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Value and security document having a watermark and a security thread

A technology of anti-counterfeiting thread and watermark, which is applied in printing, textile and papermaking, fiber raw material processing, etc., can solve the problems of not being accurate enough, large distance, slowness, etc., and achieve the effect of increasing protection

Inactive Publication Date: 2015-12-30
GIESECKE & DEVRIENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the sheet is formed, the corresponding reference signal for unwinding the coil is fed through the monitoring unit, but disadvantageously, the distance between the coil drive mechanism to be adjusted and the position where the security thread is fixed on the cylinder and the monitoring after the sheet is formed The distance between the location where the anti-counterfeiting thread is fixed on the cylinder is very large
The regulation thus responds slowly and is not sufficiently precise

Method used

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  • Value and security document having a watermark and a security thread
  • Value and security document having a watermark and a security thread

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 A substrate 1 according to the invention is schematically shown with a strip-shaped security thread 3 . The substrate 1 has a multilevel watermark 2 in the form of a modulation of the thickness of the substrate 1, which in transmitted light represents the inscription "WASSER".

[0032]The security thread 3 is embedded in the substrate 1 and is recognizable only in transmitted light, ie when illuminated from one side and viewed from the other side, but not in incident light, ie when illuminated and viewed from the same side. The security thread 3 is introduced into the substrate 1 such that it also extends through the watermark 2 and reaches the surface of the substrate 1 in a specific area 5 of the watermark 2 so that it is also recognizable under incident light. In these specific regions 5 the modulation of the thickness of the substrate 1 via the watermark 2 leads to the fact that the substrate 1 is particularly thin.

[0033] figure 2 Shows a cross-secti...

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PUM

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Abstract

The invention relates to a value and security paper consisting of a substrate made of paper and having at least one multi-level watermark. The watermark is formed by a modulation of the substrate thickness, the density of the substrate in the watermark remaining at least substantially equal. In addition, at least one security thread designed in the form of an endless element is embedded in the substrate. According to the invention, the at least one security thread is arranged at least in part in the region of the at least one watermark and due to the modulation of the substrate thickness in the watermark, is arranged, at least in part, close to or completely on the surface of the substrate.

Description

technical field [0001] The invention relates to a value and security paper consisting of a paper substrate and having at least one multilevel watermark. The watermark is here formed by modulating the thickness of the substrate, the density of the substrate in the watermark remaining at least approximately equal. Furthermore, at least one security thread configured in the form of a ring element is embedded in the substrate. Background technique [0002] When manufacturing watermarked paper, one distinguishes between two-level watermarks with pronounced light-dark effects and multi-level watermarks with soft transitions between light and dark and detailed representations of patterns. The term "multi-level" is understood as a distinction from two-level light-dark watermarks and includes all watermarks with more than two brightness levels, and especially also watermarks with a continuous light-dark transition. To produce a multi-level watermark, a three-dimensional relief is i...

Claims

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Application Information

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IPC IPC(8): D21H21/42D21F1/44
CPCB42D25/355B42D25/333D21F1/44D21H21/42
Inventor W.菲特泽克R.西格尔R.塞德勒W.温索尔A.艾格纳A.坦彻尔B.威德纳
Owner GIESECKE & DEVRIENT GMBH