JPS62294579A - Printing apparatus - Google Patents

Abstract

PURPOSE:To perform the restoration printing of a character row erroneously erased by a simple operation, by performing the restoration printing of the character on and after the character, to which a printing head corresponds, in the character row erased at a printing position before erasure. CONSTITUTION:For example, when a printing head is moved from the position of a nineteenth figure to that of a twelfth figure and a collection key 23 is continuously to that of a twelfth figure and a collection key 23 is continuously pushed down to successively erase a character row 'EXAMPLE' in an anti- printing direction, the character row erased is stored in a collection data memory 116 corresponding to a printing position. Next, when the printing head is moved, for example, to the position of an eighth figure and a collection cancel key is operated, CPU46 reads a control program of restoration printing processing from a program memory 100 and the character row 'AMPLE' on and after the eighth figure in the character row 'EXAMPLE' stored in the memory 116 is subjected to restoration printing at a printing position before erasure and the data of the collection data memory 116 corresponding to the character row 'AMPLE' is erased.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a printing device, and in particular, in a printing device having an erasing mechanism for erasing characters, an erasure cancel command is used to erase characters.
It concerns something that makes it possible to restore erased character strings.

(Prior Art) In recent electronic typewriters, etc., the control device is equipped with a current position memory that stores the current position of the print head, and a print data memory that stores the data input and printed from the keyboard. Equipped with an erasing mechanism that sequentially erases a character string consisting of a set of characters printed using data from the current position memory and print data memory in the opposite printing direction using a correction ribbon in response to the operation of an erasing command key. There are many things.

When printing text or the like on printing paper using a printing device equipped with this type of erasing mechanism, if the character string is erased due to an erroneous operation or the like, it is necessary to print the character string again. For example, Japanese Patent Application Laid-open No. 57-151386 discloses an output cover sofa that stores data of printed characters equivalent to about two lines, a collect buffer that stores data of erased character strings, a key code register, and various other devices. A register and a buffer are provided, and the character symbol corresponding to the operated character symbol key is printed, and the data of that character symbol is stored in the output buffer via the key code register, and the print head is activated by operating the erase key from the keyboard. Delete the character corresponding to , or use the erase key and repeat key together to automatically delete consecutive character strings in the opposite printing direction, store the erased character string data in the collect buffer, and print it as necessary. A typewriter is described in which, by operating a key, a character string corresponding to data stored in a collect buffer is automatically restored and printed in the printing direction from the current position of the print head.

(Problem to be Solved by the Invention) In the typewriter described in the above-mentioned Publication G, when consecutive character strings are automatically erased by using the erase key and the repeat key in combination, the character string following the string to be erased due to an erroneous operation. Even character strings that do not need to be deleted may be deleted.

In the above case, the character string that was mistakenly erased will need to be reprinted by key operation, or the entire character string will be reprinted at the print position before erasing, and only the character string that was mistakenly printed again will be erased. However, there is a problem that the operation becomes complicated and complicated, and the work efficiency decreases.

In addition, when reprinting a character string erased by mistake at the print position before erasing, use the backspace key or space key to move the print head to the first print position of the erased character string, and then resume printing. Therefore, there is a problem that the operation of performing restoration printing is troublesome and time-consuming.

(Objective of the Invention) The object of the present invention is to be able to restore or automatically print characters after the print position corresponding to the print head among character strings that have been erased by mistake due to an operational error, at the print position before erasing. To provide a printing device capable of restoring and printing characters after the first character of an erased character string at the print position before erasing by setting a print head to a bank space.

(Means for solving the problem) As shown in the functional block diagram of FIG. 1, the printing device according to the first invention of the present application has a printing mechanism that prints characters or symbols, etc. corresponding to input data on printing paper. , a print data memory that stores the printed data in correspondence with the print position, a current position memory that stores the current position of the print head of the printing mechanism in correspondence with the print position, and is activated upon input of an erase command signal. an erasing mechanism that erases a character string consisting of a set of characters by sequentially erasing the characters printed by the printing mechanism; An erase data memory is provided to store the data of the erased character string in correspondence with the print position, and when the print head receives the erase cancel command signal, the print position of any character of the erased character string before erasing is provided. If it is compatible with
By controlling the printing mechanism based on the data in the current position memory and the data in the erased data memory, characters subsequent to the character corresponding to the print head of the erased character string are restored and printed at the print position before erasing. A restoration printing control means is provided.

