JPS6217552B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Problem The present invention relates to a typewriter that is capable of automatically erasing composite characters made up of at least two types of characters printed at different printing positions.

Prior Art In conventional typewriters, when printing a composite character that combines two types of characters at different printing positions, such as "HP", first print "H" at the desired printing position, and then , the printing mechanism is operated in half-spacing along the printing line, and then "P" is printed.

The typewriter has a memory that stores each printed character printed at a printing position according to a normal spacing operation, and when erasing a printed character, the character stored at each storage position of the memory is used. Based on the code, the printing mechanism is driven to print via the erasing medium to erase the printed characters.

However, in the case of composite characters such as the above-mentioned "HP", it is impossible to store "P" printed in the half-print position in the memory, and the composite character cannot be erased. To erase characters printed at this half-printing position, the printing mechanism must be moved to the half-printing position by operating a half-forward key or a half-back key, and then the printing mechanism must be driven via an erasing medium. In some cases, composite printing could not be automatically erased with a single key operation.

Purpose In view of the above-mentioned conventional drawbacks, the purpose of the present invention is to
To provide a typewriter capable of improving workability by erasing a composite character consisting of a combination of at least two types of characters printed at different printing positions by one operation of an erasing key.

Example Hereinafter, the present invention will be explained according to one embodiment.

FIG. 1 is a block diagram showing a typewriter equipped with a lift-off correction type erasing mechanism according to the present invention. A dead key 2b such as (umlaut), a function key 2c, and an erase key 2d for executing an automatic erase operation to be described later are arranged. By operating the character key 2a, dead key 2b, and function key 2c, a code signal CDS corresponding to the key is output, and by operating the erase key 2d, an erase command signal ES is output to the print control circuit 3 as a control means.

The print control circuit 3 controls the character key 2a or dead key 2b operated in response to the code signal CDS.
The printing signal PS corresponding to the memory 5 is outputted to the printing mechanism 4 to execute each printing operation, and the memory 5
Outputs the character code CC corresponding to the printed character,
This character code is stored in the memory location corresponding to each print position.
CC will be remembered.

The memory 5 has a number of memory locations corresponding to the number of print positions per print, and each memory location includes a first memory area corresponding to a normal print position as a first print position and a half memory area as a second print position. and a second storage area corresponding to the printing position. Each of the first and second storage areas has first and second storage portions for storing character codes CC of two types of printed characters printed at the normal print position and the half print position, respectively.

In addition, the print control circuit 3 outputs an erasing drive signal EDS to the erasing mechanism 6 in response to an erasing command signal ES input by operating the erasing key 2d, and outputs an erasing drive signal EDS to the erasing mechanism 6, and an erasing medium 6a such as an adhesive tape provided in the erasing mechanism 6. is positioned between the printing paper and the printing mechanism 4. Then, the print control circuit 3 reads the character code CC corresponding to the printed character from the first and second storage areas in the first and second storage areas corresponding to the normal print position and the half print position, and applies the character code CC to the character code CC. By outputting the corresponding print signal PS to the printing mechanism 4, the same character as the printed character is printed via the erasing medium 6a, thereby erasing the printed character.

Furthermore, when the printing operation of the printing mechanism 4 is completed in accordance with the operation of the character key 2a, the printing head (not shown) of the printing mechanism 4 is spaced to the next printing position in the printing line direction, and Along with this spacing operation, address signals indicating storage positions corresponding to printing positions in the memory 5 are sequentially switched.

Next, a description will be given of the automatic erasing operation of composite characters printed sequentially at printing positions K to K+3 as shown in FIGS. 2 to 4.

First, to explain the printing operation, when the character key 2a, dead key 2b, back space key BS, half back space key HBS, and half forward space key HFS are operated in the order shown in FIG. are each print signal
PS is output to the printing mechanism 4, and each printing position K is
The characters \, O, HP, and A are sequentially printed in ~K+3, and the first and second storage areas of the first and second storage areas in each storage location MK to MK+3 of the memory 5 are printed in sequence as shown in FIG. Part n1, n2, h1, h2
stores the character code CC corresponding to the printed character.

Next, to explain the case of automatically erasing the composite character "A¨" printed as above, after positioning the print head at the half print position (K+3)h by operating the backspace key BS, etc., press the erase key. 2d is operated once, the print control circuit 3 outputs the erase drive signal EDS to the erase mechanism 6 in response to the erase command signal ES, and positions the erase medium 6a in front of the half print position (K+3)h. First and second storage portions h1, h of the second storage area (MK+3)h corresponding to the half print position (K+3)h
The character codes CC corresponding to the printed characters "¨" and "A" are sequentially read from 2. Then, the print control circuit 3 outputs a print signal PS corresponding to the character code to the print mechanism 4, and sequentially prints the characters corresponding to the print characters "¨" and "A" via the erasing medium 6a. As a result, the erasing medium 6a peels off the carbon of the printed characters from the printing paper, and automatically erases the composite character "A¨" printed at the half printing position (K+3)h.

