JPS63262245A - Printer - Google Patents

Abstract

PURPOSE:To enable an already printed character to be dressed later by providing a dressing key for instructing overstriking, and performing character dressing based upon the operation of said key, while providing a correction means for correcting the dressing data of a memory means. CONSTITUTION:When an operator moves a printing head M2 to a position where a character is already printed, and presses a dressing key M5, a correction means M6 performs a dressing on said character. The correction means M6 performs a correction on a dressing data of a character being contained in a character data relevant to a character in a memory means 1. By depressing the dressing key M5, a dressing data detection means M7 judges the presence of the character dressing data contained in the character data of the memory means 1 instructed by a pointer memory 4. When the judgement is 'YES', an overstriking means M8 does not perform overstriking for the dressing of said character, while when the judgement is 'NO', the means M8 performs overstriking only on the portion for dressing said character. By this operation, a character dressing can be performed even on a character already printed, thereby, a deviated overstriking can be avoided, and a well aligned character printing as compared with other printed characters can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a printing device such as a typewriter, and more specifically, the present invention relates to a printing device such as a typewriter. The present invention relates to a printing device equipped with a mechanism for character decoration.

[Prior Art] Some conventional English typewriters are known to have a correction function for later erasing characters once printed on paper or the like. For example, this can be done by applying a collection tape coated with an adhesive and hitting the same type several times with slight shifts on top of the characters that have been printed by attaching carbon powder, then removing the carbon powder and printing the characters. This is to erase the . In such a correction function, it is necessary to reprint the same type at the same location, but for this purpose, a line buffer is usually provided to store one line of printed characters, and the print head is moved to the location of the character to be erased. Some typewriters have an automatic correction feature that selects and erases the same type based on the data stored in the line buffer when the correction key is pressed.

On the other hand, some typewriters are equipped with a mechanism for printing characters of the same type or different types in an overlapping manner at the same position in order to enrich the printing expression. For example, in order to emphasize a certain character, there are some types of printers that print the same type twice or more with slight shifts (bold printing). In addition, there are some types of underlined characters that are printed by overprinting printed characters and underlined characters at the same position.

In this way, the complicated operation of printing two or more times at the same location is usually automatically performed by the printing device simply by pressing a dedicated key provided on the typewriter. Further, when erasing such characters, the erasing operation is performed many times in the same manner as character erasing is performed for each printing cycle.

[Problems to be Solved by the Invention] In the conventional printing device described above, when printing a new character, first press a key that instructs printing with modification, then press a character key, and the character is automatically overlapped. By typing, it is possible to print a modified character by adding a modification to that character. However, if such a key is used to print a modified character on a normally printed character, the following problems occur. That is, since the character has already been printed in the first position and the modified character including the main body of the character is overprinted, the main body of the character will be printed in the second position. Therefore, if the position of the print head shifts even slightly,
The width of the main body of the character becomes wider, and the balance with other characters is lost. Also, carbon powder from the printing ribbon adheres to the area where these two strokes were performed, and even if you press the correction key to erase these characters, the collection ribbon cannot remove the carbon powder sufficiently, resulting in clean characters. There is also the problem that deletion cannot be performed.

[Means for Solving the Problems] The present invention, which has been made to solve the above problems, as shown in FIG. a storage means M1 for storing printed character data including information indicating for each character, and a pointer memory M4 for storing the position in the storage means M1 of character data corresponding to the printed character M3 at the position of the printing spatula I''M2. In the printing device, a modifier key M5 instructs overprinting, and a print character M at the position of the print head M2 based on the operation of the modifier key M5.
The present invention is characterized in that it is provided with a modification means M6 for modifying the character modification information in the storage means M1.

As an embodiment of the present invention, the above-mentioned modification means M6 adjusts the pointer memory M in response to the operation of the modifier key M5.
a modification information detecting means M7 for determining the presence or absence of character modification information in the character data of the storage means M1 located at a position stored in the storage means M1, and when it is determined that character modification information exists;
One example includes an overstriking means M8 that does not overstrike the print M3 at the position corresponding to the pointer memory M4, but overstrikes only the modification part on the print M3 when it is determined that there is no character modification information. It will be done.

