Head for jet printing device

FIELD: printing industry.

SUBSTANCE: head for jet printing device comprises base, having inlet channel for ink, ejection outlet hole to eject ink supplied through inlet channel, flow area, which provides for fluid medium communication between inlet channel and ejection outlet hole. Additionally flow area includes the first flow formed near base and the second flow formed along the first flow at side opposite to base relative to the first flow. Width of the first flow differs from width of the second flow in plane of section perpendicular to direction of ink flow. Besides, between the first flow and the second flow there is a stepped section.

EFFECT: invention provides for structural design of head, in which channels are suitable in resistance to flow of ink, have satisfactory thickness of side walls, making it possible for neighbouring channels to eject various amounts of ink.

7 cl, 19 dwg

 

The technical field to which the invention relates

The present invention relates to a head for ink-jet printing device, in particular for the design of channels for the ink in the head for ink-jet printing device, which directs the ink from the common backup camera for ink heads for ink-jet printing device to the nozzles for ink ejection head for ink-jet printing device.

Prior art

Head for ink-jet printing device has channels for ink, which directs the ink from the common backup camera for ink heads for ink-jet printing device to the nozzles for ink ejection head for ink-jet printing device. In a conventional head for an inkjet printer (the inkjet head printing device in accordance with the prior art) all channels for ink of the same height (Japanese patent application No. 10-235855). Thus, if inkjet printing is constructed so that its nozzles for ejection of ink is performed by a nonlinear way, for example, stepwise, on the basis of the direction in which the completed nozzle channels for ink are different in length. This difference in length of the channels for ink sometimes violates way affects the execution of the ink ejection head for ink-jet printing device and/or makes two neighboring nozzles to eject ink of different amount of ink which they emit. Therefore, the conventional inkjet head printing device must be designed so that each of its channels for ink was optimal ow resistance in order to do all nozzles for ejection of ink equal in performing the ejection of ink.

In recent years, inkjet printer began to be used for printing photographic images, and so head for ink-jet printing device continuously increases its density of nozzles to eject the ink, while the surface of the head for ink-jet printing device, which has openings of nozzles, remains limited in size. Thus, to make the multiple channels for the ink of the type indicated above is equal to the resistance of flow, head for inkjet printing devices were designed so that channels for ink were made of different cross-section; however, when they support the same height, they are different in width.

To make different width channels for ink, which are directly connected with one with nozzles to eject the ink, which is made with high density, it is necessary to reduce the thickness (the size based on the direction in which nozzles for ejection che the Nile aligned) wall channels for ink (11-14). The reduction of the walls of the channels for ink thickness reduces the size of the contact area between each wall and the base, on which is formed a channel for the ink, therefore, making it possible that when the wall is subjected to the pressure of the ejected ink, the walls are separated from the substrate, and separating the walls of this nozzle to eject the ink causes reduced pressure ejected ink adjacent the nozzle to eject the ink.

The solution of the problems described above is to limit the width of each channel for the ink to maintain the side walls of each channel for the ink sufficiently thick to withstand the pressure that is generated for the ejected ink, and the increase of the height of each channel for the ink to compensate for the width limit. However, this solution creates the following problem. Because each channel for ink directly connected with the corresponding nozzle to eject the ink by increasing the channel for ink height, increase the distance between the hole of the respective nozzles to eject the ink, and means (element generating energy to eject ink, and an increase in this distance changes the number of ejected ink from a nozzle to eject the ink. Therefore, in order to make all of the nozzles to eject the black is l head for ink-jet printing device is equal to the number of ejected ink, making a longer channel for ink at a higher height than the shorter channels for the ink, it is necessary to perform the regulation, reducing the thickness of the metering orifice (element, which constitutes the side wall of the nozzle to eject the ink and the side and top walls of the channel for ink).

However, the change in thickness of the measuring diaphragm affects the strength of the measuring diaphragm. Thus, if there is that a plate with holes formed from the resin, there arises a problem in that, if it be maintained in contact with the ink for a long time, it is deformed (swells). As one of the examples of technological solutions to this problem, known head for ink-jet printing device disclosed in patent No. 6561632 USA. As shown in Fig, in the case of this head for ink-jet printing device channels 101 and 102 for ink, which are different in length, selected by resistance to the flow of ink, making them different in cross-sectional dimension, making them different in width. However, this arrangement enables the problem, consisting in the fact that it does not work if each channel for ink is not provided with its own backup camera for ink. This creates a problem associated with the manufacture of heads for ink-jet printing device, C is with the exception of the base, in which form the inlet for ink, not reducing in thickness, it is impossible to accurately form form multiple backup camera for ink, one for each channel for ink.

