Fluid recording head

FIELD: printing industry.

SUBSTANCE: invention concerns fluid recording head. Fluid recording head for recording by drop ejection from multiple ejection orifices in the substrate includes multiple first ejection orifices, each for ejection of rather large volume drops; multiple second ejection orifices, each for ejection of rather small volume drops; power generation elements for drop ejection from multiple first and second ejection orifices; storage tank for fluid ejected from multiple first and second ejection orifices; at least two first fluid passages for fluid flow between fluid tank and each of the first ejection orifices; and second fluid passage for fluid flow between fluid tank and each of the second ejection orifices.

EFFECT: concordance of small and large drop ejection rates, maintenance of normal ejection mode.

13 cl, 13 dwg

 

The technical field to which the invention relates.

The present invention relates to a liquid recording head.

Prior art

Figure 10-13 presents the known inkjet recording head described in US 6830317. In the recording head shown in these drawings, many of ejection openings 100 large droplets with a relatively large amount of ejection, and multiple ejection holes 101 small droplets with a relatively small amount of ejection is formed on the same substrate. Additionally provides a common reservoir 102 for liquids that are common to all ejection holes. Many large ejection openings 100 drops and General tank 102 to determine the liquid line of the flow is one-to-one flow channel 103 for large drops, provided for each ejection orifice 100 large drops. On the other hand, many of the ejection holes 101 small drops and General tank 102 to determine the liquid line of the flow is one-to-one via a flow channel 104 for small drops, provided for each ejection hole 101 small drops. In the flow channel 103 for large drops provided by the heater 105 of large drops, which generates heat for the formation of bubbles in the liquid in Utri of the flow channel 103 for large drops, and under the action of pressure during the formation of the bubbles drop (ink drop) ejectiles from the respective ejection openings 100 large drops. Additionally, in the flow channel 104 for small droplets includes a heater 106 small drops, which generates heat for the formation of bubbles in the liquid inside the flow channel 104 for small drops, and under the action of pressure during the formation of the bubbles, the ink drop ejectiles from the respective ejection openings 101 small drops.

In addition, the recording head shown in figure 10 and 11, are similar in that the ejection openings 100 large droplets are arranged in line on one side of a common reservoir 102 for the liquid, and the ejection holes 101 small drops are placed in line on the other side of a common reservoir 102 to the liquid. However, the recording head shown in figure 10, has a constant cross-sectional shape of the flow channel 104 for small drops, while the recording head, shown at 11, is partially narrow (narrowed) cross-sectional shape of the flow channel 104 for small drops, thereby causing a large hydraulic resistance.

The recording head shown in Fig and 13, is also similar in that the ejection openings 100 large drops and ejection the haunted hole 101 small drops are located on both sides of a common reservoir 102 to the liquid. However, the recording head shown in Fig, has a constant cross-sectional shape of the flow channel 104 for small drops, while the recording head shown in Fig partly narrow (narrowed) cross-sectional shape of the flow channel 104 for small drops, thereby causing a large hydraulic resistance.

Even in one of the recording heads shown in figure 10-13, the dimensions of the ejection holes 101 small drops and the heater 106 small droplets smaller than the dimensions of the ejection orifice 100 large drops and the heater 105 of large drops. However, the distance (OH) from the surface of the substrate prior to ejection holes and the height (h) of flow channels are identical in respect of not only the ejection holes 101 small drops, but also ejection openings 100 large drops.

According to the above-described structures on the same substrate ejection openings of large droplets and small droplets can be formed simultaneously in one process of formation, so you can create high-performance recording head, which enables the realization of high speed and high quality images.

However, known of the recording head has the following problems (A) and (B).

Problem (A)

When the difference between eject the planned volume of ejection holes small droplets and ejected volume of the ejection openings of large droplets increases, it is difficult to combine the performance of ejection of both ejection holes provided that the distance (OH) from the surface of the substrate prior to ejection holes and the height (h) of the flow channel are identical relative to the ejection openings of small droplets and ejection openings of large drops. In particular, if the ejected volume of small droplets is approximately 2-3 dps (picolitre), and the ejected volume of large drops is approximately 5-6 dps, the performance of both holes for ejection is fairly consistently, when the distance (OH) is about 25 μm, and the height (h) of the flow channel is about 14 μm.However, when the amount of ejection of small droplets less than 2 dps, the difference between the values of (OH) and (h)allowing the provision of appropriate characteristics relative to the ejection openings of large drops and characteristics relative to the ejection openings of small droplets increases, so the performance of both ejection holes cannot be easily reconciled.

In particular, in the recording head of the type BTJ (bubble jet), in which the bubbles interact with atmospheric air, the bubbles in the ejection hole of the small droplets are less prone to interaction with atmospheric air in order to destabilize the state of ejection, th is would be the seal could be broken.

To resolve this problem, the scale of the pressure chamber small drops should be optimized depending on the scale during the growth of the bubbles before the formation of the drops. In particular, a small distance (OH) is an effective measure. However, to maintain the performance of ejection holes small drops at the appropriate level, when the distance (OH) just decreases, you experience the following problems:

1. In order to maintain the strength of the flow aperture forming the ejection orifice and the flow-through channels, when the distance (OH) is reduced without changing the thickness of the plate height (h) of the flow channel decreases, this increases the hydraulic resistance. As a result, while re-filling the ink from the current ejection of droplets of ink to the next ejection of droplets of ink increases, so that the upper limit frequency of the ejection decreases, which leads to poor performance. A drop of ink ejected from ejection openings of large droplets used for printing for high density print, so this problem is especially noticeable;

2. In the ejection hole of large droplets of the recording head BTJ-type bubbles are susceptible to interaction with atmospheric air, so that the process of formation of the drops into the mode, in the cat the rum on him easily affected by the asymmetry of the flow channel. For this reason, trace ejected ink droplets occurs at the site from a common reservoir for the liquid, so that part of the track is affected by the edge ejection holes. In the ink in the form of dewdrops likely deposited around the edge ejection holes. When the ink in the form of dewdrops, accumulated around the edge of the ejection openings, obstruct the drop of ink that should be ejected from the ejection openings, the direction of ejection of ink droplets deviates from a predetermined direction or normal drop is formed incorrectly, and there is a mode in which can not be normal dot printing.

