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Printing quality inspection device and printing quality inspection method

A technology of inspection device and inspection method, applied in printing, printing machine, measuring device and other directions, can solve the problem of no problem of printing quality

Active Publication Date: 2021-04-02
KOMORI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Here, in the existing printing quality inspection device, when the securities printed matter that has been imposition printed on the printing paper provided with the dynamic security thread is optically photographed to check whether the securities printed matter is printed normally, there is the following problem: The pattern of the dynamic safety line part changes due to the change, so although the printing quality is not problematic, it may be falsely detected as an abnormality

Method used

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  • Printing quality inspection device and printing quality inspection method
  • Printing quality inspection device and printing quality inspection method
  • Printing quality inspection device and printing quality inspection method

Examples

Experimental program
Comparison scheme
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no. 1 approach

[0143] Below, use Figure 1 to Figure 12 A print quality inspection device according to a first embodiment of the present invention will be described.

[0144] figure 1 The securities printing machine represented by the reference numeral 100 as a whole generally includes: a paper feeding device 2, which supplies stacked large-sheet printed matter (printed parts) 1 one by one; Six sets of printing units 3A to 3F for six-color printing; the coating unit 4 applies varnish to the printing surface of the large-sheet printed matter 1; and the paper discharge device 6 dries the coated large-sheet printed matter 1 and discharges it to the paper Station 5 is discharged.

[0145] The large-sheet printed matter 1 supplied to the sheet feeding board by the automatic sheet feeding device of the sheet feeding device 2 is aligned in the front-rear direction and the width direction by stopper and side gauge devices, and is fed to the printing unit 3A by means of a swing device. After the p...

no. 2 approach

[0285] Below, use figure 1 and Figure 10 to Figure 21D A print quality inspection device according to a second embodiment of the present invention will be described.

[0286] This embodiment differs from the first embodiment described above in the configuration of the camera and the illuminator, the configuration of the print quality inspection unit 10 , and the processing in the print quality inspection unit 10 . The other structures are substantially the same as those described in the first embodiment. Hereinafter, for the Figure 1 to Figure 12 Members serving the same functions as the above-mentioned members shown above are denoted by the same reference numerals, and repeated explanations are appropriately omitted.

[0287] Such as Figure 13 As shown, in this embodiment, on the downstream side of the impression cylinder 8 facing the coating cylinder 7 of the coating unit 4 in the conveyance direction, the monochrome camera 34A and the illuminator R are provided. (for...

no. 3 approach

[0505] Below, use Figure 22A to Figure 30 A print quality inspection device and a print quality inspection method according to a third embodiment of the present invention will be described.

[0506] Compared with the above-mentioned first embodiment, the present embodiment has Figure 23A ~ Figure 23C The configuration of the print quality inspection unit 10 shown is different from the processing of the print quality inspection unit 10 described above. Other structures are substantially the same as the first embodiment, and the following Figure 1 to Figure 12 Members serving the same functions as the above-mentioned members shown above are denoted by the same reference numerals, and repeated explanations are appropriately omitted.

[0507] In the security printing machine 100 of this embodiment, so-called imposition printing is used for Figure 22A Shown in advance is provided with the large print 1 of multi-color dynamic security thread (hereinafter referred to as dynami...

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Abstract

The invention provides a printing quality inspection device and a printing quality inspection method. The printing quality inspection device includes: an illuminator (35 or 35A~35C), which irradiates light to the printed matter (1) provided with the dynamic safety thread (1b); a camera (34 or 34A), which takes pictures of the printed matter; a printing quality inspection part (10) , the print quality of the printed matter (1) is checked based on the image data captured by the camera (34 or 34A). Wherein, the camera (34) photographs the printed matter (1) according to RGB, and the printing quality inspection part (10) conducts the inspection of the range including the dynamic security thread (1b) based on the image data of the same color system as the color of the dynamic security thread (1b). Alternatively, the illuminator (35A-35C) irradiates light of the same color as that of the dynamic security thread (1b), and a monochrome image is captured by a monochrome camera (34A).

Description

technical field [0001] The present invention relates to a printing quality inspection device and a printing quality inspection method. Background technique [0002] In securities printed matter such as banknotes in recent years, in order to carry out anti-counterfeiting, a dynamic security line whose pattern position changes with the viewing angle is set locally (a semi-cylindrical shape that can bring a three-dimensional effect to the image is set on the printed image). The convex lens is the grating, which uses the parallax of the eyes to exert the effect of depth and dynamics). [0003] This kind of securities printed matter utilizes so-called imposition printing to simultaneously print patterns of multiple securities printed matter such as 4 rows×8 columns on a piece of printing paper (large sheet of printed matter) with a dynamic security line in advance. [0004] In addition, as a conventional print quality inspection device for inspecting print quality, a device desc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/00
CPCB41F33/0036H04N23/10H04N23/56H04N23/90B42D25/355G06T7/73G06T7/90G01N21/8851G06T7/0004G06T2207/10024G06T2207/30144
Inventor 大滨贤太郎
Owner KOMORI CORP