In addition, according Pig in the case of a head for ink-jet printing device in which adjacent two channels for ink are at the same distance from the back of the camera for the ink, but the corresponding nozzles to eject ink of different sizes of cross-sections, being so different in amount of ejected ink channel of the ink, which is connected with a nozzle for ejection of ink that is greater than the number of ejected ink, must be greater than the width, because he must submit to the nozzle to eject the ink, a greater amount of ink than the amount of ink supplied to the nozzle to eject the ink that is connected to another channel for ink. This creates the following problem. That is, in the case of a head for ink-jet printing device, the channels for the ink, which are comparable to high density to increase the width of the channel for the ink, which is connected with a nozzle for ejection of ink, a large number of ejected ink channel of the ink, which is connected with a nozzle for ejection of ink, which is of a smaller number of release is the most ink, must be reduced in width. This creates a problem in that a narrower channel for ink sometimes fail to provide the appropriate nozzle for the ejection of ink sufficient amount of ink that is sometimes it is insufficient in terms of frequency of refill ink. In addition, in the case of head design inkjet printing device shown in Fig, in which channels for ink, one United with one of the nozzles to eject the ink, which are a smaller amount of ejected ink, are narrower than the channels for ink, one United with one of the nozzles to eject the ink, which are large in amount of ejected ink, it is impossible to ensure that the walls of the channels for the ink will be satisfactorily thick. In order to solve the problem, the channels for the ink must be limited in width, making it difficult to provide a reliable device, inkjet printing, nozzle to eject the ink which is made with high density.

Disclosure of invention

The present invention has been made due to the above-described problems, and therefore, the main objective of the present invention is to provide a constructive implementation of the channel for the ink, which allows the inkjet head is echafaudage device, which is satisfactory for the thickness of the side walls of each of its channels for the ink, and channels for inks which are suitable for the flow resistance of the ink in which the flow resistance of the ink in each channel for ink corresponds to the number of ejected ink corresponding nozzle to eject the ink. Another objective of the present invention is to provide a method of manufacturing a printhead for an inkjet printing device having the above construction. In other words, the main objective of the present invention is to provide such constructive building a head for ink-jet printing device, which can solve the above problems to head for ink-jet printing device in which adjacent two channels for the ink are different in amount of ejected ink through the nozzles to eject the ink, which are directly connected with two channels for ink one with one, and head for ink-jet printing device in which adjacent two channels for the ink are different in length, i.e. the distance from the back of the camera for the ink to nozzles for ejection of ink.

According to the object of the present invention, the printhead for an inkjet printer that contains the basics of the tion, with the inlet channel for ink; ejection outlet to eject ink supplied through the aforementioned inlet port; section of duct, which delivers the message to a fluid between the said inlet channel and said ejection outlet; in which the said duct section includes the nearby area, which is adjacent to said base, and a remote portion which is remote from the said base, and the width of the adjacent site is different from the width of a distant land on a section plane perpendicular to the direction of flow of ink, and in which between the surrounding site and remote site is provided with a stepped section.

The following preferred embodiments of the present invention provide the ability to match the flow resistance of each of the channels for the ink heads for ink-jet printing device in which two neighboring nozzles to eject the ink are different in amount of ejected ink, or head for ink-jet printing device in which adjacent two channels for the ink are different in length, or differences (the number by which the nozzle to eject the ink ejects ink nozzles to eject the ink that is j is carried out directly in connection with the channel for the ink. Therefore, they allow for reliable head for ink-jet printing device, the channels for the ink which is made with high density. In other words, they allow the head for ink-jet printing device in which not only the flow resistance of each channel for the ink corresponds to the length of the channel for the ink and the number of ejected ink nozzles to eject the ink, which is directly in connection with the channel for the ink, but also the side walls of each nozzle of the ink is thick enough to withstand the pressure generated to eject the ink.

These and other objectives, features and advantages of the present invention will become more apparent upon consideration of the following description of preferred embodiments of the present invention, taken in conjunction with the attached drawings.

Brief description of drawings

Figure 1 - a through image at the top of the head for ink-jet printing device in the first embodiment of the present invention, showing the nozzle to eject the ink and the channels for ink heads for ink-jet printing device.

Figure 2 is a view in section of a head for ink-jet printing device in figure 1, in the plane a-a' in figure 1.

Figure 3 is a view in section heads and inkjet printing device in figure 1, in the plane B-B' in figure 1.

4 is a view in section of a head for ink-jet printing device in figure 1, in the plane C-C' in figure 1.

Figure 5(a)-(d) - types in the context of molds for the next two sections of the channel for the ink heads for ink-jet printing device in the first embodiment of the present invention in various stages of production channels for the ink heads for ink-jet printing device.

6 is a cross-cutting the image at the top of the head for ink-jet printing device in the second embodiment of the present invention, showing the holes of nozzles for ink ejection head for ink-jet printing device, and the appropriate channels for ink heads for ink-jet printing device.

