JPS6211676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a margin setting device for setting left and right margin positions for specifying the printable range of a print head in a typewriter or the like.

In general, margin setting devices such as typewriters are mechanical, in which the left and right margins are set by manually moving them to the desired margin positions, and in others, the left and right margins are set on the keyboard. There are two types: one in which the margin is set directly by numerical values by operating keys and numeric keys, and the other electronic type in which the print head is moved to a desired margin position and the margin is set by operating a margin setting key. The electronic type has the advantage that the margin setting position is stored in a memory and printing is controlled based on the contents of the memory, thereby simplifying the mechanism and making the control easier. However, when setting the left and right margins, they may be set incorrectly, resulting in incorrect printing.

SUMMARY OF THE INVENTION An object of the present invention is to provide a margin setting device that automatically corrects the margin positions when the left and right margin positions are set incorrectly and prevents erroneous printing by generating an error signal. .

The present invention will be explained in detail with reference to FIGS. 1 to 3. FIG. 1 is a schematic diagram of a keyboard according to the present invention, and the keyboard 1 includes a large number of characters, a symbol key 2, a function key 3, a space key SP, a left margin setting key LK, and a right margin setting key.
RK is installed and print control circuit responds to key operation.
The code symbol CS is output to the PC, and the print control circuit PC
executes printing control based on the code symbol CS. First, to explain how to set the left margin position, operate function key 3 or space key SP on keyboard 1 to move the print head (not shown) to the desired left margin setting position, then press left margin setting key LK. When operated, as shown in Figure 2, a numerical signal PS indicating the current digit position of the print head is sent from the print control circuit PC and a left margin setting signal LS is sent from the keyboard 1 to the margin setting circuit.
The margin setting circuit MC stores the numerical signal PS in the left margin position memory LMEM. Similarly, when setting the right margin, move the print head to the desired right margin setting position and operate the right margin setting key RK to send the numerical signal PS and right margin setting signal RS to the margin setting circuit MC.
is input, and the numerical signal PS is stored in the right margin position memory RMEM. At this time, the comparison calculation circuit CC performs a comparison calculation on the contents of both memories LMEM and RMEM, and outputs an error signal ES to the margin setting circuit MC when the difference is less than or equal to a predetermined value DN. When the error signal ES is input, the margin setting circuit MC converts the contents of the memory LMEM or RMEM to a predetermined value, e.g.
If it is possible to print 80 digits, the memory
Change LMEM to 1 and RMEM to 80. Numerical DN
The case where the value is set to 10 will be explained in more detail with reference to FIG. a shows an example where the left and right margins are set correctly, and the left margin position LP is
At the 10th column, the right margin position RP is set at the 50th column, and AP is located at the 8th column to the left from the right margin position RP, indicating to the typist that the current print position is close to the right margin position RP. This is the alarm position for generating a notification alarm. In this case, 10 and 50 are stored in the memories LMEM and RMEM, respectively. Next, as shown in b, the left margin position LP
When set to the 45th digit, 45 is stored in the memory LMEM, and the comparison calculation circuit CC stores the memory RMEM,
Compare and calculate with LMEM. Now, the difference is 5, which is smaller than the numerical value DN10, so the comparison calculation circuit CC outputs the error signal ES to the margin setting circuit MC, and the margin setting circuit MC changes the contents of the memory RMEM to 80 and outputs the alarm signal AS. , informs the typist of the incorrect setting. C shows the left and right margin setting positions after the change. In addition, when the left margin position LP is set to the 55th digit as shown in d from the state of a, 55 is stored in the memory LMEM, and the calculation result in the comparison calculation circuit CC is -5, which is the same numerical value as in the example shown in b. Since it is smaller than DN10, the memory
The contents of RMEM are changed to 80, an alarm signal AS is output, and the left and right margin setting positions are in the state e. Also, when the right margin position RP is set to the 15th digit from the state of a as shown in f, 15 is stored in the memory RMEM, and the calculation result in the comparison calculation circuit CC is 5, which is smaller than the numerical value DN10. The content is changed to 1,
The left and right margin positions are as shown in g, and an alarm signal AS is output. Here the number DN is 10
However, the right margin position RP and alarm position AP
The number of digits between the right margin position RP and the alarm position AP may be changed, and at the same time, the numerical value DN may also be made variable accordingly.

In addition, if the left edge position and right edge position of the paper are set in advance, the contents of the memory after the change are
If the number of digits corresponds to the rightmost position, an even greater effect can be obtained.

As described above, in the present invention, when the difference between the left and right margin positions is less than a predetermined value, priority is given to the margin position set later, the margin position set earlier is changed to a predetermined position, and the typist is simultaneously By emitting an alarm signal, we have realized a margin setting device that prevents printing errors, and even if a typist types incorrectly, a print result close to the desired print can be obtained, and this has an industrial effect. is a great thing.

[Brief explanation of the drawing]

Fig. 1 is a keyboard used in the margin setting device according to the present invention, Fig. 2 is a block diagram of the margin setting device according to the present invention, and Fig. 3 is an explanatory diagram showing its operation. , RMEM is a memory, MC is a margin setting circuit, CC is a comparison calculation circuit, and AS is an alarm signal.

Claims (1)

[Scope of Claims] 1. A margin having a margin setting means for storing in a memory numerical values corresponding to left and right margin positions specifying the printable range of an input print head, and controlling printing based on the numerical values. In the setting device, calculate the difference between both numerical values stored in the memory,
Comparative calculation means outputs an error signal when the calculation result is less than a predetermined value; and when the error signal is output, the content of the memory corresponding to the margin set first among the left and right margin positions is determined in advance. 1. A margin setting device comprising: margin correction means for changing the margin position to a numerical value that has been set, and for generating an alarm signal indicating to an operator that the setting of the margin position is inappropriate.