Securtiy element

Details Securtiy element Securtiy element

1994-04-12

1998-02-03

Thibodeau, Paul J.

Stock material or miscellaneous articles

Article having latent image or transformation

Striated for iridescence

101 28, 283 72, 283 91, 428142, 428187, 428458, 428908, 428913, 428916, B24D 1500, B44F 110, B32B 100

Patent

active

057142130

ABSTRACT:
A security element for the authentication of a substrate has a pattern comprising optical diffraction elements which are embossed in a carrier material of plastic material and unembossed neutral areas. On the embossing side of the carrier material a reflecting layer covers only surfaces with relief structures of the diffraction elements while the neutral areas which lie between are free of the reflecting layer and are therefore non-reflecting. If the security element is stuck in the form of a stamp onto the substrate and the carrier material is transparent, image portions, which are covered by the stamp, of a feature on the substrate can be discerned through the neutral areas.

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patent: 5106125 (1992-04-01), Antes
patent: 5145212 (1992-09-01), Mallik

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