JPH0143638B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic typewriter having a printing member positioning device and a device for controlling such a positioning device, in particular for centering and inserting text into blank spaces. The present invention relates to an electronic typewriter with functions.

BACKGROUND OF THE INVENTION Electronic typewriters are well known which are equipped with a device for positioning a printing member and which are controlled by a program of operating commands and which enable printing at a plurality of predetermined points on a record carrier. These typewriters are generally expensive and require calculations or complex operations to achieve the desired performance. This is extremely disadvantageous, especially when printing with differential pitch.

Further, it is difficult to erase a portion of the incorrectly inputted text among the inputted text and then insert the correct text centered on the previously printed characters. Difficulties arise especially when the width of the inserted text is close to the width of the blank space after erasure.

It is an object of the present invention to be relatively inexpensive and simple to use, yet provide a printing member positioning device and automatically perform the more complex functions of editing the text printed on the first input. The purpose of the present invention is to provide an electronic typewriter that can perform

Another object of the present invention is to provide the ability to automatically center and insert text into blank spaces contained between printed spaces without any manual fixing of blank space limits. To provide an electronic typewriter that is easy to use.

In order to achieve the above object, the present invention provides an electronic typewriter including a platen defining a print line having a plurality of print positions; The printing line has a blank area available for printing at the printing position, and a printing unit is operable to print characters entered at the printing position, and the printing unit is operable to move the printing unit in front of the blank area. control spacing means, a memory having a storage location, preset means operable to a preset state in which the character code of the input character is stored in the storage location without printing the input character; Printing control means operable to read the stored character code and cause the printing unit to print the inputted character centered on the blank area.

Further, in the electronic typewriter of the present invention, the printing line has two printed areas adjacent to the blank area in use, and the storage location of the memory is related to the printing position of the blank area. and a first location group storing a space code related to the printing position of the blank area, and a character of the printed characters of the two printed areas that is related to the printing position of the two printed areas. and two other locations for storing the code.

Furthermore, the electronic typewriter of the invention includes a current position memory for storing position signals associated with the current position of said printing unit along a print line, each position signal being stored in one of said memory locations. Associated with each printed character is a memory associated with a unit of space along a print line and, responsive to said preset state and said position signal, one of said memory locations relative to the current position of said printing unit. access the
first means for verifying whether the accessed location corresponds to one location of the first group of locations and for indicating that the printing unit is exactly in front of the printing location in the blank area; preset state and
and in response to a verified position of the printing unit in front of the blank area, print a newly input character in the blank space a minimum blank space apart from a printed area adjacent to the blank area. second means for further verifying whether the newly input character is printable; and responsive to the verified printability of the newly input character, subsequent actuation of the print control means and centering of the newly input character. a third storing the character code of the newly input character in one location of the first location group for printing;
and the means for

The first typewriter 10 is a British patent application no.
7924955 and comprises an alphanumeric keyboard 20, a control console 22, a display 21, a platen 26, a serial printing unit 25 and an electronic control unit 50 (FIG. 2).

The platen 26 is rotated with a row spacing by a motor 23, and the unit 25 is stepped parallel to the printing roller 26 on a guide 27 by a motor 24 acting on a wire 31. The unit 25 includes a daisy wheel type character carrying member 28,
Consisting of a hammer 30 and a ribbon 33, the member 28
motor 2 to select the characters to be printed.
9, the ribbon 33 is carried by a cartridge 32 and lifted by a printing operation by a solenoid 34. The unit 25 further includes a correction ribbon 39 which is lifted by a correction action by a solenoid 38. Control unit 50 (FIG. 2), on the other hand, is of the type disclosed in the applicant's earlier application.

Referring to FIG. 3, the keyboard 20 has the following operation keys in addition to normal character-numeric keys 57. Margin set and memory key 58, margin rear key 59, tab stop cancel key (TAB-CLEAR) 61, tab stop set key (TABSET) 77, centering key (CENTER) 70, tabulation key (TAB) 78, repeat key (REPEAT) 62, space bar key 65, carriage return key with line space (RETURN) 60, carriage return key without line space (INDEX) 67, single character return operation key (BACK SPACE) 66, cancel key (CANCEL) 64, page Layout selection key (P)
69, set phrase selection key (M) 71, line form selection key (LINE FORM) 72. Furthermore,
The keyboard 20 includes an encoding and high-speed operation key (EXPRESS) 76, a column layout key (COLUMN LAYOUT) 73, a page end key (PAGE END) 74, and a relocation key (RELOC).
It has 75. The operations of these keys will be described later.

