JP2684508B2 - Inkjet cartridge and inkjet printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a pre-ejecting ink
Liquid state that is supplied to the inkjet head
Ink-jet cartridge containing ink and the same
Inkjet printers with cartridges installed
In particular, the chamber that stores the recording liquid and the negative pressure are generated.
(A) A structure having both a chamber accommodating an absorber as a member
Cartridge for ink jet and mounting of the cartridge
In inkjet printers, copiers, recording devices such as a facsimile, a communication device, a composite device, to applicable inventive to the printer.

[0002]

2. Description of the Related Art Conventionally, an ink cartridge for ink jet is integrated with an ink jet head, and when ink in the cartridge cannot be ejected, it is often discarded together with the head. The amount of ink remaining in the cartridge at this stage is relatively large, even if improvements are made, due to the ink holding capacity of the sponge, which is a negative pressure generator housed almost entirely in the cartridge. Had been lost.

An ink container of this type is disclosed in Japanese Patent Laid-Open No. 63-6.
No. 3242 can be mentioned. That is, it is a cartridge of one ink jet recording head having a foam material disposed in an ink container and having a plurality of ink ejection orifices. In this ink container, since ink is stored in a porous medium such as polyurethane foam, which is a foam material, a negative pressure is generated by the capillary force of the foam and the ink is retained (prevention of ink leakage from the ink container). However, since the foam is required almost entirely in the ink storage layer, the filling amount of the ink is limited and the amount of the ink that remains unused in the foam is large, resulting in poor ink use efficiency. was there. Further, there is a problem that it is difficult to detect the remaining amount of ink, and furthermore, the negative pressure gradually changes during the ink consumption period, and it is difficult to maintain a substantially constant negative pressure.

[0004] In contrast to this configuration, there is a gazette that discloses a cartridge that employs a configuration in which an ink cartridge holds substantially only ink. In other words, Japanese Patent Application Laid-Open No. 2-522 discloses an ink jet printer in which a slight porous member is arranged between a primary ink storage unit which is located above and holds a large amount of ink alone and an ink jet recording head which is located below. An ink cartridge integrated with a recording head is disclosed. According to the invention, the use efficiency of ink can be improved by disposing the porous member only in the ink flow path without being built in the ink storage section. Further, by providing a secondary ink storage section as a space capable of holding ink on the side of the porous member, primary ink storage due to expansion of air in the primary ink storage section due to temperature rise (pressure drop). It is stated that the ink flowing out of the printing section can be collected and the negative pressure on the recording head during recording can be maintained substantially constant.

However, according to the invention of this publication, during non-printing, the porous member is impregnated with ink from the primary ink storage portion which is located above and holds only a large amount of ink, so that the ink is too much. Therefore, generation of negative pressure in the porous member itself is almost eliminated.
Therefore, there is a problem that the ink leaks from the orifice of the ink jet recording head due to a slight impact,
Not practical. In addition, adopting a replaceable ink cartridge type in which an ink container is mounted on an ink recording head in this configuration has a problem that the state of the porous member causes an ink leak and cannot be put to practical use.

[0006] On the other hand, there is known an ink cartridge which is provided with a spring structure for keeping the negative pressure of the bag by enclosing the ink in the bag, but it is not only expensive but also expensive. It has been difficult to achieve mass production while maintaining the performance of the spring configuration.

In any case, no inexpensive ink jet (non-contact recording print type) ink cartridge having a reasonable technical level has been provided in the field of ink jet printing.

[0008]

BACKGROUND OF THE INVENTION The present inventors have proposed that as an ink container suitable for the technical field of ink jet printing, it is possible to satisfactorily supply ink corresponding to the amount of ink ejected from a recording head during printing. The two-sidedness was examined to ensure that there was no inconvenience such as ink leakage from the ejection port during printing. As a result, as a basic configuration, a first storage chamber that houses the negative pressure generating member and has an air communication portion for obtaining communication with the atmosphere and communicates with the first storage chamber, but is substantially sealed. Thus, the configuration having the second storage chamber for directly storing the ink to be supplied to the first storage chamber is an important premise for the characteristics of the ink jet.

On the other hand, the present inventors have studied contact recording technology different from the technical field of the present invention,
We decided to review the technical peculiarities of the inkjet printing field. Generally, a recording instrument pen that makes contact with a recording medium to perform recording supplies ink to a recording core that has ink absorbability and retention, and therefore the recording core itself is exposed to the atmosphere. , The technical content of the inkjet field is fundamentally different.

As a result of investigation, it was found that Japanese Patent Laid-Open No. 16385/1982.
No. gazette was found. This publication discloses a recording instrument pen that is premised on the use of a recording core (a porous ink-absorbent core) that makes contact with a recording medium to perform recording. Only the ink overflowed.

This publication discloses a first recording medium that contacts a lower recording core.
A central portion having a liquid absorbing material and a second liquid absorbing material that slightly absorbs ink but is less likely to contain ink than the first liquid absorbing material on the upper air communication port side, and the recording core protrudes downward. This is an invention in which a chamber and a sealed ink storage chamber for supplying ink to both sides of the chamber are essential components. According to this configuration, the air in the closed ink storage chamber expands due to an increase in the ambient temperature, the ink in the closed ink storage chamber reaches the first liquid absorbing material, and the ink that the first liquid absorbing material can no longer hold can be held. Is absorbed by the second liquid absorbing material, thereby preventing the ink from overflowing from the recording core and falling. Further, in this publication, when one of the two closed ink storage chambers becomes air only, a groove having a constant width is formed to allow the expansion of the air to escape to the atmosphere communication port side. It is also disclosed that the partition wall is provided from the lowermost end to the uppermost end of the side surface different from the partition wall.

The present inventors have focused on applying only this tank configuration to an ink jet head of non-contact recording having few technical similarities. A new phenomenon of ink overflow was confirmed.

This novel phenomenon has not been recognized in the field of recorder instrument pens.

Further, since the groove having a constant width in the above publication also has a function of promoting discharge of ink together with air, it further promotes ink overflow from the atmosphere communication port.

Further, the ink consumption from the ink storage chambers on both sides is not equal, and when the ink in one ink storage chamber is exhausted first, the ink jet recording is performed even though a large amount of ink remains in the other ink storage chamber. I couldn't do it. This was a result of wasting the ink in the ink storage chamber, which was fundamentally contrary to the object of the present invention. This was because a large amount of air entered the first liquid absorbing material, and as a result, ink could not be supplied.

