JPH05238068A - Copying paper printing method for serial impact dot printer - Google Patents

Abstract

PURPOSE:To improve copying capacity and print grade by a method wherein a carriage moves by shortest repeat times of the same print dot pin and the same printing data is printed repeatedly through the print dot pin at every position after the movement. CONSTITUTION:For example, a character is constituted of 5X9 dots in length and width, copying paper is constituted of 5 sheets, and a print head having 5 print dots in the vertical direction is moved by a carriage. While each print dot pin is moved in the lateral direction (arrow 10) by the movement of the print head, a print dot pin designated by a printing data among the 5 print dot pins is made to strike the copying paper so as to print dots. Firstly, a dot 1a to be a first printing data of the printing data in a first line is printed. Thereafter, the carriage is moved by the shortest repeat time, in which the copying paper is kept in a pressed form, of the print dot pin of the same print dot. On a position after the movement, a dot 1A to be the same printing data as the dot 1a is printed. Next, 1b, 1B,... 1i, 1I are printed in sequence.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copy paper printing system in a serial impact dot printer.

[0002]

2. Description of the Related Art FIG. 5 shows an example of printed characters. The character 1 here consists of a set of small dots of 5 (vertical) x 9 (horizontal) dots, and each dot is printed by striking a paper with fine print dot pins through an ink ribbon or the like. To be done. There are five print dot pins in the vertical direction, and by moving the print head by the carriage, characters are printed while moving the print dot pins in the horizontal direction. Also, when printing 9 times (dots) in the horizontal direction, the printing of one character is completed, then the next character is printed while moving in the horizontal direction, and when the printing of one line is completed, the specified line spacing is met. Paper feed (line feed) by the amount (length) is performed. The above is the printing method for normal printing.

On the other hand, in printing using a medium in which a plurality of copy sheets are printed at the same time (hereinafter referred to as "copy sheet"), an air layer is present between the copy sheets and the air Since the layer weakens the impact force, the desired printing may not be obtained even if the printing dot pin is struck once on the copy paper. Therefore, when copy paper is used, the same print data is repeatedly printed at the same position on the same line.

6 to 9 show an example of a conventional copy paper printing method. 6 to 9, in this example, one character 1 is composed of 5 (vertical) × 9 (horizontal) dots, and the copy paper 2 is five copy papers from 1P to 5P. Is shown between the platen 3 and the print head (print dot pin 4) for printing.
Although not shown, the print head is also moved by a carriage (not shown), and the print head is provided with five print dot pins 4 in the vertical direction (only one is shown in FIG. 5). There is.

When performing printing, while moving each print dot pin 4 in the lateral direction (direction of arrow 5 in FIG. 6) by moving the print head, printing among the five print dot pins 4 is performed. Print dot pin 4 specified by the data
On the copy paper 2 to print dots (Fig. 7
reference). In this manner, when the dots are printed nine times (dots) in the horizontal direction and the dots indicated by the reference numerals 1a to 1i in the drawing of FIG. The next character is printed while moving in the direction. When printing of one line is completed, the carriage is returned to the head position of the same line (carriage return), and the same print data is printed on the same line at the same position as the previous time. Figure 6
In the figure of (b) in the figure, the character 1 shown by dots 1A to 1I indicates a state in which the same print data is printed at the same position on the same line in this way.

When the print dot pins 4 are struck on the copy paper 2 with a predetermined impact force P, the spaces formed between the first plate and the platen 3 are eliminated as shown in FIG. , The respective copy sheets (1st to 5th sheets) are pressed against the platen 3 and printing is performed. Also, during the T seconds during which the first printing is performed, the carriage is returned, and the second printing is performed,
Due to the elasticity of each copy paper (1P-5P), each copy paper (1P-5P) is returned to the print dot pin 4 side.
As a result, immediately before the second printing is performed, a space is again formed between the copy sheets (1st to 5th sheets) as shown in FIG. Next, when the second printing is performed and the print dot pins 4 are struck by the impact force P, the space between the copy papers (1P to 5P) is eliminated, and each copy paper (1
(Pth to 5th Pth) are pressed against the platen 3 side as shown in FIG. 9, and printing is performed again.

[0007]

As described above, in the conventional copying paper printing method, in order to perform the second printing shown in FIG. 9 from the first printing shown in FIG. 7, the printing of the first line is performed. After the carriage return, the carriage is returned, and the same printing is repeated after the carriage return. It takes T seconds from the first printing to the second printing. Therefore, when the first printing is finished and the second printing is performed, each copy paper (1P to 5P) is returned to the print dot pin side by its elastic return force, and as shown in FIG. A space can be provided between the copy sheets (1st to 5th sheets) to prevent the impact force P due to the print dot pin 4. Therefore, even at the time of the second printing, since the space is removed by the impact force P and the printing is performed, the impact force P that contributes to the actual printing is weakened, and a too large copying ability cannot be obtained. There was a problem to say.

