Apparatus for orienting magnetic flakes

A printing apparatus includes a magnetic rotatable roller (710, 810) with a smooth even outer surface for aligning magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security featu...

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Bibliographic Details
Main Authors RAKSHA VLADIMIR P, HOLMAN JAY M, COOMBS PAUL G, PHILLIPS ROGER W, MARKANTES CHARLES T
Format Patent
LanguageEnglish
Polish
Published 31.10.2016
Subjects
APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
PERFORMING OPERATIONS
PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL
SPRAYING OR ATOMISING IN GENERAL
TRANSPORTING
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Summary:A printing apparatus includes a magnetic rotatable roller (710, 810) with a smooth even outer surface for aligning magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank notes. Magnetic flakes in the ink are aligned using magnetic portions of the roller (710, 810), that can be formed by permanent magnets embedded in a non-magnetic roller body, or selectively magnetized portions of a flexible magnetic cover of the roller. Selected orientation of the magnetic pigment flakes can achieve a variety of illusive optical effects that are useful for decorative or security applications.
Bibliography:Application Number: PL20070000773T