JPH08118730A - Printing method for printer - Google Patents

Abstract

PURPOSE: To provide a method for printing a printer in which the decrease of the printing quality due to stitching can be prevented when printing on a record sheet such as OHP sheet, etc., is performed. CONSTITUTION: A printing head formed with a plurality of dots is driven to print twice on a predetermined record sheet 11 based on the same print information, and to print by altering the printing ranges of the first print 12 and the second print 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer printing method, and more particularly to a printer printing capable of preventing deterioration of print quality due to stitching when printing on recording paper such as OHP paper. Regarding the method.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional general printer. A platen 2 having a flat plate shape is arranged substantially at the center of a frame 1 of the printer so that its printing surface is substantially vertical. A carriage shaft 3 is arranged in parallel with the platen 2 below the platen 2 of the frame 1. A flange-shaped guide portion 4 is formed on the front edge of the frame 1, and a carriage 5 reciprocates along the carriage shaft 3 and the guide portion 4 on the carriage shaft 3 and the guide portion 4. It is movably attached. A print head 6 is attached to the tip of the carriage 5 so as to face the platen 2, and an ink ribbon is housed on the upper surface of the carriage 5, and the ink ribbon is attached to the print head 6 and the platen 2. A ribbon cassette (not shown) for guiding between the two is installed. Further, a winding bobbin 7 for winding the ink ribbon of the ribbon cassette is arranged on the upper surface of the carriage 5.

A sheet insertion port 8 for feeding a recording sheet (not shown) to the front of the platen 2 is formed behind the platen 2, and a portion of the sheet insertion port 8 has a predetermined speed. A paper feed roller 9 that conveys the recording paper is provided. A pressure contact roller 10 that is pressed against the paper feed roller 9 is rotatably disposed below the paper feed roller 9, and the paper insertion port 8 is provided between the paper feed roller 9 and the pressure contact roller 10. The recording paper inserted from is sandwiched and conveyed.

In the conventional printer, a recording paper is inserted through the paper insertion port 8, the recording paper is sandwiched between the paper feed roller 9 and the pressure contact roller 10, and the paper feed roller 9 is driven to rotate. As a result, the recording paper is conveyed at a predetermined speed in the direction orthogonal to the moving direction of the carriage 5. On the other hand, the print head 6 is pressed against the recording paper by a predetermined pressing force, and in this state, the carriage 5 is moved and the winding bobbin 7 is rotated to wind the ink ribbon of the ribbon cassette. The desired print is performed on the recording paper by driving the print head 6 based on a desired print signal.

[0005]

However, in such a conventional printer, when one line is printed on the recording paper and then the next line is printed, a gap is left between the inks on each print line. The rotation of the paper feed roller 9 is controlled so that the sheet is not formed. However, due to a paper feed error caused by the paper feed roller 9, printing of each print line printed on the recording paper 11 is performed as shown in FIG. At the boundary of 12, the print 12 of the next print line may overlap with the print 12 of the previous print line. When such prints 12 overlap with each other, the overlapping part looks dark. There is a problem that 12a is generated and the print quality is deteriorated.

The present invention has been made in view of the above points, and provides a printing method of a printer capable of preventing deterioration of print quality due to stitching when printing on recording paper such as OHP paper. The purpose is.

[0007]

In order to achieve the above object, a printing method for a printer according to a first aspect of the present invention is a printing head in which a plurality of dots are formed in a direction perpendicular to the printing direction. While moving, by driving each of the dots based on the desired print information, the ink of the ink ribbon is transferred to a predetermined recording paper for printing, and when the printing of one line is completed, the recording paper is conveyed, A printing method of a printer adapted to print the next line, wherein printing is performed twice on the recording paper based on the same print information, and the first printing range and the second printing range are set. It is characterized in that it is changed and printed.

According to a second aspect of the present invention, each dot is driven based on desired print information while moving a print head having a plurality of dots formed in a direction perpendicular to the print direction in the print direction. This is a printing method of a printer in which the ink of the ink ribbon is transferred to a predetermined recording paper to perform printing, and when the printing of one line is completed, the recording paper is conveyed and the next line is printed. Then, the recording paper is conveyed so that the boundary portion of each print line partially overlaps the recording paper, and the first printing is performed, and then some dots of the print head are driven to perform the second printing by the fine line. The feature is that overprinting is performed.

Further, in the printer printing method according to the second aspect, it is preferable that the color of the first printing and the printing
It is characterized in that the color of the first printing is printed in the same color, and the color of the first printing and the color of the second printing are printed in different colors. It is characterized by that.

[0010]

According to the printer printing method of the first aspect of the present invention, when printing is performed, the printing range is changed so that the second printing partially overlaps the first printing. As a result, the print density of each print line can be increased, a paper feed error occurs, ink in each print line overlaps and stitching occurs, and a gap is formed at the boundary of each line. Even in this case, the stitching and the gap can be made inconspicuous.