Fig.7 is a view in section of a head for ink-jet printing device figure 6, in the plane D-D' figure 6.

Fig is a schematic view in section of one example of modification of a head for ink-jet printing device in the second embodiment.

Fig.9 is a schematic view in section of a head for ink-jet printing device in the third embodiment of the present invention, showing the adjacent two channels for ink.

Figure 10 is a schematic view in section of a head for ink-jet printing device in the fourth embodiment, nastojasih the invention, showing adjacent two channels for ink.

11 is a top view of a conventional head for an inkjet printer (inkjet printing in accordance with the previous technique), showing the adjacent two channels for the ink, which are different in length, and their neighborhood.

Fig - view in section of a head for ink-jet printing device 11, in the plane F-F' 11.

Fig - imaginary top view of a conventional head for ink-jet printing device.

Fig - view in section of a head for ink-jet printing device on Fig, in the plane G-G' Fig.

Fig is a drawing of a conventional head for ink-jet printing device.

Fig is a drawing of a conventional head for ink-jet printing device.

The best option of carrying out the invention

Further preferred embodiments of the present invention will be described with reference to the accompanying drawings. The following preferred embodiments of the present invention will be described with reference to the head for ink-jet printing device, which uses a printing method that causes the ejection of ink in the form of ink droplets, using the energy from the bubbles generated in the ink by heating the ink. However, options for implementation are not intended to limit the volume of infusion is his invention.

1 an implementation option

Figure 1 represents a through image at the top of the head for ink-jet printing device in the first embodiment of the present invention and showing the nozzle to eject the ink and the appropriate channels for ink heads for ink-jet printing device. Figure 2 is a view in section of a head for ink-jet printing device shown in figure 1, in the plane a-a' (which is perpendicular to the feed direction of the ink) in figure 1, and Figure 3 is a view in section of a head for ink-jet printing device shown in figure 1, in the plane of the In-In' (which is parallel to the feed direction of the ink) in figure 1. Figure 4 is a view in section of a head for ink-jet printing device shown in figure 1, in the plane C-C' (which is perpendicular to the feed direction), figure 1.

As shown in Fig.1-4, head for ink-jet printing device in this embodiment has many energy-producing elements 14 (heaters) as a means of generating energy; the base 2, which has a backup camera 1 for ink; and plate 3 (called a plate with holes) to form channels for the ink associated with the top surface of the base 2. Forming channels aisle is for ink plate 3 is a member for education: many cameras 4 formation of bubbles (liquid chambers), are the heaters, one for one; many nozzles 5 to eject the ink, which is connected to the camera 4 the formation of bubbles, one for one, and through which emitted performing printing liquid droplets (liquid droplets of the ink); and multiple channels 6 for ink, which connect backup camera 1 to the ink chamber 4 the formation of bubbles, one on one. As shown in figure 1, the inkjet head printing device so designed that the camera of the formation of bubbles, which are the heater, and a nozzle 5 for the ejection of ink is performed in a stepped configuration. More specifically, the head for ink-jet printing device in this embodiment has many relatively long channels for ink and lots of relatively short channels for the ink, and they are made so that the longer a channel for ink and a short channel for ink are arranged alternately on the basis of the direction perpendicular to the channels for ink.

Figure 1 shows four cameras 4 air bubbles that are in connection with four nozzles 5 to eject the ink, one for one. However, the real head for ink-jet printing device has a lot more than four cameras 4 air bubbles, which are made in stupen the ATA configuration in the horizontal direction of the drawing. Although not shown in figure 1, backup camera 1 for ink is on the opposite side of the channel 6 to the ink from the nozzles 5 to eject the ink. The hole backup camera 1 for ink is long and narrow side channel for ink and continues in the direction roughly parallel to the line a-a' in figure 1.

Each channel 6 for ink in this embodiment has a so-called two-tier structure; it consists of a first section 6A, which is in contact with the upper surface of the base 2, and the second section 6B, which is located on top of the first section 6A.

Additionally, the camera 4 the formation of bubbles, which lead to the nozzles 5 to eject the ink, one for one, through the appropriate channels 6 for ink made in a stepped configuration. Thus, two neighboring channel 6 for ink different in length. In General, the longer the channel 6 to the ink (which will hereinafter be referred as a long channel for ink) is larger flow resistance than a shorter channel 6 for ink (which will hereinafter be referred to as short channel for ink). Thus, in order to equalize the adjacent two channels for the ink, which are different in length, the number of ejected ink from a nozzle to eject ernil, United with him, and during the period of time required for recharging, long channel for ink should be larger in cross section than the short channel for ink.

