JPS61230952A - Ink jet printer - Google Patents

Abstract

PURPOSE:To enable high density printing imparting a character having good printing grade and to make it possible to utilize the title printer not only as a color image recording printer but also as a character printer, in the printing of a character, by performing recording by selecting an orifice group made dense in a sub-scanning direction. CONSTITUTION:Orifice groups 6Y-6B2 for yellow, magenta, cyan, first black and second black are successively arranged in the main scanning direction by a head 6. The orifices 11-14 of the orifice groups 6Y-6B1 in a sub-scanning direction are provided on the same axis as corresponding orifices in a horizontal direction. The orifices 11'-14' longitudinally provided of the orifice group 6B2 in the sub-scanning direction are provided at positions respectively shifted by a half-dot from the orifices 11-14 of the orifice group 6B1 in the longitudinal direction. That is, when a character is printed by black in, by using the orifice groups 6B1, 6B2, printing can be performed in recording density twice in conventional density and high grade printing can be performed.

Description

[Detailed Description of the Invention] Technical Field> The present invention relates to a color recording method that performs color recording by jetting color ink, that is, jetting ink particles of each color such as yellow, magenta, cyan, and black toward a recording medium. It is related to printers.

<Prior art> Conventionally, an ink jetting device for recording figures, characters, etc. in multiple colors has been equipped with inks of four colors consisting of the three primary colors cyan, magenta, and yellow, and black, and by mixing these inks, figures, characters, etc. in multiple colors can be recorded. There are on-demand inkjet printers that record images such as

As shown in FIG. 3, slide shafts 2 and 3 are arranged in parallel in front of the platen 1, and the shafts 2 and 3 are
Carriage 4 is on the platen! It is supported for horizontal movement along the

This carriage 4 is connected to a pulse motor (not shown) with a wire or the like, and the movement of the carriage 4 is achieved by the rotation of this pulse motor, and recording is made during this rightward movement. Further, the carriage 4 is equipped with ink tanks 5 that individually store inks of four colors.

Four types of recording heads 6 are provided on the surface of the ink tank 5 facing the platen 1, and ink cartridges 7 to 10 are inserted into the ink tank 5.

That is, in the figure, 7 is a yellow ink cartridge, 8 is a mazzetta, and 9 is a cyan ink cartridge, and by mixing these primary color inks on the medium, recording pixels of a plurality of colors can be obtained. In addition, black ink is also provided, and 10 is an ink cartridge for this black ink.

A front view of the recording head 6 is shown in FIG.

From the right in the recording direction (front), four orifice groups for yellow 6Y, four orifice groups for magenta 6M, four orifice groups for cyan 60, and four orifice groups for black 6B are arranged in this order, and each orifice 11 of each group
, 12, 13, and 14 correspond to four dots in the row direction (vertical) of recording pixels. The horizontal spacing between orifices in each group corresponds to eight dots. Also, each group of four orifices 1
1 to 14 are arranged on the same axis as the orifice of each color in the horizontal direction.

However, the above-mentioned color printers are generally used to record color images, but are also required to print characters in black or the like, similar to ordinary printers.

That is, there has recently been a demand for printers that can be used for multiple purposes, such as recording color images and recording high-quality characters.

However, since the head configuration of the color printer described above is for recording color images, the recording dot spacing is, for example, 1/120 inches, and when character printing is performed with this printer head, high quality printing is required. Character printing was not as expected.

In other words, when characters are recorded using the above-mentioned color printer, the printing quality is poor and the printer is significantly inferior in functionality as a so-called character printer.

<Objective of the Invention> An object of the present invention is to provide an inkjet printer that can be used for multiple purposes and is capable of recording high-quality characters from color image recording.

<Embodiment> FIG. 1 is a front view of the recording head 6 in the inkjet printer of the present invention, and from the right to the left, that is, in the main scanning direction by the head 6, there are an orifice group 6Y for yellow and an orifice group 6M for magenta. , a cyan orifice group 6C, a first black orifice group 6B, and a second black orifice group 6B2 are arranged in this order, 6Y to 6B.

Each vertically arranged orifice 1 in each group, that is, in the sub-scanning direction
1, 12, 11, and 14 are provided on the same axis as the corresponding orifice in the horizontal direction, and in the row direction (
This corresponds to 4 dots in the vertical direction).

Further, the vertically arranged orifices 11, 12, 13', 14' of the second black orifice group 6B2 in the sub-scanning direction.
is the first black orifice group 6B.

The orifices 11 to 14 are provided at positions shifted by half a dot in the vertical direction.

In other words, when printing characters using black ink,
By using the first and second black orifice groups 6B and 682, it is possible to print at double the recording density of the conventional one, making it possible to perform high-quality printing.

The first and second black orifice groups 6Bl, 6
B2 is led to a black ink tank, and other structures such as the ink tank and ink cartridge are the same as those shown in FIG. 3, and a detailed explanation thereof will be omitted.

Figures 2 (A) and (B) show examples of character printing, that is, the recording of the character "''B.'
is the first and second black orifice group 6B1°6.
82, and FIG. 2 (Bl is the image printed using only one of the orifice groups 6Y, 6M, and 6C, i.e., this is the state of character printing in a conventional printer. It is equivalent.

As can be understood from this printing example, in the case of FIG. 2(A), an intermediate dot can be further formed between the tod and dot of FIG. 2(B), that is, only black orifice groups 6Bl, 6B
2 enables high-density printing, resulting in a high-quality character printer equivalent to, for example, a Kanji printer.

In addition, for normal color recording, orifice group 6Y
, 6M, 6C, 6B, the same color recording as before can be achieved.

Effect> As described above, in the present invention, the recording head is provided with orifice groups corresponding to each color in the main scanning direction, and each orifice in each orifice group is arranged at a predetermined interval in the sub-scanning direction. , and further one of the plurality of orifice groups.
One orifice group is provided with orifices that are denser in the sub-scanning direction than the orifices of the other orifice groups, and the orifice group that is denser in the sub-scanning direction is selected and recorded in character printing. This makes it possible to realize high-density, high-quality character printing, and to obtain a multipurpose inkjet printer that can be used not only for recording color images but also as a character printer.

[Brief explanation of drawings]

FIG. 1 is a front view showing a recording head of an inkjet printer of the present invention, FIGS. 2A and 2B are views showing an example of printing by the same printer, and FIG. 3 is a perspective view showing the configuration of a conventional printer. FIG. 4 is a front view of a recording head of a conventional printer. 6: Recording head, 6Y: Yellow orifice group, 6M
: magenta orifice group, 6C nitrogen orifice group, 6B+=first black orifice group, 6B2: second black orifice group. Agent Patent attorney Aihiko Fukushi (and 2 others) Figure 1 (A) He〇so wL2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. In an inkjet printer that sequentially records by relative movement between a recording head that ejects color ink and a recording medium, orifices are provided in the main scanning direction of the recording head, each corresponding to the ink color installed. The orifices in each orifice group are arranged at predetermined intervals in the sub-scanning direction, and for one orifice group among the orifice groups corresponding to each color, each orifice in the other orifice group An inkjet printer characterized in that the orifices are arranged in a denser orifice configuration in the sub-scanning direction. 2. The inkjet printer according to claim 1, wherein the orifice group densely arranged in the sub-scanning direction corresponds to black ink.