In addition, the normal printing position (K+2)n and the half printing position (K+2) of the printing position K+2 will continue to be printed.
When automatically erasing the composite characters "HP" printed on each of the letters h, when the erasure key 2d is pressed once, the printing control circuit 3 first moves to the half printing position (K+
2) After reading the character code CC corresponding to the print character "P" from the first storage area h1 of the second storage area (MK+2) h corresponding to h and backspacing the print head, the print character Based on the character code corresponding to "P", the print head is driven to print via the erasing medium 6a to erase the printed character "P". Next, the normal printing position (K
+2) first storage area (MK+2) corresponding to n
After reading out the character code CC corresponding to the print character "H" from the first storage part n1 of the printer and operating the print head at halfback spacing, the print head is driven to print via the erasing medium 6a based on the character code. to erase the printed character “H”.
As a result, the composite characters "HP" printed at the normal print position (K+2)n and the half print position (K+2)h are automatically erased.

Also, when erasing the composite characters "¥" and "O¨", if the erase key 2d is operated once after positioning the print head at print position K and K+1, respectively,
Similarly to the above, the character code CC corresponding to the composite character is sequentially read from the first and second storage parts n1 and n2 in the memory storage areas (MK)n and (MK+1)n corresponding to the normal printing position, and A printing signal PS corresponding to the code is output to the printing mechanism 4, respectively. As a result, the printing mechanism 5 sequentially erases the printed characters corresponding to each printed character via the erasing medium 6a, and the carbon of the printed characters attached to the printing paper is peeled off by the erasing medium 6a, and the composite characters "\", “O¨” are automatically deleted respectively.

In this way, in this embodiment, the character codes of two types of characters printed at the normal print position and the half print position, which constitute one print position, are stored in the first storage area and the half print position corresponding to the normal print position. The character codes are stored in the corresponding second storage areas, and when the erase key 2d is pressed, the print head is driven to print via the erase medium 6a based on the character codes stored in the first and second storage areas. By doing this, the composite characters can be automatically deleted at once.

In the above embodiment, an example in which two storage parts are provided in each storage area has been described, but it goes without saying that the effect will be greater if each storage area of the memory is configured to have three or more storage parts.

Effects As explained above, the present invention provides a first storage area for storing the character code of the first printed character printed at the first printing position in each storage position corresponding to each printing position of a printing line, and a second storage area for storing the character code of the first printed character printed at the first printing position. 2nd printed in the 2nd printing position
A memory having a second storage area for storing character codes of printed characters; and when an erase command signal is input in response to an operation of an erase key arranged on a keyboard, the character codes are stored in the first storage area of the memory. After driving the printing mechanism via the erasing medium based on the character code of the first printed character, the printing mechanism is then driven to the second printing mechanism.
At least two types of characters printed at different printing positions are moved to the printing position and driving the printing mechanism via the erasing medium based on the character code of the second printing character stored in the second storage area of the memory. It is possible to erase a composite character consisting of a combination of characters by a single operation of the erase key, and it is possible to provide a typewriter that can improve workability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a typewriter according to the present invention, FIG. 2 is an explanatory diagram showing the order of key operations, and FIG.
The figure is a code explanatory diagram showing the printed characters corresponding to the printing position, and Fig. 4 is an explanatory diagram showing the storage state of the storage positions arranged in the memory, where 1 is the keyboard, 2d is the erase key, and 3 is the print control. 4 is a printing mechanism, 5 is a memory, 6 is an erasing mechanism, 6a is an erasing medium, and CC is a character code.

Claims (1)

[Claims] 1. Composite characters are created by driving a printing mechanism by operating various keys arranged on a keyboard to print at least two types of characters in adjacent printing positions consisting of first and second printing positions. In a typewriter that prints, a character code is stored corresponding to each print position in a print line, and a character code of a first print character printed at the first print position is stored in a first storage area, and a second print position is used to store the character code of the first print character printed at the first print position. a memory having a second storage area for storing a character code of a second printed character; and when an erase command signal is input in response to an operation of an erase key arranged on the keyboard, the first memory of the memory After driving the printing mechanism via the erasing medium based on the character code of the first printed character stored in the area, the printing mechanism is then moved to a second printing position, and the character code is stored in the second storage area of the memory. A typewriter comprising: control means for erasing the composite character by driving a printing mechanism via an erasing medium based on the character code of the second printed character.