JP2023130269A - Printing plate checking method for gravure printing cylinder - Google Patents

Abstract

To check, in a cylinder used for gravure printing, whether or not the printing plate made on the cylinder coincides with that of the manufacturing specification of a printed product.SOLUTION: In an area corresponding to an area 5, which is a non-product part in a printed product to be printed, within a printing area 3 in an intaglio surface 2 of a cylinder 1 for gravure printing, a unique code 6 is directly marked as QR Code (R), Data Matrix, POS, etc. by engraving, and read with a handy scanner or handy terminal with direct marking scanning performance, using the code as identification information, so that the read identification information is checked against the identification information registered in the manufacturing specifications of the printed product.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for checking whether a cylinder used for gravure printing matches the production specifications of a printed product.

In gravure printing, a cylinder with an intaglio surface (cell) on its outer periphery is rotated, and base paper, such as a film that will become the printed product, is run against the cylinder under pressure, and the ink held on the intaglio surface is adsorbed onto the film or other paper surface. Migrate.

A large number of cylinders are used in one gravure printing machine, and a large number of gravure printing machines are operated in a printing factory. Therefore, it is essential to check the manufacturing specifications of the printing product to be printed to make sure there are no errors in the selection of the cylinder that has been made.

For the above-mentioned verification process, conventionally, an identification label with a unique code displayed as a QR code (registered trademark), data matrix, POS, etc. was attached to the plate cover of the cylinder, and the code of the identification label affixed to the plate cover was used. By reading it with a handy scanner, it was compared with the identification information registered in the manufacturing specifications of the printed product.

Furthermore, a method of using an RF tag instead of an identification label has also been adopted.

On the other hand, as a method of managing cylinders for gravure printing, it has been proposed to attach identification marks to the ends of the cylinders and the outer peripheral surface of the shafts (Patent Document 1).

Japanese Patent Application Publication No. 9-216335

However, with the above-mentioned method of attaching the identification label to the plate cover of the cylinder for gravure printing, printing may occur with the wrong cylinder despite the verification work due to the identification label being attached incorrectly or the cover being attached incorrectly. Accidents occurred rarely.

Further, in the verification method using RFID, there is a problem in that as the number of cylinders increases, the cost of purchasing new RF tags increases.

Furthermore, if an RF tag is attached directly to a metal cylinder for gravure printing, it cannot be read, if attached to the surface of the cylinder, it becomes a hindrance during printing, and if attached to the cylinder end, it is buried in ink, causing problems such as peeling off. occured.

For this purpose, methods such as installing a plastic pedestal inside the cylinder were taken, but the detection sensitivity was poor and problems such as the solvent and ink that entered the cylinder during printing caused it to peel off.

Furthermore, when the cylinder base material is reused after the printing is removed, the RFID data must be rewritten and reattached, which is a hassle.

Additionally, in the case of RFID, there is a risk of tags being attached incorrectly or falling off.

On the other hand, the invention described in Patent Document 1 is a means for identifying the cylinder base material itself, that is, the cylinder base material that is reused by dropping the plate. It cannot be used as a means of identifying the cylinder from which the plate that will become the cylinder was made.

The present invention was created with the aim of providing a method for collating plates for gravure printing cylinders that solves the above-mentioned problems.

In other words, the plate matching method for a cylinder for gravure printing according to the present invention is such that the plate matching method for a cylinder for gravure printing is carried out within the printing range on the intaglio surface of a cylinder for gravure printing, and in an area corresponding to a non-product part of the printed product to be printed. , a unique code is directly marked by engraving, and the above code is read as identification information with a handy scanner or handy terminal that has direct marking scanning performance, and the read identification information is used as the identification registered in the manufacturing specifications of the printed product. It is characterized by matching with information.

Further, the invention according to claim 2 is characterized in that the unique code is a QR code (registered trademark), a data matrix, a POS, a character string, etc. in the plate verification method for a cylinder for gravure printing.

