Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing electromagnetic radiation
Patent
1987-03-18
1990-01-09
Yost, Frank T.
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing electromagnetic radiation
283113, 3501622, 350164, B42D 1500, G09F 300, G02B 518, G02B 110
Patent
active
048923362
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.
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Kaule Wittich
Moll Jurgen
Schwenk Gerhard
Stenzel Gerhard
GAO Gesellschaft fuer Automation und Organisation mbH
Heyrana Sr. Paul M.
Koch Robert J.
Yost Frank T.
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