Problem (B)

In the construction shown in Fig and 13, i.e. such constructions, when the ejection openings of large droplets and ejection holes small drops are placed alternately on both sides of a common reservoir for the liquid, forming bubbles for ejection of ink droplets from the ejection openings of large drops affects neighboring ejection hole small drops. As a result, the meniscus in the ejection hole small drops vibrates, so that the ejection from the ejection holes of small drops is violated with high probability.

Summary of the invention

Task this is part II of the invention is to provide a recording head for ink-jet printing, to ensure harmonization of the ejection performance of the ejection holes small droplets and ejection openings of large drops in the proper mode, even when the difference in volume between ejection ejection hole small droplets and ejection hole large droplets increases.

Another objective of the present invention is to provide a recording head for ink-jet printing, ensure the maintenance of normal ejection by storing meniscus vibration small drops at an appropriate level, even in the structure in which the ejection openings are small droplets and ejection openings of large drops are placed alternately on both sides of a common reservoir for the liquid.

According to one aspect of the present invention proposes a liquid recording head for recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing:

the set of first ejection holes, each of which is intended for relatively large ejection ejected volume;

lots of second ejection openings, each of which is intended for a relatively small ejection ejected volume;

elements for generating energy for ejection of droplets from a variety of first ejection what's holes and lots of second ejection holes;

a reservoir for storing fluid ejected from a variety of first ejection holes and a multitude of second ejection holes;

at least two first flow passage for the flow of fluid between the reservoir fluid and each of the first ejection holes; and

a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes.

According to another aspect of the present invention proposed a liquid recording head to perform a recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing:

the set of first ejection holes, each of which is intended for relatively large ejection ejected volume;

lots of second ejection openings, each of which is intended for a relatively small ejection ejected volume;

elements generating energy for ejection of droplets from a variety of first ejection holes and a multitude of second ejection holes;

a reservoir for storing fluid ejected from a variety of first ejection holes and a multitude of second ejection holes;

the first flow channel for the flow of fluid between the reservoir fluid and each of the first ejection of the holes; and

a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes;

the first flow channels for different ejection holes are connected to each other from the side, remote from the reservoir for the liquid.

In this case, the adjacent flow channels preferably can be connected to each other from the side, remote from the reservoir for the liquid.

According to an additional aspect of the present invention proposed a liquid recording head for recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing:

the set of first ejection holes, each of which is intended for relatively large ejection ejected volume;

lots of second ejection openings, each of which is intended for a relatively small ejection ejected volume;

elements generating energy for ejection of droplets from a variety of first ejection holes and a multitude of second ejection holes;

a reservoir for storing fluid ejected from a variety of first ejection holes and a multitude of second ejection holes;

the first flow channel for the flow of fluid between the reservoir fluid and each of the first ejection the x holes; and

a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes;

when this couple first flow channels are located symmetrically with respect to each of the set of first ejection holes, and one of the pair of first flow channels and the second flow channel connected to the same reservoir for the liquid, and the other of the pair of the first flow channels is connected to a reservoir for fluid, different from the one specified reservoir for the liquid.

According to the present invention it is possible to match the performance of the ejection from the ejection holes of small droplets and ejection openings of large drops in the proper mode, even when the difference in volume between ejection ejection hole small droplets and ejection hole large droplets increases. Additionally, you can simply and inexpensively implement a recording head for ink-jet printing, providing the above effect. Additionally, according to the present invention it is possible to create a recording head for ink-jet printing, ensure the maintenance of normal ejection by storing meniscus vibration small drops at an appropriate level, even in the structure in which the ejection openings are small droplets and ejection of the werste large drops are placed alternately on both sides of a common reservoir for the liquid.

Brief description of drawings

These and other objectives, features and advantages of the present invention will be more apparent from the following description of preferred embodiments with reference to the accompanying drawings, on which:

figa depicts a top view of a liquid recording head (recording head for ink-jet printing according to the invention;

fig.1b is a view in section along the line A-A' figa according to the invention;

figure 2-9 - the top, each of which shows the appropriate implementation of the recording head for ink-jet printing according to the invention;

figa, 11a, 12a, and 13a - top, each of which shows an implementation option known recording head for ink-jet printing;

Fig.10b, 11b, 12b and 13b - views in section along the line A-A' figa, line A-A' figa, line C-C' fig.12b and line C-C' fig.13b, respectively.

Detailed description of preferred embodiments of the invention

The first option exercise

On figa shows a top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 10 for inkjet printing. On fig.1b shows a section along the line A-A' figa.

In the recording head 10 on figa this option, the implementation of many of the ejection holes 3 (3a-3d) large capillaceous in line with one side of a common reservoir 2 to the liquid in the longitudinal direction of the common reservoir 2 for liquid and multiple ejection holes 4 small drops is in line with the other party tank 2 to the liquid in the longitudinal direction. Ejection holes 3 (3a-3d) of large drops are communicated with a common reservoir 2 for the fluid through the flow channels 5 (5a-5d) for large droplets, respectively. Each ejection hole 4 small drops communicates with the reservoir 2 to the fluid flowing through channel 6 for small drops.