Further, the invention according to claim 3 is the above-described plate verification method for a cylinder for gravure printing, characterized in that the code to be engraved is provided in a non-product area of 10 to 20 mm at both ends of the base paper of the printing product to be printed. .

According to the plate verification method for gravure printing cylinders of the present invention, a unique code is directly marked on the intaglio surface of the cylinder as a QR code (registered trademark), data matrix, POS, character string, etc., and the above code is stamped. Since the identification information is read using a handy scanner or a handy terminal that has direct marking scanning performance, the identification information can be read by handheld scanners or handheld terminals that have direct marking scanning performance, so the identification information can be read by pasting identification information on cylinder covers and cylinders, such as plate covers and RFID, which have been done so far. It becomes possible to prevent pasting errors that occur.

On the other hand, the position where the code is placed is within the printing range on the intaglio surface of the cylinder for gravure printing, and it is an area that corresponds to the non-product area of the printed product to be printed, so it should not be placed inside the product. There are no problems such as unnecessary designs being created by printing, or problems such as being placed outside the printing area and being transferred to the printing impression cylinder, causing stains on the impression cylinder and the generation of foreign matter.

Furthermore, the code is engraved within the printing range on the intaglio surface of the cylinder, that is, it is applied during the plate making process, so there is no additional cost when creating a cylinder made from a new cylinder base material. It's easy to do.

FIG. 2 is a plan view of a cylinder used in the gravure printing cylinder plate matching method of the present invention.

FIG. 1 is a plan view schematically showing a cylinder used in the gravure printing cylinder plate verification method of the present invention. Reference numeral 1 in the figure is a cylinder for known gravure printing, on which an intaglio surface 2 for holding ink is made.

Reference numeral 3 in the figure indicates a print range area. In gravure printing, a base paper such as a film that will become the printed product is run in pressure contact with the cylinder 1, and the ink held on the intaglio surface is adsorbed and transferred to the paper surface such as the film for printing, but the final printed product is printed on the printed base paper. It is obtained by cutting. Therefore, the area of the intaglio surface 2 corresponding to the product part used for the printed product is the range indicated by reference numeral 4 in the figure. At both ends of the base paper, there are non-product parts that are cut and discarded after printing, and the area of the intaglio surface corresponding to these parts is the range shown by reference numerals 5 and 5 in the figure, and a code 6 is provided here. Here, the non-product area is assumed to be an area of 10 to 20 mm at both ends of the base paper of the printed product.

Code 6 is a unique code and is directly marked by engraving as a QR code (registered trademark), data matrix, POS, character string, etc.

Cylinders for gravure printing have curved or mirrored surfaces, making it impossible for handheld scanners to read the engraved codes. However, in recent years, handheld scanners and handheld terminals for direct marking have appeared, and reading accuracy has improved, making reading easier. It has become possible.

The identification information of the cylinders for gravure printing mentioned above can be read from code 6 using a handy scanner or a handy terminal, so plate verification is performed by comparing it with the identification information registered in the manufacturing specifications of the printed product. Ru.

1 Cylinder 2 Intaglio surface 3 Print range area 4 Area corresponding to the product section 5 Area corresponding to the non-product section 6 Code

Claims (3)

A unique code is directly marked by engraving within the printing range of the intaglio surface of the cylinder for gravure printing, and corresponds to the non-product area of the printed product to be printed, and the above code is used as identification information. A cylinder plate for gravure printing, which is characterized in that the identification information read by a handy scanner with direct marking scanning performance and a handy terminal is compared with the identification information registered in the manufacturing specifications of the printed product. Matching method. 2. The method for checking plates for gravure printing cylinders according to claim 1, wherein the unique code is a QR code (registered trademark), a data matrix, a POS, a character string, or the like. 3. The method for checking plates for gravure printing cylinders according to claim 1 or 2, wherein the code to be engraved is provided in a non-product area of 10 to 20 mm at both ends of the base paper of the printing product to be printed.

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