Therefore, in this embodiment, in the adjacent two channels 6 to ink the first section 6A of the long channel 6 for ink perform with as far as possible a greater width within the range in which to provide the specified distance L between the first section 6A of the long channel 6 to the ink chamber 4 of the formation of bubbles, which is in connection with a short channel for ink (Figure 2). More specifically, the width of the first section 6A of the long channel to the ink in this embodiment is 8 μm. Setting distance L (W) is the distance that is necessary for the side walls 7 of each channel for the ink, which should be thick enough to provide between side walls 7 and the base 2, the contact area is large enough to prevent separation of the side walls 7 of the base 2 by the pressure generated to eject the ink. In addition, if the extension of the first section 6A of the long channel for the ink is not enough to make a long channel for ink as large in cross-section, as is desirable, the second section 6B of the long channel for the ink, the which is at the top of section 6A of the long channel for the ink, expand to compensate for the difference of the long channel for the ink of the desired size and size achievable extension of the first section 6A.

More specifically, as shown in figure 4, the adjacent two channels for the ink, that is, a short channel for ink and one long channel for the ink are the same height as the areas 6A and 6B. However, the width of the first section 6A of the long channel for more ink than the width of the first section 6A of the short channel for the ink, and the width of the second section 6B of the long channel for more ink than the width of the first section 6A of the same long channel for ink. Incidentally, in this embodiment, the width of the second section 6B of the short channel of the ink is smaller than the first section 6A of the same short channel for ink. In other words, a relatively long channel for ink is wider on the opposite side from the substrate than on a side of the base, whereas the relatively shorter channel for ink is narrower on the opposite side from the base 2 than on the side of the base. Also in this embodiment, there is a step at the boundary between the first and second plot 6A and 6B each channel for ink. The application of this design-build can provide each channel for ink sufficient strength and ensures that even if the channels for ink made with high density, the side walls of each channel for ink remain glued to the base 2. In addition, in this embodiment, the inkjet head printing device so designed that the side walls of the first and second sections 6A and 6B of each channel for ink perpendicular to the base 2. However, this constructive building is not intended to limit the scope of the present invention. Thus, the present invention is applicable to the head for ink-jet printing device in which the side walls of the channels for ink tilted relative to the base as effectively as in the head for ink-jet printing device in which the side walls of the channels of the ink is perpendicular to the base. In the case of a head for ink-jet printing device, it is desirable that the side walls of each channel for ink were tilted so that the greater the distance from the base, the smaller the width of each channel for the ink, taking into account the efficiency of ink.

Then a method of manufacturing a printhead for an inkjet printing device in this embodiment, in particular section of the channel for the ink heads for ink-jet printing device will be described in relation to the adjacent two channels for ink. Figure 5(a)-(d) represent the species in the sections of the molds for the neighboring jet, the x channel for ink in the head for ink-jet printing device in the first embodiment of the present invention for ink-jet printing device printing.

First, as shown in Figure 5(a), the layer 8 for the formation of the mold 13 to the first section 6A of channels for ink was formed on the base 2, on which the heaters (not shown) and a semiconductor circuit for supplying heater power, covering the base 2 material for the layer 8. As the material for the layer 8 (molds 13) used ODUR1010 (product of Tokyo Ooka Kogyo, Co., Ltd.). The thickness of the layer 8 was 14 μm.

Then, as shown in Figure 5(b), the layer 9 for formation of a mold 11 for the second parcel 6B channels for ink was formed on the coating layer 8 layer 8 material for the layer 9. As the material for the layer 9 (molds 11) used a PMMA (polymethylmethacrylate). The thickness of the layer 9 was 5 μm.

Then, as shown in Figure 5(c), the layer 9 was exposed using camouflage cover 10, with the figure for the formation of molds 11 (Figure 4), using photolithography way, and was formed by the formation of mold 11 for the second parcel 6B channels for ink. During this phase, the light used to expose the layer 9 was filtered to remove wavelengths used to expose the layer 8. Additionally, to prevent the dissolution of the mold 11 during the creation of the layer 8 for the formation of the first sections 6A channels for ink, which was made later of the mold 11 was heated to 150°C.

Then, as shown in Figure 5(d), the layer 8 for the formation of molds 13 for the first parcel 6A channels for ink was exposed using masking coating 12 having a pattern formation mold 13 (Figure 4) for the first parcel 6A channels for ink using photolithography way, and was formed by the formation of molds 13 for the first parcel 6A channels for ink. During this phase, the light used to expose the layer 8 was filtered to remove wavelengths used to expose the layer 9.