Additionally, a flow channel 5a for large drops, providing interaction ejection holes 3a of large drops with a total tank 2 for liquid, and a flow channel 5b for large drops, providing interaction ejection holes 3b of large drops with a total reservoir 2 for the fluid connected to each other through the auxiliary flow passage 7. Similarly, a flow channel 5c for large drops, providing interaction ejection holes 3c of large drops with a total tank 2 for liquid, and a flow channel 5d for large drops, providing interaction ejection holes 3d of large drops with a total reservoir 2 for the fluid connected to each other through the auxiliary flow passage 7. That is, in relation to the ejection holes 3a of large drops, in addition to the flow passage 5a for large drops, the flow channel 5b for large drops and auxiliary flowing channel 7 serve is the quality of the flow channel for supplying ink. In addition, in respect of ejection holes 3b of large drops, in addition to the flow passage 5b for large droplet flow passage 5a for large drops and auxiliary flowing channel 7 serving as a flow channel for supplying ink. The above construction is used for other flow channels for large drops, including those not shown on figa. The result is a significant decrease in the hydraulic resistance of the flow channel from a common reservoir for the fluid in each ejection hole 3 large drops in comparison with the known construction, in which there is a single flow channel for each ejection hole.

The above construction allows to maintain the hydraulic resistance of the flow channel from a common reservoir for the fluid in each ejection hole 3 large drops within the specified range, when the distance (OH) and height (h) decreases, as shown in fig.1b.

Therefore, in this embodiment, the recording head 10, the hydraulic resistance of the ejection holes 3 large drops can be reduced to a low level and to maintain within the specified limits, even when the distance (OH) decrease to properly maintain the performance of the ejection ejection otverstia small drops, while additionally reducing the amount of ejection ejection holes 4 small drops. As a result, the time re-filling can be short, to the upper limit frequency of the ejection can be maintained at a high level, and through this it was possible to maintain high performance.

In known constructions, where one flow channel provided for each ink ejection openings of large drops, the flow channel is sealed on the back side of the flow channel for ink (on the side opposite (remote) from a common reservoir for the liquid), so clearly observed asymmetry of the flow channel for the ink in the direction of the flow channel. In the recording head of this variant implementation of the flow-through channel for the ink flow passage 5 for large drops) is connected with the adjacent flow channel 5 for large drops on the back side, so that each of the flow channels 5 for large drops is translated into a state of blockage and has good symmetry. For this reason, even when the distance (OH) are further reduced symmetry of the flow channel for ejection holes 3 large drops relative to the direction of the flow channel can be kept optimal. Therefore, the trace of ejected droplets does not occur on the parcel to the total cut is rvwrou 2 for liquid asymmetric way, thereby avoiding contact with the ejection hole 3 large drops, so that the ink in the form of dewdrops are unable to settle around the area near the ejection hole 3. The result can be excluded the occurrence of such defects, in which the direction of ejection of ink droplets deviates from a predefined direction, in which the main droplet cannot be normally formed, which leads to the impossibility dot print.

The type of ejection of ink droplets from the ejection holes 3 large drops attached as described above, can be roughly classified into types (a) and (b). Here the type ejection matches the type of the control means of generating energy ejection (for example, a heater), corresponding to each of the ejection holes 3 large drops.

(a) After a drop of ink ejectives of two adjacent ejection holes 3 large drops connected via a flow channel, a drop of ink ejectives from another ejection holes 3 large drops with time lag.

(b) depending on the print data, the time from the ejection of ink droplets from one of the two adjacent ejection holes 3 ink droplets connected by a flow channel, to the ejection of ink droplets from the other ejection holes 3 capricorni, changes.

As for the type (a), the effect of mitigating the phenomenon of mutual interference between the United ejection holes 3 large drops due to the deviation (shift) of the time of ejection of droplets of ink ejected from the United ejection holes 3 large droplets from each other. When the number of the multiple ejection holes 3 large droplets connected by flow channels 5 for large drops (and the auxiliary flowing channel 7), is equal to n, and the time required for ejection of droplets of ink from all of the United many of the ejection holes 3 large drops, equal to t, the time differential ejection preferably may be about equal to t/n.

In an optimal embodiment, the operation of re-filling the ink in relation to one or more of the United (two adjacent ejection holes 3 large drops is performed after the ink drop ejectives from this ejection holes 3 large drops, and then a drop of ink ejectives from another ejection holes 3 large drops. However, in this case, the time from the ejection of droplets of ink from all of the ejection holes 3 large drops up until the surgery re-filling is not completed, is extended so that it is preferable that the difference between the time of casting between the United sectionname holes 3 large drops fell within this range, to the phenomenon of interference was not a problem.

As for the type (b), the leakage power in the formation of bubbles in case of simultaneous ejection of droplets of ink from both the United ejection holes 3 large droplets smaller than in the case of ejection of droplets of ink from only one of the United ejection holes 3 large drops. Therefore, the ejection energy applied to the ink drops may be increased so that you can increase the amount of ejection. In other words, by changing the time of ejection from the United ejection holes 3 large drops can adjust the amount of ejection.

As described above, according to the present invention, even if the distance (OH) decrease to properly maintain the performance of ejection from the ejection holes of small droplets by reducing the amount of ejection from the ejection holes small drops, the upper limit frequency of the ejection from the ejection holes of large drops can be maintained at a high level and it is possible to satisfactorily maintain the symmetry of the flow channel for the ink. As a result, it can support the high performance and optimum ejection. Additionally, the above advantages can be realized simply and inexpensively with high accuracy.

The second option is done by the means

Figure 2 shows another variant of implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 20 for inkjet printing.

The basic construction of the recording head 20 in this embodiment is common with the recording head 10 according to the first variant implementation. Therefore, the General design is omitted from the following description. The recording head 20 according to this variant implementation differs in that it is connected to three of the flow channel 5 for large drops. More specifically, the design contains a flow channel 5a for large drops of the flow channel 3a for large drops, the flow channel 5b for large drops of the flow channel 3b for large drops and the flow-through channel 5c for large drops of the flow channel 3c for large drops, which are connected to each other through the auxiliary flow passage 7. In other words, in relation to one ejection holes 3 large drops, three large flow passage 5 for large drops and auxiliary flow passage 7 connecting the flow channels 5 for large drops, act as a flow channel for supplying ink. The above design is similar the and designs for other ejection holes of large drops. For example, a flow channel 5d for large drops for ejection holes 3d of large drops and two adjacent flow channel (not shown) for the two ejection holes of large droplets (not shown) are connected to each other through the auxiliary flow passage (not shown).