As shown in the functional block diagram of FIG. 1, the printing device according to the second invention of the present application is a printing device having the same basic configuration as the first invention, in which a character string is erased by an erasing mechanism based on an erasing command signal. An erasing data memory is provided for storing the data in correspondence with the printing position, and when the erasing cancel command signal is received, the print head erases the data corresponding to the printing position of any character in the erased character string before erasing. If so, the print head is moved to the print position of the first character of the erased character string by controlling the print mechanism based on the data in the current position memory and the data in the erase data memory. The present invention is provided with a restoration printing control means for restoring and printing characters after the first character of the character string at the printing position before erasure.

(Function) In the printing device according to the first invention of the present application, the print data memory stores the data printed on the print paper by the printing mechanism in correspondence with the print position, and the current position memory stores the current position of the print head. It is stored in correspondence with the position.

When the erasing mechanism receives an erasing command signal, it sequentially erases the printed characters based on the data in the print data memory and the data in the current position memory, thereby creating a character string (1 (even just the characters are fine). The data of the erased character string is stored in the erased data memory in correspondence with the print position.

When the restoration print control means receives an erase cancellation command signal, if the print head corresponds to the print position of any character in the erased character string before erasing, the data in the current position memory and the data in the erased data memory are The printing mechanism is controlled based on the erased character string, and characters subsequent to the character corresponding to the erased character string are restored and printed at the print position before erasure.

The printing device according to the second invention of the present application operates in the same manner as the first invention, but differs in the following points.

That is, the restoration printing control means controls the printing mechanism based on the data in the current position memory and the erased data memory, moves the print head to the printing position of the first character of the erased character string, and prints the first character of the erased character string. Subsequent characters are restored and printed at the print position before erasing.

(Effects of the Invention) According to the printing device according to the first invention of the present application, as explained above, characters subsequent to the character corresponding to the print head in the erased character string are restored and printed at the printing position before erasure. , when a character string that does not need to be erased that follows the lower part of the character string that should be erased is also erased by mistake, it is easy to move the print head to the beginning of the character string that was erased by mistake. Erroneously erased character strings can be restored and printed by operation.

Since data of erased character strings is stored in the erased data memory in correspondence with the print position, the control for associating the print positions for restoring and printing mistakenly erased character strings does not become complicated, and the operation is easy. You can improve your sexuality.

According to the printing device according to the second invention of the present application, as explained above, the print head is automatically moved to the printing position of the first character of the mistakenly erased character string, and the characters after the first character of the mistakenly erased character string are printed. Since it is now possible to restore print to the print position before erasing, when reprinting the entire character string that was erased by mistake to the print position before erasing, the print head must be moved before any character in the character string that was erased by mistake is erased. Restoration printing can be performed by a simple operation of moving the printer to a position corresponding to the printing position.

Since the data of erased character strings is stored in the erased data memory in correspondence with the print position, the control for associating the print positions where the mistakenly erased character strings are to be restored and printed does not become complicated. Operability can be improved.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the present invention is applied to an electronic typewriter 1, and by operating a collection key 23 for erasing characters provided on the keyboard 3 of the typewriter 1, a collection of erroneously printed characters can be deleted. When a character string is erased by an erasing mechanism equipped with a correction ribbon 20, the erased character string can be restored and printed as necessary, such as when it is realized that the erasure was erroneous.

In the first invention, the print head at the time of the erasure cancellation command is configured to revive and print the characters after the character that was printed at the corresponding print position, and in the second invention, the print head is moved to print the erased characters. The first character of the column is moved to the printing position where it was printed, and then the first character is restored and printed one by one from that first character.

At the front of the main body frame 2 of the typewriter 1, there is a second
As shown in the figure, a keyboard 3 is arranged, and a printing mechanism is arranged inside the main body frame 2 behind the keyboard 3.