[0016]

SUMMARY OF THE INVENTION The main object of the present invention is to accommodate a negative pressure generating member and to communicate with the first storage chamber having an atmosphere communication portion for establishing communication with the atmosphere. Is provided with a characteristic that it can effectively function as an inkjet printer, to a cartridge of a pre-requisite having a second storage chamber for directly storing ink to be supplied to the first storage chamber in a substantially closed state. It is to provide a revolutionary ink cartridge that solves the problem. Another object of the present invention is to provide a replaceable ink cartridge capable of keeping a negative pressure substantially constant from the beginning to the end of use of the ink cartridge and capable of high-speed recording, and an inkjet head using the same. It is also to provide a printer.

Another object of the present invention is to provide a replaceable ink cartridge which develops a negative pressure in the ink cartridge even during non-recording and does not leak ink from the opening due to a slight impact.

Still another object of the present invention is to provide an ink cartridge which can reduce the amount of ink remaining in the ink cartridge as much as possible.

Still another object of the present invention is to provide a replaceable ink cartridge which is cheaper under the conditions of distribution and manufacture of the replaceable ink cartridge alone and has an increased ink leakage prevention function. is there.

The present invention is based on a technical point of view that the conventional state of the art is wiped out regardless of the storage state or the use state of the ink cartridge. The area in which the ink is not held can prevent the ink in the ink cartridge from leaking from the atmosphere communicating portion in response to changes in environmental conditions. In particular, when the seal member seals the air communication portion, the seal member has an effect of preventing the seal member from peeling off. In addition, in the usage state, this area can efficiently supply the amount of air into the cartridge as needed, and also has an effect of suppressing the negative pressure change in the inkjet cartridge. The region near the air communication portion is preferably free from ink wetting because the permeation speed of the ink itself can be further reduced, but may be a region where the ink is removed after being wetted in advance by the ink. .

In addition, the present invention is based on the above preconditions.
By providing an ink supply opening or a region where a negative pressure generator can be compressed (or compressible) by a supply tube on the side facing the partition wall forming the microcommunication portion,
The ink in the second storage chamber can secure a stable substantial ink supply path in the negative pressure generating body, and the ink supply opening is located above the microcommunication portion with respect to the lower surface of the ink cartridge. Can be listed. In the present invention, the "supply pipe"
Includes a valve structure and a connecting member attached to the cartridge and compressing and deforming the negative pressure generator, as well as an insertion tube unique to the ink jet. The effect of this arrangement relationship is that the substantial ink movement direction can be made constant, and all the ink in the second storage chamber can be consumed. After this consumption, the atmosphere moves from the partition wall side to the opposing opening side. By interposing, the ink in the negative pressure generator can be consumed as a result, and the residual ink can be reduced.

In particular, with respect to the above premise, a region which is not compressed by the supply pipe of the negative pressure generator from the partition wall forming the minute communication portion toward the side facing the wall,
By providing the area compressed by the supply pipe of the negative pressure generator in this order, the above-described one-way ink supply path can be formed in the area not compressed, and the same effect can be obtained. Thus, the remaining amount of ink can be further reduced.

Therefore, the more preferable invention of the present invention can satisfy the three configurations listed above,
Of course, it can be understood that the above-mentioned configurations alone or a combination of any two configurations can obtain excellent effects.

On the other hand, in the ink jet cartridge of the present invention, the operator's finger is touched, but normally, the inconvenience is unlikely to occur, but if a strong pressure is applied, the size of the storage chamber for storing only the ink is large. Although it depends, it is easy to deform. Therefore, as a configuration that solves the problem caused by the external pressure, it is preferable to provide a partition plate that opens a gap larger than the partition wall that forms the minute communication portion in the ink-only chamber. From the viewpoint of deformation, when these cartridges are made of resin, the wall thickness Ti of the ink containing chamber is 0.8 mm (point G in FIG. 20) or more,
It is preferable that the wall thickness Ts of the storage chamber that stores the sponge or the like as the negative pressure generating member is 1.3 mm (point J in FIG. 20) or more. Furthermore, it has been found that the wall thickness Ts is more preferably 1.2 times or more and 3 times or less the wall thickness Ti.

As the ink jet printer of the present invention, in accordance with mounting of the above-mentioned cartridge of the present invention, ink is automatically or instructed to be discharged from the inside of the cartridge by suction or ejection by a suction means through a head. That is, since the ink state in the negative pressure generating body can be corrected before printing, the original function of the cartridge can be used without being affected by the state of the cartridge left unattended.

In the method for manufacturing the cartridge of the present invention, the minute communicating portion is formed between the lid member and the partition wall by fixing the lid member for housing the negative pressure generating member in the recess of the housing chamber to the main body. Since the negative pressure generating member in the vicinity of the minute communication portion can be stabilized, the mass production is excellent and the stability of the performance is ensured.

The height of the minute communication part to the partition wall is
Larger than the average pore diameter of the negative pressure generating member (preferably the average pore diameter in the vicinity of the minute communication portion) (practically 0.1 mm or more), 5
mm or less is suitable. If more stability is expected, 3 mm or less is preferable. Further, the ratio of the volume of the storage chamber of the negative pressure generating member to the volume of the storage chamber of only ink can be set in the range of 1: 1 or more and 1: 3 or less as the practically optimum range.

The effects and characteristics of other inventions according to the present invention can be understood from the following embodiments.

[0029]

An embodiment of the present invention will be described with reference to the drawings.

1 to 6 house a negative pressure generating member.
At the same time, it was equipped with an atmosphere communication part to obtain communication with the atmosphere.
The first storage chamber communicates with the first storage chamber, but is substantially
Directly collects ink to be supplied to the first storage chamber in a sealed state
In addition to the prerequisite structure having a second storage chamber for storing,
A minute communication portion 8 that connects the first storage chamber and the second storage chamber is constructed.
This is an example of a configuration in which an opening for ink supply is provided on the side surface of the first storage chamber facing the partition wall 5 to be formed.

FIG. 1 is a schematic perspective view showing a part of the ink container of the first embodiment in a cutaway manner, and FIG. 2 is a schematic sectional view of the first embodiment.

As shown in FIGS. 1 and 2, in the ink cartridge main body 1 of this embodiment, an opening 2 for connecting with an ink jet recording head is provided with a gap 8 as a minute communicating portion.
The negative pressure generating member accommodating portion 4 that has the negative pressure generating member 3 and is adjacent to the negative pressure generating member accommodating portion via the partition wall 5 and communicates with the ink cartridge bottom portion 11. An ink container 6 for storing only ink.

With this configuration, the atmosphere is supplied from the opening 2, but what is important is that the ink in the ink containing section 6 is only passed through the communicating section 8 as compared with the configuration of the atmosphere communicating section. That is, the ink is reliably supplied to the opening 2 side along the ink cartridge bottom 11. With the supply of the ink, the atmosphere replaces the ink in the ink storage unit 6 and is replenished.