Then the material for the formation of element 3 of the education channel for ink was coated on the base 2 (including molds 11 and 13), and the nozzle 5 to eject the ink were formed up, protecting the surface of the element 3 of the education channel for ink, photolithographic means (not shown). Then backup camera 1 for ink was formed in element 3 of the education channel for ink etching of the element 3 of the education channel for the ink from the back side of the element 3 of the education channel for ink. Then the protective film on the element 3 education channel for the ink has been removed. Then removed the mold 13 to the first sections 6A channels for ink and the mold 11 for the second parcel 6B channels for ink. Then item 3 of the education channel for the ink was completely from Eridan. Finally, the base 2 cut on the crystals to produce multiple separate heads for ink-jet printing device, to a process of manufacturing a head for ink-jet printing device in accordance with the present invention.

2 an implementation option

6 is an imaginary top view of a head for ink-jet printing device in the second embodiment of the present invention, in particular nozzles to eject ink, and the corresponding channel for the ink heads for ink-jet printing device. Fig.7 is a view in section of a head for ink-jet printing device, shown in Fig.6, in the plane D-D' figure 6. These drawings are used to describe this variant implementation, structural elements, similar structural elements in the first embodiment, are denoted by similar reference positions, similar to the reference positions used for similar structural elements in the first embodiment, and will not be described; it will be described only design and build components that distinguish this implementation from the first variant implementation.

As shown in Fig.6 and 7, in this embodiment, the camera 4 of the formation of bubbles, which are with is the Association with the respective nozzles 5 to eject the ink, connected by a straight line parallel to the direction in which you have nozzles to eject ink, and the adjacent two channels for ink 6 are the same length. However, two neighboring nozzles to eject ink differ in the size of their holes. Thus, a straight line of nozzles to eject the ink includes a nozzle 5A to eject the ink, which have smaller their holes, and nozzle 5B to eject the ink, which have larger their holes, and the nozzle 5 for the ejection of ink is performed so that the nozzle 5A and the nozzle 5B are placed alternately on the basis of the direction in which they are aligned. Obviously, the number, in which the nozzle 5B to eject the ink emit ink more than a number, in which the nozzle 5A to eject the ink emit ink. In other words, in this embodiment, the channel for the ink, which is in connection with a large nozzle 5B to eject the ink, more width on the opposite side from the substrate than on a side of the base, then as a channel for ink, which is in connection with a small nozzle 5B for the ejection of ink is narrower on the opposite side from the substrate than on a side of the base.

In the case of a head for ink-jet printing device of the type described above is, to provide a nozzle for ejection of ink, which is great by the number of ejected ink, a sufficient amount of ink channel 6 for ink in connection with the nozzle to eject the ink should be wider, as shown in Fig. Therefore sometimes happens that in order to prevent compensation of insufficient thickness of the side walls of the channel for the ink channel 6 for ink, in connection with nozzle 5A to eject the ink, which is smaller by the number of ejected ink, it is necessary to reduce the width.

Therefore, in this embodiment, as a countermeasure to the above problem, the adjacent two channels for ink perform the same width of the first section 6A of the channel for ink, but perform different width of the second section 6B of the channel for ink. More specifically, section 6B of the channel 6 for ink, which is connected with a nozzle for ejection of ink, which is great by the number of ejected ink is broader than section 6A of the same channel for ink. In addition, the width of the second section 6B of the channel 6 for ink, which is connected with a nozzle for ejection of ink that is greater than the number of ejected ink is greater than the second section 6B of the channel 6 for ink, which is in connection with a nozzle for webrasil the deposits of ink, which is smaller by the number of ejected ink. In addition, the width of the second section 6B of the channel 6 to the ink, in combination with a nozzle for ejection of ink, which is smaller by the number of ejected ink is narrower than the first section 6A of the same channel for ink. By the way, the adjacent two channels for ink is made equal to the height of the section 6A and the height of the plot 6B.

The design of the second sections 6B, as described above, provides the possibility that the side walls of each channel for ink remain glued to the base, and that the channel 6 to the ink, in connection with nozzle 5A to eject the ink, which is smaller by the number of ejected ink is satisfactory, based on the frequency of replenishment, even if the channels for ink located near high density. In addition, this ensures that the channel for the ink, which is in connection with a nozzle for ejection of ink, which is great by the number of ejected ink, a satisfactory quantity of ejected ink through the channel for ink. So head for ink-jet printing device in this embodiment is efficient even for high-speed printer for inkjet printing.

On Fig shown a modified ve is this head for ink-jet printing device in this embodiment. Fig represents a schematic view in section of two neighboring channels for ink, which are different in amount of ejected ink corresponding nozzles to eject the ink. In the case of the example shown in this drawing, two channels 6 for the ink are the same width and height of the plot 6A, and only the channel 6 to the ink channel of the ink on the right side on Fig), which is great by the number of ejected ink corresponding nozzle to eject the ink, provided the second section 6B, which is the top section 6A. The present invention can also be applied to this modified version of the head for ink-jet printing device shown in Fig, as effectively as it should be to head for ink-jet printing device shown in Fig.6 and 7.