The keyboard 3 is provided with the following various keys. Namely, character keys including an alphabet key 4, a numeric key 5, and a symbol key 6, a space key 7, a backspace key 8, a return key 9, a shift key 10, a code key 11, a left margin cent key 12, and a right margin cent key 13. , tab set key 14, tab clear key 1
5, tab key 16, paper feed key 18, return key 19,
A repeat key 20, a cursor movement key 22 for moving a cursor indicating a data input position on the display 21, a correction key 23 for outputting an erase command signal, a correction cancel key for restoring erased character strings to be printed on the printing paper 17. For example, the key 60.

The functions obtained by operating the various function keys described above are the same as those of existing typewriters, so description thereof will be omitted.

A display 21 is provided at the rear of the keyboard 3 for displaying characters and symbols input by operating the character keys 4, 5, 6, the space key 7, and the like. The platen 24 is arranged in the left-right direction of the main body frame 2,
It is rotated automatically or manually by a platen drive motor 25 or a platen knob 26 to feed the printing paper 17.

The carriage 27 is supported by two guide shafts 29 and 30 provided parallel to the platen shaft 28, as shown in FIG. It is moved back and forth in the left and right directions along the line.

A type wheel drive motor 34 for driving a type wheel 33 is disposed on the carriage 27, and the type wheel 33 housed in a wheel cassette 35 is mounted on the motor shaft.
is removably attached and rotationally driven, and the type wheel 3
30 The printed character 36 at the tip of the selected spoke is placed in a printing position opposite the printing hammer 37. The printing hammer 37 is mounted on the top of the carriage 27, and its printing hammer solenoid 38 is driven by a drive current from a printing hammer solenoid driver 39, which will be described later, so as to strike the type 36 set at the printing position against the printing paper 17. It has become.

The ribbon cassette 41 containing the printing ribbon 40 is placed on a holder 42, the front end of the holder 42 is rotatably attached to the carriage 27, and the printing ribbon 40 is supplied from the supply spool of the ribbon cassette 41. The ribbon is wound onto a take-up spool, and the take-up spool is driven by a ribbon feed motor 43. In addition, the holder 42
A correction ribbon 44 is provided at a lower portion at the rear of the camera. That is, a supply spool for supplying the correction ribbon 44 is provided on the right side of the ribbon cassette 41, and a take-up spool for winding the correction ribbon 44 is provided on the left side of the ribbon cassette 41.

Furthermore, the printing ribbon 40 is moved to the printing position 3.
6 and the platen 24 (see Fig. 3), the body stop position W (path shown) in which the printing ribbon 40 is moved below the printing position, and the correction ribbon 44 are printed. In order to switch the position to the correction position (see FIG. 4) located between the printing type 36 in the position and the platen 24, the above-mentioned A cam mechanism (path shown) for swinging the holder 42 to the three positions is mounted on the carriage 27.

The correction ribbon 44 is also attached to the carriage 27 and the holder 42 as the holder 42 swings to the correction position.
A correction ribbon winding mechanism (path shown) is provided for winding the correction ribbon from the supply spool to the take-up spool.

Therefore, the printing mechanism includes the platen 24 and the platen drive, the carriage 27 and the carriage drive, the type wheel 33 and the type wheel drive, the print ribbon 40 and the ribbon feed drive, and the print ribbon 40 and the correction ribbon 44. It is composed of a cam mechanism and its driving device for swinging to the printing position, a printing hammer 37, a printing hammer driving device, etc., and each driving device of the printing mechanism is connected to a CPU (central processing unit) 46 of a control device.

Next, the overall configuration of the control system of the typewriter 1 will be explained based on the block diagram of FIG. 5.

The driving means PM of the printing mechanism is a platen driving motor 2.
5, its driver 47, and carriage drive motor 31
and its driver 4, a ribbon feed motor 43 and its driver 49, a ribbon lift motor 45 and its driver 50, a type wheel drive motor 34 and its driver 51, a printing hammer solenoid 38 and its driver 39, etc. has been done.

The display device is composed of a display 21 consisting of a liquid crystal display and a display controller 52. The display controller 52 stores display data for displaying characters, etc. on the display 21 in correspondence with code data of each character or symbol. The display controller 52 outputs display data corresponding to code data input to the display controller 52 to the display 21.

The control device C includes a CPU 46, a ROM (read only memory) 53 and a RAM connected to the CPU 46.
(random access memory) 54, and the keyboard 3, each of the drivers 39, 47 to 51 of the driving means PM, and a display controller 52 are connected to the CPU 46.

