Antifalsification document having a security thread embedded therein and a method for producing the same

US4892336A · kind A · utility

Assignee

• GAO Gesellschaft für Automation und organisation mbH · DE

Inventors

• Wittich Kaule · Grafing, DE
• Jürgen Moll · Grünwald, DE
• Gerhard Schwenk · Puchheim, DE
• Gerhard Stenzel · Germering, DE

Key dates

• Filing date: Mar 18, 1987
• Grant date: Jan 9, 1990
• Expiry date: Mar 18, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/731
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

The present invention relates to an antifalsification document having an embedded secutiry thread, and to a method for producing the same. This security thread is transparent and has a printed pattern on one side and, on the opposite side, a lenticular structure coordinated with the printed pattern. Such threads change their appearance when the viewing angle changes. To produce the security threads, a transparent film impressed with the desired lenticular relief is directed to a printing apparatus in exact register via guide elements having a relief structure that is negative with respect to the film impression, and then divided in a cutting apparatus into individual threads.