In this embodiment, the recording head 20 having the above characteristics has increased the range of regulation of the amount of ejection compared with the recording head 10 according to the first variant of implementation due to changes in the difference between the time of ejection from each of the ejection holes 3 large drops.

Additionally, when an ink droplet ejected from each ejection holes 3 large drops separately, the number of flow channels is three, so that the leakage power bubbles forming material. As a result, the ejection small. On the other hand, when ink droplets ejected from the three ejection holes 3 large drops, equipped with three flow channels 5 for large drops at the same time, leakage power and the formation of bubbles is reduced, so that the amount of ejection increases. Similarly, if the ink droplets ejected from the two ejection holes 3 large droplets ejected the number has an intermediate value.

A third option for the implementation of the ing

Figure 3 shows another variant of implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 30 for inkjet printing in this embodiment.

The basic construction of the recording head 30 in this embodiment is common with the recording head 10 according to the first variant implementation. Therefore, the General design is omitted from the following description. The recording head 30 according to this variant implementation differs in that connected all the many flow channels 5 for large drops. Figure 3 shows only the flow channels 5a-5d for large drops, but other flow channels for large drops is also connected by means of one auxiliary flow channel 7. In other words, in this embodiment, all ejection holes 3 large drops are connected to each other through the flow channels 5 and 7.

Ejection holes 3 large drops in the recording head 10 shown in figure 1, and the recording head 20, shown in figure 2, have asymmetry relative to the direction of your occupancy, excluding Central ejection holes 3 large drops of the three ejection holes 3 CR the Phnom drops in the recording head 20 (for example, ejection holes 3b of large drops in figure 2). Therefore, there is a likelihood of such exposure, in which the ejection of ink droplets is carried out at an angle. On the other hand, the recording head 30 in this embodiment has the full symmetry of all ejection holes 3 large drops relative to the direction of placement of the ejection holes 3 large drops.

The fourth option exercise

Figure 4 shows another variant implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 40 for inkjet printing in this embodiment.

The basic construction of the recording head 40 in this embodiment is common with the recording head 10 according to the first variant implementation. Therefore, the General design is omitted from the following description. In the recording head 40 according to this variant implementation of the ejection opening 3b of large drops, which is provided in the flow channel 5b for large droplets of the recording head 10, is provided in the flow channel 5c for large drops.

In other words, in the recording head 40 of this variant implementation in one of the two flow channels 5 d is I large drops, connected through the auxiliary flow channel 7, is provided by one ejection hole 3 large drops. Accordingly, the recording head 40 is similar to the recording head 10 in that two of the flow channel 5 for large drops and auxiliary flow passage 7 connecting the flow channels, act as a channel for feeding ink to one ejection holes 3 large drops. More specifically, for ejection holes 3a (figure 4) large droplets provided in the flow channel 5a for large drops, flow channels 5a and 5b for large drops and auxiliary flow passage 7 connecting these channels serve as ink supply channel. Additionally ejection holes 3b of large drops, provided in the flow channel 5c for large drops, flow channels 5c and 5d for large drops and auxiliary flow passage 7 connecting these channels serve as ink supply channel.

However, in the recording head 10 in figure 1 are two adjacent ejection holes 3 large drops are connected to each other through not only a common reservoir 2 for the liquid, but also the two flow channels 5 for large drops and auxiliary flow passage 7, while the recording head 40 according to this variant implementation of the two adjacent ejection is TVersity 3 large drops are connected to each other only through a common reservoir 2 for the liquid.

In the recording head 40 according to this variant implementation of the ejection holes 3 large droplets do not depend on each other, so that the recording head 40 has the advantage that there is virtually no mutual interference phenomenon.

The fifth option exercise

Figure 5 shows another variant implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 50 for inkjet printing in this embodiment.

The basic construction of the recording head 50 in this embodiment is common with the recording head 40 according to the fourth variant implementation. The difference is that in this embodiment, the ejection holes 3 large drops are provided in each of the auxiliary flowing channel 7 connecting the two flow passage 5 for large drops. In other words, each of the ejection holes 3 large drops are provided in the Central part of the ink supply channel. More specifically, the ejection hole 3a of large droplets is provided in the auxiliary flowing channel 7 connecting flow channels 5a and 5b for large drops. Additionally ejection opening 3b of large drops are provided in vspomogatelnm the flow channel 7, connecting flow channels 5c and 5d for large drops. Similarly, each of the ejection holes of large droplets (not shown) provided in the associated auxiliary flow channel connecting the two flow passage for large drops.

In the recording head 50 in this embodiment, all ejection holes 3 large drops are almost symmetric with respect to the placement direction, the recording head 50 has the advantage that there is less likelihood of such impact that the ejection of ink droplets is carried out at an angle.

The sixth option exercise

Figure 6 shows another variant implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 60 to inkjet printing in this embodiment.

In the recording head 60 in this embodiment, on both sides of a common reservoir 2 to the liquid ejection holes 3 large droplets and ejection holes 4 small drops are placed alternately. Two of the flow channel 5 for large drops of ink in a couple of ejection holes 3 large drops that are positioned next to, in between posted ejection hole is ment 4 small drops, connected to each other through the auxiliary flow channel 7 on one side of a common reservoir 2 for the liquid. Additionally, the auxiliary flow passage 7 connects the two flow passage for large drops with each other on the side opposite (remote) from a common reservoir 2 for liquid relative to the ejection holes 4 small drops located between the auxiliary flow channel 7 and the common reservoir 2 for the liquid.