The ROM 53 contains character keys 4, 5, and
6 and the space key 7, etc., or code data read from the print data memory 110, each of the motors 25 and 31
・A control program for controlling 34, 43, 45, printing hammer solenoid 38 and display 21, and a control program for controlling each of the motors 25, 31, 34, 43. 4
A program memory 100 is provided which stores a control program for controlling the printing hammer solenoid 38 and the printing hammer solenoid 38, a control program for character erasing control, a control program for restoration printing control to be described later, and the like.

The RAM 54 includes a print data memory 110 that sequentially stores printed data in correspondence with the print position, a current position memory 112 that stores the current position of the carriage 27 in correspondence with the print position, and a type wheel 33. A type position memory 114 that stores the spoke number of the type 36 at the current rotation angle position, that is, the print position, a collection data memory 116 that stores data of erased character strings in correspondence with the print position, and the CPU 46 performs calculations. Various types of memories are provided to temporarily store processed results.

The CPU 46 uses character keys 4, 5, and 6 of the keyboard 3.
The printing mechanism prints on the printing paper 17 based on the code data corresponding to each character and symbol such as alphabets, numbers, spaces, and symbols inputted from the space key 7, and the printed data is set as the printing position. Correspond to RAM
54 print data memory 110, and the current position data that changes each time the carriage drive motor 31 or type wheel drive motor 34 is driven is stored in the RAM 5.
4 is stored in the current position memory 112 and type position memory 114.

Then, the CPU 46 processes the code data inputted from various function keys of the keyboard 3 with the control program read from the program memory 100 of the ROM 53, thereby transmitting control signals corresponding to the input code data to each of the drivers 39, 47 to 51. or display controller 5
Output to 2.

Furthermore, the CPU 46 uses character keys 4, 5, and 6 on the keyboard 3.
The code data input from the space key 7 or the code data of characters and symbols read from the print data memory 110 are processed by the control program read from the program memory 100 of the ROM 53. Thereby, a control signal corresponding to the code data is outputted to each driver 39, 47 to 51 of the printing mechanism driving means PM and the display controller 52, thereby controlling the printing mechanism and the display device.

That is, when controlling the printing mechanism driving means PM based on code data, a control signal is output from the CPU 46 to the type wheel drive motor driver 51, and a drive current is output from the type wheel drive motor driver 51 to the type wheel drive motor 34. Ru.

Then, the type wheel drive motor 34 rotates by a predetermined angle, and the type 3 of the type wheel 33 corresponding to the code data is rotated.
6 is placed in the printing position in front of the printing hammer 37, a control signal is output from the CPU 46 to the ribbon lift motor driver 50, a drive current is output from the lift lift motor driver 50 to the ribbon lift motor 45, and the ribbon is lifted. The rotation of the motor 45 causes the holder 42 and the printing ribbon 40 to move to the third position via the drive shaft and cam mechanism.
It is driven to swing to the printing position shown in the figure.

Next, the CPU 46 sends the print hammer solenoid driver 3
When a control signal is output to the print hammer solenoid driver 39 , a drive current is output to the print hammer solenoid 38 , and the print hammer 37 hits the type 36 of the type wheel 33 , causing characters and characters to be printed on the print paper 17 . The symbol will be printed.

If there is no next key manpower within a predetermined time, C
A control signal is output from the PU 46 to the ribbon lift motor driver 50, the ribbon lift motor 45 rotates, and the holder 42 and print ribbon 40 are returned to the rest position. Furthermore, control signals are output from the CPU 46 to the carriage drive motor driver 48 and the ribbon feed motor driver 49, respectively.

On the other hand, a drive current is output from the carriage drive motor driver 48 to the carriage drive motor 31, the carriage drive motor 31 rotates by a predetermined amount, and the carriage 27 is moved in the printing direction by one character via the wire 32. On the other hand, a drive current is output from the ribbon feed motor driver 49 to the ribbon feed motor 43, and the ribbon feed motor 43 rotates by a predetermined amount to feed the printing ribbon 40.

When the return key 9 is operated, the CPU 46 processes the code data from the keyboard 3 using the control program read from the program memory 100 of the ROM 53, thereby sending control signals to the carriage drive motor driver 48 and the platen drive motor driver 47. Output.

