Assemblies and processes for producing optical effect layers comprising oriented magnetic or magnetizable pigment particles

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United States of America Patent

PATENT NO 12020864
APP PUB NO 20210319937A1
SERIAL NO

17264141

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Importance

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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 one or more indicia using a magnetic assembly comprising i) a soft magnetic plate (x31) comprising a) one or more voids (V) and b) one or more dipole magnets (x32-a), wherein the one or more dipole magnets (x32-a) are disposed within the one or more voids (V) and/or are facing said one or more voids (V), and/or one or more pairs of two dipole magnets (x32-b), wherein the dipole magnets (x32-b) of the one or more pairs are disposed below the soft magnetic plate (x31) and are spaced apart from the one or more voids (V).

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Patent Owner(s)

Patent OwnerAddress
SICPA HOLDING SA1008 PRILLY

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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