More specifically, the flow channels 5a and 5b for large drops of ink in a couple of ejection holes 3a and 3b of large drops, which are located next to each other, while between them is ejection hole 4 small drops are connected to each other through the auxiliary flow passage 7 provided on the side opposite to the reservoir 2 for liquids, with ejection hole 4 small drops are placed between the auxiliary flow channel 7 and the common reservoir 2 for the liquid. As a result, the ink supply hole, consisting of two flow channels 5a and 5b for large drops and auxiliary flow passage 7 has a U-shape to surround the ejection hole 4a small drops. In the recording head 60 of this variant of implementation, the impact of the formation of the HSS shall Rykov on the ejection hole 3 large drops is divided into multiple flow channels in the design, in which ejection holes 3 large droplets and ejection holes 4 small drops are placed alternately on both sides of a common reservoir 2 for the liquid, so that the recording head 60 has the advantage that the impact on the adjacent ejection orifice 4 small drops.

The seventh option exercise

7 shows another variant of implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 70 for inkjet printing in this embodiment.

In the recording head 70 of this variant implementation of the auxiliary flow channels 7 are provided on both sides of a common reservoir 2 to the liquid in the recording head 6, are connected to each other on each side, so that all ejection holes 3 large drops are connected to each other.

In the recording head 70 in this embodiment, all ejection holes 3 large drops are completely symmetric with respect to the placement direction, the recording head 70 has the advantage that less probability of exposure at which ejection of ink droplets is carried out at an angle.

The eighth option exercise

On Fig shows another variant implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 80 for inkjet printing in this embodiment.

In the recording head 80 of this case for two common reservoir 2a and 2b for liquid provided on the same substrate 81. On both sides of one of the common tanks for liquids (in this case, the total tank 2a for liquids) are only ejection openings of large drops, and on both sides of the other common reservoir 2b for liquids are only ejection holes 4 small drops.

Each of the ejection holes 3 large drops interacts with a total tank 2a for fluid through the flow channel 5 for large drops. Additionally, two of the flow channel 5 for large drops in bringing together the pair of ejection holes of large drops with a total reservoir 2 for the fluid connected to each other through the auxiliary flow channel 7.

On the other hand, each of the ejection holes 4 small drops interacts with a common reservoir 2b for fluid flowing through independent channel 6 small the APEL.

The recording head 80 according to this variant implementation has the advantage that a large droplet and a small droplet can be used for different colors.

The ninth option exercise

Figure 9 shows another variant implementation of the recording head for ink-jet printing. This is a partially enlarged schematic top view illustrating the ejection orifice flow channels and a common reservoir for liquid in the recording head 90 for inkjet printing in this embodiment.

In the recording head 90 of this variant implementation, there are two flow passage 5 for large drops, which are symmetric with respect to the ejection holes 3 large drops. Additionally on the same substrate, a plurality of common 2 tanks for liquids. One of the common 2 tanks for liquid connected to one of a pair of flow channels 5 for large drops and the flow channel 6 small drops together with other common reservoir 2 for liquids, as well as the other flow channel 5 for large drops.

In the recording head 90 according to this variant implementation of the settling of the ink in the form of dewdrops next to the ejection holes 3 are not permitted due to the symmetric two flow channels 5 for large drops. As a result, it is possible to avoid the disadvantages in the direction of ejection of ink droplets deviates from a predetermined direction, and what is wrong is formed by the main droplet, which leads to the impossibility dot print. Additionally, a pair of flow channels 5 for large drops connected with various common tanks for liquid so that the recording head 90 is the preferred framework for dealing with the phenomenon of interference.

The present invention is also applicable to the respective combinations of the above embodiments.

Although the invention is described with reference to the structures disclosed herein, it is not limited to the described details, and this application is intended to cover such modifications or changes, which can be in terms of improvements or the scope of the attached claims.

1. A liquid recording head for recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing
the set of first ejection holes, each of which is intended for relatively large ejection volume;
lots of second ejection openings, each of which is intended for a relatively small ejection amount;
elements generating energy for ejection of droplets from a variety of first ejection holes and a multitude of second ejection holes;
reservoirs store the liquid ejected from a variety of first ejection holes or sets of second ejection holes;
at least two first flow passage for the flow of fluid between the reservoir fluid and each of the first ejection holes; and
a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes.

2. The head according to claim 1, characterized in that the storage tank for the liquid ejected from the first ejection hole, and a storage tank for the liquid ejected from the second ejection openings, is placed in one reservoir for the liquid.

3. The head according to claim 2, characterized in that the first flow channel formed on one side of a reservoir for fluid and a second flow channel formed on the other side of the reservoir for the liquid.

4. The head according to claim 2, characterized in that the first flow channel and the second flow channel formed on one side of the reservoir for the liquid.

5. The head according to claim 4, characterized in that the first flow channel and the second flow channel are interleaved.

6. The head according to claim 1, characterized in that the storage tank for the liquid ejected from the first ejection hole, and a storage tank for the liquid ejected from the second ejection holes provided in the individual is reservoir for the liquid.

7. A liquid recording head for recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing
the set of first ejection holes, each of which is intended for relatively large ejection volume;
lots of second ejection openings, each of which is intended for a relatively small ejection amount;
elements generating energy for ejection of droplets from a variety of first ejection holes and a multitude of second ejection holes;
a reservoir for storing fluid ejected from a variety of first ejection holes or sets of second ejection holes;
the first flow channel for the flow of fluid between the reservoir fluid and each of the first ejection holes; and
a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes;
the first flow channels for different ejection holes are connected to each other from the side, remote from the reservoir for the liquid.

8. A liquid recording head for recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing
the set of first ejection holes, each of which is intended for erectiletesticle large volume;
lots of second ejection openings, each of which is intended for a relatively small ejection amount;
elements generating energy for ejection of droplets from a variety of first ejection holes and a multitude of second ejection holes;
a reservoir for storing fluid ejected from a variety of first ejection holes or sets of second ejection holes;
the first flow channel for the flow of fluid between the reservoir fluid and each of the first ejection holes; and
a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes;
at the same time the first flow channels are connected to each other from the side, remote from the reservoir for the liquid.