Then, a drive current is output from the carriage drive motor driver 48 to the carriage drive motor 31, and the carriage drive motor 31 rotates in the reverse direction to return the carriage 27 to the print starting position. At the same time, a drive current is output from the platen drive motor driver 47 to the platen drive motor 25, the platen drive motor 25 rotates by a predetermined amount, and the printing paper 17 is fed by one line.

Furthermore, when erasing characters by operating the correction key 23, the CPU 46 erases characters from the program memory 100 of the ROM 53.
When a control program for erasing characters is read in and a control signal is output to the ribbon lift motor driver 50, the ribbon lift motor 45 is rotated and the holder 42 is oscillatedly driven to the correction position shown in FIG. And CPU46 is RAM5
Based on the data in the current position memory 112 of 4, the print data memory 110 corresponding to the print position of the print head is sequentially read out.
A control signal is output to the type wheel drive motor 34.
The type wheel 33 is rotated, and the type 36, which is the same as the character or symbol to be erased, is located at the print position, and the drive current from the print hammer solenoid driver 39 drives the print hammer solenoid 38, and the print hammer 37 is struck. , the printed characters on the printing paper 17 are erased.

Note that when the code key 11 and the correction key 23 are operated at the same time, the printing device is controlled as described above, and the words corresponding to the print head are printed word by word in order from the last character in the opposite printing direction. It will be erased from time to time.

By the way, the printing device of the first invention of the present application stores data of a character string erased (corrected) by operating the correction key 23 in the correction data memory 116 in correspondence with the printing position, and by operating the collection cancel key 60. , collection data memory 116
Based on the data stored in the collection cancel command, the print head prints the characters that were printed at the corresponding print position again, based on the data stored in the data stored in the print head. In order to do this, an overview of restoration printing control will be explained.

FIG. 6(a) - As an example, rTHE EXAMPL
The character string printed as E PRINTJ, the data in the print data memory 110, and the collection data memory 11
6 is visually illustrated in correspondence with the data in 6.

As shown in FIG. 6 (1)), move the print head from the 19th digit Ho position to the 12th digit, press the correction key 23 continuously, and print the character string r from the 12th digit to the 6th digit.
Delete EXAMPLEJ. At this time, the CPU 46 reads the erasure processing control program from the program memory 100, and repeatedly prints the same character via the correction ribbon 44 over the print character at the print position corresponding to the current print head. The columns rEXAMPLEJ are sequentially erased in the opposite printing direction. Then, erased character string rE
XAMPLEJ is stored in the collection data memory 116 in correspondence with the print position.

Next, when the print head is moved to, for example, the 8th digit (position H) and the collection cancel key 60 is operated,
As shown in FIG. 6(C), the CPU 46 reads the control program for the restoration printing process from the program memory 100, and reads the character string rA after the 8th digit of the character string rEXAMPLEJ stored in the collection data memory 116.
MPLE" is restored and printed at the print position before erasing.

Then, the data in the collection data memory 116 corresponding to the restored and printed character string rAMPLEJ is erased.

Note that the character string refers to one character or a set of a plurality of characters, that is, a part of a word or a set of one word or a plurality of words. Therefore, there are character strings that span one print line,
As a special case, a string of one character can also be used.

Next, the routine for controlling the restoration printing process performed by the control device of the electronic typewriter 1 will be explained with reference to the flowcharts shown in FIGS. 7 and 8.

This control is started when the typewriter is powered on, and initial settings are made in step Sl (hereinafter simply referred to as 81, and other steps are handled in the same manner).

Then, in S2, it is determined whether there is any key force (whether or not a key on the keyboard 3 has been operated), and if the key is not operated, 82 is repeated at minute intervals until the key is operated. Then it moves to 83.

In S3, it is determined whether character keys 4, 5, or 6 were operated, and if YES, the process moves to S4, and in S4, the characters or symbols corresponding to the operated character keys 4, 5, or 6 are printed. The information is printed on paper 17 and the process returns to S2.

In the above case, the CPU 46 stores the code data input from the various character keys 4, 5, and 6 of the keyboard 3 in the ROM 5.
A control program corresponding to the input code data is processed by the control program read from the program memory 100 of No. 3. The H signal is sent to each driver 39 of the printing mechanism driving means PM.
Output to 47-51.