Unit 50 (FIG. 2) includes a microprocessor 100, two control units 115 and 119 for motor 24 and selection motor 29, hammer 30 and solenoids 34 and 38, actuation circuit 133 for motor 23, delay unit 51, control console 2
2. It consists of a keyboard encoder (KBE) 138 and a control circuit 139 for the display device 21.

The microprocessor 100 is well known and includes a central unit (CPU) 101, two ROMs 102 for storing sequences of microinstructions, two working RAMs 106 for temporarily storing data, and input/output units (I/O) 111 and 112 for the exchange of data and commands with logic units 115, 119, 133, 138 and 22. The unit 50 further includes a RAM 105 made non-volatile by a backup battery 103.

The console 22 has keys 83 (FIG. 1) for turning the typewriter on and off and for changing the line spacing pitch from one basic line space, two basic line spaces, three basic line spaces, or four basic line spaces. a selection device 81 (FIG. 3) for selecting, a selection device 80 for selecting one from 2.5 mm, 2.1 mm, 1.7 mm or proportional spacing, and a typewriter for recording data in non-volatile memory 106; It includes a selection device 90 for selecting between the STORAGE state and the typewriter state TPWR for normal printing.

Memory 106 stores unit 2 for two lines of characters.
The buffer has a capacity to store 5 positions. This buffer stores the code of the symbol introduced by the keyboard and printed, or the code of the symbol printed by the typewriter during the process of being printed on the line being set or on the previous line. These codes are used especially when a character is underlined, bold, or overlaps the next character, and when the character is a space or is printed in a special style. Fixes the information needed to mark the character that occupies that position when it should be displayed.

Non-volatile memory 105 stores the parameters of the current model or standard row (the last row used), the parameters of at least three model rows that are used more recently than the previous one, roller 26
the number of spaces for the automatic loading of sheets into the page, and the data associated with signaling end of page. memory 105
It also has a section that can contain a set phrase and a series of characters and/or instructions for the page form. This portion can be subdivided into 10 locations for set data and 10 locations for model pages, with variable capacity for each location having a capacity comparable to the total capacity expected for this portion of memory. It is configured to have Either the set phrase or page form is selected by actuating the corresponding set phrase selection key 71 or line form selection key 72;
The desired number of memories follows this.

The display device 21 has a capacity of two characters, and the number 0
Some symbols and alphanumeric characters can be displayed in both positions besides ~9. This display is used as a guide for the operator and provides useful information during various operating conditions of the typewriter. The main function of this display is that of a character subtraction counter, especially to inform the operator of the available print area.

In the TPWR mode of operation, information regarding the positioning of the printing unit 25 and therefore the position of the margins and stops is retrieved from a predetermined area of the memory 105. When the typewriter is turned on, the last model line used is always selected. That is, the line that existed when the typewriter was previously turned off and was stored in the "current line" location of memory 105 is selected. In the absence of line form parameters, the typewriter automatically fixes the left and right margins based on the physical margins of the unit 25.

The current model row can replace one previously stored in this non-volatile memory. This is done by pressing the row form key 72 (FIG. 3), immediately followed by the numbers 1, 2, 3 corresponding to the desired model row. The typewriter then automatically swaps the parameters of the current line with those stored in the called position,
This then becomes the new current row. unit 2
5 is located at the left edge of this new model row.

The display device 21 performs the function of a character subtraction counter, so that the numbers present upon actuation of the line forms 1, 2, 3 correspond to the spaces selected by the selection device 80 in this new model line. Replaced with a number related to the number of characters allowed.

Model lines can be changed and/or replaced by the appropriate TPWR mode of operation of the typewriter and by appropriate keyboard operations during the TPWR mode of operation of the typewriter. In particular, canceling the entire margins and stops for the current row is accomplished by activating the row form key 72 and the CANCEL key 64 at any point within the row. This also positions the print head at the left physical margin. To cancel all tab stops while leaving the margins intact, press the tab stop cancel key (TAB CLEAR) at any point in the line.
61 and repeat key (REPEAT) 62. Such actuation also positions the head at the then existing left margin position.