Here, a state in which the negative pressure generating member in the region near the opening of the negative pressure generating member accommodating portion 4 that can be compressed and deformed by the supply pipe is compressed and deformed by the supply pipe will be described. FIG. 3 shows that the joint member 7 as a supply pipe for supplying ink to the ink jet recording head is inserted into the replaceable ink cartridge of the present invention, and the ink jet recording apparatus can be operated by pressing against the negative pressure generating member. It is a schematic sectional view at the time. In some cases, a filter is provided at the end of the joint member to remove dust in the ink cartridge.

When the ink jet recording apparatus operates, ink is ejected from the orifice of the ink jet recording head, and an ink suction force is generated in the replaceable ink cartridge. By this suction force, the ink 9 is separated from the ink container 6 by the gap 8 between the end of the partition wall and the bottom 11 of the ink cartridge.
Through the negative pressure generating member 3 to the ink jet recording head. As a result, the pressure inside the ink container 6 that is closed except for the gap 8 is reduced, and a pressure difference is generated between the ink container 6 and the negative pressure generating member container 4. When the recording is continued, the pressure difference continues to rise, but since the negative pressure generating member is opened to the atmosphere by the gap 12 between the joint member and the joint opening, air passes through the negative pressure generating member. The ink enters the ink container 4 through a gap 8 between the end 8 of the partition wall and the bottom 11 of the ink cartridge. At this point, the ink container 6 and the negative pressure generating member container 4
Is eliminated. This operation is repeated during ink jet recording, and a certain negative pressure is obtained in the ink cartridge. In addition, since almost all of the ink in the ink storage unit can be used except for the ink that adheres to the wall surface in the ink storage unit, the ink use efficiency is improved.

At the time of non-recording, a capillary force of the negative pressure generating member itself (or a meniscus force at the ink-negative pressure generating member interface) is generated, and in particular, when the ink of the ink in the ink containing portion starts to be consumed. The ink holding state in the negative pressure generating member storage portion is substantially constant, and the gas collected in the ink storage portion is in a substantially negative pressure state, so that the pressure balance in the cartridge is extremely stable, and ink jet recording Prevents ink from leaking from the head.

Therefore, if the negative pressure generating member is selected according to the ink jet recording head to be jointed and the ratio between the negative pressure generating member accommodating portion and the ink accommodating portion is designed, the configuration shown in FIG.

As shown in FIGS. 19 (A) and 19 (B), the ink of each color (for example, four colors of black, yellow, magenta, and cyan) is used to make the exchangeable ink cartridge of the present invention compatible with a color ink jet recording apparatus. Can be housed in individual replaceable ink cartridges and used. Further, as shown in FIG. 19A, an individual ink cartridge may be integrated into a single unit to form a replaceable ink cartridge, or as shown in FIG. 19B, a replaceable ink cartridge for frequently used black ink. A replaceable ink cartridge may be provided in which the replaceable ink cartridge for one color ink is separated from the replaceable ink cartridge. These combinations are arbitrary according to the ink jet device.

In the exchangeable ink cartridge of the present invention, in order to control the negative pressure in the ink jet recording head, not only the negative pressure generating member 3 is selected, the shape and the dimension thereof, but also the shape, the dimension, and the end portion of the partition wall 5, The shape and size of the gap 8 between the partition wall end portion 8 and the ink cartridge bottom portion 11,
The volume ratio of the negative pressure generating member accommodating part 4 and the ink accommodating part 6, the insertion amount of the joint member 7 into the exchangeable ink cartridge, the shape, the size, the shape and size of the filter 12, the roughness of the eyes, the surface tension of the ink, etc. It is more preferable to optimize according to the conditions used.

As the negative pressure generating member used in the present invention, a conventionally known member can be used as long as it has the ability to retain the ink itself against the own weight of the liquid (ink) and a slight vibration. For example, a flocculent body in which fibers are meshed into a mesh or a porous body having a communication hole can be used. A sponge such as a polyurethane foam whose ink holding power and negative pressure generation are easily adjusted is preferable. In particular, a foam is preferable because it can be adjusted to a desired porosity during foam production. When the foam is further subjected to a heat compression treatment to further adjust the porous density, a decomposed product is generated by heating, which may change the physical properties of the ink and adversely affect the recording quality. Become. Also, in order to manufacture an exchangeable ink cartridge corresponding to various ink jet recording apparatuses, a foam having a corresponding porous density is required, but a specific number of cells not subjected to thermal compression (the number of holes per inch) It is preferable to cut a foam material having a desired size into a desired size, and compression-insert it into a negative pressure generating member accommodating portion to adjust the porosity and the capillary force.

In the above example, the joint member 7 and the joint opening 2 are provided with a gap to take in the atmosphere from the outside of the ink cartridge, but the present invention is not limited to this and the joint member and the joint opening portion. Any structure and shape may be used.
When the negative pressure generating member is a porous member such as a sponge, as shown in FIGS. 3A and 3B, the insertion of the joint member prevents the porous member from escaping from the bottom of the ink cartridge, and The end of the joint member 7 preferably has an arbitrary angle (taper) with respect to the insertion direction of the joint member in order to maintain and secure the pressure contact surface between the filter portion and the negative pressure generating member. When the insertion amount of the joint member is excessively large, the tapered portion at the tip may cause a crack in the negative pressure generating member. Therefore, a surface structure as shown in FIG.

Further, it is conceivable that the outer wall of the joint member is provided with irregularities for introducing the atmosphere so as to serve as an inlet for the atmosphere, but as shown in FIG. 5, the shape of the opening 2 is also a groove (see FIG. 5).
(A)) and the like, that is, FIG.
It is possible to select such that FIG. 5 (c) is a triangle. Preferably, the shape of the opening 2 is such that a gap is provided so as not to seal the joint member and the opening, or the opening 2 is located close to the outer periphery of the joint member at the lower part (bottom side of the ink cartridge) and is opened at the upper part of the opening. Shape.

As described above, the replaceable ink cartridge according to the embodiment of the present invention can serve as both the joint opening and the portion for taking in the atmosphere, and can have a simpler structure. The amount of insertion of the joint member 7 into the replaceable ink cartridge does not cause ink leakage at the time of insertion in consideration of the shape of the joint member, the negative pressure generating member, the shape of the ink cartridge, and the like. It is preferable to set the compression area of the negative pressure generating member so as not to cause the above.

