JPH05212858A - Ink jet recording apparatus - Google Patents

Abstract

PURPOSE:To prevent the clogging of through-holes and the running of ink or discontinuous missing dots by providing a first cleaning roller removing the ink remaining on a perforated film and a second cleaning roller removing a washing solution. CONSTITUTION:A first cleaning roller 1 is formed from a porous material and partially immersed in the washing solution 8a received in a washing solution supply part 8 and the ink 9a remaining on the perforated film 6 after printing passing the position of a thermal head 7 is removed by the washing solution 8a held in the cleaning roll 1. A second cleaning roller 2 is formed from a porous material and comes into contact with the perforated film 6 passing the first cleaning roller 1 to absorb and remove the washing solution 8a remaining on the perforated film 6 after the ink is washed off.

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 for performing printing by forming ink characters on a recording member by ejecting ink droplets, and more particularly to a large number of minute penetrating portions as ink ejecting means. The present invention relates to an inkjet recording device using a perforated film having holes.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing an example of a conventional ink jet recording apparatus.

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 member is known. It has advantages such as 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. 3 has been proposed.

The ink jet recording apparatus shown in FIG. 3 has a perforated film 16 having a large number of minute through holes formed by connecting both ends in a ring shape, and an inking roller 15 for filling the through holes of the perforated film 16 with ink. , Inking roller 1
5, an ink supply unit 19 for supplying ink to the ink, and a thermal head 1 arranged in contact with the back surface of the perforated film 16 to selectively heat and fly the ink filled in the through holes.
7, a driving roller 13 and a pinch roller 14 for driving the running motion of the perforated film 16, and supporting rollers 20a, 20b and 2 for guiding the running of the perforated film 16.
0c and.

In the ink jet recording apparatus constructed as described above, the ink supply section 19 is provided in the through hole of the perforated film 16.
Ink is supplied and held from the ink via the inking roller 15, and the low boiling component of the ink is vaporized by heating the ink by energizing the thermal head 17 to generate vapor bubbles. By ejecting ink from the through hole of the perforated film 16 by the pressure of, and adhering the ejected ink on the recording paper 11 arranged facing the perforated film 16 while maintaining a minute gap. Characters and figures are formed and printed.

In such a printing method, a fixed nozzle is not used, but a large number of through holes formed in the perforated film 16 are used as nozzles, and the perforated film 16 is used as the driving roller 13.
And the support roller 2 driven by the pinch roller 14.
In order to move while guiding by 0a, 20b and 20c and sequentially heat a large number of through holes formed in the perforated film 16 to eject the ink filled therein into the recording paper 11, If the density of the through holes is made smaller than the recording density, one recording point is formed by the ink droplets ejected from the plurality of through holes, so that some of the through holes cause clogging and ink Even if jetting is not possible, it does not have a large effect on the print result,
Therefore, since there is no dot omission, there is an advantage that high quality printing can be performed.

[0009]

However, in the conventional ink jet recording apparatus as described above, the ink which is not used for printing and remains on the perforated film after printing is
It has a drawback that it may cause uneven supply of ink, resulting in ink dripping. Further, when the printing operation is not performed, the ink in the perforated film evaporates and dries, which may cause clogging of the through holes and may cause discontinuous dot omission. ing.

[0010]

The ink jet recording apparatus of the present invention comprises an apertured film having a large number of minute through holes which are ring-shaped with both ends connected, and ink is filled into the through holes of the apertured film. An ink supply unit for driving, a thermal head disposed in contact with the back surface of the perforated film for selectively heating and ejecting the ink filled in the through-holes, and a traveling operation of the perforated film. A drive roller, a first cleaning roller provided in the middle of the traveling path of the perforated film to remove the ink remaining on the perforated film, and a cleaning liquid for supplying a cleaning liquid to the first cleaning roller. A supply unit and a second cleaner that removes the cleaning liquid from the perforated film that has passed through the first cleaning roller and sends the cleaning liquid to the ink supply unit. And a Gurora is obtained by forming a first cleaning roller and the second cleaning roller of a porous material.

[0011]

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

FIG. 1 is a perspective view showing an embodiment of the present invention,
2A and 2B are schematic diagrams showing the cleaning action of the perforated film in the embodiment of FIG. 1, where FIG. 2A shows the cleaning action of the first cleaning roller, and FIG. 2B shows the cleaning action of the second cleaning roller. FIG.

In the embodiment shown in FIG. 1, a perforated film 6 having a large number of minute through holes formed by connecting both ends in a ring shape, an inking roller 5 for filling the through holes of the perforated film 6 with ink, An ink supply unit 9 that supplies ink to the inking roller 5, a thermal head 7 that is disposed in contact with the back surface of the perforated film 6 and that selectively heats and ejects the ink filled in the through holes. A driving roller 3 and a pinch roller 4 for driving the perforated film 6 to travel, a support roller 10 for guiding the perforated film 6 to travel, and a perforated film 6 provided in the middle of the traveling path of the perforated film 6.
The first cleaning roller 1 for removing the ink remaining on the first cleaning roller 1, the cleaning liquid supply unit 8 for supplying the cleaning liquid to the first cleaning roller 1, and the cleaning liquid for removing the cleaning liquid from the perforated film 6 passing through the first cleaning roller 1. Ink supply unit 9
The second cleaning roller 2 is provided for feeding the sheet to the.

In the ink jet recording apparatus constructed as described above, ink is supplied from the ink supply section 9 through the inking roller 5 to the through holes of the perforated film 6 and held, and the ink is supplied to the thermal head 7. The low boiling component of the ink is vaporized by heating by energizing the ink 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 6 so that the ejected ink can form a minute gap. By holding and adhering it on the recording paper 11 arranged so as to face the perforated film 6, characters and figures are formed and printing is performed.

The first cleaning roller 1 is made of a porous material, and as shown in FIG. 2A, a part thereof is immersed in the cleaning liquid 8a contained in the cleaning liquid supply section 8. The ink 9a remaining on the perforated film 6 after printing that has passed the position of the thermal head 7 and the cleaning liquid 8a held inside are removed.

The second cleaning roller 2 is also made of a porous material and, as shown in FIG. 2B, is in contact with the perforated film 6 that has passed through the first cleaning roller 1 and is used to absorb ink. The cleaning liquid 8a remaining on the perforated film 6 after cleaning is absorbed and removed.

As a result, the perforated film 6 that has passed through the second cleaning roller 2 becomes a clean product in which neither ink nor cleaning liquid remains, so that clogging of the through holes is prevented and ink drips and discontinuous dots are formed. The occurrence of omission is prevented.

[0018]

As described above, the ink jet recording apparatus of the present invention has the following advantages:
Prevents clogging of through holes by providing a first cleaning roller for removing ink remaining on the perforated film and a second cleaning roller for removing cleaning liquid from the perforated film that has passed through the first cleaning roller. Therefore, there is an effect that it is possible to prevent ink dripping and discontinuous dot omission.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

2A and 2B are schematic diagrams showing the cleaning action of the perforated film in the embodiment of FIG. 1, wherein FIG. 2A is a diagram showing the cleaning action of the first cleaning roller, and FIG. 2B is a cleaning action of the second cleaning roller. FIG.

FIG. 3 is a perspective view showing an example of a conventional inkjet recording apparatus.

[Explanation of symbols]

 1 First Cleaning Roller 2 Second Cleaning Roller 3 Driving Roller 4 Pinch Roller 5 Inking Roller 6 Perforated Film 7 Thermal Head 8 Cleaning Liquid Supply Section 8a Cleaning Liquid 9 Ink Supply Section 9a Ink 10 Support Roller 11 Recording Paper 13 Drive Roller 14 Pinch Roller 15 Inking roller 16 Perforated film 17 Thermal head 20a, 20b, 20c Support roller

Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B41J 29/17 9012-2C B41J 3/04 103 T 8804-2C 29/00 J

Claims (2)

[Claims] 1. A perforated film having a large number of minute through holes connected to both ends in a ring shape, an ink supply unit for filling the through holes of the perforated film with ink, and a back surface of the perforated film. A thermal head for selectively heating and flying the ink filled in the through-holes, the driving roller driving the traveling operation of the perforated film, and the traveling path of the perforated film. A first cleaning roller provided on the way to remove the ink remaining on the perforated film, a cleaning liquid supply unit for supplying a cleaning liquid to the first cleaning roller, and a passage through the first cleaning roller And a second cleaning roller that removes the cleaning liquid from the perforated film and sends the cleaning liquid to the ink supply unit. Recording device. 2. The ink jet recording apparatus according to claim 1, wherein the first cleaning roller and the second cleaning roller are made of a porous material.