US 4,892,336 · Granted 1990-01-09
Antifalsification document having a security thread embedded therein and a method for producing the same
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.
Patent details
- Publication number
- US 4,892,336
- Filing date
- 1987-03-18
- Grant date
- 1990-01-09
- Assignee
- Gao Gesellschaft Fuer Automation Und Organisation Mbh
- Inventor(s)
- KAULE; WITTICH, MOLL; JURGEN, SCHWENK; GERHARD, STENZEL; GERHARD
- CPC class
- B44B5/009
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