In contrast to the above embodiment, providing a communication hole to the atmosphere in addition to the joint opening on the side of the negative pressure generating member accommodating portion means that the negative pressure generating member region of the present invention that does not hold ink is formed. It is also effective for adopting the configuration provided in the vicinity of the atmosphere communicating portion, and is a suitable means for improving the reliability against environmental changes in the inkjet recording apparatus described later.

The shape and size of the gap 8 between the end of the partition wall and the bottom of the ink cartridge are arbitrary, but if it is too narrow, the meniscus force with the ink will be strong and ink leakage from the joint opening can be suppressed. In addition, a force is required to supply ink to the negative pressure generating member accommodating portion, and ink may run out during use. If the width is too large, the opposite phenomenon may occur. Therefore, the height of the minute communication portion to the partition wall is larger than the average hole diameter of the negative pressure generating member (preferably, the average hole diameter near the minute communication portion). (Practically 0.1 mm or more) and 5 mm or less are suitable. If more stability is expected, 3 mm or less is preferable. FIG.
Shows an example of the shape of the gap 8. FIG. 7A shows the most stable constructional shape for the present invention, which is used in the previous embodiment, and is provided at a constant height over the entire width of the cartridge. FIGS. 7B and 7C show a case where the communicating portion is formed in only a part of the entire width of the cartridge and meanders. This configuration is effective when the overall volume of the cartridge is large, but is usually used low in a printer. FIG. 7D has a plurality of tunnel-shaped communication portions, and the ink can easily move toward the inner surface of the cartridge, and the gas introduction for gas-ink exchange can be centralized. FIGS. 7E and 7F show a configuration in which a concave portion is formed in the partition wall on the ink storage chamber side in the vertical direction in addition to the configuration of FIG. 7A. Therefore, the gas reaching the lower end of the partition wall is relatively effectively introduced into the ink storage chamber in the concave portion, and the gas collection efficiency can be improved.

Incidentally, it is a more preferable condition to determine the gap 8 in consideration of the position of the joint opening. 6 (a) and 6 (b), (a)
Is at a position where the end of the partition wall is lower than the lower end of the joint opening, and the ink held in the negative pressure generating member is lower than the lower end of the joint opening, which is advantageous in suppressing ink leakage. On the other hand, in (b), the end of the partition wall is higher than the lower end of the joint opening, and the ink held in the negative pressure generating member is higher than the lower end of the joint opening. The effect is small and not preferable. Therefore, designing the size of the gap 8 such that the position of the end of the partition wall is the same as or lower than the lower end of the joint opening has an advantage that the effect of the present invention can be further stabilized. Although it depends on the shape and dimensions of the replacement ink cartridge, it can be put to practical use by selecting the height of the gap 8 from the maximum range of 0.1 mm or more and 20 mm or less, more preferably 0.5 to 5 mm. It is about. Further, the shape of the end of the partition wall may be any shape as long as the position with respect to the above-described joint opening is taken into consideration. ).

Furthermore, various structural relationships can be considered at the boundary between the end of the partition wall 5 and the negative pressure generating member 3. This is shown in FIG. 9 (a) to 9 (d)
Since the negative pressure generating member is not compressed by the end of the partition wall and the density of the negative pressure generating member is not locally increased, the flow of ink and the flow of air become relatively quick, and high-speed printing and It is preferable for color recording. On the other hand, FIGS. 9E and 9F show that although the negative pressure generating member 3 is compressed by the end of the partition wall and the density of the member is increased, resistance to the flow of ink and the flow of air is generated. Obstacles such as ink leakage can be suppressed against environmental fluctuations.
Therefore, these selections may be designed in consideration of the type of the inkjet recording apparatus and the environmental conditions to be used.

The volume ratio of the negative pressure generating member accommodating portion 4 and the ink accommodating portion 6 must be determined in consideration of the type of ink jet recording apparatus and the environmental conditions used. Also,
The relationship with the negative pressure generating member used is also important. In order to improve the use efficiency of the ink, it is preferable to increase the volume of the ink storage section. In this case, a negative pressure generating member having a high negative pressure generating force (a high compression ratio in the case of a sponge) is used. It becomes effective. Therefore, if it is noted that the negative pressure generating force of the negative pressure generating member is increased as the volume ratio of the ink storage section is increased, the volume of the storage chamber of the negative pressure generating member and the volume of the storage chamber of only the ink are reduced. The ratio is preferably in a range of 1: 1 or more and 1: 3 or less as a practically optimum range.

The shape, size, and roughness of the filter 11 can be arbitrarily set depending on the type of the ink jet recording apparatus. However, in order to prevent dust from entering from the ink cartridge and not clog the nozzle of the recording head, the orifice of the orifice is selected. It is preferable to use a filter having an eye smaller than the diameter.

The amount of ink to be filled in the replaceable ink cartridge of the present invention is arbitrary within the ink cartridge internal volume, and the ink container may be filled up to the volume limit, but immediately after opening the replaceable ink cartridge. In order to maintain the negative pressure, it is preferable that the ink filling amount in the negative pressure generating member is set to be equal to or less than the limit of the ink holding force of the negative pressure generating member. Here, the ink holding force refers to the ability of the member when the negative pressure generating member is impregnated with ink to be able to hold ink alone.

In the case of an ink cartridge having a closed ink container, the external environment changes (temperature rise or atmospheric pressure drop) when loaded in the ink jet recording apparatus.
However, there is a possibility that ink remaining in the ink storage unit is pushed out of the ink cartridge due to air expansion of the ink storage unit (there is also ink expansion), and ink leakage may occur. However, in the replaceable ink cartridge according to the present invention, the air expansion volume (including a small amount of ink expansion) of the closed system ink storage unit is predicted according to the worst-cased environmental condition, and the ink storage unit is accordingly estimated. It is preferable that the negative pressure generating member accommodating section is provided in advance with the amount of ink movement from the ink. At this time, providing an air communication hole other than the joint opening on the side of the negative pressure generating member housing portion, as shown in FIGS. 10C and 10D, generates a negative pressure from the ink chamber due to expansion of air in the ink chamber. This is very effective because the ink moved into the member can be guided to the atmosphere communication side. The installation position of the atmosphere communication hole is
There is no special designation if it is above the joint opening on the negative pressure generating member housing part side, but in order to keep the flow of ink in the negative pressure generating member from the joint opening when the environment changes, move it to a position far from the joint opening. Preferably it is. Further, the number, shape, size, and the like of the air communication holes can be arbitrarily set in consideration of the evaporation of the ink.

In the distribution of the ink cartridge alone, it is preferable to seal the joint opening and / or the air communication hole with a sealing material to prepare for evaporation of ink and air expansion in the ink cartridge. As a sealing material,
In the field of packaging, it is preferable to use a composite of a single layer barrier and several layers of plastic film, which are called a barrier material in the packaging field, and a composite material obtained by combining these with a reinforcing material such as paper or cloth, or aluminum foil. . It is more preferable that the material similar to the material of the ink cartridge body is used as the adhesive layer of the barrier material and the hermeticity is increased by welding with heat or the like.

In order to suppress the evaporation of ink from the ink cartridge or the inflow of air from the outside atmosphere, after the ink cartridge is inserted, the air inside the packaging material is degassed and then sealed. It is effective if taken. As the packaging material, it is preferable to select a barrier material as in the above-mentioned sealing material, in consideration of gas permeability and liquid permeability.

By selecting the packaging form as described above, the physical distribution of the ink cartridge alone becomes extremely reliable without ink leakage.

The material of the ink cartridge body may be any material conventionally used for molded articles, but it should be selected from materials which do not affect the ink jet ink or members which are treated so as not to affect the ink. is there. It is also necessary to consider the productivity of the ink cartridge. For example, the ink cartridge body is divided into an ink cartridge bottom portion 11 and an upper portion thereof, each of which is integrally formed of a resin material. After a negative pressure generating member is inserted, the ink cartridge bottom portion 11 and an upper portion thereof are welded. Thus, the ink cartridge body can be manufactured. If a transparent or translucent resin material is selected, the ink in the ink container can be visually recognized from the outside of the ink cartridge, so that the time to replace the ink cartridge can be visually determined. Further, it is preferable to provide a convex portion in order to facilitate the welding of the sealing material and the like. Furthermore, it is also preferable in terms of design that the outer surface of the ink cartridge body is subjected to processing such as embossing.

Both the pressurizing method and the depressurizing method can be used for filling the ink. It is preferable to provide an ink filling port in any one of the tank main bodies for filling the ink, because it does not contaminate the other ink cartridge openings. The ink filling port after ink filling is preferably plugged with a plastic or metal material.

The configuration and shape of the replaceable ink cartridge can be variously modified without departing from the scope of the present invention. As described above, the replaceable ink cartridge of the present invention is a replaceable ink cartridge that maintains high reliability even during single distribution and has a simple structure and high ink use efficiency that can detect the remaining amount of ink. .

In addition, an exchangeable type that maintains a suitable negative pressure during recording and non-recording from the beginning of use to the end of use for high-speed recording and does not leak ink even under the environmental conditions of the inkjet recording apparatus. It becomes an ink cartridge.

Furthermore, the replaceable ink cartridge is easy to handle, does not leak when attached to or detached from the ink jet recording apparatus, and does not malfunction when mounted in the ink jet recording apparatus.

FIG. 11 shows a method of manufacturing an ink tank as a cartridge according to the present invention, which has a partition plate 61 described later and a wall portion which forms two recesses for storage chambers through a partition wall 5. After inserting the absorber 3 as a negative pressure generating member into the recessed portion on the side of the opening 2 with respect to the main body (diagonal section: diagonally downward left), the bottom member 11 as a lid member is inserted.
Shows the configuration integrated. FIG. 11 is a partially broken schematic view showing a state where the recording head HD is mounted on the ink tank 1. The ink tank is configured by covering a container divided into two rooms by a partition wall 5 with a flat bottom member 11 constituting the bottom of the ink tank. In this way, the same minute communication path 8 as the tip of the partition wall 5 of the container can be formed with a simple structure in which the lid is covered. In addition, the atmosphere communication part 10 is located at the upper part on the same surface as the surface on which the opening 2 is provided.

On the other hand, the head is mounted by inserting the joint portion 7 as a supply pipe into the opening of the ink tank, and the joint portion 7 has an oblique structure in which the upper portion in the drawing is forward from the lower portion. . Further, the ink flow path inside the joint has a horn structure that opens upward. With such a structure, ink from the absorber can be favorably introduced to the head side.

The ink jet recording apparatus is provided with a heating element 72 as means for generating thermal energy as energy used to eject ink from the ejection port 71 of the nozzle 73, and the state change of the ink is caused by the thermal energy. In the recording apparatus having the recording head HD of the type that causes
Further, especially for color printing, higher recording density and higher definition can be achieved.

As described above, the replaceable ink cartridge of the present invention maintains high reliability even in the case of a single physical distribution, and is a replaceable ink cartridge having a simple structure and capable of detecting the remaining amount of ink and having high ink use efficiency. Becomes

Also, a replaceable type that maintains a suitable negative pressure during recording and during non-recording and supports high-speed recording from the beginning of use to the end of use, and does not leak ink even under the environmental conditions of use of the inkjet recording apparatus. It becomes an ink cartridge.

Furthermore, the replaceable ink cartridge is easy to handle, does not leak when attached to or detached from the ink jet recording apparatus, and is a replaceable ink cartridge which does not have a mounting error operation in the ink jet recording apparatus.

Supplementally, a method of manufacturing an ink cartridge will be described. It has a negative pressure generating member storage chamber containing the above-described absorber and a communication portion 8 as a minute communication portion.
When the ink storage chamber having a substantially sealed structure in which ink is released for the first time by exchanging gas and liquid is integrally formed, ink is filled from the opening 13 of the lid member 11 on the ink storage chamber side. Thus, when the ink is filled in the ink storage chamber, the negative pressure generating member 4 itself is also supplied with ink from the minute communication portion, and the ink is supplied to a considerable area.

Here, the negative pressure generating member near the atmosphere communicating portion is made to exist as a region where ink is not applied and ink is not retained. Thereafter, the opening 13 is sealed with the ball 14 and the opening 2 and the atmosphere communication portion are in the same sealing member S.
(May be different) and sealed.

A pre-use ink jet cartridge in this state is shown in FIG. In this figure, it is assumed that ink is filled in the ink storage chamber 6.

FIG. 12 shows the ink jet cartridge 1 in the hermetically sealed state, and also shows a schematic view of a printer using the ink jet cartridge 1. In the ink jet cartridge 1, a negative pressure generator region 3A located near the atmosphere communication portion 10 is provided at an upper corner of the cartridge as a region not holding ink. The negative pressure generator region 3B located below the region 3A is a compressible region that is compressed and deformed by inserting an ink supply pipe (not shown). Negative pressure generators other than these areas 3A and 3B hold the filled ink without any other external influence. Of course, the region 3B is a region facing the ink supply tube mounting opening 2 provided on the same surface below the air communication portion 10. In addition, the opening 2 is located above the minute communication portion 8 and has all of the above-described features of the present invention.

The cartridge 1 of FIG. 12 can be used by removing the seal member S described above, but since the area 3A does not hold ink, there is no vibration or pressure change when the seal is removed. However, it does not leak ink.

In the present embodiment, regardless of the storage state or the use state of the ink cartridge, as a technical point of view that the conventional technical level is wiped out, the area near the atmosphere communicating portion of the negative pressure generating member is an area not holding ink. By doing so, it is possible to prevent the ink in the ink cartridge from leaking from the atmosphere communicating portion in response to changes in environmental conditions. In particular, when the seal member seals the air communication portion, the seal member has an effect of preventing the seal member from peeling off. Also, when in use,
In this area, the atmosphere can efficiently supply a required amount of air into the cartridge, and there is also an effect of suppressing a change in negative pressure in the ink jet cartridge. The region near the air communication portion is preferably free from ink wetting because the permeation speed of the ink itself can be further reduced, but may be a region where the ink is removed after being wetted in advance by the ink. .

In this embodiment, the ink supply opening or the ink supply opening is provided on the side facing the partition wall forming the minute communication portion.
By providing a structure in which the negative pressure generator is compressed (or compressible) by the supply pipe, the ink in the second storage chamber can secure a stable substantial ink supply path in the negative pressure generator. As a configuration for further stabilization, the ink supply opening may be positioned above the microcommunication portion with respect to the lower surface of the ink cartridge. The effect of this arrangement relation is that the ink movement direction can be substantially constant, all the ink in the second storage chamber can be consumed, and after this consumption, the air in the second storage chamber moves to the opposite opening side. By intervening, as a result, the ink inside the negative pressure generator can be consumed and the remaining ink can be reduced.

In particular, a region which is not compressed by the supply pipe of the negative pressure generator and a region which is compressed by the supply pipe of the negative pressure generator are provided from the partition wall forming the minute communication portion toward the side facing the wall. In this order, the above-mentioned one-direction ink supply path can be formed in the non-compressed region, and the same effect can be obtained, and the remaining ink amount can be further reduced by the ink securing capacity of the compressed region.

The ink jet printer of the present embodiment automatically or manually discharges ink from the inside of the cartridge by suction or ejection by the suction means via the head in response to mounting of the cartridge 1. It has a head recovery means HR. As a result, the ink state in the negative pressure generator can be corrected before printing, so that the original function of the cartridge can be used without being affected by the state of leaving the cartridge.

In FIG. 12, the tank 1 mounted on the ink jet head HB held by the scanning type carriage CR is the same as the cartridge 1 shown in FIG. In the tank 1 mounted on the carriage, the ink supply pipe of the head passes through the opening 2 to compress and deform the compressible area 3B of the negative pressure generating member 3. In this example, the negative pressure generating member 3 is deformed toward the minute communication portion 8. At this time, the mounting signal LP is output from the printer control unit CC by tank attachment / detachment detection unit (not shown because it is substituted by a known mechanical or electric detection unit).
Is input to In response to this, before the start of recording, the head recovery means HR operates to discharge the ink in the tank 1 and improve the state of the ink in the tank.

In FIG. 13A, the inner surface of the ink storage chamber of the ink jet cartridge shown in FIG. 12 is changed so that the space shape 22 is convex upward by the capacity thereof. The inner surface 20 is a curved surface that rises as the distance from the minute communication port 8 increases. The structure of the inner surface 20 supplies minute residual droplets due to the surface tension of the ink to the negative pressure generating member 3 side, and the upwardly protruding portion 21 serves as a holding portion for the operator, thereby preventing deformation of the tank during operation. I do. FIG.
3 (B) shows an oblique arrangement of the partition wall 51 for reducing the size of the negative pressure generating unit 3 storage chamber side while the ink storage chamber is large and the equivalent capacity tank is large.

FIG. 13C shows the above manufacturing method.
This is an example in which a lid member 11 forming a gap 8 with respect to a partition wall 5 is inserted and fixed between the side plates 101 and 100 of the cartridge main body. SE indicates an end of the lid member 11. In the case of FIG. 13 (C), if the adhesion and fixing vary, the distance SP of the gap 8 is not fixed. for that reason,
As shown in FIG. 13 (D), it is also preferable to position the spacers 110 in contact with the end SE of the partition wall on both sides. The spacer 110 is preferably provided on the lid member 11. Further, by providing the convex portion 30 located within the distance SP of the gap 8 on the lid member, the recoverability of the air into the ink storage portion may be enhanced.

14 (A) and 14 (B) respectively show the possible state inclination range of the print or ink supply state of the embodiment of the present invention, and 40 in the figure indicates the horizontal plane. A more preferable state for the present invention is that the microcommunication portion is located on the lower side, and ideally, it is good to be parallel to the horizontal surface 40 on the lower surface of the cartridge. However, practically, in the case of a two-chamber configuration as in this example, (A),
There is no inconvenience in using the angle θ as shown in FIG. When it is mounted on the scanning type carriage and moved, the range of 0 ≦ θ ≦ 5 degrees is preferable.

The negative pressure generating member of the above-described embodiment of the present invention may be composed of a plurality of members. However, if an interface (inter-member interface) between them occurs, the movement of the atmosphere occurs there, which is likely to cause inconvenience. In some cases, the negative pressure generating member is more preferably a single porous chamber body.

Further, the ink containing chamber can be included as a chamber for substantially containing ink as long as it contains a larger amount of ink than the negative pressure generating member containing chamber.

Here, the partition plate 61 in the ink containing chamber disclosed in the previous embodiment will be described.
The outer wall surface of the cartridge is deformed due to the load when the user grips it with the hand or the environmental conditions during distribution, causing ink to leak from the orifice of the ink jet recording head or the pressure inside the cartridge provided in a part of the cartridge. A description will be given of an embodiment capable of solving the problem that the ink leaks from the air communication port which makes the air the same as the air.

The following examples were made to solve the technical problems in the above various ink tank tank configurations, and ink leakage may occur due to external forces during handling and transportation, and environmental changes such as temperature and atmospheric pressure. It is an ink cartridge for ink jet recording which has high ink use efficiency.

FIG. 15 (A) is a perspective sectional view of an embodiment in which the side wall surface is omitted, FIG. 5 (B) is a lateral sectional view of the embodiment, and FIG. 16 is an ink supply operation of the embodiment. Explanatory drawing, Figure 1
FIG. 7 is a cross-sectional view for explaining the distortion of the side wall when a load is applied to the side wall of the embodiment.