The current model row is also column layout selector 73
It can be replaced with the line set by . Such processing allows an operator to automate the setting of table stops without requiring special space calculations. This is done by pressing the illuminated key, thereby preconditioning the typewriter for a blind or blank printing operation without canceling the current model line. The contents of the longest line of each column are then printed by pressing the TABSET key 77 at the end of each line associated with each column. A new model row is set in RAM 105 by actuating the column layout key (COLIMN LAYOUT) 73 again, and this key is inactivated. Additionally, canceling the current row causes RAM 106 to cancel, along with its replacement by a new model row that replaces the current row.
This is done by

This new line form automatically positions the stops and margins so that there are two spaces between the longest line of each column and the start of the next column. The typewriter centers these new margins relative to the previous line's margins and any other possible pre-treatments that exist at this point are ignored.

A key operation performed in the column layout state caused by the operation of the column layout key 73 causes blind printing, that is, blank printing;
The display device 21 subtracts characters in accordance with the model row that existed before the column layout key operation and alerts the operator to the possibility of overflow into the right margin.

The display 21 essentially indicates the number of characters between the head position and the right margin. This information indicates the actual value when printing is done simultaneously with data entry and in the case of blind or blank printing, i.e. when the keyboard buffer is occupied. If this display exceeds 99 characters (this is the maximum number that can be displayed), the symbol '
--' occurs on the display 21, which lasts until the number to be displayed falls to 99. As shown in the applicant's earlier application mentioned above, the printing unit 2
When 5 is in the hot area for printing in the ADLIST state at 8 characters from the right margin apart from the acoustic signal, the display device 21 goes into a blinking state, and this display device 21 continues subtracting until it reaches the right margin. Extending the right or left margin by using the margin bypass key 91
In this display device 21, when the printing unit 25 is in an area that extends beyond the left margin, a symbol '-' is displayed in the left digit, and when it is in an area that extends beyond the right margin, the symbol '-' is displayed in the right digit. Show it. Indication of an error, other than an acoustic one, is generally made by flashing the letter 'E' on the display 21. This character′
E' is erased by one of the backspace key, new line key (NEW LINE), etc., which erases errors. A display from before the time when the error occurred will then appear on the display device 21.

In the ADJUST state described above, normal printing of characters and spacing of the printing unit 25 is performed when the character keys are activated, and only spacing is performed when the space bar is activated. Also,
In this ADJUST state, when the printing unit 25 approaches the right margin, when the space bar is activated, no spacing occurs and the printing unit 25 moves to the beginning of a new line.

In the typewriter of the present invention, as in the earlier application, a character that is erroneously printed in a line during printing in automatic mode is pressed by positioning the head at this character to be canceled and pressing the cancel key (CANCEL). It can be removed or replaced by activating the . This is repeated using the same drying return key (REPEAT) 62. Automatic cancellation is also possible for the line being printed as well as for the line before that line. To do this, press the EXPRESS key 76, then repeat key 62.
Just press . This causes a return to memory and actuation of motors 24 and 29 to position unit 25 at the first character of the previous row.
The last position of the unit 25 is maintained and the display 21 also displays the symbol 'PL' indicating the previous line, which remains that way during the time when the operating point of the typewriter is placed in the previous line. be done. By actuating the space bar key 65 and the backspace key 66, the unit 25 is positioned at the point to be modified, and then the operation as shown in the prior application as a modification of the line being printed is performed. .

This typewriter is equipped with a device that automatically positions unit 25 at the end of printing after a single character has been corrected. This operation is performed by actuating the relocation key (RELOC) 75.
This activates motor 24 and then motor 23 to move unit 25 from its current position to the previously held position. Actuation of the relocation key 75 after the blind printing condition positions the unit 25 at the final printed character and prints in the actuated area in a blind or blank mode.

According to another feature, the typewriter can provide manual canceling by using a correction ribbon device in areas of text that are not stored in the buffer. This is accomplished, as in the earlier application, by placing unit 25 at the character to be canceled and by manual operation of the print roller, bar and backspace, and by actuating the cancel key 64 and the character key to be canceled. be exposed. Pressing this letter key causes forward movement of the unit 25. This movement is also in proportional spacing, which is equal to that occurring during a normal print cycle. The printing unit 25 is thus automatically positioned at the character to be canceled. It is then possible to carry out corrective operations on a plurality of characters in succession without having to reposition the head to an adjacent character. If the character to be modified is formed by the superposition of two characters, e.g.
followed by the second letter.

A different actuation operation from the character following the cancel or from the character following the backspace 1 is normally performed, which will take the typewriter out of the cancel state.