The present invention has been made in view of the above problems, and an object thereof is to provide a copy paper printing method in a serial impact dot printer which can improve the printing quality on copy paper.

[0009]

In order to achieve the above object, the present invention is to move a print head having a plurality of print dot pins integrally with a carriage so that the print dot pins corresponding to print data are struck on a copy sheet. This is a copy paper printing method in a serial impact dot printer that prints by using the same printing data while continuously printing the same print data a plurality of times.

[0010]

According to this, since the print dot pin of the print head continuously prints the same print data a plurality of times, the time from the previous impact to the next impact by the print dot pin is shortened. As a result, the state in which the space between the copy sheets has been removed at the previous impact is maintained until the next impact is performed, and the next impact can be achieved with no or little space between the copy sheets that hinders the impact force. Will be done.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 6 show the printing method of the present invention. Further, in FIGS. 1 to 4, the same reference numerals as those in FIGS. 5 to 9 denote the same components.

1 to 4, in the printing method of the present invention, one character 1 is composed of 5 (vertical) × 9 (horizontal) dots, and the copy paper 2 is also from 1P to 5P. In this example, the copy paper 2 is arranged between the platen 3 and the print head (print dot pins 4) for printing. In addition, the print head is moved by a carriage (not shown), and five print dot pins 4 of the print head are provided in the vertical direction.

When printing is performed, the print data in the five print dot pins 4 is moved while moving each print dot pin 4 in the lateral direction (the direction of arrow 10 in FIG. 1) by the movement of the print head. Print dot pin 4 specified by
As shown in FIGS. 2 and 4, dots are printed by hitting the copy paper 2.

The printing method in this case is as shown in FIG.
In the above, assuming that the character 1 is composed of nine print dots, first, the dot 1a which is the first print data of the print data in the first line is printed. That is, FIG.
As shown in FIG. 1, the copy paper 2 is pressed against the platen 3 by the impact of the print dot pin 4 corresponding to the dot 1 a in FIG.

After that, the carriage is moved for the shortest repetition time t [seconds] of the print dot pin 4 of the same print dot, and the dot 1A having the same print data as the dot 1a in FIG. 1 is printed at the position after this movement. To do. This time t is
Since it is a very short time, each copy paper (from the first page
As shown in FIG. 3, the copy paper 2 consisting of the 5th P) maintains the shape held by the print dot pins 4 of FIG. 2, and the printing with the dot 1A shown in FIG. Further printing will be performed in a state where there is no space in the eyes) that hinders the impact force. It should be noted that at the time t, the shape pressed in FIG. 3 is maintained and the print dot 1a in FIG.
It may be a time when the carriage is moved infinitely close to one print dot pitch, and the same print data may be printed a plurality of times under the condition of the time t.

In this way, when the first print dots 1a and 1A are printed, the next print dots 1b and 1A are printed.
B, 1c, 1C, 1d, 1D, 1e, 1E, 1f, 1
F, 1g, 1G, 1h, 1H, 1i, 1I are sequentially printed by the same method.

[0017]

As described above, according to the copy paper printing method in the serial impact dot printer according to the present invention, the print dot pins of the print head continuously print the same print data a plurality of times. (1st page ~
It is possible to perform the next impact in a state where there is no space that hinders the impact force between the 5th P) or a small amount of space, and it is expected that the copying capability and the printing quality are improved.

[Brief description of drawings]

FIG. 1 is a diagram showing print dot positions printed by a printing method of the present invention.

FIG. 2 is a side sectional view corresponding to the first dot of the first time shown in FIG.

FIG. 3 is a side sectional view showing a state immediately before the printing of the first dot of the second time shown in FIG.

FIG. 4 is a side sectional view corresponding to the first dot of the second time shown in FIG.

FIG. 5 is a diagram showing an example of print characters.

FIG. 6 is a diagram for explaining a conventional printing method.

FIG. 7 is a side sectional view in which a first dot is printed for the first time by a conventional printing method.

FIG. 8 is a side sectional view showing a state immediately before printing in which a first dot is printed a second time in the conventional printing method.

FIG. 9 is a side sectional view in which a first dot is printed a second time by a conventional printing method.

[Explanation of symbols]

 1 character 1a to 1i 1st dot printed 1A to 1I 2nd dot printed 2 Copy paper 3 Platen 4 Print dot pin

Claims (3)

[Claims] 1. A copy paper printing method in a serial impact dot printer, wherein a print head having a plurality of print dot pins is moved integrally with a carriage, and the print dot pins corresponding to print data are struck on a copy paper for printing. A copy paper printing method for a serial impact dot printer, which is characterized in that the same print data is printed plural times continuously while printing is performed. 2. The carriage according to claim 1, wherein the carriage is moved by a minimum repetition time of the same print dot pin, and the same print data is repeatedly printed via the print dot pin at each position after the movement. Copy paper printing method in the described serial impact dot printer. 3. The copy paper printing in a serial impact dot printer according to claim 1, wherein the same print data is repeatedly printed through the dot pins within a time period in which the carriage moves by one print dot pitch. method.