In addition, if the determination result of S3 is No, that is, character keys 4 and 5
- When a key other than 6 is operated, it is determined in S5 whether or not it is the collection key 263, and if YES, the process moves to S6, and if NO, the process moves to S8.

In S6, the erasing process is executed based on the data in the current position memory 112, the data in the print position memory 114, and the data in the print data memory 110. In the case of this erasing process, if the correction key 23 is held down, the self-repeat function of the correction key 23 will start character erasing from the printed character corresponding to the print head, and character erasing will be executed continuously in the opposite printing direction, and the correction When the key 23 is operated once, only one character is deleted.

Although not shown in the flowchart, when the collection key 23 and the code key 11 are operated at the same time, erasure is executed in units of words corresponding to the print head.

In the next step 87, the correction data corresponding to the erased character erased in S6 is stored in the correction data memory 116 in correspondence with the print position, and the process returns to S2.

When a key other than the character keys 4, 5, and 6 and the collection key 23 is operated, it is determined in S8 whether or not the correction cancel key 60 is operated, and if it is the correction cancel key, the process moves to S9 and a restoration printing process is executed. If it is not the collection cancel key 60, the process moves to SIO and the process corresponding to the operated function key is performed.

The routine of the restoration printing process in S9 will be explained with reference to the flowchart of FIG. 8. In S20,
Based on the data in the current position memory 112 and the data in the collection data memory 116, the current position of the print head corresponds to the erased print position or not, that is, the print position of any character in the erased character string before erasing. It is determined whether or not the printing position has been erased, and if it is the erased printing position, the process moves to 321.
If the print position is not the erased print position, the process moves to S26, where an alarm process for displaying an alarm on a buzzer, alarm lamp, etc. is executed, and the process returns from S26 to 82.

In S21, data in the correction data memory 116 corresponding to the current position of the print head is read based on the data in the current position memory 112 and the data in the correction data memory 116. In the next 322, S
Collection data memory 116 read in 21
The characters corresponding to the data are printed again. in this case,
CPU 46 outputs control signals to ribbon lift motor driver 50, ribbon feed motor driver 49, type wheel drive motor driver 51, and print hammer solenoid driver 39.

Then, in S23, the data in the collection data memory 116 corresponding to the characters restored and printed in 322 is erased. Next, at 324, the print head is moved to the next lower printing position (in the printing direction). In this case, C.P.
U46 outputs a control signal to carriage drive motor driver 48.

In the next step 325, it is determined whether the current position of the print head is the erased print position, and if it is the erased print position, the process moves to S21, and if it is not the erased print position, the process returns to S2. That is, when a character string of a plurality of characters is revived and printed, steps 321 to S25 are repeated, and when the last character of the character string is revived and printed, a negative determination is made in S25, and the process returns to S2.

As explained above, in the restoration printing control of the first invention, it is possible to restore and print characters after any arbitrary character in the erased character string.

Next, a modification of the restoration printing control of the first invention will be described.

A second collection data memory is provided in the RAM 54, and by operating the collection cancel key 60 and the code key 11 with the print head set at the print position of the desired character of the erased character string before erasing, the desired character can be read. After storing the data of the character string after the character in the second collection data memory without making it correspond to the print position, move the print head to the desired print position of the erased character string, and operate the collection cancel key 60. The configuration is such that the data in the second collection data memory is restored and printed.

In this case, it becomes possible to repeatedly restore and print part or all of the erased character string at a desired printing position.

Note that if the code key 11 and the collection key 23 are operated simultaneously and the correction cancel key 60 is operated while erasure is being executed in units of words, the erasing operation will be stopped midway and the erased characters will be erased. It may also be arranged to be restored and printed at the original position.

By the way, the printing device of the second invention of the present application automatically moves the print head to the printing position where the first character of the erased character string was printed, and then resumes printing in order from the first character. This differs from the printing apparatus of the first invention only in the routine of the restoration printing process.

Next, the routine of the restoration printing process of the printing device of the second invention will be explained based on the flowchart of FIG. 9.
Since steps 20 to S26 are the same as those in the eighth flowchart, the explanation thereof will be omitted, and the added steps 530 to 331 will be explained.