According to other features, this typewriter has letters,
A device is provided for positioning the printing unit 25 in the space between two printed areas so that a word or phrase can be inserted automatically. To perform this function, here designated as INSERT, the printing unit 25 is moved to any position within the area of the space between the two printed areas. The centering key (CENTER) 70 and the repeating key (REPEAT) 62 are then actuated to preform the display of the letter 'C' on the display 21 of the typewriter and for blind or blank printing. . The character, word or phrase to be inserted is keyed in in this blank print mode and an indication of the area available for printing is displayed on the display 21.

Carriage return key with line space (RETURN) 60, carriage return key without line space (INDEX) 67 or tabulation key (TAB) 7
By pressing one of the 8's, these activated characters will be printed. This printing is then compressed or expanded, if necessary, in order to insert the insert into the available space. especially,
Space to the right and left is reduced to ensure a minimum of 1/2 space on each side (see Figure 6). That is, if insertion is not allowed,
These spaces are reduced until a minimum of 1/2 of that space is guaranteed between one word and the next. Alternatively, if this space is larger than what is available, the corresponding space is increased using the same criteria used for space reduction (see FIG. 5).

This 'INSERT' operation provides automation of the half-pitch function and centering of the title between two stops, and is also useful for automatically printing tables.

According to further features, this typewriter:
RAM 105 can store, for example, the number of base line spaces on platen 26 that can be typed onto a sheet starting from the top of the sheet. The typewriter then displays on the display 21 several line spaces in advance that the typewriter is first approaching the end of the page and then has reached the end of the page. To cause this display, the PAGE END key 74 is actuated, causing the typewriter to perform a subtraction with respect to the basic line spaces stored in memory for each new line with line spaces (RETURN). start, thereby making this subtraction independent of the row spacing value selected by selection device 81.

An accurate indication that the typewriter is nearing the edge and coincident in time with the selected line spacing is from the end of the page when actuating the line spaced carriage return key (RETURN) 60. This is done by displaying '-3' on the display device 21 at the third counted line space. This display is then displayed on the first letter-numeric key 57.
It is replaced by the normal display (number of characters available for printing) on the second operation. This display decrements each line space until it reaches zero. On the other hand, if the line spacing value changes due to a signal already issued, the typewriter continues to issue the corresponding display. If this is not possible, and when zero is reached, no numerical display is given anymore, the carry repeat command is blocked and a symbol representing the error is displayed on the display 21.

of the typewriter selected by the selection device 90.
The STORAGE state stores three model rows used near the non-volatile memory 105, parameters for the end-of-page signal sending device, model page parameters for the end-of-page signal sending device, model page parameters for reuse, and Allows words and/or phrases to be recorded. In order to record the row form, the state selection device 63 selects the STORAGE
After being moved to the position, the LINE FORM selection key (LINE FORM) 72 is actuated, and 1,
2 and 3 follow. This operation preconditions the memory to replace its contents with the contents of the current row. Line form selection key (LINE FORM)
72, the symbol 'LF' also appears on the display device 21.
occurs in Line form selection key (LINE FORM)
72 is activated again, the actual alignment operation begins and the symbol '
Erase LF'.

To store the number of line spaces in memory,
PAGE END key 74 is actuated to cause the symbol 'PE' to appear on display 21. When the desired line spacing is NEW LINE or INDEX
activated by the key and finally PAGE END
The keys are also actuated to effect the actual alignment of the line spaces and to remove the symbol 'PE' on the display 21. Alternatively, the number corresponding to the desired base line space is activated after activation of the PAGE END key.
When the PAGE END key is actuated again, the old information is replaced with the new one and the symbol 'PE'
disappears from the display device 21.

To store the parameters of the model page, the page layout selection key (P) 69 is actuated, and also the number of areas of memory 105 in which the page form is introduced. This memory consists of 10 memory areas P
1, P2..., which can be selected from numbers 0-9. Such operation results in a total available memory capacity, ie, memory locations, in the display device 21 for storing character codes or position codes. Printing unit 25 is moved to the desired stop position and page layout selection key 69 is pressed. This typewriter places the coordinates of points in basic space units and basic line space units. The recording operation of the set phrase in areas M1, M2, . . . by the set phrase selection key (M) 71 is similar.

For errors that occur during each recording operation, actuation of the cancel key will cause a reset of the pretreatment (and thus of the display) if immediately followed by actuation of the pretreatment key. However, if it follows actuation of a numeric key, this preconditioning is maintained but the information entered is canceled. Repeated actuation of the cancel key (CANCEL) 64 cancels this pre-processing even after inputting numerical information.

