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US 2024/0198715 A1Published application
Optical security element
AssigneeViavi Solutions Inc.
InventorsVladimir P. RAKSHA, Cornelis Jan Delst
Life of this patent
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Abstract
An assembly including a first magnet; a substrate positioned above the first magnet, and having a surface for receiving a composition including a plurality of magnetizable platelets; and a second magnet, positioned above the substrate is disclosed. The assembly can be used in a method of making an optical security element. The optical security element and the method of making the optical security element are also disclosed.
Claims2
A method of producing an optical security element, comprising:
- moving a substrate, in a feed direction, between a first cylinder including a first magnet and a second cylinder including a second magnet;
- and
- rotating the first cylinder and the second cylinder at same speed as the substrate;
- wherein a composition including a plurality of magnetizable platelets is present on a surface of the substrate.
1 more element
Dependencies are inferred from the claim text.