According to the printer printing method of the second aspect of the invention, the recording paper is conveyed such that the boundary of each printing line partially overlaps the recording paper, and the first printing is performed. After that, since a part of the dots of the print head are driven at predetermined intervals to perform the second overprinting by the fine line, the overprinting can make the stitching inconspicuous. It is suitable to use the mono-color ink ribbon when the overprinting is printed in the same color as the first printing, and when the overprinting is printed in a different color from the first printing, it is multi-colored. It is suitable when an ink ribbon is used.

[0012]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 shows an embodiment of a printing method of a printer according to the present invention, which is a recording paper 11 such as an OHP sheet.
In the present embodiment, when printing is performed on two sheets, printing is performed twice based on one print information. That is, first, when the first line is printed in the first printing 12, the printing head is driven based on the desired printing information, and the printing 12 is performed using the entire dots of the printing head. Then, the recording paper 11
The paper feed for one line is performed, and the second line of print 12 is performed based on the print information without using n dots at the upper end of the print head.

By repeating such an operation, the first printing is completed by printing 12 of each print line without using a part of n dots of the upper end portion of the print head.

Next, in the second printing 13, when the printing 13 of the first line is performed, the printing head is driven based on the desired printing information, so that n dots at the lower end of the printing head are printed. Printing 13 is performed without using. Then, after the recording paper 11 is fed, similarly, the printing 13 of the second line is performed without using n dots at the lower end of the print head. In this case, since the print information at the upper end of the second line becomes the print information at the lower end of the first line of the first print 12, the second line is printed when the print 13 of the second line is performed. The print information includes n at the lower end of the print information of the first line of the first print 12.
Printing information for the second line is printed by copying the dot printing information or adding the stitched image data. Then, the above operation is repeated, and the last print line is printed by using all the dots of the print head, whereby the second printing 13 is completed. Contrary to the above-described embodiment, when the first printing 12 is performed without using n dots at the lower end of the print head and the second printing 13 is performed, n at the upper end of the print head is used. The dots may not be used and may be overlaid on the first print, or these methods may be combined to print.

In this embodiment, when printing is performed,
In the first printing 12, the printing 12 from the second line onward is performed without using the n dots at the upper end of the print head.
In the first printing 13, the printing is performed without using the n dots at the lower end of the print head so that the second printing 13 overlaps the first printing 12 by n dots. Since it is possible to increase the print density of each print line, even if a paper feed error occurs and the ink of each print line overlaps and stitching occurs, or a gap is formed at the boundary of each line, The stitching and the gap can be made inconspicuous.

Therefore, in this embodiment, since the print density of each print line can be increased by performing the overprinting twice based on one print information, a paper feed error occurs and each print line is generated. Even if the above inks are overlapped to cause stitching or a gap is formed at the boundary of each row, the stitching and the gap can be made inconspicuous, and printing is performed on the light-transmissive recording paper 11 such as OHP paper. Even if it does, the print quality can be improved. In the above-described embodiment, after the printing of one page is completed by the first printing 12, the recording paper 11 is conveyed backward to the printing start position, and
Although the first overprinting 13 is performed, it is also possible to perform the second overprinting 13 after the first printing, and control to start a line feed and print the next line.

FIG. 2 shows another embodiment of the present invention. In this embodiment, when the first line 12 is printed 12 in the first printing 12 on the recording paper 11, it is desired. By driving the print head based on the print information, the printing 12 is performed using the entire dots of the print head. After that, one line of the recording paper 11 is fed, but in the present embodiment, the printing 12 of the second line is performed.
The paper is fed so that 1 to 2 dots overlap the print 12 of the first line. Then, the print head is driven to perform the printing 12 on the second line, and the above operation is repeated to complete the first printing 12.

Next, when performing the second printing 13,
Of the dots on the print head, for example, 1 to 8 dots
Overprinting 13 is performed by driving only two dots, and fine line printing is performed. 2 like this
When the first printing 13 is performed, the presence or absence of the first printing information is detected, and the portion not printed by the first printing 12 is controlled not to be overprinted 13. In the present embodiment, the second overprinting 13 is performed with the same color ink as that of the first printing 12. For example, when printing 12 is performed in black, it is black; when printing 12 is in yellow, it is yellow; when printing 12 is in magenta, it is magenta; Is for performing overprinting 13 in cyan. It should be noted that when the first printing 12 is performed with a dark black color or a light yellow color, the stitching is relatively unnoticeable as it is, but the overlapping printing 13 makes the stitching more noticeable. It can be lost.

As described above, in this embodiment, since the overprinting 13 is performed in the same color as the first printing 12, the multi-color ink in which a plurality of colors are continuously formed on one ink ribbon. When using a ribbon,
The length of one color ink portion is required for the first and second printing, that is, two lines are required, and the length of one cycle becomes long, and the number of cycles per ribbon cassette becomes small. Further, as in the conventional case, when a multi-color ink ribbon having a length of one line is used, the waste of the ink ribbon becomes very large, so that a mono-color ink ribbon consisting of one color of ink ribbon is used. Suitable for printers to use and replace with different color ink ribbons as needed.