According to the cited Japanese Patent Application No. 54-91473, the memory 105 (FIG. 4) has a buffer 160 in which the current printed line is stored. FIG. 7 shows a flowchart for centered insertion of words. In particular, the activation of the centering key (CENTER) 70 and the repeating key (REPEAT) 62 (point 320)
If the position of the printing unit 25 represented by PASS is in a character-free insertion zone between the position LSP of the last character to be printed and the position TSP of the first character to be printed, the program te321
control. If negative, 322
signaled against. If affirmative, approximately 0.423 mm (1/60 inch) included in the insertion zone
The number of differences N in basic space units is determined.
The number 6 corresponding to the large space (to be divided into two 3x half spaces) is subtracted from N and the result is stored in the CONTA cell of ROM 105. The symbol 'I' appears on the display 21 and indicates the blind write and insert mode.
The BLND and insertion completed INS storage areas are set to 1. Thereafter, the general KBE keyboard entry routine 324 causes a character key to be pressed, and branch 326 controls whether the entered character's C1 space is less than CONTA. If not, an error appears at 328. If yes, the program moves to block 32.
Proceed to step 7. This block 327 is from the cited patent application
It is substantially equivalent to the routine given for centering titles between margins in No. 54-91473. Briefly, block 327 calculates and stores half of N-6 into MI, stores the input character buffer 160 (defined by MI) into CRIGA point, and calculates the number of spaces MI-C1/2. involves addition to the left-hand side of the entered character equal to , which includes the next shift of the entered character as well as the addition of C1.
Accumulation to CONTA and CRIGA of the remaining half of C1
Accompanied by the accumulation of

Each time a new character is added, the buffer character that has not been memorized and written is displaced to the left by half of the space C1 of this daisyized character, and CRIGA each time Increased by half. These character spaces are further accumulated in CNTA,
It is displayed on the display device 21 and compared with a reference length, an error signal being generated in case of an overflow. When branch 325 confirms that the actuation of the service key indicates printing, the carriage or print head 25 is moved to the calculation point where the first character of the title is to be printed. A routine is started which causes printing to proceed from the stored buffer of characters.

To send the end of page signal, RAM10
6 (Figure 2) is for the basic time space.
CINT and N LINE counters and DV
PAGE and ENPA storage. Additionally, non-volatile RAM 105 stores in NLS the upper two digits of the basic space line to be recorded.
According to FIG. 8, the memory of this page is D V
Keyboard entry point 330 includes a passage through branches 331 and 332 that verifies the STORAGE status of selector 63 by pressing down the page end key 74 in the PAGE storage device. In the negative case, if the key pressed and the selector set differ by the page end key 74 and the storage device 63, the program will
Follow KBE330. If yes, the microprogram sets D V PAGE to point 3 after checking in branch 334 that D V PAGE=0.
Set to 1 at 35 and point CINT to 335
, and return to KBE330.
Now, when a number key is pressed down, the program verifies it in branch 336, and because one two-digit number has been pressed down, another
Branch 338 controls that no digits other than one were present in CINT, leads this number to CINT and displays it on display 21, and KBE3
30, during which time an error signal is sent at 339 when these two digits have already been stored.

As already mentioned, memory in CINT is
This is done by repeatedly pressing the RETURN key, that is, the NEW LINE key 60. brunch 336
The microprogram controls at 341 that this key 60 has been pressed down, and executes a new line routine at 342 with rotation of the roller 26 from 2 to 6 elementary line spaces according to the position of the selector 81. Proceed to CINT
The number of selectors 82 is accumulated at (point 343), it is displayed on the display device 21, and the process returns to the KBE 330.

The number of lines is stored in the non-volatile storage device 105 at block 345 when the page end key 74 is pressed down for the second time with D V PAGE set to 1.
It completes when it causes the loading of CINT, the reset of D V PAGE to 0, and the return of KBE 330.

Here, when the selector 61 goes to the normal state, the press of the page end key 74 is the branch 332 and 3
33 to the memory 105 at block 346.
causes the transfer of the stored number from the NLS of 106 to the NL PAGE of 106, the setting of ENPA storage to 1 and the return to 330.

Each press of the RETURN or NEW LINE key 60 causes the selector 8 to pass through launches 350 and 351.
The number set above 2 is subtracted from the NL PAGE counter at block 358. The program passes through branch 353 and block 353 to select N L with the number set in selector 81.
Perform the division of PAGE and branch 355
And when it is 3 through block 356, the result is displayed on the display device 21. block 357
causes an error to occur when the end of the line is exceeded in branch 353.

Since the present invention is configured as described above, it produces the effects described below.

