JPH0389151A - Checking method of printing apparatus - Google Patents

Abstract

PURPOSE:To check a deviation in printing accurately by printing a rectangle or a pattern of symmetric characters onto the front and rear surfaces of a recording paper and seeing through the recording paper. CONSTITUTION:A front surface printing data outputting part 1f outputs to an input/output control program 5a printing data of a pattern of a rectangle and symmetric characters wherein the distances (a) and (c) from the right and left ends of a recording paper 9a are equal to each other and the distances (b) and (d) from the upper and lower ends of the recording paper 9a are also equal to each other. A rear surface printing data outputting part 1b outputs to the program 5a printing data of a pattern which is symmetric to the printing pattern output by the outputting part 1a with respect to the longitudinal central line thereof. The program 5a controls a printing apparatus 8a, thereby making the apparatus 8a print front surface printing data on the front surface of the recording paper 9a. After indicating the reversal of the front and rear surfaces, the program 5a makes the printing apparatus 8a print the rear surface printing data on the rear surface of the recording paper 9a. Accordingly, a printing deviation can be checked by seeing through the printed patterns on both surfaces of the recording paper 9a.

Description

[Detailed Description of the Invention] [Summary] An object of the present invention is to provide a method that can accurately and efficiently inspect printing misalignment in a printing device that uses standard recording paper. A method for inspecting the printing misalignment of a printing device that prints on standard recording paper, wherein each side is a rectangle parallel to the four sides of the recording paper, and the distance between the corresponding sides of the recording paper and the rectangle is creating print data that draws a rectangle on the recording paper with equal distances on the top and bottom sides and equal distances on the left and right sides, outputting the print data to the printing device and printing on one side of the recording paper; The recording paper printed on one side is reversed, the print data is output to the printing device and printed on the other side of the recording paper, and the printed recording paper is seen through and rectangular shapes on the front and back sides are printed. The system is configured to check for printing misalignment based on the misalignment.

[Industrial application field]

TECHNICAL FIELD The present invention relates to inspection of printing deviation in a printing apparatus that uses standard recording paper (or cut paper).

In recent years, with the spread of laser printers and the like, the number of printing devices that use cut paper has been increasing.

Cut paper may cause running deviation (hereinafter referred to as skew) or poor printing positioning, and a method for easily inspecting printing deviation is desired.

[Conventional technology]

Conventionally, printing misalignment has been inspected by visually inspecting the distance of the printing position from the edge of the recording paper or by measuring it with a scale.

[Problem to be solved by the invention]

As described above, the conventional methods have problems in that precise inspection cannot be performed by visual inspection, and inspection using a scale is time-consuming and inefficient, especially when inspecting a large amount of printed results.

An object of the present invention is to provide a method that can accurately and efficiently inspect printing misalignment.

[Means to solve the problem]

FIG. 1 shows a flow chart of the principle of the present invention.

In the figure: ■ A rectangle whose sides are parallel to the four sides of the recording paper 9, and the distance between the corresponding sides of the recording paper 9 and the rectangle are equal on the top and bottom sides, and equal on the left and right sides. Create print data 1 to be drawn on top.

(2) Output the print data 1 to the printing device 8 and print it on one side of the recording paper 9.

(2) Turn over the recording paper 9 printed on one side.

(2) Output the print data 1 to the printing device 8 and print it on the other side of the recording paper 9.

(2) The printed recording paper 9 is seen through and the printing misalignment is inspected based on the misalignment of the rectangles on the front and back sides.

[Effect]

According to the present invention, the print data 1 that draws a rectangle on a standard recording paper 9 is outputted to the printing device 8 and printed on one side of the recording paper 9, and then the recording paper 9 is turned upside down and the print data 1 is similarly printed on the other side of the recording paper 9, so that it is possible to inspect the printing misalignment by looking through the printed recording paper 9 and observing the misalignment of the rectangles on the front and back sides.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to a block diagram showing an embodiment of the present invention in FIG. 2 and an example of a printing pattern in FIG. 3. The same reference numerals indicate the same objects throughout the figures. Second
In the figure, parts corresponding to FIG. 1 are surrounded by a dashed line.

In FIG. 2, the human output control program 5a controls the operation of the printing device 8a and transfers manually input print data to recording paper (cut paper) 9
Print on a.

The test program 1o starts the input/output control program 5a according to the programmed test items and
Test various functions of a.

As shown in FIG. 3(a), the front side print data output unit 1f has a rectangle with equal distances a and C from the left and right ends of the recording paper 9a, and equal distances d from the top and bottom ends, and a rectangle on the left and right sides. Print data that depicts a pattern with contrasting characters (H, T, I, 0, etc.) is output to the input/output control program 5a.

As shown in FIG. 3, the back side print data output unit 1b outputs print data such that the print pattern produced by the front side print data output unit 1f is shifted in line contrast with respect to the vertical center line of the recording paper 9a. Output to the input/output control program 5a.

Therefore, (1) The front side print data output unit 1f outputs print data of rectangles and characters to be printed on the front side of the recording paper, and the input/output control program 5a controls the printing device 8a to print the print data on the front side of the recording paper 9a. do.

■The test program 10 starts the input/output control program 5a to execute back side printing when the printing device 8a has a double-sided printing function, and when the printing device 8a has a single-sided printing function, repeats the above operation (■) to print the required number of sheets. After performing this, it is displayed on a display (not shown) to instruct the operator to turn over the printed recording paper, and the process moves on to printing on the back side.

(2) The back side printing data output unit 1b outputs print data of rectangles and characters to be printed on the back side of the recording paper, and the human output control program 5a controls the printing device 8a to print the print data on the back side of the recording paper 9a.

(2) Inspect the rectangular and character patterns printed on both sides of the recording paper 9a to check for printing misalignment. That is, when viewed through, the rectangle and characters overlap and appear as one when there is no printing misalignment, and they appear double when there is printing misalignment.

〔Effect of the invention〕

As explained above, according to the present invention, a rectangular (or left-right symmetrical character) pattern is printed at the required positions on the front and back sides of the recording paper, so that printing misalignment can be accurately detected simply by looking through the paper.
Moreover, there is an effect that inspection can be carried out efficiently.

[Brief explanation of drawings]

FIG. 1 is a flowchart of the principle of the present invention, FIG. 2 is a block diagram showing an embodiment of the invention, and FIG. 3 is an example of a printing pattern. In the figure, 1 is the print data, 1f is the front side print data output section, 1b is the back side print data output section, 5a is the input/output control program, 8.8a is the printing device, 9.9a is the recording paper, and 10 is the test program!

Claims (1)

[Scope of Claims] A method for inspecting the printing deviation of a printing device (8) that prints on a regular recording paper (9), comprising a rectangle with each side parallel to the four sides of the recording paper (9), Create print data (1) that draws a rectangle on the recording paper (9) such that the distance between corresponding sides of the recording paper (9) and the rectangle is equal for the top and bottom sides, and equal for the left and right sides. , Output the print data (1) to the printing device (8) and print it on one side of the recording paper (9), turn over the recording paper (9) printed on one side, and print it on the recording paper (9). Output the print data (1) to the printing device (8), print it on the other side of the recording paper (9), see through the printed recording paper (9), and print it based on the deviation of the rectangles on the front and back sides. 1. A method for inspecting a printing device, comprising inspecting for misalignment of printing.