JPS58211458A - Color ink jet recording device - Google Patents

Abstract

PURPOSE:To make a dot size uniform, by shaping one dot by piling ink drops jetted plural times in a monochromatic recording and piling ink drops jetted once from each nozzle in the color recording. CONSTITUTION:E.g., in the case of which the monochromatic recording of a cyan (C) and the color recording of a green by piling the cyan (C) and a yellow (Y) are performed, a C monochromatic dot and a dot piled by C and Y are recorded on each recording position on a recording paper 10 at the forward travel of a carriage 1, then the ink drop of the C color is jetted and piled only on the dot position of the C monochrome at the backward travel and one dot is shaped. Because smaely in all cases of the color recording, the monochromatic recording is done by piling the ink drops jetted two times at both ways and the color recording is by piling the ink drops jetted once at one-way, each dot size becomes the same degree.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides
The present invention relates to a color inkjet recording device that performs color recording of characters, graphs, etc.

Normally, to perform color recording with an inkjet recording device, multicolor ink, such as cyan, magenta, and yellow ink, is ejected from different inkjet nozzles, and various colors are expressed by overlapping the inks. ing.

However, when expressing color by overlapping multiple ink droplets, the diameter of the dots recorded on the paper is unevenly overlapped at the same point on the recording paper. This method has the disadvantage that the diameter of the dots is larger than that when recorded on recording paper.

The present invention is intended to eliminate the above-mentioned drawbacks of the conventional method.When recording with a single color, the ink droplets are ejected multiple times and the ink droplets are overlapped on the recording paper to form one dot, and the ink droplets of multiple colors are ejected multiple times to form one dot. When recording in color by adjusting the amount,
By forming one dot by overlapping ink droplets ejected once from each nozzle, it is possible to make the diameter of the dot on the recording paper about the same for both the former and the latter. This makes it possible to always keep the dot size uniform even when recording in different colors or recording by overlapping multiple colors.

Next, an embodiment according to the present invention will be described with reference to FIGS. 1 to 6.

In FIG. 1, a carriage 1 is movable on a guide shaft 2 and a nabot shaft 6 in the direction of the arrow by a force transmitted from a tie belt 4. In FIG. Furthermore, for example, five inkjet nozzles 5 are mounted on the carriage 1, each containing red, cyan, magenta, and yellow ink. FIG. 2 shows the cross-sectional structure of the inkjet nozzle 5, where 6 is a piezo, 7 is a nozzle, and its tip has an ejection orifice 8. When the piezo 6 contracts in response to a print signal, the ink 9 is ejected. It is discharged from the orifice 8. The inkjet nozzle 6 is not limited to a piezo, and various other inkjet nozzles can be used.

Next, the operation of the color inkjet apparatus with the above configuration will be explained. For example, if cyan single-color printing is performed and green color printing is performed by superimposing cyan and yellow, each of the recording sheets is Dots of single cyan color or dots of cyan and yellow superimposed are recorded in the recording position above 10, and in the backward stroke, the superimposed recording of cyan and yellow is not performed, but instead of the single color of cyan recorded in the forward stroke. One ejected cyan ink droplet is superimposed on the other at the same position as the dot to form one dot. Similarly, in the case of all color recording, for monochrome recording, if ink droplets are overlapped by two ejections by reciprocating printing, and one dot is formed by overlapping one ink droplet, the carriage At the end of one round trip, the dot sizes of single color and multi-color dots on the recording paper 10 are approximately the same.

As explained above, when recording a single color, one dot is formed on the recording paper by multiple ejections, and
In the case of power 2-recording by superimposing multiple colors, one dot is formed by superimposing ink droplets ejected once from each nozzle, so that the size of the dot on the recording paper is the same for both the former and the latter. This has the effect that the dot size does not always become non-uniform even when color recording using a single color or color recording using a plurality of colors superimposed is mixed.

[Brief explanation of drawings]

Figure 1 is a perspective view of the middle ridge part. Figure 2 is a cross-sectional view of the nozzle part of the inkjet head. FIG. 3 is a plan view of the recording apparatus. 5...Φ fist inkjet nozzle part 6II Gin...Piezo 7... Battle nozzle 8・Fist 11 discharge orifice 9... [Co., Ltd.] Inc. 10.0...recording paper Applicant: Nakayanon Co., Ltd.

Claims (1)

[Claims] In a color inkjet recording device that performs color recording by ejecting ink droplets of multiple colors through a nozzle and overlapping the ink dots, the ink droplets are ejected multiple times during monochrome recording. A color inkjet recording apparatus characterized in that one dot is formed by overlapping ink droplets, and one dot is formed by overlapping ink droplets ejected once from each nozzle during color recording by overlapping a plurality of colors.