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Compound watermark anti-counterfeiting paper and manufacturing method thereof

A manufacturing method and technology of anti-counterfeiting paper, applied in chemical instruments and methods, papermaking, paper, etc., can solve the problems of unsatisfactory anti-counterfeiting effect and anti-counterfeiting strength

Active Publication Date: 2010-06-23
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the current technology of anti-counterfeiting paper, and the current rotary net banknote paper machine and fourdrinier banknote paper machine can only produce paper with a watermark on one pulp layer, the anti-counterfeiting effect and anti-counterfeiting strength are not ideal

Method used

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  • Compound watermark anti-counterfeiting paper and manufacturing method thereof
  • Compound watermark anti-counterfeiting paper and manufacturing method thereof
  • Compound watermark anti-counterfeiting paper and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Example 1 Composite of two mesh cages with graphic or text watermarks of the same diameter

[0088] It consists of two cages of the same diameter with watermark graphics or text in fixed positions. The formed pulp layer on each cage is lifted and compounded by the paper roll, and the image monitoring system installed in the wet part of the paper machine is used to monitor each. Composite accuracy of watermark graphics marked on each screen cage. After information feedback, use the synchronous drive technology of the wet end equipment of the paper machine such as screen cages to adjust the speed of each screen cage and corresponding rollers and the phase of the motor to adjust the longitudinal watermark composite position. , see Figure 1-b for synchronous control. The image monitoring system monitors and calculates the distance of the watermark mark, which is converted into a current signal and sent to the transmission control system. The speed and phase adjustment value ...

Embodiment 2

[0090] Example 2 Two cages with graphic or text watermarks of the same diameter are combined with one common cage without watermarks

[0091] a. Ordinary non-watermarked mesh cage forming pulp layer on the surface layer or bottom layer

[0092] It consists of two cages of the same diameter with watermark graphics or text in fixed positions and one common cage without watermarks, where the two cages of the same diameter with watermark graphics or text in fixed positions are in the same position Adjacent, or two are arranged in front of or behind the common cage. The formed pulp layer on each cage is uncovered and recombined by the paper roll, and the composite accuracy of the watermark pattern on each cage is monitored through the image monitoring system installed in the wet part of the paper machine. After the information is fed back, the paper machine such as the cage is used. The synchronous driving technology of the wet end equipment is used to adjust the rotation speed of...

Embodiment 3 3

[0095] Example 3 Compositing of three mesh cages with graphic or text watermarks

[0096] It consists of three cages of the same diameter with watermark graphics or text in fixed positions. The formed pulp layer on each cage is lifted and compounded by the paper roll, and the image monitoring system installed in the wet part of the paper machine is used to monitor each. Composite accuracy of watermark graphics marked on each screen cage. After information feedback, use the synchronous drive technology of the wet end equipment of the paper machine such as screen cages to adjust the speed of each screen cage and corresponding rollers and the phase of the motor to adjust the longitudinal watermark composite position. , use the cage horizontal position adjustment technology to adjust the position of the horizontal watermark composite, so that the watermark graphics or text formed on the latter cage can be composited with the watermark graphics or text formed on the previous cage at...

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Abstract

The invention provides a manufacturing method of compound watermark anti-counterfeiting paper, comprising a first part paper feeding flow: (1a) a pulp layer is provided for the cylinder mould of a multivat machine for compounding, wherein the cylinder mould comprises a first cylinder mould and a second cylinder mould; the pulp layer at least comprises a first pulp layer with a first watermark and a second pulp layer with a second watermark; the pulp layer is respectively provided with a mark capable of being detected; the first pulp layer is distributed on the first cylinder mould, and the second pulp layer is distributed on the second cylinder mould. (1b) The first pulp layer and the second pulp layer are revealed and compounded and are transmitted into a second part flow by a fourdrinier wire; the second part flow is a watermark position adjusting flow comprising: (2a) monitoring the compound precision marked between pulp layers to obtain feedback information; and (2b) according to the feedback information, adjusting the watermark: using a synchronized drive technology to adjust rotation speed and carry out phase adjustment of longitudinal watermark compound position; and using a cylinder mould horizontal position adjusting technology to adjust the horizontal watermark compound position to form the compound watermark anti-counterfeiting paper.

Description

technical field [0001] The invention relates to a composite anti-counterfeit paper with watermark graphics or characters and a manufacturing method thereof. Background technique [0002] Watermark is the most widely used in paper anti-counterfeiting. According to the Eighth Interpol Conference, watermark is the first in the logical order of security features. Although watermark is ancient, it is still the most difficult to forge against color copying and computer printing. One of the anti-counterfeiting features. Traditional fourdrinier watermarking uses online forming technology in the forming process of the paper web. When the paper is just interwoven and still contains water, the wet paper is partially dislocated through a special process to form various marks or patterns. This kind of watermark forms a pattern by adjusting the thickness of the paper layer, and its pattern belongs to the paper itself inside the paper. The most complicated watermark manufacturing technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/08D21F1/44D21H27/30B32B29/06
Inventor 李策安栓印马跃飞李彩霞张业录
Owner CHINA BANKNOTE PRINTING & MINTING
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