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Multi-colour offset printing method and its multi-colour offset printer

A technology of offset printing machine and color glue, which is used in printing machines, general parts of printing machinery, printing and other directions, can solve the problems of troublesome replacement and storage of printing plate cylinders of different diameters, increased cost of printing manufacturers, and high paper scrapping rate. The effect of reducing printing cost, convenient operation and low scrap rate

Inactive Publication Date: 2004-09-29
顺德鸿发机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to register the color, it is necessary to make the circumferential distance between the two printing plate cylinders on the outer circumference of the rubber cylinder equal to the integer multiple of the circumference of the printing plate cylinder, so an equal circumferential distance (an integer of the circumference of the printing plate cylinder) is formed on the rubber cylinder. Times) distribution of multiple complete multi-color images, which has the problem that the non-image area of ​​the printing plate also takes up paper
In order to save paper, it is necessary to replace the plate cylinder with a smaller diameter, and it is very troublesome to replace and store many plate cylinders with different diameters
At the same time, each printing plate cylinder needs to be mechanically adjusted to obtain the overprint effect. The time is long, the error is large, and the paper waste rate is high, resulting in an increase in the cost of the printing factory.

Method used

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  • Multi-colour offset printing method and its multi-colour offset printer
  • Multi-colour offset printing method and its multi-colour offset printer
  • Multi-colour offset printing method and its multi-colour offset printer

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A multi-color offset printing machine for four-color printing, including an inking device 1, a printing plate cylinder 3 capable of being inked by the inking device, and a rubber that can transfer ink by contacting the printing plate cylinder 3 and the web 4 to be printed Cylinder 5 and impression cylinder 6, the printing plate on the outer peripheral surface of the printing plate cylinder is provided with four image areas corresponding to four different colors, and each image area is equipped with a corresponding inking device for inking, printing The outer peripheral surface of version cylinder 3 is equally divided into five color segments in the circumferential direction, and the circumference length of each color segment is all equal to the circumference of rubber cylinder 5 outer circumference, that is to say the diameter of printing plate cylinder is Five times of that, an image area is respectively arranged on each of the four color sections, and the remaining col...

Embodiment 2

[0052] A multi-color offset printing machine for four-color printing, comprising an inking device 1, a printing plate 21 that can be inked by the inking device, and a rubber cylinder 5 that can contact the printing plate and the web 4 to be printed to transfer the ink, Described printing plate 21 is arranged on a flat plate and is a plane, is provided with equidistantly arranged in a row on this printing plate 21, corresponds to four image areas 211 of four different colors, can be inked by corresponding inking device, 212, 213, 214, the linear distance between adjacent two image areas equals the circumference of the rubber cylinder 5 outer circumferences; a guide transmission device is also provided for the outer circumferential surface of the rubber cylinder to contact each image area one by one. Contact: Downstream of the blanket cylinder 5 in the rolling direction, there is also a printing platform 31 for placing the web 4 in contact with the blanket cylinder 5 .

[0053] ...

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Abstract

A multi-colour offset printing method for web includes copying a row of same images (each for one colour) on the printing plate, applying different colour inks to relative images, sequentially making a rubber drum in contact with each images for transferring their colour inks to it, and printing on the paper with said rubber drum to obtain a multi-colour image. Its advantages are simple process, low requirement of paper and less deviation of image.

Description

(1) Technical field [0001] The present invention relates to making the ink image transfer from the plate cylinder or other devices covered with the printing plate to the rubber cylinder covered with rubber, and then transfer the ink image transferred on the above rubber to the substrate (such as paper) ) on the offset printing method and its device, more specifically, the present invention relates to a multi-color offset printing method and its device mainly used for color printing of roll materials (such as roll paper). (2) Background technology [0002] Multicolor offset printing methods and multicolor offset printing machines for printing a plurality of colors on roll-packed printing materials are well known. For example, the three-cylinder combined type: there is a plate cylinder, a rubber cylinder and an impression cylinder, and the web passes between the rubber cylinder and the impression cylinder, and each time it passes through a unit, it can print one color, such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F31/02
Inventor 冯炳辉冯禧冯显扬
Owner 顺德鸿发机械制造有限公司