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Security document

A technology for valuable documents and anti-counterfeiting paper, which is applied in the field of anti-counterfeiting paper, can solve the problem of blackening of base materials and achieve high anti-counterfeiting security

Inactive Publication Date: 2007-06-13
GIESECKE & DEVRIENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In contrast, other methods blacken the substrate material only by laser irradiation

Method used

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Embodiment Construction

[0034] FIG. 1 shows a value document 1 according to the invention in the form of a banknote. The value document 1 according to the invention has a marking 2 in the form of a number string, which is produced by the action of a laser beam and extends into the edge region of the bank note 1 .

[0035] FIG. 2 shows a detailed enlarged view of area A of FIG. 1 . This enlargement clearly shows the necessary transition of the marking 2 according to the invention within the "4" shown across the edge region between the coating 3 and the security paper 4. The marking 2 continues seamlessly and without offset at the edges of the two areas 3 , 4 . Due to the darker grayscale of the marking in the area of ​​the security paper 4, the transition is clearly visible and shows correct registration, which cannot be achieved with normal printed markings.

[0036] FIG. 3 shows a section through the value document 1 along the line B-B. In this case, a coating 3 in the form of a security element ...

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Abstract

The invention relates to a security document, such as a bank note (1), passport or similar, which comprises a security sheet (4) and a marking (2) that has been created by a laser. According to the invention, at least one sub-section of the security sheet (4) has a coating (3) and the marking (2) extends over the border region between the coating (3) and the security sheet (4). The invention also relates to a security sheet (4) and to a method for producing an inventive security document or security sheet (4).

Description

technical field [0001] The invention relates to a value document, such as a bank note, an identity card, a passport, etc., which has a security paper which has a coating in at least one partial region and markings produced by means of a laser. Furthermore, the invention relates to a security paper and a method for producing the value document and the security paper according to the invention. Background technique [0002] In particular banknotes, cheques, travel tickets, admission tickets and other documents of value made of paper are provided with security elements for counterfeiting purposes, by means of which the authenticity of the documents of value can be checked. [0003] To this end, it has been proposed to apply markings to documents by laser irradiation, thereby effecting an irreversible and visually easily detectable change in the document. For example, it is proposed in DE 28 36 529 C2 to burn the serial number into the printed ink layer by means of a suitably c...

Claims

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Application Information

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IPC IPC(8): B42D15/00B41M3/14D21H21/42
Inventor 乔格·德普塔卡尔海因茨·迈耶克里斯托弗·鲍尔达斯彼得·弗兰兹马克斯·沃伊特沃尔特·多尔夫勒
Owner GIESECKE & DEVRIENT GMBH
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