The typewriter of the invention offers the advantage that there is no need to precisely check the limits of the blank area, since it is only necessary to move the printing unit coarsely in the blank area.

Also, checking the printability of characters to be inserted can be performed without operator intervention and without misalignment or overprinting of newly entered characters with respect to previously printed characters.

Thus, text can be automatically centered in the blank areas contained between printed areas without any manual fixing of the limits of the blank areas.

[Brief explanation of drawings]

FIG. 1 is a plan view of an electronic typewriter having a printing member positioning device according to the invention, FIG. 2 is a block circuit diagram of the logic control unit of the typewriter of FIG. 1, and FIG. 3 is a diagram of the typewriter of the invention. Keyboard layout diagram, Figure 4 is an organizational chart of the non-volatile memory of the control unit, Figures 5 and 6 are diagrams showing an example of the operation of the typewriter in Figure 1, and Figure 7 is a flowchart for centering and inserting a word. , FIG. 8 is a flowchart of page storage. 10: Typewriter, 20: Keyboard, 2
1: Display device, 22: Control console, 24, 2
9: Motor, 25: Printing unit, 26: Platen, 27: Guide section, 30: Hammer, 33: Ribbon, 33: Carriage, 38: Solenoid, 34:
Erase ribbon, 50: control unit, 100: microprocessor, 105, 106: RAM.

Claims (1)

[Scope of Claims] 1. An electronic typewriter 10 including a platen 26 defining a print line having a plurality of print positions, comprising: a keyboard 20 including character keys 57 operable to input characters to be printed; , the printing line has a blank area that can be used for printing at the printing position, a printing unit 25 for printing characters input at the printing position, and moving the printing unit to the front of the blank area. a memory 106 having a memory location; and preset means operable to enter a preset state in which the character code of the entered character is stored in the memory location without printing the entered character. (routine 320); and print control means operable to read the stored character code from the memory and cause the printing unit to print the input character centered on the blank area. In the writer, the print line has two printed areas adjacent in use to the blank area, and the memory location is related to the printing position of the blank area and is related to the printing position of the blank area. a first location group for storing the space codes of the two printed areas; and another two locations related to the printing positions of the two printed areas and storing the character codes of the printed characters of the two printed areas. a current position storage section (C
PASS), each position signal being associated with one of said memory locations, each printed character being associated with a unit of space along a print line; and responsive to said preset state and said position signal. accessing one of the memory locations associated with the current location of the printing unit and verifying whether the accessed location corresponds to a location of the first group of locations; first means (branch 321) for indicating that a blank area is just before the printing position; and responsive to said preset condition and the verified position of said printing unit before said blank area; a second means 326 for further verifying whether an input character can be printed in the blank space by a minimum blank space (3 basic spaces) with respect to a printed area adjacent to the blank area; responsive to the verified printability of the input character, determining the character code of the newly input character for subsequent actuation of the print control means and centered printing of the newly input character; and third means 327 for storing information in one of the first locations. 2. The electronic typewriter of claim 1, wherein said third means is responsive to each newly entered and printable character to select a previous memory location in said group of memory locations. An electronic typewriter characterized by rearranging character codes. 3. In the electronic typewriter according to claim 1, the blank area includes a first count (LSP) defining the last position before the blank area;
A range is set by a second count (TSP) defining a first position after the blank area, and the first means is configured to combine the position signal with the first count and the second count. An electronic typewriter characterized in that it has means for comparing. 4. An electronic typewriter according to claim 3, wherein the second means is responsive to the first count and the second count and includes a space unit usable for printing in the blank area. number (N-6)
An electronic typewriter characterized by the following: 5. The electronic typewriter of claim 4, responsive to a preset state of the typewriter and a verified position of the printing unit, in units of space available for printing in the blank area. Electronic typewriter, characterized in that it is provided with display means 139, 21 for displaying the number of units of space still available for printing after storing each new character. 6. In the electronic typewriter according to claim 1, an error in sending out a message that the number of space units associated with a newly input character exceeds the number of space units still available for printing. An electronic typewriter characterized by having a signal sending means. 7. The electronic typewriter according to claim 1, wherein the blank area is defined by the space left on the paper after previously printed characters are canceled. 8. The electronic typewriter according to any one of claims 1 to 7, wherein the printing control means has a service key (RETURN key 60) of the keyboard. . 9. In the electronic typewriter according to any one of claims 1 to 8, each of the minimum blank spaces is half the predetermined number of characters in space units (6 basic spaces). An electronic typewriter characterized by its space.