3 an implementation option

Figure 9 represents a schematic view in section of two neighboring channels to the ink in the head for ink-jet printing device in the third embodiment of the present invention. In the drawing, structural elements that are the same as the similar elements in the first embodiment denoted by the same reference position, similar to the reference positions used for the description of the first variant of implementation, and this option is NT implementation will be described primarily with respect signs, which distinguish this implementation from the previous embodiments. Fig.9 corresponds to the line C-C' in figure 1.

As shown in Fig.9, in this embodiment, the adjacent two channels for different ink across the width of the first section 6A; one is wider than the other. Additionally, the width of the second section 6B of the channel for ink, the first portion 6A which is larger than the area of another channel for ink, is narrower than the first section 6A. Additionally, the width of the second section 6B of the channel 6 to the ink, the first portion 6A which is narrower than the plot of another, is wider than the first section 6A. Based on the heights of the first and second sections 6A and 6B, two channels for the ink are the same.

This arrangement is effective in the case in which the camera of the formation of bubbles, which lead to the nozzles to eject ink, one for one, performed in a stepwise pattern, as in the case of a head for ink-jet printing device which has a camera of the formation of bubbles that are closer to the reserve chamber to the ink, and the camera of the formation of bubbles, which are located farther from the reserve chamber to the ink. The advantage of this variant implementation is the same, and the first variant of implementation, which both provide a t is, what side walls of each channel for the ink is thick enough to withstand the pressure to eject the ink. In particular, in the case of a head for ink-jet printing device, shown in Figure 3, in which the second section of each channel for ink really continues in the camera of the formation of bubbles, the height of the first section 6A of the channel for ink determines the cross-sectional dimension of the channel for the ink at the point at which the channel for the ink flows into the chamber of the formation of bubbles. Therefore, a longer channel for ink, which must be larger in cross-sectional area than the shorter channel for ink, runs great width of the first section 6A, shorter than a channel for ink. Because of the loss in cross-sectional area of the short channel for ink, which follows from this extension of the first section 6A of the longer channel for ink, create compensation, expanding the second section 6B of the short channel to the ink to reduce the flow resistance of a short channel for ink.

4 an implementation option

Figure 10 represents a schematic view in section of two neighboring channels to the ink in the head for ink-jet printing device in the fourth embodiment of the present invention. In the drawing, structural elements that are the two who are the same as similar elements in the first embodiment denoted by the same reference position as the reference position used to describe the first version of the implementation, and this implementation will be described primarily with respect to the characteristics that distinguish this implementation from the previous embodiments. Figure 10 corresponds to the line C-C' in figure 1.

As shown in Figure 10, in this embodiment, the adjacent two channels for different ink across the width of the first section 6A; one wider than the other. In addition, only channel 6 for ink, the first portion 6A which is narrower than the plot of another, provided the second section 6B, which is the top section 6A. In this case, two channels for the ink are the same height as the first section 6A.

This arrangement is effective to head for ink-jet printing device in which the camera of the formation of bubbles, leading to the nozzles to eject ink, one for one, made in a stepped configuration, as in the case of a head for ink-jet printing device which has a camera of the formation of bubbles close to the back of the camera, and the camera of the formation of bubbles that are farther away from the reserve chamber to the ink. The advantage of this variant is therefore W is, as with the first embodiment, is that both ensures that the side walls of each channel for the ink is thick enough to withstand the pressure of ejected ink. In particular, in the case of a head for ink-jet printing device in this embodiment, the height of the first section 6A of the channel for ink determines the cross-sectional dimension of the channel for the ink at the point at which the channel for the ink flows into the chamber of the formation of bubbles 4, as in the third embodiment. Therefore, a longer channel for ink, which must be large in cross-sectional area than the shorter channel for ink, perform a large width of the first section 6A, shorter than a channel for ink. This extension of the first section 6A of the long channel for the ink, which ensures that the long channel for ink is satisfactory, based on the flow resistance, requires that adjacent short channel ink has been reduced in width to compensate for the loss in thickness of the side wall between the two channels for the ink. It makes a short channel for ink unsatisfactory on the basis of flow resistance; this prevents the short channel for the ink to provide the appropriate nozzle to eject the ink with sufficient cher the sludge. To cope with this situation, a short channel for the ink to provide the second section 6B. Using the above design build even head for ink-jet printing device in which the camera of the formation of bubbles is made in a stepped configuration and nozzle to eject the ink differ in the amount of ejected ink can be constructed so that each of its channels for ink was optimal resistance to flow.