9. The head according to claim 7, wherein all of the first flow channels are connected to each other.

10. The head according to claim 7, characterized in that the time of ejection of droplets from a variety of first ejection holes differ from each other.

11. Head of claim 10, wherein, when the number of the first ejection holes is n, and the time of ejection of droplets from all of the many first ejection holes n, is equal to t, the difference of time between the ejection of the droplets is equal to t/n.

12. The head according to claim 1, characterized in that only one of the second flow is the analy provided for each of the multiple ejection holes.

13. A liquid recording head for recording by ejection of droplets from a variety of ejection holes formed on the substrate, containing
the set of first ejection holes, each of which is intended for relatively large ejection volume;
lots of second ejection openings, each of which is intended for a relatively small ejection amount;
elements generating energy for ejection of droplets from a variety of first ejection holes and a multitude of second ejection holes;
a reservoir for storing fluid ejected from a variety of first ejection holes or sets of second ejection holes;
the first flow channel for the flow of fluid between the reservoir fluid and each of the first ejection holes; and
a second flow channel for the flow of fluid between the reservoir fluid and each of the second ejection holes;
when this couple first flow channels are placed symmetrically with respect to each of the set of first ejection holes, and one of the pair of first flow channels and the second flow channel connected to the same reservoir for the liquid, and the other of the pair of the first flow channels is connected to a reservoir for fluid, different from this reservoir for the liquid.



 

Same patents:

FIELD: mechanics.

SUBSTANCE: proposed fluid ejection device incorporates heating cells comprising the first stock of heating cells and second stock of heating cells, the first address generator designed to generate signal in response to the control signal for selective sequence of the first address signals used to activate the first stock of heating cells and to generate the second address signals to activate the second stock of heating cells. Note here that the second sequence of signals is sent irrespective of the first one. The control signals are received and in response to the control signals the first sequence of the first address signals is selectively sent out to activate the first stock of heating cells and then the second sequence is sent to activate the second stock of heating cells. Note here that for selective transmission control pulses in one of the control signals are received, along with the sequence of the sync pulses in the control signals. Note here that to initiate the first and second sequences, the control signals are duly processed.

EFFECT: higher speed and quality of printing.

20 cl, 20 dwg

FIELD: technological processes; printing industry.

SUBSTANCE: device for ejection of fluid medium contains multiple activating cells, activation bus bar arranged with the possibility of energy signal reception and generator of address intended for formation of address signals sequence. Address generator contains shift register, which has double-stage cells designed for reception of input signal and storage of input signal, and logical elements that are intended for reception of input signals during every address time slot and formation of address signals sequence. Energy signal represents pulse of energy during every address time slot in sequence of address time slots for excitation of selected permitted activating cells. Unit of printing head is suggested that contains controller for generation of set of signals, in preset configuration, the first bus bar for passage of the first pulses, the second bus bar for passage of the second pulses, the first group of resistors and the second group of resistors, which are connected with the possibility to conduct on the basis of mentioned set of signals and pu;se signals.

EFFECT: device provides specific height of printing strip and makes it possible to retain costs.

22 cl, 27 dwg

FIELD: printing.

SUBSTANCE: invention relates to a substrate for jet printing head, printing head and jet printing device. The said substrate with electrical heat converters intended for generation of heat required for releasing the ink incorporates a logic circuit to generate a unit selection signal to select the said converters in separate units proceeding from the voltage amplitude first level input signal and the element excitation signal for excitation of every electrical heat converter in the selected unit at the second voltage amplitude level exceeding the first one, and the excitation circuit intended for every electrical heat converter to excite the said converters in separate units proceeding from the unit selection and element selection signals of the second level of voltage amplitude, the said signals coming from the logic circuit. The method of controlling the excitation of electrical heat converters incorporates feeding the voltage amplitude first level input signal allowing for the input signal, the unit selection signal to select the unit of electrical heat converters in separate units and the element excitation signal to excite every electrical heat converter in the selected unit at the second level of the voltage amplitude exceeding that of the first one, and exciting the electrical heat converters in separate units allowing for the unit selection and element selection signals of the second voltage amplitude level coming from the logic circuit, the above functions are realised by exciting the excitation circuit designed for every electrical heat converter. The jet printing head contains outlets for ink and the substrate supporting the electrical heat converters arranged in compliance with outlets. The jet printing head cartridge carries a jet printing head and a cup filled with ink to be fed into the printing head. The jet printing device has outlets to let out the ink and a substrate whereon installed are electrical heat converters arranged in compliance with outlets. The circuit design is developed wherein the logic excitation voltage is converted into the voltage of elements excitation without increase in the length of segments in direction perpendicular to the direction of the matrix of segments. Annual output of finished products is increased and circuitry is simplified by reducing the circuit of pulse-amplitude modulation and the number of elements on the substrate.

EFFECT: increased annual output and simplified circuitry.

12 cl, 12 dwg

FIELD: engineering of stream printing devices containing printing head assembly, receiving signals for activating drop generators for selective discharge of ink.

SUBSTANCE: device for controlling operation of drop generators is made so, that only one of them is enabled at one time moment. Device for controlling operation of drop generators is made with possible generation of signal of address and first resolution signal before excitation current for first drop generator and second resolution signal before excitation current for second drop generator.

EFFECT: prevented cross interferences on liquid during simultaneous discharge of drops from closely positioned drop generators.

2 cl, 11 dwg

FIELD: engineering of jet printing devices.

SUBSTANCE: device contains jet printing head, having a set of electric contacts: address contacts and resolution contacts for unblocking drop generators 42, and excitation currents contacts for feeding excitation currents for enabling drop generators for selective discharge of ink from them. Generated in printing device are periodic signals of address (A(1-13)) and signals of resolution (E(1-2)) for contacts of address and resolution on printing head. Also, fed selectively from printing device are excitation currents (P(1-16)) to perform generation of images on print carrier. Each individual heating element 44 is controlled by excitation circuit, containing three field transistors 48,50,52. Under effect of first and second signals, E(1) and E(2), and address signal A(1), switching device 48 selectively switches on for letting current through heating element 44, in case if excitation current is received from excitation source P(1).

