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Seamless can, printing plate, cylindrical printer for seamless can, printing method for seamless can, and method for producing seamless can

A technology of curved surface printing and printing methods, which is applied to printing machines, rotary printing machines, printing plates, etc. It can solve the problems of reducing the strength of the coating film, damaging the aesthetics of seamless cans, and easily producing scars, so as to prevent the aesthetics from being affected. The effect of reducing damage, suppressing the generation of wrinkles, and reducing the height difference

Inactive Publication Date: 2011-08-03
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But when Figure 8 In the conventional seamless tank shown, the layer thickness of the overlapping portion 240 in the ink layer 200 is close to 1.5 to 2 times the layer thickness of the ink layers 215 and 235 in the portion other than the overlapping portion, so that there is a difference between the non-overlapping portion and the overlapping portion. height difference between sections 240
If the necking process is performed on the can body having the ink layer of such a layer structure, wrinkles will be formed starting from the height difference, which will impair the aesthetics of the seamless can
In addition, since the ink layer 200 becomes thicker at the overlapping portion 240, the color tone will become particularly heavy, which will damage the aesthetics of the appearance.
[0008] In addition, even after the varnish 250 is applied to the ink layer 200, if the ink layer of the overlapping portion 240 becomes thicker, the strength of the coating film will be reduced, and scratches will easily occur.

Method used

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  • Seamless can, printing plate, cylindrical printer for seamless can, printing method for seamless can, and method for producing seamless can
  • Seamless can, printing plate, cylindrical printer for seamless can, printing method for seamless can, and method for producing seamless can
  • Seamless can, printing plate, cylindrical printer for seamless can, printing method for seamless can, and method for producing seamless can

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] Using a resin relief plate as a printing plate, and using the above-mentioned resin relief ink, a halftone dot gradation is formed at the printing start part, and a halftone dot gradation is formed at the printing end part, thereby producing a seamless can. As a result of the evaluation, the evaluation of coating film strength was ○ (H), the evaluation of shrinkage wrinkles was ○ (occurrence rate 0%), and the overall evaluation was ○.

Embodiment 2

[0154] A seamless can was produced in the same manner as in Example 1 except that solid printing was performed on the printing start portion of the printing plate. The evaluation results were Δ(F) for coating film strength, Δ for neck-in wrinkle (occurrence rate: 10%), and Δ for overall evaluation.

Embodiment 3

[0156] A seamless can was fabricated in the same manner as in Example 1, except that the printing end portion of the printing plate was solid-printed. The evaluation results were Δ(F) for coating film strength, Δ for neck-in wrinkle (occurrence rate: 14%), and Δ for overall evaluation.

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Abstract

Occurrence of wrinkles due to neck-in processing is reduced and drop in coating strength of an overlap portion is prevented by reducing the level difference between the overlap portion and an ink layer at a part continuous to the overlap portion. A seamless can is produced by transferring an ink layer onto the can body by cylindrical printing in such a manner that the transferred ink layer has an overlap portion where the ink layer is overlapped at the front and rear ends of the can body in the circumferential direction, and the ink area ratio of the ink layer at at least one of the front or rear end is smaller than that of the ink layer at a part continuous to the overlap portion excluding the overlap portion.

Description

technical field [0001] The present invention relates to seamless cans, printing plates for curved surface printing on seamless can bodies, printing machines for curved surface printing on seamless can bodies, printing machines for curved surface printing on seamless cans method, and a method for manufacturing a seamless can. Background technique [0002] In the manufacturing process of seamless cans, printing is performed on the can body after the can body, in which the can body and the bottom are integrally formed, is formed. In the curved surface printing machine used for this printing, the can main body to be printed is fitted onto a substantially cylindrical mandrel and printed while being supported by a cantilever. Cans can be printed using letterpress printing, or offset printing without a horizontal plate. [0003] For example, when using offset printing to perform curved surface printing on a can body, the blanket wheel is rotated around its central axis while pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/08B41N1/12B41N1/14B41F17/22B41M1/40B41M1/02
CPCB41F17/22B65D1/16B65D25/34B41M1/04B41M1/40B41M1/08Y10T428/1355
Inventor 仲村茂雄中里真
Owner TOYO SEIKAN KAISHA LTD
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