As shown in FIGS. 15 (A) and 15 (B), the ink cartridge body 1 has an opening 2 for connecting with an ink jet recording head and an atmosphere communicating portion 10 provided above the opening 2 for taking in the atmosphere. And a negative pressure generating member accommodating portion 4 accommodating the negative pressure generating member 3 that absorbs and holds the recording ink, and an ink accommodating portion that adjoins the negative pressure generating member accommodating portion 4 via the rib 5 and accommodates the ink. It consists of 6. The ink container 6 and the negative pressure generating member container 4 communicate with each other through a gap 8 provided between the rib 5 and the bottom surface. The side walls are connected to both sides while leaving.

In FIG. 16A, the joint member 7 for supplying the ink to the ink jet recording head is inserted into the opening 2 of the ink cartridge body 1 of the embodiment and pressed against the negative pressure generating member 3 so that the ink jet recording apparatus is operated. It is a schematic cross section which shows the state which became operational. In addition, a filter may be provided at an end opening of the joint member 7 in order to remove dust in the ink cartridge.

When the ink jet recording apparatus operates, ink is ejected from the orifice of the ink jet recording head, and ink suction force is generated in the ink tank. Ink 9
The suction force causes the ink from the ink container 6 to pass through the gap 8 between the end of the rib 5 and the bottom 11 of the ink cartridge to the negative pressure generating member housing 4 and through the negative pressure generating member 3 into the joint member 7. It is drawn and supplied to the ink jet recording head. As a result, the pressure inside the ink container 6 that is closed except for the gap 8 is reduced, and the ink container 6 is closed.
And a negative pressure generating member housing 4 causes a pressure difference. When the recording is continued, the pressure difference continues to rise, but since the negative pressure generating member accommodating portion 4 is open to the atmosphere through the air communication hole 10, air is released from the negative pressure generating member as shown in FIG. 3, the ink enters the ink container 6 through the gap 8 between the rib 5 and the bottom 11 of the ink cartridge. At this point, the pressure difference between the ink storage section 6 and the negative pressure generating member storage section 4 is eliminated. This operation is repeated during ink jet recording, and a certain negative pressure is obtained in the ink cartridge. In addition, since almost all of the ink in the ink container 6 can be used except for the ink adhering to the wall surface in the ink container 6, the ink use efficiency is improved (FIG. 16C).

During non-recording, the capillary force of the negative pressure generating member 3 itself (or the meniscus force at the interface between the ink and the negative pressure generating member) is exerted to prevent ink from leaking from the ink jet recording head.

From the above functions, the cross section of FIG. 18 is shown as another embodiment according to the selection of the negative pressure generating member 3 according to the jointed ink jet recording head and the volume ratio of the negative pressure generating member accommodating portion 4 and the ink accommodating portion 6. As shown in the drawing, the ink containing portion 6 may be provided with a plurality of partition plates 61.

A structure effective as a measure for improving the strength of the side wall will be described below.

It is important for the ink cartridge to have a structure that withstands external force during hand linking, changes in the environment during distribution, and enhances ink use efficiency.

In the embodiment, the side walls 12a, 12b and 12c of the negative pressure generating member accommodating portion 4 and the ink accommodating portion 6 are configured to have the same displacement amount with respect to the external force.

For example, the cartridge material is usually a plastic mold, but as shown in FIGS. 15B and 17, the thickness of the side wall surface 12a of the negative pressure generating member accommodating portion 4 is set to the side wall surface of the ink accommodating portion 6. The partition plates (ribs) 61 are arranged between the inner surfaces of both side walls at positions such that they are thicker than the thicknesses of 12b and 12c, and the volume of the ink containing portion 6 is equally divided. The amount of wall surface deformation Δt6 for an equivalent load per area is reduced, and
Of the side wall surfaces 12b and 12c on both sides of the same. In addition, by making the deformation amount Δt4 of the negative pressure generating member accommodating portion 4 substantially equal, the object of preventing ink leakage due to deformation on the wall surface is achieved.

In the ink cartridge of the embodiment shown in FIGS. 15B and 17, the material is polypropylene (P
P), outer diameter is 48m / m length x 35m height x 1 thickness
In the case of 1 m / m, the heat of the side wall surface 12a of the negative pressure generating member housing portion 4 is 1.5 mm, the heat of the side wall surfaces 12b and 12c of the ink housing portion 6 is 1 mm, and By arranging the ribs 61 of the accommodating portion 6 at a position of about 10 mm from each wall surface, it was possible to obtain a structure in which a margin more than twice as large as a load during handling (about 2 kg) was obtained. At the same time, sufficient strength can be obtained even with respect to changes in atmospheric pressure and changes in temperature during distribution.

In the above embodiment, the number of ribs 61 of the ink containing portion 6 is one due to the size of the tank. However, the number of ribs 61 is not limited to one, and it is adjusted to the size of the ink cartridge as shown in FIG. It is possible to deal with this by changing the number and position of the ribs and the thickness of the wall surface, for example, by providing the ribs 61 at two locations.

FIG. 20 shows the relationship between the wall thickness of the negative pressure generating member accommodating portion 4, the thickness of each wall surface investigated to determine the wall thickness of the ink accommodating portion 6, and the ink leakage in the handling and distribution environment. Is data indicating.

Increasing the thickness of each wall increases the strength against ink leakage, but in order to satisfy the objective of downsizing and high ink use efficiency, the wall should be thinned as much as possible. It is necessary to increase the internal volume, and based on the data shown in FIG. 20, the side wall thickness of the negative pressure generating member accommodating portion 4 is 1.5 mm and the side wall thickness of the ink accommodating portion 6 is 1.0 mm.

According to the size of the ink cartridge, the above dimensions can be determined with reference to FIG. 20, and the outer wall thickness of the negative pressure generating member accommodating portion 4 is 1.2 to 3 times the outer wall thickness of the ink accommodating portion 6. It is preferable to configure within the range.

As described above, the present invention can provide a rational and effective cartridge as an ink jet ink cartridge in the field of ink jet printing from the idea of reversal that has not been conventionally found. Of course, the advantage of enabling miniaturization of the color printer itself, which requires a plurality of color inks, is remarkable. Further, the replacement period of the ink cartridge can be lengthened, and the operability is excellent.

[0099]

According to the present invention, the external environment changes
The ink is stored by the expansion of the air in the chamber containing the ink.
Ink is pushed out of the chamber, but the negative pressure
The negative pressure generating member can be collected from the ink chamber by providing
Large enough to accept the ink that has moved to the delivery room
It is possible to satisfactorily prevent accidental ink leakage from the air communication section.
An ink jet cartridge can be provided. Also the car
Ink that can reduce the amount of ink remaining in the cartridge as much as possible
We can provide jet cartridges,
Negative pressure is practically the majority from the beginning of use to the end of use
Interchangeable interface that can be kept almost constant and can be used for high-speed recording.
A cartridge for a jet jet can be provided. In addition,
Recovered by installing a jet cartridge
By performing the operation, the liquid in the negative pressure generating member is drawn out,
A printer that can keep the negative pressure constant from the beginning of use immediately after mounting
Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a part of an ink container according to a first embodiment of the present invention, which is cut away.