[Operation] When the operator moves the print head M2 to the location of a character that has already been printed and presses the modification key M5, the modification means M6 modifies the character. The character modification performed here refers to the printing of only the 1x decorative part excluding the main part of the character.Furthermore, the modification means M6 modifies the character modification information included in the character data corresponding to the character in the storage means Ml. In the embodiment described above, when the modification key M5 is pressed, the modification information detection means M7 determines the presence or absence of character modification information included in the character data in the storage means M1 indicated by the pointer memory M4. When determining that there is character modification information, the overstriking means M8 does not perform overstriking to modify the character.When determining that there is no character information, the overstriking means M8 overstrikes only the modifying part of the character. conduct.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, a printing device according to the present invention is incorporated into an electronic typewriter equipped with an automatic collection function.

FIG. 2 is an external perspective view of the typewriter 1 of this embodiment. The typewriter 1 includes a keyboard 3 provided in front of a frame 2, a printing section 4 provided behind it, and an electronic control section (not shown).

Keyboard 3 has character keys 5, space key 6, return key 7, backspace key 8, word back key 9
, a correction key 10, a bold key 11, an underline key 12, a code key 13, and various other function keys and switches such as a pitch selector switch 16.

A liquid crystal display 17 is provided behind a portion of the keyboard 3 where keys and switches are arranged, and displays printed characters, messages to the operator, and the like. Among these keys, the word back key 9 is a key for returning the printing position to the left for each word. Further, the bold key 11 is a key for making printed characters bold, and the underline key 12 is a key for making printed characters underlined, both of which are used for newly printed characters. When the code key 13 is pressed at the same time as another key, other functions are assigned to that key, but when pressed at the same time as the bold key 11, it functions as a bold replace (BR) key, which will be described later, and is used as an underline key. When pressed at the same time as 12, it works as an underline replace (ULR) key.

In the printing unit 4, a platen 20 is rotatably installed on the frame 2, and a carriage 22 supported by a guide shaft 21 is arranged to be reciprocatable along the longitudinal direction of the platen 20. The platen 20 is rotationally driven by a line feed stepping motor (not shown), and the carriage 22
is driven by a carriage stepping motor (not shown).

Mounted on the carriage 22 is a print head 27 comprising a cassette-type type wheel 24 in which a large number of type characters 23 are arranged in an annular manner, a print hammer 25, a print ribbon 26, and the like. For selecting the type 23, a type wheel stepping motor (not shown) is also provided on the carriage 22.

Printing hammer 25 strikes type 23 via printing ribbon 26 onto printing paper (not shown) wrapped around platen 20 . As a result, the carbon powder applied to the printing ribbon 26 adheres to the paper, and characters are printed. Further, a collection mechanism is provided on the carriage 22 to erase printed characters, and by hitting the same type of characters via a collection tape 29 on the printed characters, the characters on the printing paper can be erased. Remove carbon powder.

The electronic control unit 100 includes a CPU 110 as shown in FIG.
, ROM 120, and RAM 130, and is connected to a keyboard output circuit 140 for outputting data to and from the keyboard 3, a line feed stepping motor 152, and a carriage stepping motor 154. Print position control circuit 150, type wheel stepping motor 162
, a print control circuit 160 connected to the print hammer 25 and ribbon mechanism 164, an erase control circuit 170 connected to the collection mechanism 172, and a pass line 180 connecting these elements and circuits. CPUll0 is R
According to various programs for controlling the typewriter 1 stored in advance in the OM 120, print data is received from the keyboard 3, and the print head 27 and carriage 22
, platen 20, etc., are controlled via control circuits 150, 160, 170, etc. to perform various operations such as printing.

