JPS59174378A - Confirmation system for print quality - Google Patents

Abstract

PURPOSE:To make easier the confirmation of print quality as well as permit the discrimination of drift by a method in which the same printing data are lap- printed with different colors for confirmation of print quality. CONSTITUTION:Forwarding printing is made by a red-color ink ribbon, etc., and in the backward path of a printer, lap-printing of the corresponding same data is made by a black-color ink ribbon, etc. For deficient or excessive printing of one or both of red and black colors, the quality of print is judged and confirmed easily. Also, the color drift of both color printing can be concurrently judged.

Description

Detailed Description of the Invention (1) Technical Field of the Invention The present invention prints the same print data multiple times and compares the print quality in order to confirm the stable normality of the mechanism and operation of the print unit of a print printer. This relates to a printing quality confirmation method.

(2) Prior Art and Problems Conventionally, as part of the manufacturing test for printing printers, such as serial dot printers, identical printers have been A method has been adopted in which the print data is printed a plurality of times, for example twice, and the print quality is compared. FIG. 1 shows an example of a test system, in which a dot printer under test 10 controlled by a terminal controller (TC) 1 is shown. That is, test data is sent from the tester 2 in the T//c1 to the device controller 11 in the serial dot printer 10 under test via the device controller 3. In response to an operator's instruction from the keyboard 12, the paper feed mechanism 14 inserts, for example, journal paper into the dot printer 16, and one of the test data from the device controller 11 is inserted.
Print a line. When one line is completed, a line break is made and one line of the same test data is printed backwards. Figure 2 shows 1 in this case.
This is an example. After printing 1 to 0 on the first line, print a line feed and print 1 to 0 on the second line. Next, after printing A to O on the first line, change the line and print A to O on the second line. Print.

In this way, the same data printed on two lines is compared vertically, and defects caused by typos, omissions, missing dots, extra dots, damage to the type wheel, etc. are extracted, and the print quality is checked.

That is, there are cases where the same defect appears in both cases, and cases where it appears only in one, and the normality and stability can be determined based on this.

However, comparing the upper and lower printed characters means overlapping the two in one's head, which puts a heavy burden on the operator.

Furthermore, the deviation between the first and second lines cannot be accurately determined using this comparison method.

(3) Purpose of the Invention The purpose of the present invention is to confirm the stable normality of the mechanism and operation of the printing section of a printing printer. It is an object of the present invention to provide a printing quality confirmation method that also facilitates the determination of deviations.

(4) Structure of the Invention In order to achieve the above object, the printing quality confirmation method of the present invention is a printing quality confirmation method in which the same printing data is printed multiple times and the printing quality is compared. The present invention is characterized in that a means for overprinting is provided, and the quality is confirmed by the color of the overprinted characters.

(5) Embodiment of the Invention FIG. 1 shows a test system of the present invention, and portions different from the conventional example described above are shown with diagonal lines. In the test method of the present invention, firstly, test data for one line is given twice from the tester 2, but the procedure program 4 is different. The second is to operate in conjunction with this procedure.
This is because a color ribbon feed mechanism 15 is provided. In other words, the procedure is to print one line in the forward direction on the ribbon of the first color, then switch to the ribbon of the second color without starting a line, and print the same print data in the reverse direction. It is.

FIG. 3 is an explanatory diagram of a specific example of the test method of the present invention, and shows an example of printing on the same journal as in FIG. 2.

In the figure, 1 to 0 are first printed with a red ribbon, and then the same 1 to 0 are printed in reverse using a black ribbon. The same goes for A~O. Further, if necessary, the printing example is changed and printing is performed for a plurality of lines.

The operator checks these results and detects missing parts in both red and black, excess printing, and only red parts.

By examining the deviation between red and black only in the black area, it is possible to analyze the adjustment defects and stability of the printing mechanism.

(6) As described in detail, the present invention provides stable normality of the mechanism and operation of the printing section of a printing printer.

In order to confirm this, the same print data is overprinted in different colors in the forward and reverse directions. As a result, it is possible to determine at a glance whether or not there is an overlap between the two printings, and therefore it is extremely easy to determine whether there is a defect in the mechanism or a maladjustment. In particular, two print shifts in forward and reverse directions are clearly recognized. Furthermore, as is clear from the comparison between FIG. 2 and FIG. 6, there is also the advantage of saving printing paper.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a conventional example and an embodiment of the present invention, FIG. 2 is an explanatory diagram of a printing example showing the operation of the conventional example, and FIG. 6 is an explanatory diagram of a printing example showing the operation of the present invention. In the figure, 1 is a terminal controller, 2 is a tester, 3.11 is a device controller, 4 is a procedure program, 10 is a dot printer device, 12 is a keyboard, 16 is a dot printer, 14 is a paper feed mechanism, and 15 is a two-color printer. The ribbon feed mechanism is shown. Patent applicant Fujitsu Ltd. sub-agent Patent attorney 1) Yoshishige Saka

Claims (1)

[Claims] In a printer's print quality confirmation method that prints the same print data multiple times and compares the print quality, a method is provided to overprint the same print data in different colors, and the quality of the overprinted characters can be improved. A printing quality confirmation method characterized by checking.