liquid separation unit 53 includes a hollow harness 54 whose two longitudinal ends are preferably liquid-tightly connected to a cylinder 55 to allow fluid to flow therethrough. The cylinder 55 is connected to a vacuum pump 56 to generate negative pressure around the outer periphery of the wiring harness 54. The cylinder 55 includes an inlet 55a connected to the ink tank 58 containing ink via a pipe 57 and an outlet 55b connected to the branch pipe 52 via a stop valve 58.

The branch pipe 52 is also connected to a measuring pipe 60 via a pipe 63. The measuring tube 62 includes a cylinder 61 and a piston 62 and is preferably connected to the branch tube 52 at the center of one end of the cylinder 61.

After the container body 1 is assembled, it is transported to the ink machine 200 on the pallet 20, and is set below the injection chamber 43, as shown in FIG. 14A. The platform 40 then rises in the H direction until the floating portion 24 of the pallet 20 abuts the lower surface of the bed 41, as shown in FIG. 14B.

Next, referring to FIG. 14C, the piston 47 is lowered to form a gap between the piston 47 and the cover 11 of the container body 1, and the piston 47 and the cover 42 form a seal. Then the stop valve 64 is opened, and keeps the stop valve 58 connected to the gas-liquid separation unit 60 in the closed position, connected to the vacuum pump 45 of the injection chamber 43 through the passage 44, and then operates to depressurize the injection chamber 43, pipes 51 and 63 and The measuring tube 60 reaches a predetermined pressure.

Referring to FIG. 14D, when the injection chamber 43 and the pipes 51, 60, and 63 are evacuated to a predetermined pressure, the stop valve 64 is closed. After that, the stop valve 58 is opened to allow the measuring tube 60 to circulate with the gas-liquid separation unit 53, and the measuring tube 60 is filled with a quantitative amount of ink. As shown in FIG. 14E, the piston member 47 is lowered so that the upper packaging members 65 and 66 on the lower end of the piston member 47 elastically contact the ink injection port 100 and the atmosphere port 190 of the container body 1, respectively. In addition, the injection needle 48 is positioned to circulate with the container body 1 and is inserted through the ink inlet 100 to the vicinity of the bottom of the container body 1. Since the gas-liquid separation unit 53 is close to the measuring tube 60, the ink immediately flows into the measuring tube 60 after being degassed by the gas-liquid separation unit 53.

Next, as shown in FIG. 14E, the stop valve 58 is closed to isolate the gas-liquid separation unit 53, and the stop valve 64 is opened, and the piston 62 of the measuring tube 60 is depressed to discharge a fixed amount of ink 67 to the foaming chamber through the ink injection port 100 Within 160. At this time, the ink 67 that has been completely degassed by the gas-liquid separation unit 53 is sucked into the porous member 150. As a result, the gas trapped in the pores of the porous member 150 that has not been removed in the aforementioned depressurizing step immediately dissolves into the ink 67. Therefore, the ink 67 is uniformly absorbed by the porous member 150 without causing bubbles to be formed in the porous member 150. When the foaming chamber 160 is filled with the ink 61, the bubbles are at least not stored in the porous member 150, and because the bubbles are introduced through the channel 50, the ink 67 provided to the recording head through the porous member 150 is free of bubbles, which can ensure the printing quality. The remaining foaming chambers 161 and 162 are then filled with ink in a similar procedure.

After the ink filling process is completed, the channel 50 is opened to the surrounding air, so the ink remaining on the upper portion of the porous member 150 is completely sucked into the porous member 150 by the pressure difference between the pressure of the porous member 150 and the surrounding pressure. Then, the platform 40 is lowered, and the pallet 20 is transported to the next combination station. Other porous parts can be similarly filled with ink. The ink attached to the ink injection port 100 during filling is wiped off by vacuum suction or cloth. Finally, a tube (not shown) contacts the ink injection port 100 and applies a small amount of positive suction to the tube to suck off the ink attached to the back side of the cover 11.

Next, as shown in Fig. 15, the container body 1 is installed in the decompression container 38 and tilted so that the discharge ports 190, 191, 192 face upward. The sealing member 19 is formed to cover at least the discharge ports 190, 191, 192, the ink inlets 100, 101, 102 and the grooves 170, 171, 172, and can be temporarily attached to the cover 11 by thermal fusion or the like. Before the cap 11 is sealed, if the pressure in the container body 1 rises due to the temperature rise, the discharge ports 190, 191, and 192 will immediately rise to a higher position, so the expansion air is immediately discharged from the discharge ports 190, 191, and 192. As a result, ink can be prevented from leaking from the ink inlets 100, 101, 102.

Then, the area of the sealing member 19 covering the grooves 170, 171, and 172 is heated, so that part of the sealing member 19 is fused to the surface of the cover 11 to form a capillary tube. The remaining main part of the sealing member 19 is attached to the cover 11 and can be peeled off from the cover 11 immediately.

It can be seen from FIG. 16 that in an ink cartridge 70 filled with ink, at least the ejection ports 180, 181, 182 are in contact with a buffer 71 to prevent the sealing member 16 from being broken. In addition, the tongue 19a of the sealing member 19 is bent, and the ink cartridge 70 is inserted into the bag 72. The bag is preferably formed of a gas barrier film and has a sleeve 72a. The sleeve 72a is located near the opening of the bag 72 and is folded inward to a uniform thickness. The opening of the bag 72 is thermally fused in a vacuum atmosphere, as shown in FIG. 17A. Finally, after packaging, the ink cartridge 70 is embedded in a housing 73 and can be shipped as a finished product (Figure 17B).

Although the ink container has been described with reference to an ink cartridge with multiple ink chambers, the present invention can be applied to the product of the ink cartridge 75 shown in FIG. 18, in which ink is only filled into the porous member 5 of the container body 1.

In addition, when the small ink cartridge 76 has the body 1" shown in FIG. 19, only an opening 77 can be formed in the ink cartridge 76 to serve as an ink inlet and an air circulation port. In this way, as shown in FIG. 20, the ink injection needle 48 and the connection The channels 50 to the discharge device (not shown) are provided coaxially with respect to each other. Therefore, an opening 77 can be used for ink injection and discharge.

As mentioned above, the present invention provides a method for manufacturing ink cartridges suitable for inkjet recorders, which includes the steps of: setting a substantially rectangular container body with an opening on a pallet so that the bottom of the container body faces upwards, and the container body includes elastic The porous member formed by the material absorbs ink, the foaming chamber is used for combining the porous member inside, and an ink jet port is formed in the bottom surface of the foaming chamber; a package is embedded in each ink jet port and the sealing film is thermally fused to the ink jet The opening of the mouth; invert the container body to an upright position and reset it on the pallet; fix the filter material to the inlet side of the ink jet port; press the pressurized porous member into the porous member; join a lid to the opening of the container body to form the container ; Fill a fixed amount of ink into each foaming chamber, and keep the container in a vacuum environment; and join a seal to the surface of the lid. As a result, the ink cartridge can be transported on the pallet during each manufacturing step to efficiently manufacture the ink cartridge.

It can be seen from the above that the above objective can be effectively achieved by the description, and various changes can be made to implement this method without departing from the scope of the present invention. Therefore, the above and the drawings are for illustrative reference and are not intended to limit the present invention.

It is also known that the following patent application scope includes all the general and specific characteristics of the present invention, and all statements on the scope of the invention are included in it.

<p>70Ink Cartridge</p><p>1Container body</p><p>1aBottom wall</p><p>1bFront wall</p><p>1cBack wall</p><p>1d side wall</p><p>2Partition</p><p>3Partition</p><p>4Partition</p><p>271Ink Room</p><p>272Ink Room</p><p>273Ink Room</p><p>160Foaming room</p><p>161Foaming room</p><p>162Foaming room</p><p>150Porous body</p><p>151Porous body</p><p>152Porous body</p><p>67Liquid ink</p><p>300Ink circulation hole</p><p>180Ink feeder</p><p>181Ink feeder</p><p>182Ink feeder</p><p>160aBottom wall</p><p>161aBottom Wall</p><p>162aBottom wall</p><p>36Fixture</p><p>8Ink entrance</p><p>31Fixture</p><p>18Filter</p><p>13Notch</p><p>39Porous parts embedding device</p><p>35Compression Piece</p><p>33Compressed parts</p><p>34Pedestal</p><p>33bPedestal</p><p>34bBase</p><p>33atooth</p><p>34atooth</p><p>33cFree end</p><p>34cFree end</p><p>37Nozzle</p><p>38Fixture</p><p>40Taiwan</p><p>41Bed</p><p>41aThrough hole</p><p>43Injection room</p><p>42Cover</p><p>44Channel</p><p>45Vacuum pump</p><p>46Through hole</p>

To fully understand the present invention, refer to the accompanying drawings and the following description: Figure 1 is a perspective exploded view of the ink cartridge made by the method of the present invention; Figure 2 is a side sectional view of the ink cartridge of Figure 1; Figure 3 is a front sectional view of the ink cartridge of Figure 1; 4A is the lid of the ink cartridge of FIG. 1 without a seal; FIG. 4B is a plan view of the lid of FIG. 4A with a seal; FIG. 5 is a perspective view of a pallet for holding and transporting the container body used in the method of the present invention; The initial steps of an ink cartridge manufacturing method according to an example of the present invention; Figure 7 shows the steps of connecting a filter to the ink supply inlet, according to the ink cartridge manufacturing method of the present invention; Figure 8 is a perspective view of an example of a porous member embedding device used in the ink cartridge manufacturing method of the present invention 9A, 9B and 9C, is a step of inserting the porous member into the foaming chamber of the container body, according to the ink cartridge manufacturing method of the present invention; Figures 10-12 show the intermediate steps of the ink cartridge manufacturing method of the present invention; Figure 13 shows the present invention An ink filling machine for an example of the ink cartridge manufacturing method; Figures 14A-14E show the ink filling procedure of the ink cartridge manufacturing method of the present invention; Figure 15 shows the sealing cap steps of the ink cartridge manufacturing method according to the present invention; The first step of the packaging process of the cartridge manufacturing method; Figures 17A and 17B show the final steps of the packaging process according to the ink cartridge manufacturing method of the present invention; Figure 18 is the ink cartridge manufactured in the second example of the present invention; Figure 19 is the third example of the present invention The manufactured ink cartridge; and FIG. 20 is a block diagram showing the ink filling machine used in the second example of the ink cartridge and the manufacturing method of the present invention.