JPH05254125A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To prevent an ink cartridge and an ink jet recorder from being contaminated by providing an ink supply part wherein an ink keeping material by a micropore, a slit-shaped passage for a perforated film, ink packings on both sides of the ink keeping material, and an ink tank containing the ink keeping material are provided. CONSTITUTION:When a perforated film 5 enters from one side of an ink supply part 3, it travels while it is being pinched between ink packings 1a, 1b. At that time, ink is supplied to many micro through holes provided to the film 5 from an ink keeping material 2 to fill them. Though the film 5 filled with the ink goes out from another side of the ink supply part 3, the packing 1a or 1b attracts excess ink stuck to a surface of the film 5 at that time and removes it. The ink is prevented from leaking thereby and since the keeping material 2 keeps the ink in the micropore, the keeping material 2 has an action for restraining the ink from flowing out. The ink oozed from the keeping material 2 is prevented from leaking outside with the packings 1a, 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus that prints by forming characters and figures on recording paper by ejecting ink droplets, and in particular, as a means for ejecting ink, a large number of minute penetrating elements are used. The present invention relates to an inkjet recording device using a perforated film having holes.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view showing a first example of a conventional ink jet recording apparatus, FIG. 5 is a perspective view showing a second example of a conventional ink jet recording apparatus, and FIG. 6 is an ink of the example of FIG. FIG. 7 is a plan view showing details of the cartridge, and FIG. 7 is a perspective view showing details of the inking portion of the ink cartridge of the example of FIG.

Conventionally, printers of various printing systems have been used. Among them, an ink jet recording apparatus for performing printing by ejecting ink droplets to form characters or figures on a recording sheet is known. It has the advantages of low power consumption, low noise operation, and easy miniaturization and colorization.

However, the ink jet recording apparatus has a drawback of low reliability because the problem that the nozzles for ejecting ink droplets cause clogging is not completely solved.

In order to solve such a problem, an ink jet recording apparatus as shown in FIG. 4 has been proposed.

The ink jet recording apparatus shown in FIG. 4 has a perforated film 25 having a large number of minute through holes formed by connecting both ends thereof in a ring shape, and the ink 22 in the through holes of the perforated film 25.
An ink cartridge 23 having an inking roller 21 for filling the ink and an ink tank 24 for supplying ink to the inking roller 21, and an ink 22 filled in the ink through hole arranged in contact with the back surface of the perforated film 25. And a thermal head 26 that heats the target to fly.

In the ink jet recording apparatus constructed as described above, the ink is supplied from the ink tank 24 of the ink cartridge 23 through the inking roller 21 to the through hole of the perforated film 25 and held therein. By energizing and heating the thermal head 26, the low boiling components of the ink are vaporized to generate vapor bubbles, and the pressure of the vapor bubbles causes the ink to be ejected from the through holes of the perforated film 25, and the ejected ink is minute. Characters and figures are formed by performing the printing by adhering it onto the recording paper 29 wrapped around the platen 27 arranged so as to face the perforated film 25 while maintaining such a gap.

The ink jet recording apparatus shown in FIG. 5 has an ink cartridge 33 having a perforated film 35 having a large number of minute through holes and inking portions 31a and 31b for filling the through holes of the perforated film 35 with ink.
As shown in FIG. 6, the ink cartridge 33 has an inking structure in which both ends of the perforated film 35 are fixed to the pulleys 34a and 34b, and the through holes of the perforated film 35 are filled with ink. Parts 31a and 3
1b are arranged inside the pulleys 34a and 34b, respectively, and the traveling of the perforated film 35 is guided by the guide pins 33a to 33.
The thermal head 36 is arranged so as to be in contact with the back surface of the perforated film 35 while giving a bidirectional (arrow A) rotational movement to the pulleys 34a and 34b by the f. ), And the ink filled in the through holes is selectively heated to fly. Inking part 31a (31
In the configuration of b), as shown in FIG. 7, an inking head 42 formed of a porous material is provided at the tip portion, and the inking head 42 is in contact with the back surface of the perforated film 35. .. An ink holding body 41 made of a porous material is provided adjacent to the inking head 42. The ink holder 41 contains ink and is contained in the ink tank 43. When the inking portion 31a (31b) configured as described above is in contact with the back surface of the perforated film 35, the ink is supplied from the ink holder 41 to the inking head 42, and the inking head 42 is used to supply the ink. Supply ink to.

[0009]

In the former case, the conventional ink jet recording apparatus as described above is provided at the entrance portion and the exit portion of the perforated film of the ink cartridge for supplying the ink to the perforated film. Since there is a gap, there is a drawback that ink may leak from this gap and contaminate the ink cartridge or the inkjet recording device. For this reason, since the ink cartridge must be mounted so that the ink does not leak from the ink cartridge, the mounting form of the ink cartridge is limited, and it is difficult to replace the ink cartridge.

On the other hand, in the latter case, there is a drawback in that the ink excessively contained in the inking head may leak out to cause ink leakage and contaminate the ink cartridge or the ink jet recording apparatus. Further, in order to run the perforated film after inking, a drive roller for driving the travel of the perforated film and a guide pin for guiding the travel of the perforated film must be provided in the ink cartridge. There is also a problem that the ink cartridge becomes large and the manufacturing cost rises.

[0011]

A first ink jet recording apparatus of the present invention comprises a perforated film having a large number of minute through holes and a through hole which is arranged in contact with the back surface of the perforated film. A thermal head that selectively heats and ejects the ejected ink, and an ink supply unit that fills the through holes of the perforated film with the ink, and the ink supply unit passes the perforated film. An ink holder having a slit-shaped passage for holding the ink by micropores; an ink packing having slit-shaped passages for passing the perforated film and provided on both sides of the ink holder; It has a holding body and an ink tank containing the ink packing.

A second ink jet recording apparatus of the present invention selectively selects a perforated film having a large number of minute through holes, and an ink which is arranged in contact with the back surface of the perforated film and filled in the through holes. A thermal head for heating and flying the perforated film; and an ink supply unit for filling the through holes of the perforated film with the ink. The ink supply unit reciprocally passes through the perforated film. An ink holder having a slit-shaped passage for holding ink by micropores, and an ink packing having two slit-shaped passages that reciprocally pass through the perforated film and provided outside the ink holder. A drive roller for driving the perforated film, a space for accommodating the ink holder, the ink packing, and the drive roller and holding the ink. Those having an ink tank.

[0013]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a perspective view showing the details of the ink supply section of the first embodiment of the present invention.

In FIG. 1, the ink supply unit 3 has an ink holder 2 having slit-shaped passages for passing the perforated film 5 and holding ink by micropores, and a slit-shaped member for passing the perforated film 5. Ink packings 1a and 1b each having a passage and provided on both sides of the ink holder 2;
Ink holder 2 and ink packings 1a and 1b
It has an ink tank 4 for storing the ink.

When the perforated film 5 comes in from one side of the ink supply section 3, the ink packings 1a and 1b.
Drive while being sandwiched between. At that time, the ink is supplied from the ink holder 2 into a large number of minute through holes provided in the perforated film 5 and filled. The perforated film 5 filled with ink goes out from the other side of the ink supply unit 3,
At this time, the ink packing 1a or 1b adsorbs and removes the excess ink adhering to the surface of the perforated film 5. This prevents ink leakage. Since the ink holder 2 holds the ink by the minute holes,
It has a function of suppressing the outflow of the ink, and the ink spilled from the ink holder 2 is prevented from leaking to the outside by the ink packings 1a and 1b.

FIG. 2 is a sectional view showing the details of the ink supply unit of the embodiment of FIG. 3, and FIG. 3 is a perspective view showing the second embodiment of the present invention.

In the embodiment shown in FIG. 3, the ink supply section 13 is mounted, and the ink supply section 13 is guided by guide rails 18a and 18b and is moved in the left-right direction together with the thermal head 16 and the perforated film 15 (arrow C). ), Printing is performed on the recording paper 9 mounted on the platen 7.

The ink supply unit 13 is, as shown in FIG.
A perforated film 15 having a large number of minute through holes, and a thermal head 16 disposed in contact with the back surface of the perforated film 15 for selectively heating and flying the ink filled in the through holes. The through hole of the perforated film 15 is provided with an ink tank 14, and the ink tank 14 reciprocally passes through the perforated film 15.
The ink 13 is formed by minute holes having individual slit-shaped passages.
Ink packing 11 provided on the outer side of the ink holding body 12 having two slit-shaped passages that reciprocally pass through the ink holding body 12 holding a and the perforated film 15, and the running of the perforated film 15. Has a space for accommodating the drive roller 17 for driving the ink, the ink holding body 12, the ink packing 11, and the drive roller 17, and for holding the ink 13a.

The perforated film 15 is the ink supply section 13.
When it enters the inside of the ink tank 14 through one of the openings, it is driven by the drive roller 17 and runs while being sandwiched by the ink packing 11. At this time, the perforated film 15 is given a predetermined tension by the tension roller 20 urged by the spring 19. In the ink tank 14, the perforated film 15 is filled with ink from the ink holding body 12 in a large number of minute through holes, and goes out through the other opening. At that time, the ink packing 11 is formed into a perforated film. Excess ink 13a adhering to the surface of 15 is adsorbed and removed. This prevents ink leakage.
Since the ink holding body 12 holds the ink by the minute holes, it has an action of suppressing the outflow of the ink 13a, and the ink 13a spilled out from the ink holding body 12.
Are prevented from leaking to the outside by the ink packing 11.

[0021]

As described above, the ink jet recording apparatus of the present invention has an ink holding member having slit-like passages for passing a perforated film and holding ink by minute holes, and the ink holding member passing through this perforated film. An ink supply unit having an ink packing having slit-shaped passages provided on both sides of the ink holding member and an ink tank accommodating the ink holding member and the ink packing, or reciprocating a perforated film. On the outside of the ink holding body having two slit-shaped passages for holding the ink by micropores and two slit-shaped passages for reciprocally passing through the perforated film. The ink packing provided, the drive roller for driving the perforated film, the ink holder, the ink packing, and the drive roller are housed in the ink packing. By providing an ink supply unit having an ink tank having a holding space, it is possible to prevent the ink from leaking out and contaminating the ink cartridge or the inkjet recording device, and also to freely mount the ink supply unit, This has the effect of simplifying the structure.

[Brief description of drawings]

FIG. 1 is a perspective view showing details of an ink supply unit according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing details of an ink supply unit of the embodiment of FIG.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a perspective view showing a first example of a conventional inkjet recording apparatus.

FIG. 5 is a perspective view showing a second example of a conventional inkjet recording apparatus.

FIG. 6 is a plan view showing details of the ink cartridge of the example of FIG.

7 is a perspective view showing details of an inking portion of the ink cartridge of FIG.

[Explanation of symbols]

 1a Ink packing 1b Ink packing 2 Ink retainer 3 Ink supply unit 4 Ink tank 5 Perforated film 7 Platen 9 Recording paper 11 Ink packing 12 Ink retainer 13 Ink supply unit 13a Ink 14 Ink tank 15 Perforated film 16 Thermal head 17 Drive roller 18a Guide rail 18b Guide rail 19 Spring 20 Tension roller 21 Inking roller 22 Ink 23 Ink cartridge 24 Ink tank 25 Perforated film 26 Thermal head 27 Platen 29 Recording paper 31a Inking part 31b Inking part 33 Ink cartridge 33a- 33f Guide pin 34a Pulley 34b Pulley 35 Perforated film 36 Thermal head 41 Ink holder 42 Inking head 43 Nkutanku

Claims (2)

[Claims] 1. A perforated film having a large number of minute through holes, and a thermal head which is disposed in contact with the back surface of the perforated film and selectively heats and ejects ink filled in the through holes. An ink supply unit for filling the ink into the through-holes of the perforated film, the ink supply unit having a slit-shaped passage through which the perforated film passes, and holding the ink by micropores. An ink holder, an ink packing having slit-shaped passages for passing the perforated film and provided on both sides of the ink holder, and an ink tank containing the ink holder and the ink packing. An inkjet recording device characterized by the above. 2. A perforated film having a large number of minute through holes, and a thermal head which is disposed in contact with the back surface of the perforated film and selectively heats and ejects ink filled in the through holes. An ink supply unit for filling the ink into the through holes of the perforated film, the ink supply unit reciprocatingly passing through the perforated film.
Provided on the outer side of the ink holding body having two slit-shaped passages and two slit-shaped passages that reciprocally pass through the perforated film An ink packing, a drive roller for driving the perforated film to travel, and an ink tank having a space for accommodating the ink holding member, the ink packing and the drive roller, and filling the ink. Jet recording device.