In addition to the above control program, the ROM 120 stores constants for initializing the typewriter 1, tables referenced during control, and the like. The RAM 130 includes a line buffer 132 area for storing one line of character data, a pointer memory 134 area indicating the position of character data corresponding to the print position in the line bar sofa 132, and whether bold printing is to be performed. Bold flag 1 used for determining whether or not
36 areas, and an area for temporarily storing data when controlling the typewriter 1.

Next, the operation of the wooden typewriter 1 related to the present invention will be explained using the flowchart shown in FIG. CPUl
10 executes the routine shown in the flowchart of FIG. 4 every time a key is pressed on the keyboard 3.

When some key is pressed and execution of the routine shown in FIG.
It is determined whether or not.

If the pressed key is the bold key 11, it is determined in S2 whether the bold flag (FB) 136 is 0 or not. When FB=0, set FB to 1 in S3, and
When ≠0, that is, FB=1, FB is reset to 0 in S4. These processes have the effect of alternately switching the FB between O and 1 each time the bold key 11 is pressed.

Also, if it is determined that the key pressed in Sl is not the bold key 11, then bold replace (B R) is performed in S5.
It is determined whether the key is a key or not. As mentioned above, the BR key is in a state where the code key 13 and the bold key 11 are pressed at the same time. If it is determined that the pressed key is not the BR key, it is further determined in S6 whether the pressed key is the character key 5 or not. If the determination is NO here as well, key processing corresponding to that key is performed in S7.

If it is determined in S6 that the pressed key is character key 5, it is determined in S8 whether or not the bold flag FB is 0, and F
When B=O, overcrowding printing processing is performed with S. This process also includes moving the carriage 22 by one character after printing. Then, in 510, the character data of the printed characters is stored in the line buffer (LB) 132, and this routine ends.

To explain the character data here, the character data is 2
The first byte is an ASCII code indicating the character type, and the next byte contains attribute information regarding the character decoration of the character, the amount of carriage movement, etc. For example, in the case of a bold character, the first bit is 1, and in the case of an underline, the second bit is 1. The character data stored in the LB in S10 does not include their modification information, that is, the first and second bits are O's.

If FB≠0 in S8, the pressed character key 5 is printed in bold at Sll. Specifically, the carriage 22
The printed characters 23 of the character are printed three times while shifting the character slightly laterally. After printing, the carriage 22 is moved to a position shifted by one character distribution from the first printing position. and 912
The character data of the printed character is stored in LB, but the first bit of the second byte of this character data is 1.

When it is determined that the key pressed in S5 is the BR key,
In S13, the character data at the position indicated by the pointer memory (PM) 134 is read from the LB, and in S14 it is determined whether or not the character data includes bold print information.

That is, it is determined whether the first bit of the second byte of character data is 1 or not. If it is determined that the character is not printed in bold, additional bold printing is performed on the character in step 515. That is, most of the characters that have already been printed are removed, and only two prints slightly shifted from the characters that have already been printed are performed. As a result, the main body of the character is not struck twice, so that even when the character is later erased using the collection function, the character can be erased reliably. Carriage 22 here too
is moved to a position shifted by one character distribution from the printing position of the character body, and in S16, the first bit of the second byte of the read character data is set to 1 and stored in the LB again, and this routine ends. . As a result, the character data in the LB of the character to which additional bold printing has been performed has bold printing information. Therefore, when performing the collection function later, erasing processing for bold printing can be performed, and the characters can be surely erased.

Further, if it is determined in S14 that the character data at that position has bold print information, this routine ends without performing any further processing. This is because there is no need to perform bold printing over characters that have already been printed in bold.

The above is an example in which the present invention is applied to the function of bold printing characters that have already been printed. Next, an example will be shown in which the present invention is applied to the function of underlining characters that have already been printed. This embodiment will be explained with reference to the flowchart of FIG. 5, but this routine can be realized simply by incorporating it into the "other function processing" section 87 of FIG. 4.