When the current position of the print head when the collection cancel key 60 is operated is the erased print position, the process moves from S20 to 330, and in S30, the data in the current position memory 112 and the correction data memory 11
Based on the data of 6, it is determined whether the print position one level above the current print head (in the opposite print direction) is the erased print position, and if it is the erased print position, the process moves to 331.

In the next step 331, the carriage drive motor driver 4
8, the print head is moved to the next higher printing position, and the process returns to S30.

Then, when the print head reaches the print position of the first character of the character string by repeating steps 830 to S31, a negative determination is made in S30, and the process moves from S30 to 321, and the steps from S21 onwards are executed, and the erased character string is printed. The characters are revived and printed in order starting from the first character.

Incidentally, although the above embodiment describes a typewriter equipped with a decimal wheel type printer, the present invention can be similarly applied to a typewriter equipped with a thermal printer or a typewriter equipped with a type ball type printer. Of course.

[Brief explanation of drawings]

Figure 1 is a functional block diagram showing the configuration of the present invention, Figures 2-
Fig. 9 shows an embodiment of the present invention, Fig. 2 is a perspective view of an electronic typewriter, Fig. 3 is a vertical partial side view showing the main parts of the electronic typewriter, and Fig. 4 shows the holder in the corrected position. Figure 3 is a diagram equivalent to erasing printed characters with a correction ribbon, Figure 5 is a block diagram of the control system of a typewriter, and Figures 6 (a) to (C) are diagrams showing each process from collection to restoration printing. A diagram illustrating the relationship between printed characters, data in the print data memory, and data in the collection data memory at each step, FIG. 7 is a schematic flowchart of a control routine for restoration printing control, and FIG. 8 is a restoration print control routine according to the first invention. Flowchart of print processing routine. FIG. 9 is a flowchart of a restoration print processing routine according to the second invention. C: Control device, PM: Printing mechanism driving means, 3.
・Keyboard, 23・・Collection key, 24・
・Platen, 27.. Carriage, 33.. Type wheel, 37.. Print hammer, 40.. Print ribbon, 44.. Correction ribbon, 46.-CPU (central processing unit), 53.. ROM (read-only). ·memory)
, 54...RAM (random access memory),
60... Collection cancel key, 100...
・Print data memory, 112...Current position memory,
116... Collection data memory. Patent applicant Brother Industries, Ltd. Figure 1 Figure 4, 4 Figure 2 So Figure 3 Figure 8 Figure 9

Claims (2)

[Claims] (1) A printing mechanism that prints characters or symbols, etc. corresponding to input data on printing paper; a print data memory that stores the printed data in correspondence with printing positions; and a print head of the printing mechanism. A current position memory that stores the current position in correspondence with a printing position, and a character string consisting of a set of characters that starts operating upon input of an erase command signal and sequentially erases the characters printed by the printing mechanism. an erasing mechanism for erasing data, an erasing data memory that stores data of a character string erased by the erasing mechanism based on an erasing command signal in correspondence with a print position; and an erasing cancel command signal. If the print head corresponds to the print position of any character in the erased character string before erasure, the print head prints the print position based on the data in the current position memory and the data in the erase data memory. A printing device characterized by comprising: a restoration printing control means that controls a mechanism to restore and print characters subsequent to the character corresponding to the print head of the erased character string at the printing position before erasure. . (2) a printing mechanism that prints characters or symbols, etc. corresponding to input data on printing paper; a print data memory that stores the printed data in correspondence with printing positions; and a print head of the printing mechanism. A current position memory that stores the current position in correspondence with a printing position, and a character string consisting of a set of characters that starts operating upon input of an erase command signal and sequentially erases the characters printed by the printing mechanism. an erasing mechanism for erasing data, an erasing data memory that stores data of a character string erased by the erasing mechanism based on an erasing command signal in correspondence with a print position; and an erasing cancel command signal. If the print head corresponds to the print position of any character in the erased character string before erasure, the print head prints the print position based on the data in the current position memory and the data in the erase data memory. Restoration printing control that moves the print head to the print position of the first character of the erased character string and revives and prints the characters after the first character of the erased character string at the print position before erasing by controlling a mechanism. A printing device characterized by comprising means.