JPH0550395B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data printing device using a wire dot head, a thermal head, or the like as a printing head.

[Prior Art] Conventionally, in a type of printing device such as a daisy wheel printer in which type is mounted on a printing stand, a correction tape is provided, and this tape is used to overprint previously printed characters. Therefore, the printing is erased and corrections are made. However, in printing devices using wire dot heads or thermal heads, it has not been possible to make corrections using such correction tapes.

[Problems to be Solved by the Invention] For this reason, with conventional printing devices using wire dot heads or thermal heads, it has not been possible to clearly correct and print printed data once printed.

This invention has been made to solve these problems, and provides a data printing device that can clearly correct previously printed data and can quickly start printing the next print data after correction printing. The purpose is to

[Means for Solving the Problems] The present invention includes a correction data save area for storing previously printed print data and information such as lines and columns attached to the print data, a correction key, and a correction key. A data conversion means that saves the current print head line and column information in memory when a key is input, and converts the actual print data in the correction data save area into an underline code;
A correction mark printing processing means that moves the print head to the previous printing position based on column information and prints an underline as a correction mark over the previously printed character based on the converted underline code; This apparatus is provided with a print head return means for returning the print head to its original position before the start of correction based on the current line and column information saved in the memory after printing of a line is completed.

[Function] In the present invention having such a configuration, when the correction key is operated, the line information and column information of the current print head are saved, and the actual print data of the previous print data stored in the correction data save area is saved. The character data is converted to an underline code, the print head is moved to the previous print position based on the line and column information indicating the previous print position stored in the correction data save area, and the print head is moved in this state. to print an underline over the previously printed character. In other words, an underline is printed as a correction mark. When the underline printing is completed, the print head is moved based on the saved line and column information of the print head, and the print head is automatically returned to the position before correction.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a data processing device incorporating a data printing device of the present invention, and a keyboard 1 and a display device 2 are provided on the front side of the device.
Further, a data printing device 3 is housed in the center of this device. This data printing device 3 is provided with a platen 4 around which printing paper is wound, and also houses a printing mechanism in which a wire type dot head is mounted on a carriage. Note that 5 is a knob for manually rotating the platen 4.

The keyboard 1 is particularly provided with a correction key 1a.

Figure 2 is a circuit block diagram of the data processing device.
11 is the main CPU that constitutes the main body of the control unit; 12
13 is a ROM in which program data etc. for this main CPU 11 to control each part are stored.
is a RAM provided with a memory for temporarily storing data being processed, a buffer for storing print data and display data, a buffer for storing input data from the keyboard 1, and the like. The main CPU 11 and
The ROM 12 and RAM 13 are connected by a bus line 14.

In addition, the main CPU 11 has a bus line 14.
via a display interface 15, a keyboard controller 16 and a print interface 17.
is connected.

The display device 2 is connected to the display interface 15, and the keyboard controller 1
6 is connected to the keyboard 1, and the printing interface 17 is connected to the data printing device 3.

The data printing device 3 is connected to the main CPU 11.
A printing CPU 18 that exchanges information with the printing CPU 18, a ROM 19 that stores program data for the printing CPU 18 to control each part and character patterns for printing, a data save area for correction, and a memory that saves current information. The printer is comprised of a RAM 20 equipped with a dot printing head, a carriage, an ink ribbon drive section, a platen drive section, and the like.

When the printing CPU 18 receives print data from the main CPU 11, it transfers the print data to the RAM 20.
The correction data is saved in the correction data save area, and the printing mechanism 21 is driven to print out the data. In this case, the print information received from the main CPU 11 is
As shown in the figure, the data consists of print data a and information accompanying the print data a, that is, line information b, character type information c, print pitch information d, and column information e. Note that line information b is information on the line on which print data a is printed, character type information c is information on pica characters, elite characters, micro characters, etc., and printing pitch information d is information on the pitch between printed characters. , column information is information on the column to be printed in the print data a.

Print data a is 41 _H = A, as shown in Figure 4.
42 _H = B, 43 _H = C actual print data a ₁ and ESC and
Consists of FF print activation code _A2 .

When the printing CPU 18 receives the key input information of the correction key 1a from the main CPU 11, the printing CPU 18
Perform the processing shown in the figure. First, the line information and column information where the print head is currently located are
Save to RAM20. Next, if there is an underline code in the print data, it is deleted. Then, as shown in Figure 5, the actual print data _a1 is converted to space data _a3 , and an underline start code _a4 and an underline end code _a5 are added before and after it.
Insert. (Data conversion means) In this state, the print head is moved to the correction printing position based on the line information b and column information e of the correction data save area. That is, the print head is moved to the front of the previous print position. In this state, the print head is moved from left to right based on the underline start code _A4 and the underline end code _A5 to print an underline overlapping the previous print data. Also, the print head is shifted slightly downward, and conversely, the print head is moved from right to left to print a second underline overlapping the print data.
(Correction mark printing processing means) When this printing process is completed, the print head is returned to the position before correction based on the current line information and column information saved in the RAM 20. (Print head return means) In this way, the print head becomes ready for the next printing.

In this embodiment with such a configuration, for example, when the characters "ABC" were previously printed and the print head 21a is at the position shown by a in FIG. 7, if the correction key 1a is operated on the keyboard 1, the print The head 21a moves as shown by the dotted arrow and temporarily stops at the position shown in FIG. 7b.

In this state, it moves from left to right as shown by the dotted arrow in the figure, and prints the first underline overlapping the letters "ABC" as shown in c of FIG.
Subsequently, the print head 21a is shifted slightly downward and moved from right to left to print a second underline over the letters "ABC" as shown in FIG. 7d. In this way, the correction mark "=" is printed over the characters "ABC".

Thereafter, the print head 21a moves as indicated by the arrow in the figure, returns to its original position before the start of correction, and stops, as shown at e in FIG. 7.

In this way, when using a wire dot type printing head, the correction mark "=" using two underlines is used to correct the previously printed character.
This can be clarified by Moreover, the printing head 21a
automatically returns to the original position before the start of correction after correcting the previous print data, so you can quickly start printing the next print data. is not a hassle.

In the above embodiments, a wire dot type printing head was described, but the present invention is not necessarily limited to this, and a thermal type printing head may be used.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a data printing device that can clearly correct previously printed data and can quickly start printing the next print data after correction printing. It is.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a block diagram, FIG. 3 is a diagram showing the configuration of print information, and FIG. 4 is a diagram showing the configuration of print data. Fig. 5 is a diagram showing print data converted for correction, Fig. 6 is a flowchart showing print correction processing by the printing CPU, and Fig. 7 is a diagram showing an example of the movement of the print head during correction. . 1a... Correction key, 3... Data printing device, 1
1... Main CPU, 18... Printing CPU, 20
...RAM, 21...printing mechanism, 21a...printing head.

Claims (1)

[Claims] 1. A data save area for correction that stores previously printed print data and information such as lines and columns attached to that print data, a correction key, and when the correction key is input, the lines and columns of the current print head are saved. data conversion means for saving information in memory and converting the actual print data in the correction data save area into an underline code; a correction mark printing processing means for printing an underline as a correction mark overlapping the previously printed character based on the underline code that has been moved to the printing position and converted; 1. A data printing apparatus comprising: a print head return means for returning said print head to its original position before the start of correction based on current line and column information.