EFFECT: decreased number of contacts between printing head and printing device, high quality of printing due to provision of possible positioning of large amount of drop generators in printing heads.

4 cl, 11 dwg

FIELD: jet printers.

SUBSTANCE: device has to be jet-printing head. Printing head has many drop generators reacting to excitation current and address signals; printing head is used for releasing ink. Jets printing head has first and second drop generators disposed in printing head. Any drop generator is made for reception excitation current from excitation current source. Any drop generator is made for reception of address signals from common address source. Jet printing head also has switching unit connected between common address source and any drop generator. Switching device is made for reaction to resolution signals for selective application of address signal for either first or second drop generator.

EFFECT: high speed of printing.

21 cl, 11 dwg

FIELD: jet printing, in particular, narrow-film jet printing head having control circuits on field transistors configured so as to compensate for the parasitic resistance of supply routes.

SUBSTANCE: the narrow jet printing head (100A) has effective control circuits on field transistors, which are configured so as to compensate for the parasitic resistances of the supply routes (86a, 86b, 86c, 86d). In addition, the jet printing head has ground buses, which overlap the active areas of the control circuits on field resistors.

EFFECT: provided compactness of the head at a large number of drop formers.

21 cl, 15 dwg

FIELD: printers.

SUBSTANCE: printer has ink cartridge, carriage where ink cartridge is installed, and printing head mounted onto carriage. Ink cartridge has case for placing ink, ink supplying department where hole for feeding ink is formed, memory unit for storing data on ink in case, contact outputs unit disposed onto second side wall of case and connected with memory unit. Hole for supplying ink is disposed onto first side wall of case. Cartridge has fitting element protruding from second side wall of case for correct installation of ink cartridge relatively printer at the moment when ink cartridge is placed into printer. Precise connection of ink's output unit and printer's output unit is provided. Higher degree of freedom is provided at installation of ink cartridge's contact output unit.

EFFECT: improved efficiency of operation.

28 cl, 16 dwg

FIELD: ink jet printers.

SUBSTANCE: method includes precipitating resistive layer and conductive layer on insulated substrate, forming a resistive heating element, forming of insulating barrier layer above contour of said conductive layer, forming of gap in said barrier layer, forming of metallic layer being in electrical contact with said conductive layer contour through said gap, having geometry, which opens predetermined portion of said contour of conductive layer, making a layout from metallic layer from said contour of conductive layer through said gap in insulating barrier layer to adjacent portion of said insulated substrate, so that layout from metallic layer on said adjacent portion of said insulating substrate forms a relatively large and flat area, remote from said conductive layer contour, for forming displaced spring contact. After precipitation of resistive layer and conductive layer on insulating substrate, contour of conductive layer is formed first, having a recess, forming later said resistive heating element, and then contour of resistive layer is formed with overlapping of conductive layer contour for value, exceeding precision of combination during lithography process and error of dimensions during etching of resistive layer.

EFFECT: higher quality, higher reliability, higher efficiency.

2 cl, 10 dwg

Inkjet printhead // 2229388
The invention relates to the technique of inkjet printing and can be used in inkjet printers and other printing devices

FIELD: ink jet printers.

SUBSTANCE: method includes precipitating resistive layer and conductive layer on insulated substrate, forming a resistive heating element, forming of insulating barrier layer above contour of said conductive layer, forming of gap in said barrier layer, forming of metallic layer being in electrical contact with said conductive layer contour through said gap, having geometry, which opens predetermined portion of said contour of conductive layer, making a layout from metallic layer from said contour of conductive layer through said gap in insulating barrier layer to adjacent portion of said insulated substrate, so that layout from metallic layer on said adjacent portion of said insulating substrate forms a relatively large and flat area, remote from said conductive layer contour, for forming displaced spring contact. After precipitation of resistive layer and conductive layer on insulating substrate, contour of conductive layer is formed first, having a recess, forming later said resistive heating element, and then contour of resistive layer is formed with overlapping of conductive layer contour for value, exceeding precision of combination during lithography process and error of dimensions during etching of resistive layer.

EFFECT: higher quality, higher reliability, higher efficiency.

2 cl, 10 dwg

FIELD: printers.

SUBSTANCE: printer has ink cartridge, carriage where ink cartridge is installed, and printing head mounted onto carriage. Ink cartridge has case for placing ink, ink supplying department where hole for feeding ink is formed, memory unit for storing data on ink in case, contact outputs unit disposed onto second side wall of case and connected with memory unit. Hole for supplying ink is disposed onto first side wall of case. Cartridge has fitting element protruding from second side wall of case for correct installation of ink cartridge relatively printer at the moment when ink cartridge is placed into printer. Precise connection of ink's output unit and printer's output unit is provided. Higher degree of freedom is provided at installation of ink cartridge's contact output unit.

EFFECT: improved efficiency of operation.

28 cl, 16 dwg

FIELD: jet printing, in particular, narrow-film jet printing head having control circuits on field transistors configured so as to compensate for the parasitic resistance of supply routes.

SUBSTANCE: the narrow jet printing head (100A) has effective control circuits on field transistors, which are configured so as to compensate for the parasitic resistances of the supply routes (86a, 86b, 86c, 86d). In addition, the jet printing head has ground buses, which overlap the active areas of the control circuits on field resistors.

EFFECT: provided compactness of the head at a large number of drop formers.

21 cl, 15 dwg

FIELD: jet printers.

