JPS62161542A - Ink jet recording apparatus - Google Patents

Abstract

PURPOSE:To make the printing dot on recording paper hard to be scraped off, by mounting a mechanism for applying pressure to printed solid ink. CONSTITUTION:Printing paper P is fed corresponding to the reciprocal movement of a carriage 1 by a rotating platen 3 and the ink droplet 11 emitted from a head flies corresponding to the recording signal sent to a recording apparatus to be adhered to the printing paper P wound around the platen 3. Because the ink droplet 11 has low head capacity and is solidified after the heat thereof is immediately taken by the printing paper P, each printing dot 12 adhered to the printing paper P forms a semispherical shape. When pressure is applied to said printing dot 12 using a roller 6, the printing dot 13 after pressure bonding is embedded in the printing paper P and the semispherical projection shape becomes flat. Because the solid ink is embedded in recording paper and the projection becomes gentle, the printing dot becomes hard to be scraped off even in such a case that recording papers are rubbed with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inkjet recording device using hot melt type ink.

[Conventional technology]

Inkjet recording satisfies the requirements of high-speed printing, low noise, and the use of plain paper. During this period, a recording method using solid ink was devised as a means of solving the tax problem.
The second column is an inkjet recording method called a hot melt type, as disclosed in Japanese Patent Publication No. 59-7052. According to this recording method, printing is performed by heating and melting solid ink that is in a solid phase at room temperature "C".
The ejected ink solidifies immediately after printing. Therefore, compared to conventional water-based inks, they tend to bleed and take longer to dry.

[Problems to be solved by the present invention]

Here, the hot-melt type solid ink used in inkjet recording devices is 85 years old.
-108271 is a natural wax. This (printed part of recording paper printed using one-piece ink) consists of protruding printed dots similar to Braille, so when multiple sheets are stacked and rubbed together, the long side of the printed dots is scraped due to friction. This has the disadvantage that the back surface of the recording paper that the printed dots come into contact with is smeared with solid ink.As a result, if the printed recording paper is repeatedly rubbed, it has the disadvantage that the print quality deteriorates.

One way to make the surface of printed dots less likely to be scratched is to increase the hardness of the solid ink in its solid state. However, in general, as the hardness of solid ink increases, the viscosity when melted also decreases, which necessitates improvements to the ink ejection mechanism, such as increasing the cross-sectional area of the ink flow path or increasing the output of the drive element. has.

'4. SUMMARY OF THE INVENTION An object of the present invention is to provide an entire apparatus for processing printing dots so that even when the recording paper is rubbed together, the printed dots on the recording paper are difficult to be scraped.

[Means for solving problems]

To achieve this objective 4: The ink sieve recording device according to the invention 1 Prints by heating solid ink gold, which is in a solid state at room temperature, and melting it. A hot melt type O inkjet recording apparatus is characterized in that it is equipped with a complete mechanism for applying pressure to printed dots printed on recording paper.

[Effect]

Honjomei's above rII! According to Seibu, by applying full pressure with a roller to the solid ink printed on the recording paper, the solid ink is buried in the recording paper and the protrusions become loose.

[Implementation row]

Below, the one-top arrangement of the present invention will be explained based on the drawings.

Figure 1 shows an inkjet recording apparatus to which the present invention is applied - reference numeral 1 denotes a carriage that moves in the axial direction of the platen 3 guided by a guide member 2; It is equipped with a print head 4 and an ink tank 5, and is configured to be moved in a direction of 1 m across the entire printing paper P.

The printing paper P is fed by a platen 3 which rotates with a wick as the carriage 1 reciprocates, and is guided between the platen 3 and a roller 6 after being printed with ink droplets discharged from a pad 4. The material of the platen 3 and roller 6 is
For example, it is made of a material that maintains sufficient rigidity, such as stainless steel, and rotates while sequentially applying pressure of 59 to 100 Q weight/weight to the printing paper P inserted between them. have the necessary strength gold.

Fig. 2 is an explanatory diagram showing the change in the form of printed dots printed on the printing paper P at the front edge where the printing paper P is subjected to pressure by the roller 6;

Since the ink used here is in a solid state at room temperature, it is heated within the head flow path to a temperature of from the melting point to the melting point +50'C. Records sent to this recording device from an external device not shown here correspond to the issue.
Ink droplets 11 ejected from the head 4 fly and adhere to the printing paper P wound around the platen 3. Since the ink droplet 11 has a spherical shape with a diameter of at most μm, the heat capacity is small, and the print paper P immediately absorbs heat and hardens.

For this reason, each printing driver attached to the printing paper P)
12μ As shown in FIG. 2, it has a hemispherical shape.

Due to this shape, when multiple sheets of printing drum)xzub recording paper are stacked one on top of the other, the slight amount of contact between them increases the amount of q-flame that they receive, making them more likely to be scraped or peeled off.

Hit this printed dot 12, roller 6f! : When pressure is applied using the printer, the printing driver (13tj) is buried in the printing paper P as shown in FIG.

FIG. 3 is an explanatory diagram showing an implementation row of the filter 2 according to the present invention, in which the printing paper P printed by the print head 4 has two
It is configured such that pressure is applied by a book roller 6. According to this implementation, the rollers 6 can be arranged independently from the platen 3, and by aligning the diameters r of the rollers 6 of 2'$, there is an advantage of suppressing the print paper pz warping after pressure bonding.

The fourth reason for this is the perspective view of the print head section forming the 'samurai ridge' portion of the third embodiment according to the present invention. 5 purchases have been renewed.

That is, the roller 6 is attached to the platen 3 by a roller support 8 attached to the wall of the ink tank 50 and a spring 7.
It is strongly pressed against the upper printing mark P. The roller 6 sequentially applies pressure to the printed dots by the carriage 1 that moves along with printing. According to this implementation, the roller can be made smaller and lighter, and the period from the time of printing to the time when pressure is applied by the roller This method has the advantage that the printing time is relatively short, and by applying pressure before the printed dots are completely solidified, it is easier to embed the printed dots in the recording paper.

This method of applying pressure to the printed dots may be a method of directly comparing the printed dots with something other than a roller, such as a hammer.

〔Effect of the invention〕

As described above, according to the present invention, in a hot melt type inkjet recording device, when the printed solid ink is buried in the recording paper and the protrusions become loose, causing the recording paper to rub together. It also produces a special effect of being less likely to be scratched.

[Brief explanation of drawings]

FIG.
Figure 2 is a cross-sectional view of the print head shown in Figure 1, and Figure 3 is a cross-sectional view of the print head showing an embodiment of the present invention. Figure m4 is a perspective view of a print head section showing an implementation row of linen 3 according to the present invention. 1. Fist, carriage 4...Print head 5. Ink tank 6..Roller 71.Spring and applicant: Seiko Epson Kushiki Co., Ltd. Figure 2R Figure 3 Figure 4

Claims (1)

[Claims] An inkjet recording device is a hot melt type inkjet recording device that prints by heating and melting solid ink that is in a solid state at room temperature, and is characterized by being equipped with a mechanism that applies pressure to the printed solid ink.