Processes for producing optical effects layers

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United States of America Patent

PATENT NO 11577273
APP PUB NO 20210308718A1
SERIAL NO

17264229

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Abstract

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The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the present invention provides processes for optical effect layers (OEL) exhibiting two or more nested indicia using a magnetic assembly comprising i) a soft magnetic plate (x31) comprising a) one or more voids (V) and b) one or more indentations (I) and/or one or more protrusions (P), and ii) one or more dipole magnets (x32).

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Patent Owner(s)

  • SICPA HOLDING SA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Despland, Claude-Alain Prilly, CH 64 649
Mueller, Edgar Lausanne, CH 55 504
Nikseresht, Ghanepour Neda Lausanne, CH 5 12
Schmid, Mathieu Lausanne, CH 48 492

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