MAGNETIC ASSEMBLIES AND METHODS OF PRODUCING OPTICAL EFFECT LAYERS CONTAINING ORIENTED NON-SPHERICAL MAGNETIC OR MAGNETISABLE PIGMENT PARTICLES Russian patent published in 2024 - IPC B05D5/06 B05D3/06 B05D3/00 B42D25/30 B42D25/369 B42D25/387 B42D25/41 G06K19/12 

FIELD: physics.

SUBSTANCE: group of inventions relates to magnetic assemblies and methods of producing optical effect layers (OEL), in particular to magnetic assemblies, methods of producing said OEL as anti-counterfeit agents on protected documents or protected articles or for decorative purposes. Magnetic assembly (x00) for producing an optical effect layer (OEL) on a substrate (x20) which is configured to receive the substrate (x20) in an orientation at least partially parallel to a first plane (P) and above a first plane (P) and additionally contains: a) a first magnetic field generating device (x30) comprising at least four first dipole magnets (x31), the magnetic axes of which are oriented such that they are perpendicular to the first plane (P); wherein each of the first dipole magnets (x31) is located at the intersection of at least two parallel straight lines a_i (i = 1, 2, ...) and at least two parallel straight lines b_j (j = 1, 2, ...), wherein straight lines a_i and b_j form a grid; wherein at least two first dipole magnets (x31) are located on one of straight lines a_i and at least two other first dipole magnets (x31) are located on another of straight lines a_i; wherein on each straight line a_i and on each straight line b_j north poles of adjacent first rod dipole magnets (x31) point in opposite direction; in addition, first dipole magnets (x31) of said first magnetic field generating device (x30) are partially or completely embedded in first carrier matrix (x32); and b) a second magnetic field generating device (x40) comprising one or more second dipole magnets (x41), magnetic axes of which are oriented such that they are parallel to the first plane (P), and wherein one or more second dipole magnets (x41) are partially or completely embedded in the second bearing matrix (x42). Wherein the second magnetic field generating device (x40) is located under the magnetic field generating first device (x30), and wherein each straight line a_i and vector sum H of magnetic axes of one or more second dipole magnets (x41) are not parallel and are not perpendicular to each other.

EFFECT: obtaining reliable, easy-to-implement and capable of operating at high operating speed with provision for creation of OEL magnetic assembly and method, having dynamic effect and being difficult for mass production with equipment available to counterfeiters.

14 cl, 18 dwg, 1 tbl, 2 ex