FIG. 2 is a schematic sectional view of the embodiment of FIG.

FIGS. 3 (a), (b), and (c) are explanatory views of examples of coupling between a cartridge and a supply pipe according to the present invention.

FIG. 4 is an explanatory diagram of a comparative example for explaining more preferable conditions of the present invention.

FIGS. 5A, 5B, and 5C are explanatory diagrams of an ink supply unit of the present invention.

FIGS. 6A, 6B, and 6C are explanatory diagrams illustrating a positional relationship between an ink supply unit and a minute communication unit.

FIGS. 7 (a), (b), (c), (d), (e)
(F), each is an explanatory view of a configuration of a minute communication portion.

FIGS. 8A to 8H are explanatory diagrams of the shapes of the ends of the partition walls on the side of the minute communication portion.

FIGS. 9A to 9F are explanatory views of the state of the end of the absorber near the partition wall, respectively.

FIGS. 10 (a), (b), (c) and (d) are explanatory diagrams of states inside the absorber with respect to environmental changes.

FIG. 11 is a schematic diagram for explaining the manufacturing method of the present invention and an ink jet head.

FIG. 12 is a schematic explanatory view of the ink jet cartridge of the present invention and an ink jet printer using the same.

13 (A), (B), (C) and (D) are views for explaining a modification of the main part of the present invention.

FIGS. 14A and 14B are cross-sectional views for explaining a tiltable range in a use state of the ink cartridge of the present invention.

FIGS. 15A and 15B are explanatory diagrams of a shape of an optimal embodiment of the present invention.

FIGS. 16A, 16B, and 16C are explanatory diagrams sequentially showing changes in the printing state of the present invention.

FIG. 17 is a conceptual diagram illustrating a pressure state on the outer wall of the cartridge of the present invention.

FIG. 18 is a sectional view of a modified example of the cartridge of the present invention.

FIGS. 19A and 19B are perspective views showing a color tank configuration of a cartridge embodying the present invention.

FIG. 20 is a graph showing a correlation between wall thickness and ink leakage due to external pressure deformation according to the present invention.

[Explanation of symbols]

 1 Inkjet Cartridge 2 Opening Part 3 Negative Pressure Generating Member 4 First Storage Room 6 Second Storage Room 8 Micro Communication Section 10 Atmosphere Communication Section

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Naoto Asai 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Riki Abe 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Seiichiro Karita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference JP-A-4-156339 (JP, A) JP-A-2-187364 (JP , A) JP-A-2-34353 (JP, A)

Claims (18)

(57) [Claims] 1. An inkjet device for an inkjet device.
Inkjet cartridge that can be connected to the head
The negative pressure generating member is housed and liquid is supplied to the head.
A liquid supply unit that connects to the atmosphere, and an atmosphere communication unit that establishes communication with the atmosphere,
And a communication between the first chamber and the first chamber via a communication portion provided at a position distant from the atmosphere communication portion.
A liquid which is substantially sealed except for a part and is supplied to the first chamber.
A second chamber for accommodating the body, and in front of the first chamber
The negative pressure generating member keeps the liquid near the atmosphere communication port.
An ink jet cartridge having an area that it does not have . 2. The communication portion is formed of a wall forming the first chamber.
An end and an inner wall surface that becomes a bottom when the cartridge is used,
2. The method according to claim 1, characterized in that
Ink-jet cartridge. 3. The atmosphere communicating portion is connected to the liquid supply portion.
2. It is located above and above.
Ink-jet cartridge. 4. The liquid supply section and the atmosphere communication section
Contractor characterized by having a sealing member for hermetically sealing
The ink jet cartridge according to claim 3 . 5. The negative pressure generating member near the liquid supply section,
From the liquid supply part of the supply pipe provided in the head
Has a compressible area that is compressed toward the communication part by insertion.
In addition, between the compressible area and the communication part
In between there is a region that is not compressed by the insertion of the supply pipe.
The ink jet cartridge according to claim 1, wherein the ink jet cartridge is provided. 6. The liquid supply section relates to the first chamber.
It is characterized in that it is arranged on the opposite side of the communication part.
The ink jet cartridge according to claim 3 . 7. The liquid holding member has a space between the communicating portions.
20 mm larger than the average pore size in the first chamber of
The value is within the following range.
Inkjet cartridge on board . 8. The distance between the communication portions is more preferably
Contracts characterized by a range of 0.5 mm to 5 mm
The ink jet cartridge according to claim 7 . 9. The second chamber has an opening interval of the communicating portion.
Having a stiffener formed with a larger gap than
The ink jet cartridge according to claim 2, wherein 10. The volume ratio of the first chamber and the second chamber is
It is in the range of 1: 3 to 1: 1.
The ink jet cartridge according to item 1. 11. The upper portion of the second chamber in use is
The device according to claim 1, which is expanded upward.
Ink-jet cartridge. 12. The bottom of the second chamber in use is
That it has an inclined surface that descends toward the first chamber
The ink jet cartridge according to claim 1, which is characterized in that . 13. The ink jet cartridge
Is a plurality of are integrally connected
Item 2. The inkjet cartridge according to Item 1 . 14. The ink jets integrally connected to each other.
Cartridges for yellow, cyan, and magenta
The ink according to claim 13, which contains ink.
The inkjet cartridge described. 15. The integrally connected ink jet
There are yellow, cyan, magenta,
A contract characterized by containing black ink
The ink jet cartridge according to claim 13. 16. The recording liquid container is filled with ink.
The ink jet printer according to claim 1, wherein
Recording liquid container. 17. The negative pressure generating member is a negative pressure generating member
A porous member that is compressed and accommodated in the container, which has been subjected to heat compression treatment.
The porous member is any one of
2. The recording liquid container for inkjet according to 1. 18. An ink jet printer housing a negative pressure generating member.
Liquid supply section that supplies liquid to the
A first chamber having an atmosphere communicating portion for communicating therewith;
Through the communication part provided at a position away from the communication part,
It communicates with one chamber, and is substantially sealed except for the communication part
A second chamber for storing the liquid supplied to the first chamber,
Ink cartridge for
Position it above and place the communication and liquid supply parts downward.
Ink jet that prints by mounting it
A printer for printing the cartridge.
The negative pressure generating member at least depending on the mounting
Ink jet characterized by discharging the held liquid
Printer.