SUBSTANCE: device has to be jet-printing head. Printing head has many drop generators reacting to excitation current and address signals; printing head is used for releasing ink. Jets printing head has first and second drop generators disposed in printing head. Any drop generator is made for reception excitation current from excitation current source. Any drop generator is made for reception of address signals from common address source. Jet printing head also has switching unit connected between common address source and any drop generator. Switching device is made for reaction to resolution signals for selective application of address signal for either first or second drop generator.

EFFECT: high speed of printing.

21 cl, 11 dwg

FIELD: engineering of jet printing devices.

SUBSTANCE: device contains jet printing head, having a set of electric contacts: address contacts and resolution contacts for unblocking drop generators 42, and excitation currents contacts for feeding excitation currents for enabling drop generators for selective discharge of ink from them. Generated in printing device are periodic signals of address (A(1-13)) and signals of resolution (E(1-2)) for contacts of address and resolution on printing head. Also, fed selectively from printing device are excitation currents (P(1-16)) to perform generation of images on print carrier. Each individual heating element 44 is controlled by excitation circuit, containing three field transistors 48,50,52. Under effect of first and second signals, E(1) and E(2), and address signal A(1), switching device 48 selectively switches on for letting current through heating element 44, in case if excitation current is received from excitation source P(1).

EFFECT: decreased number of contacts between printing head and printing device, high quality of printing due to provision of possible positioning of large amount of drop generators in printing heads.

4 cl, 11 dwg

FIELD: engineering of stream printing devices containing printing head assembly, receiving signals for activating drop generators for selective discharge of ink.

SUBSTANCE: device for controlling operation of drop generators is made so, that only one of them is enabled at one time moment. Device for controlling operation of drop generators is made with possible generation of signal of address and first resolution signal before excitation current for first drop generator and second resolution signal before excitation current for second drop generator.

EFFECT: prevented cross interferences on liquid during simultaneous discharge of drops from closely positioned drop generators.

2 cl, 11 dwg

FIELD: printing.

SUBSTANCE: invention relates to a substrate for jet printing head, printing head and jet printing device. The said substrate with electrical heat converters intended for generation of heat required for releasing the ink incorporates a logic circuit to generate a unit selection signal to select the said converters in separate units proceeding from the voltage amplitude first level input signal and the element excitation signal for excitation of every electrical heat converter in the selected unit at the second voltage amplitude level exceeding the first one, and the excitation circuit intended for every electrical heat converter to excite the said converters in separate units proceeding from the unit selection and element selection signals of the second level of voltage amplitude, the said signals coming from the logic circuit. The method of controlling the excitation of electrical heat converters incorporates feeding the voltage amplitude first level input signal allowing for the input signal, the unit selection signal to select the unit of electrical heat converters in separate units and the element excitation signal to excite every electrical heat converter in the selected unit at the second level of the voltage amplitude exceeding that of the first one, and exciting the electrical heat converters in separate units allowing for the unit selection and element selection signals of the second voltage amplitude level coming from the logic circuit, the above functions are realised by exciting the excitation circuit designed for every electrical heat converter. The jet printing head contains outlets for ink and the substrate supporting the electrical heat converters arranged in compliance with outlets. The jet printing head cartridge carries a jet printing head and a cup filled with ink to be fed into the printing head. The jet printing device has outlets to let out the ink and a substrate whereon installed are electrical heat converters arranged in compliance with outlets. The circuit design is developed wherein the logic excitation voltage is converted into the voltage of elements excitation without increase in the length of segments in direction perpendicular to the direction of the matrix of segments. Annual output of finished products is increased and circuitry is simplified by reducing the circuit of pulse-amplitude modulation and the number of elements on the substrate.

EFFECT: increased annual output and simplified circuitry.

12 cl, 12 dwg

FIELD: technological processes; printing industry.

SUBSTANCE: device for ejection of fluid medium contains multiple activating cells, activation bus bar arranged with the possibility of energy signal reception and generator of address intended for formation of address signals sequence. Address generator contains shift register, which has double-stage cells designed for reception of input signal and storage of input signal, and logical elements that are intended for reception of input signals during every address time slot and formation of address signals sequence. Energy signal represents pulse of energy during every address time slot in sequence of address time slots for excitation of selected permitted activating cells. Unit of printing head is suggested that contains controller for generation of set of signals, in preset configuration, the first bus bar for passage of the first pulses, the second bus bar for passage of the second pulses, the first group of resistors and the second group of resistors, which are connected with the possibility to conduct on the basis of mentioned set of signals and pu;se signals.

EFFECT: device provides specific height of printing strip and makes it possible to retain costs.

22 cl, 27 dwg

FIELD: mechanics.

SUBSTANCE: proposed fluid ejection device incorporates heating cells comprising the first stock of heating cells and second stock of heating cells, the first address generator designed to generate signal in response to the control signal for selective sequence of the first address signals used to activate the first stock of heating cells and to generate the second address signals to activate the second stock of heating cells. Note here that the second sequence of signals is sent irrespective of the first one. The control signals are received and in response to the control signals the first sequence of the first address signals is selectively sent out to activate the first stock of heating cells and then the second sequence is sent to activate the second stock of heating cells. Note here that for selective transmission control pulses in one of the control signals are received, along with the sequence of the sync pulses in the control signals. Note here that to initiate the first and second sequences, the control signals are duly processed.

EFFECT: higher speed and quality of printing.

20 cl, 20 dwg

FIELD: printing industry.

SUBSTANCE: invention concerns fluid recording head. Fluid recording head for recording by drop ejection from multiple ejection orifices in the substrate includes multiple first ejection orifices, each for ejection of rather large volume drops; multiple second ejection orifices, each for ejection of rather small volume drops; power generation elements for drop ejection from multiple first and second ejection orifices; storage tank for fluid ejected from multiple first and second ejection orifices; at least two first fluid passages for fluid flow between fluid tank and each of the first ejection orifices; and second fluid passage for fluid flow between fluid tank and each of the second ejection orifices.

EFFECT: concordance of small and large drop ejection rates, maintenance of normal ejection mode.

13 cl, 13 dwg

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