When entering this routine, it is first determined in step 821 whether the pressed key is the word pack (WB) key 9 or not. W.B.
If the flat key has been pressed, it is determined in S22 whether the underline replacement flag FULR is 0 or not.

When FULR=O, F_tJLR is set to 1 in S23, and data in the pointer memory (PM) 134 is stored in the carriage address memory (CAM), which is a storage area provided in the RAM 130, in S24. Then S
25 to move the carriage 22 and turn the rad 27 to 1 for printing.
Move the word back to the left. Here, one word refers to a group of characters separated by spaces, dots, etc. F U in S22
If it is determined that LR≠0, the process of 925 is immediately performed.

Also, if it is determined in S21 that the pressed key is not a WB plain key, then in 926 underline replace (U
LR) key. The ULR key is a state in which the code key 13 and the underline key 12 are pressed at the same time, but in this case, the FULR key is pressed in S27.
=1. 92B when FULR=1
Then, only an underline is printed on the characters from the current position of the print head 27 to the position stored in the CAM. Thereby, it is possible to underline characters that have already been printed from the location where the DLR key is pressed to the location where the WB flat key is pressed without printing the characters themselves. Therefore, even if the print head 27 is slightly misaligned at each character position, the characters will not be printed in bold. Thereafter, in S29, the F ULR is reset to 0, and in S30, the character modification information of the character data in the LB corresponding to the underlined characters is corrected to information indicating underlining. Specifically, the second bit of the second byte of each character data is incremented to 1 by 11. As a result, when these characters are later deleted using the collection function, the underlines can be deleted as well.

If F ULR≠1 in S27, the WB flat key has not been pressed and the location to be underlined in S24 has not been memorized, so this routine ends without performing the equivalent process6826 If it is determined that the key pressed is a key other than the ULR key, the function corresponding to the key is executed at 83'1.

Although the above embodiment has been described as processing in a line buffer, the process may be performed not only in a line buffer but also in a storage means such as a text memory. Further, the present invention is not limited to these embodiments, but includes various embodiments without departing from the spirit thereof.

Effects of the Invention As detailed above, in the printing device according to the present invention, even characters that have already been printed can be modified later by the modification means. The subsequent characters (■decoration) print only the decoration part excluding the main character, so the main character will not be printed out of alignment and will be printed in line with the other characters.

In addition, when character decoration printing is performed later in this way, the correction means records information that the character decoration has been performed on the character data in the storage means, so if the character is later tried to be erased by the collection function. However, it is possible to erase text including character decoration. Furthermore, since the main characters are not printed overlapping each other, the characters can be erased neatly.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an overview of the present invention, Fig. 2 is an external perspective view of an electronic typewriter that is an embodiment of the invention, and Fig. 3 is a block diagram showing the configuration of an electronic control section of the typewriter of the embodiment. Figure 4 shows the bold key 1 of the typewriter of the embodiment.
．． FIG. 5 is a flowchart of a routine executed when a key such as a bold replace key is pressed. FIG. 5 is a flowchart of a routine executed when a key such as a word back key or an underline replace key is operated. 1...Typewriter, 3...Keyboard, 5...Character key, 9...Word back key, 11...Bold key,

Claims (1)

[Scope of Claims] 1. A storage means for storing printed character data including information for each character indicating the presence or absence of character modification by overprinting, and a storage means for storing character data corresponding to the printed characters at the position of the print head. a pointer memory for storing the position of the printing device, a modifier key for instructing overprinting, and a character modifier for modifying the printed character at the position of the print head based on the operation of the modifier key; A printing device characterized by comprising: a correction means for correcting information; and a printing device. 2. The modification means, in response to the operation of the modification key, determines the presence or absence of character modification information in the character data stored in the storage means stored in the pointer memory; Overprinting means that does not overprint the printing at the position corresponding to the pointer memory when it is determined that there is modification information, and overprints only the modification portion on the printing when it is determined that there is no character modification information. A printing device according to claim 1, comprising: