JPS6092888A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To enhance efficiency of printing, by a method wherein correction of printing character data and correction of printing position data for a text are performed in the period over which printing is stopped by a printing-interrupting key, and printing is restarted on the basis of corrected data. CONSTITUTION:A keyboard 3 is provided with various function keys 19 such as the printing-interrupting key 18 and a correction key. A RAM5 is provided with a data buffer RA1, a text buffer RA2 for storing N texts 20, an area RA3 for storing LP.FLAG indicating a collective printing mode, an area RA4 for storing PO.FLAG indicating a momentarily stopped condition of a printing operation, and an area RA5 for storing DP indicating the address where the texts 20 are stored. Each of the texts 20 comprises an area RA6 for a one-character amount of data for a character or a space, an area RA7 for carriage address data indicating the printing position in terms of the address position of the carriage, and an area RA8 for data accompanied by the data in the area RA6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in an electronic typewriter that is capable of printing out character data manually entered in a storage unit and then printing them all at once.

[Technical background of the invention and its problems]

In an electronic typewriter, character data inputted from the character keys provided on the keypad is sequentially stored in an internal storage section, and the character data stored in the storage section is for example one line. Alternatively, there is a system in which the character data stored in the storage section is printed out all at once by a printing mechanism when the amount of data for several lines is reached.

However, in general, electronic typewriters such as those mentioned above
Once the printing operation is started, the printing operation can be interrupted until a predetermined number of lines have been printed.

Therefore, even if errors in printed characters, omissions, etc. are discovered during the printing operation, the errors, omissions, etc. cannot be corrected. Furthermore, it was not possible to change the centering position, tab position, etc. during the process. In such a case, after modifying the stored character data, etc., it is necessary to print out the data again from the beginning, resulting in a problem that the overall working efficiency of the electronic typewriter is reduced. There was also the problem that printing paper was wasted.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to be able to temporarily stop the printing operation, correct the character data etc. printed during the pause, and also to be able to correct the printed data after correction. An electronic typewriter that can improve overall printing efficiency by restarting operation.
Our goal is to provide the following.

[Summary of the invention]

The electronic typewriter of the present invention has a text buffer that stores a predetermined number of print lines of a plurality of texts consisting of character data input from the keyboard and print position data indicating the print position of this character data. ,
When the text is stored in the text buffer for the number of print lines, a printing mechanism is provided that prints out the character data of the text stored in the text buffer at a print position specified by the print position data. ing.

Then, the print output operation in the printing mechanism is temporarily stopped in response to the human input of the print interrupt key, and during this pause period, the character data that was printed out immediately before is corrected, and the unprinted characters in the text buffer are Correct the print position data of the text to which the data belongs. Thereafter, the printing operation by the printing mechanism is restarted in response to the human input of the printing restart key.

[Embodiments of the invention]

FIG. 1 is a block diagram showing an electronic typewriter according to an embodiment of the present invention.

In other words, 1 in the figure is a CPU (
central processing unit), this CPU 1 is data bus 2
The various key manual data inputted through the keypad 3 are processed according to the program stored in the ROM d, and are temporarily stored in the RAM S. Furthermore, the above CPU
1 is a paper feed shimmotor drive circuit 7.1 of the paper feed shimmotor 6 in accordance with a command signal manually inputted from a key on key date 3. Carriage motor drive circuit 9 for carriage motor 8. Print wheel motor drive circuit 11 of print wheel motor 10.
Operates the printing hammer/'t Hammer solenoid 12
A drive control signal is sent to each hammer solenoid drive circuit 13 of the hammer solenoid. Each of these motors 6.8, 10. Hammer solenoid 12. and each drive circuit 7, 9, 11.1
3 constitutes a printing mechanism.

As shown in the figure, the key bead 3 has, for example, English letters.
Character key 14 indicating a number of characters, etc. Space key 15. In addition to the return key 16 (hereinafter abbreviated as CR key), there is also a write key 17 for specifying the write mode. Printing interrupt key 18. Various function keys 19 are arranged. The printing interruption key 18 is also used as a printing restart key, and each time the key is pressed, a printing interruption command and a printing restart command are input alternately. The function key 19 also includes a correction key for erasing characters once printed.

These include dead keys that indicate various controls without printing space, 1/2 pax-e-sugi-1 automatic underline (auto underscore) key, and the like.

As shown in FIG. 2(a), the RAM 5 includes a data buffer RA1. Text (TEX) consisting of character data, etc.
Text buffer RA2.1 to TEX N )2o that stores N pieces. Area RAJ that stores LP and FLAG indicating the batch printing mode, PO and area RA that stores FLAG that indicates the temporary stop state of print output operation in the printing mechanism
G and an area RAS for storing DP (data point) indicating the storage address of the text 20 are formed. Each text (TEX) in the text buffer RAz
As shown in FIG. 2(b), 20 is an area RA6 for storing character data or space data for one character input using the character key 14 or the one key 15. Area R for storing carriage address data (CAAD) indicating the position as the address position of the carriage.
An area RA8 is formed to store data associated with data in area A7° and area RAc. For example, region R
An AUS flag indicating automatic underlining is stored at the address at the end of AS, and DK flags based on various dead keys are stored at the second and subsequent addresses. In this embodiment, one line is composed of N pieces of text 20 printed out on paper.

Therefore, the maximum value of DP (data point) is N.

When the power is turned on, the CPU 1 controls each part according to the flowcharts shown in FIGS. 3 to 8.

That is, start the main routine and read the RAM at Pl.
The status of LP and FRAG in area RA3 in B is checked, and if LP and FRAG indicating batch printing are not set, the process advances to P2. At P2, the key is -Writing key 1 which indicates the writing mode of mode 3? If is pressed, character data of - character is sent to text buffer RA, ? It is determined that the data point (DP), carry address data (CAAD), and n indicating the count value of CAAD are initialized. Next, at P3, a key input signal from the keyboard 3 is waited for, and it is checked whether the key input signal is from the CR key 16 or not. If it is not the CR key 16, it is checked to see if it is a correction key, and if it is a correction key, the text buffer RA of the text 20 contains the character data to be input;
? DP in the area RAS indicating the address within is counted down by one, and the count value n f of CAAD is counted down by one. In addition, if the key human input signal indicates a dead key, 2 of the area RAS of the text 20
Set the DK flag of the symmetric dead key after the address. Furthermore, if the key input signal indicates an automatic underline key, the AU8 flag at address 1 of the area RAS is set, and the CAAD (n) of this text 20 is set to the previous position CAAD (n-1). ) plus the character pitch length. Also, in the case of the 1/2 backspace key, change CAAD (n) to the current position CAAD (n)
Set to a value that is subtracted by 1/2 character pitch from . Furthermore, in the case of the character key 14 or the space key 15, the input data is directly transferred to the data pointer DP.

It is stored in the area RA6 of the text 20 indicating CAAD (n). When the above operations are completed, DP and n are displayed at P4.
Count up by one. Then, at P5, DP=N
That is, after confirming that no data is stored in the text 20 for all characters, the process returns to P3 and waits for a new key input signal from the keyboard 3. DP=N at P5j)
, P6 waits for the CR key 16 to be pressed manually, or when the CR key 16 is pressed at P3, it is determined that data storage in the text buffer RAJ is completed. Then, pre-processing of the carriage address such as margin position, tab set position, centering position, etc. is performed, and area R in RAM 5 indicating the batch printing mode.
After setting the LP and FLAG of A and 9, return to P1.

This time, since LP and FLAG have been set in Pl, the process advances to the printing operation routine PItCI in FIG. 4. That is, if the printing interrupt key 18 is not pressed at Pl,
At P8, it is confirmed that PO and FLAG indicating a pause state of the printing operation in area RA4 in RAM S are not set, and the process proceeds to PO. When DP has not reached the final address N at PO, read the character data or space data in area RA6 of text 20 at DP address and CAAD (
In addition to printing at the position specified by n), the area RAI
? Execute processing corresponding to each flag. After that DP
Count up by one and return to Pl.

Then, if there are no errors or omitted characters in the printed character data, and the print interruption key 18 is not pressed at Pl,
When DP=NK at PO, it is determined that the printing of all text 20 data has been completed. And in Plo L
Clear P and FLAG and terminate the program.

On the other hand, when the print interruption key 18 is pressed at P1,
After confirming that PO and FLAG have not yet been set in area RA4, set a new POlFLAG and P
Proceed to step 8. Po at P8.

After confirming that FLAG has been set, the program proceeds to the printing operation routine PR02 shown in FIG. Then, at Pl2, a key input is waited for to correct the character data or space data printed out immediately before the stop, and when the key input is input, the input data is temporarily stored in the data buffer RAZ of the RAM 5. Next, read this data and check the type of this data. Then, the above data is a character,
If the data indicates a space (-), it is determined that the omitted character is to be corrected, and the process proceeds to the PCHA routine shown in FIG. 6. That is, the character data or the space (-) data is printed out on paper. Then, after confirming that PO and FLAG are set in Pl3, text buffer 7RA,
? A value equivalent to one character pitch is uniformly added to CAA[) in each area RA7 of the remaining text 20 that has not yet been printed out. Therefore, this operation means that the blank character in the text buffer RAZ has been corrected. If the data in the data buffer RAJ indicates corrected data, it is determined that the erroneously printed character is to be erased, and the process proceeds to the PCOR routine shown in FIG. This P
In the COR routine, first confirm that PO and FLAG are set in Pl4, then erase the printed characters and erase the area RA6 of text 20 of the previous DP.
．． 7. Clear the data in B. And text buffer RA,? 1 from CAAD in each area RA7 of the remaining text 20 that has not been printed yet.
Uniformly subtract the value for character pitch. Therefore, by this operation, the typographical errors in the text puffer RA2 are erased and the subsequent characters are uniformly moved forward. If the data in the data buffer 7RAJ indicates CR data, it is determined that the printing operation should proceed to the next line, and the process proceeds to the PCB routine shown in FIG. After checking the setting status of PO and FLAG, cancel LP, FLAG and PO, FLAG and end the program. If the data in the data log RAI indicates other processing, the corresponding processing is executed at P16, and then the process returns to P1 of the main routine.