In this embodiment, the second section 6B of the channel for ink, the first portion 6A which is narrower than the plot of another, is narrower than the first section 6A. However, it goes without saying that this implementation is compatible with a head for ink-jet printing device in which the second section 6B, shown in Figure 10, is wider than the first section 6A (area of base), because if the second segment 6B is wider than the first section 6A (area of base), the above effect is enhanced. Additionally, this alternative implementation is also compatible with a head for ink-jet printing device, designed so that the first section 6A, i.e. the area under the second section 6B, a channel for ink is wider than the first section 6A of the adjacent channel for ink.

In this regard, the present invention is compatible with any of the combinations of the above embodiments. In addition, each of the foregoing embodiments has been described in relation to heads of an inkjet printing device, designed so that at least one of the adjacent two channels for the ink has a first section (lower part) and the second section (the top section). However, previous versions of the implementation are not intended to limit the present invention in volume. Thus, the present invention is also applicable to the head for ink-jet printing device, the channels for the ink which have three or more levels.

Industrial applicability

As described above, according to the present invention it is possible to match the flow resistance of each of the channels for the ink heads for ink-jet printing device in which two neighboring nozzles to eject the ink are different in amount of ejected ink, or head for ink-jet printing device in which adjacent two channels for the ink are different in length, or a characteristic (the number by which the nozzle to eject the ink ejects ink nozzles to eject the ink, which is directly connected to the AC the crimson ink. Therefore, it is possible to provide a reliable head for ink-jet printing device, the channels for the ink which is made with high density. In other words, it is possible to provide a head for ink-jet printing device in which not only the flow resistance of each channel for the ink corresponds to the length of the channel for the ink and the number of ejected ink nozzles to eject the ink, which is directly in connection with the channel for the ink, but also the side walls of each nozzle of the ink is thick enough to withstand the pressure generated to eject the ink.

Although the invention has been described in relation to disclosed here designs, it is not limited worded items, and this application is intended to cover such modifications or changes that may be relevant to the purposes of the improvements or the scope of the following claims.

1. Head for an inkjet printer that contains
a base having an inlet channel for ink
ejection outlet to eject ink supplied through the mentioned inlet port,
plot duct, which delivers the message to a fluid between the said inlet channel and said ejection outlet hole is m,
these plot duct includes a first duct formed near the said base, and a second duct, which is formed along the first duct on the side opposite to the specified basis in relation to the first channel, and the width of the first duct is different from the width of the second duct in a section plane perpendicular to the direction of ink flow, and between the first duct and the second duct is provided with a stepped section.

2. The head according to claim,1 in which the width of the second duct is greater than the width of the first duct.

3. The head according to claim 1, in which the width of the second duct is smaller than the width of the first duct.

4. The head according to claim 1, containing a number of such ejection outlets and a number of such duct sections, these sections of the duct, in which the width of the second duct is greater than the width of the first duct, and the above-mentioned sections of the duct, in which the width of the second duct is smaller than the width of the first duct, arranged alternately in the direction in which are mentioned ejection outlet.

5. The head according to claim 1, containing a number of such ejection outlets and a number of such duct sections, these sections of the duct, in which the width of the first duct and the width is and the second duct are different from each other, as mentioned sections of duct in which the width of the first duct and the width of the second duct are equal to each other, are arranged alternately in the direction in which are mentioned ejection outlet.

6. The head according to claim 1, containing a number of such ejection outlets and a number of such duct sections, these sections of the duct are of different lengths, and in a relatively longer section of a duct width of the second duct is greater than the width of the first duct, and a relatively short section of a duct width of the second duct is smaller than the width of the first duct, while the relatively long sections of the duct, and a relatively shorter sections of the duct are made alternately in the direction in which you have mentioned ejection outlet.

7. The head according to claim 1, containing a number of such ejection outlets and many such sites duct, these ejection outlet have various sizes of holes in the duct sections that are in the message in a fluid medium with said ejection outlets, with a relatively large area of the holes, the width of the second duct is greater than the width of the first duct, the duct sections to the verge are reporting on the fluid with said ejection outlets, with a relatively smaller area of the holes, the width of the second duct is smaller than the width of the first duct, and the duct sections that are in the message in a fluid medium with said ejection outlets, with a relatively large area of the holes, and the duct sections, which are in fluid communication environment with said ejection outlets, with a relatively smaller area of the holes are located alternately in the direction in which are mentioned the ejection outlet.



 

Same patents:

FIELD: machine-building.

SUBSTANCE: invention related to flowing media ejection device and to the device control electrical chain. Half-conductor system contains an undercoat, which has first surface, first insulation material, located on at least the first surface segment, and first insulation material contains many holes, which forms a route to the first surface, a first conducting material, located on the first insulation material, in a way that many holes basically are free of the first conduction material, a second insulation material, located on the first conduction material and partly on the first insulation material, in a way that many holes basically are free of the second insulation material, and second conduction material, located on the second insulation material and inside of the many holes, in a way that some part of the second conduction material, located on the second insulation material, has electrical contact with the undercoat.

