Security device for security substrates

Abstract

The invention relates to a security device for security substrates, such as paper, used for making security documents, such as bank notes, having anti-counterfeitable features. The security device comprises a carrier of an at least partially light transmitting polymeric material, said carrier being provided with indicia. The indicia comprise a first component being at least one non-alphanumeric pattern which repeats along the length of the device and is formed from at least one fine line, and a second component being alphanumeric characters, the two components being registered to and interlinked with each other.

Description

technical field [0001] The present invention relates to a security device for a security substrate such as paper for providing security documents such as banknotes with security features. Background technique [0002] It is generally known to include elongate elements in paper or other substrates, generally as security features. Such elements may be, for example, plastic films, metal foils, metallized plastics, threads of metal wires, strips or ribbons. These elongated elements may be incorporated into the thickness of the substrate to make imitation of the notes thus produced more difficult. These elements facilitate the verification of the document since they make the view of the document through reflected light different from that through transmitted light. To increase the security provided by the inclusion of such elongated elements, it is also known to impart to the element itself one or more verifiable properties other than the presence or absence of the element. Su...

AI Technical Summary

Problems solved by technology

This intricate fine line pattern is extremely difficult to fake with the commonly used hot stamping technique

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