Therefore, in this embodiment, after the first printing 12 is performed, a part of the dots at a predetermined interval of the print head is driven to perform the fine line-shaped overprinting 13. Overprinting 13 makes stitching inconspicuous, and a transparent recording paper 11 such as OHP paper
Even when printed on, the print quality can be significantly improved.

FIG. 3 shows another embodiment of the present invention. In this embodiment, in the embodiment shown in FIG. Overprinting 1 by driving 2 dots
In the case of carrying out 3, the second printing 13 is printed in a color different from the color of the first printing 12.

That is, when the first printing 12 is performed in yellow, the second printing 13 is performed by the printing head 8
Each dot is driven by one dot, and ON / OFF is alternately repeated for each dot to perform printing 13 with magenta. Further, when the first print 12 is performed in magenta, the second print 13 is driven by 1 dot for every 8 dots of the print head and alternately turned on by 1 dot at a time.
/ OFF is repeated to perform overprinting 13 with cyan, and the dots at a position shifted by 4 dots from the dot printed with cyan are driven to turn ON one dot at a time.
By repeating OFF, the overprinting 13 is performed in yellow. Further, when the first print 12 is performed in cyan, the second print 13 is driven by 1 dot for every 8 dots of the print head and alternately turned ON / OFF by 1 dot to overlap with magenta. Print 13
In addition, the dots at the position shifted by 4 dots from the print dot position by magenta are driven to alternately turn on / off one dot at a time, thereby performing overprinting 13 with yellow. Overprint 13
It is also possible to combine the data of 1) with the print data of the same color as the color used for the overprinting 13 and print it together.

In the present embodiment, since the first printing 12 and the second overprinting 13 are printed in different colors, a multi-color in which a plurality of colors are continuously formed on one ink ribbon. Even when a color ink ribbon is used, the ink ribbon cycle required for printing one line is one cycle, and the consumption amount of the ink ribbon can be reduced.

Therefore, in the present embodiment as well, FIG.
Similarly to the embodiment shown in FIG. 2, after the first printing 12 is performed, the dots at predetermined intervals of the print head are driven to perform the thin line-shaped overprinting 13. Therefore, stitching is performed by this overprinting 13. Is not noticeable, and the printing quality can be remarkably improved even when printing is performed on the light-transmissive recording paper 11 such as OHP paper. Moreover, since the first print 12 and the second overprint are printed in different colors, the consumption of the ink ribbon can be reduced even when a multi-color ink ribbon is used.

When printing with two or more colors is performed as the first printing 12, as shown in FIG.
The color of the second overprint is determined according to the color of the first print.

The present invention is not limited to the above-mentioned embodiment, but can be variously modified if necessary.

[0028]

As described above, the printing method of the printer according to the present invention can increase the print density of each print line by performing the overprinting twice based on one print information. Even when a paper feed error occurs and ink in each print line overlaps to cause stitching, or when a gap is formed at the boundary portion of each line, the stitching and the gap can be made inconspicuous. Even when printing is performed on a light-transmissive recording paper, the printing quality can be improved.

Further, after the first printing, the dots of the print head are driven at predetermined intervals to perform fine line-shaped overprinting, so that stitching becomes inconspicuous due to this overprinting, and OHP paper, etc. Even when printing is performed on the light-transmissive recording paper, the printing quality can be remarkably improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a printing method of a printer according to the present invention.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is an explanatory view showing another embodiment of the present invention.

FIG. 4 is an explanatory view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional general printer.

FIG. 6 is an explanatory diagram showing a printing state by a conventional printer.

[Explanation of symbols]

 11 Recording paper 12 First printing 13 Overprinting second

Claims (4)

[Claims] 1. An ink on a predetermined recording paper by driving each dot based on desired print information while moving a print head having a plurality of dots formed in a direction perpendicular to the print direction in the print direction. A printing method of a printer in which the ink of a ribbon is transferred to perform printing, and when the printing of one line is completed, the recording paper is conveyed and the printing of the next line is performed. 2 based on information
A printing method for a printer, wherein printing is performed once, and printing is performed by changing the printing range of the first printing and the printing range of the second printing. 2. An ink on a predetermined recording paper by driving each dot based on desired print information while moving a print head in which a plurality of dots are formed in a direction perpendicular to the print direction in the print direction. A printing method for a printer in which the ink of the ribbon is transferred to perform printing, and when the printing of one line is completed, the recording paper is conveyed and the next line is printed. After the recording paper is conveyed so that the boundary portions of the print sheets partially overlap with each other and the first printing is performed, a part of the dots of the print head is driven to perform the second overprinting by the fine line. Characteristic printer printing method. 3. The printing method for a printer according to claim 2, wherein the color of the first printing and the color of the second printing are printed in the same color. 4. The printing method for a printer according to claim 2, wherein the color of the first printing and the color of the second printing are different from each other.