EFFECT: invention has higher technical requirements at manufacturing cost decrease.

60 cl, 9 dwg

FIELD: technological processes, typography.

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EFFECT: fast propulsion, without loss of accuracy and piezoelectric material settles uniformly, actuating mechanisms have same channel separation along matrix.

36 cl, 69 dwg

FIELD: production methods; jet printing.

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EFFECT: under the decreasing of the costs it is decreasing the amount of trash and increased the efficiency.

33 cl, 1 dwg

FIELD: power engineering.

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21 cl, 21 dwg

FIELD: typewriters, printing devices; drop precipitation components, drop precipitation plates with nozzles.

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13 cl, 18 dwg

FIELD: jet printing.

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20 cl, 11 dwg

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

FIELD: jet printing.

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20 cl, 11 dwg

FIELD: printing devices.

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13 cl, 18 dwg

FIELD: typewriters, printing devices; drop precipitation components, drop precipitation plates with nozzles.

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3 cl, 12 dwg

FIELD: power engineering.

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21 cl, 21 dwg

FIELD: production methods; jet printing.

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EFFECT: under the decreasing of the costs it is decreasing the amount of trash and increased the efficiency.

33 cl, 1 dwg

FIELD: technological processes, typography.

SUBSTANCE: method for making components for jet printing head consists of the following stages: making case, with upper surface, making several apertures in the indicated upper surface, passing into the case, and an actuating structure inside each of the apertures. Each actuating structure remains fixed to the body frame during operation. The actuating component for the jet printer with formation of drops under request, has a case with an upper surface, an aperture in the upper surface, passing into the case along the axis of the aperture, a convex actuating structure inside the aperture, and electrodes, which are positioned such that, they can apply a field to the actuating structure in such a way that, the actuating structure is deformed. Electrical voltages applied to the walls do not give rise to deviation of the walls and emission of drops through the nozzle.

EFFECT: fast propulsion, without loss of accuracy and piezoelectric material settles uniformly, actuating mechanisms have same channel separation along matrix.

36 cl, 69 dwg

FIELD: machine-building.

SUBSTANCE: invention related to flowing media ejection device and to the device control electrical chain. Half-conductor system contains an undercoat, which has first surface, first insulation material, located on at least the first surface segment, and first insulation material contains many holes, which forms a route to the first surface, a first conducting material, located on the first insulation material, in a way that many holes basically are free of the first conduction material, a second insulation material, located on the first conduction material and partly on the first insulation material, in a way that many holes basically are free of the second insulation material, and second conduction material, located on the second insulation material and inside of the many holes, in a way that some part of the second conduction material, located on the second insulation material, has electrical contact with the undercoat.

EFFECT: invention has higher technical requirements at manufacturing cost decrease.

60 cl, 9 dwg

FIELD: printing industry.

SUBSTANCE: head for jet printing device comprises base, having inlet channel for ink, ejection outlet hole to eject ink supplied through inlet channel, flow area, which provides for fluid medium communication between inlet channel and ejection outlet hole. Additionally flow area includes the first flow formed near base and the second flow formed along the first flow at side opposite to base relative to the first flow. Width of the first flow differs from width of the second flow in plane of section perpendicular to direction of ink flow. Besides, between the first flow and the second flow there is a stepped section.

EFFECT: invention provides for structural design of head, in which channels are suitable in resistance to flow of ink, have satisfactory thickness of side walls, making it possible for neighbouring channels to eject various amounts of ink.

7 cl, 19 dwg

FIELD: printing.

SUBSTANCE: reference element is formed of a material which contains a mixture of first resin and second resin, which structural formula is different from the first resin, and is moulded between the feeding element and the substrate of the ejecting element, so that is an integral part of the feeding element.

EFFECT: head for ejecting fluid and method of its manufacture provide the ability to compound the reference element and an element for supplying ink with high impermeability and low probability of delamination, ie with high affinity to each other.

19 cl, 17 dwg, 2 tbl

FIELD: process engineering.

SUBSTANCE: ink-jet printer ink ejection head has power supply conductor, hear conductor and excitation circuit conductor arranged to the left of ink feed port. Said conductors may be arranged using a portion of jumper located to separate feed ports. Besides, multiple feed ports are configured to feed ink and pressure chambers and separated by means of jumpers. Thus, ejection opening may be located on both sides of said feed ports. Conductor connected heater with poser supply conductor or excitation circuit is also located in jumper portion making a separation baffle for feed ports.

EFFECT: dense configuration of pressure chambers and ejection openings, optimum sizes of heaters.

12 cl, 49 dwg

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