After completing the process other than the carriage return operation, return to P1 of the main routine and press the print interrupt key 1 again at P1.
Check whether 8 was pressed. When the above-mentioned correction key operation is completed, the printing interruption key 18 is naturally pressed to restart printing, so the process advances to Pll. At pH, since PO and FLAG have already been set when the print interruption key 18 was operated last time, the process proceeds to P9 after canceling PO and FLAG at P17. Then, with the operation after P9 mentioned above, the text buffer RA, ? Each character data or space data of the remaining text 20 that has not yet been printed out is printed out, and the program is terminated.

Next, a normal printing operation without batch printing will be explained. In other words, when printing a new line, always use LP and FLA.
Since G has been released, the process proceeds to P2 via Pl. In the case of normal printing at P2, since the write key 17 is not pressed, the process immediately proceeds to the printing operation routine PRC2 shown in FIG. 5. In the PRo 2 routine, in the same way as when modifying the data mentioned above, it waits for the key power to print out at Pl2,
When a key is input manually, the key input data is temporarily stored in the data pad 7A RAJ. Next, read this data and check the type of r-event. and PCI according to the type of data.
(Proceeds to the A, PCOR, and PCB routines, performs print output processing, correction (character deletion) processing, and carriage return processing, respectively, and then terminates the program and waits for the next key manual operation. However, this time, printing is interrupted. key 18
Since is not pressed, PO and FLAG are not set, and the CAAD correction process of text buffer RA2 is not executed.

In an electronic typewriter configured in this way, -
When a typist wants to print out a line of characters all at once, the first step is to press the key? - Press the write key 17 provided on the card 3. After that, character key 14. When data is entered manually by operating the space key 15 and various function keys 19, the entered data is sequentially created in the RAM 5 in the text buffer RA, ? each text 20
is stored in Then, when the key input for data for the - line is completed and the CR key 16 is pressed, the printing output operation of the character data, space data, etc. stored in the text buffer RAz is automatically started. , If you find an incorrect character, omitted character, etc. in the printed character during the printout operation, immediately press the print interruption key 18 to temporarily stop the printing operation.Then, by performing the same key operation as the normal printing operation, the above-mentioned When you erase typos, print correct characters, etc., the print position data (CAAD) that indicates the print position of data in the text buffer RA and ? that have not yet been printed out is automatically corrected. When the correction is completed, When the print interrupt key 18 is pressed again, the print output operation is restarted, and the remaining character data is printed at the correct corrected position.

With this type of electronic typewriter, if a typo or omitted character is discovered during printout, it is possible to temporarily stop the printout and correct the omitted or omitted character. Unlike conventional electronic typewriters, there is no need to wait for one line of printing to be completed. Furthermore, the printing operation can be resumed immediately after correction. Therefore, it is possible to improve the printing efficiency of the electronic typewriter as a whole. Furthermore, printing paper is not wasted. Also, by pressing the CR key 16 during correction,
It is also possible to cancel subsequent printing.

Note that the present invention is not limited to the embodiments described above. Although the printing interruption key 18 in the embodiment is a key serving as both a printing interruption key and a printing restart key, a printing restart key may be provided separately so that each key has an independent function.

Further, the numerical parts may be printed out at once.

〔Effect of the invention〕

As explained above, according to the present invention, when the printing mechanism discovers a typo, omitted character, etc. while printing out character data, etc. for one character at a time, it immediately stops the printout operation and immediately , omitted characters, etc. can be corrected, and the print output operation can be restarted after correction. Therefore, the printing efficiency of the electronic typewriter as a whole can be improved.

[Brief explanation of drawings]

The figures show an electronic typewriter according to an embodiment of the present invention. Fig. 1 is a block diagram, and Fig. 2 (,)
(b) is a main memory configuration diagram of the RAM, and FIGS. 3 to 8 are flowcharts showing operations. 1...CPU, 3...Key date, 5...RA
M, 6...Paper feed motor, 8...Caliper motor, 10...Print wheel motor, 12...Hammer solenoid, 14...Character key, 15...One key per space, 16 ...CR (carry, return) key,
17...Write key, 18...Print interrupt key, 1
9...Function key, 20...Text, R
Al: data buffer, RA2: text buffer, RA, 9 to RA8: area. Applicant's agent Patent attorney Takehiko Suzue Figure 5 Figure 6 Figure 6 7!1g Figure 8

Claims (1)

[Claims] A key having at least a character key for inputting character data, a printing interruption key, and a printing restart key, at least character data inputted from the said key from the first position, and print position data indicating the print position of this character data. a text buffer that stores a plurality of texts for a predetermined number of print lines; a printing mechanism that outputs a printout in a batch at a printing position specified by data; a temporary stop means that temporarily stops the printout operation of the printing mechanism in response to the human power of the print interruption key; a correction means for correcting character data printed out immediately before a pause during a period; and correction means for correcting the print position data of text including character data stored in the text buffer after the character data corrected by the correction means. and a restarting means for restarting the printing operation in the printing mechanism in response to the human power of the printing restart key. Typewriter-0