Method and means for producing a magnetically induced design...

B - Operations – Transporting – 41 – M

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Details

B41M 3/14 (2006.01) B41C 1/04 (2006.01) B41M 1/42 (2006.01) B42D 15/00 (2006.01)

Patent

CA 2530153

The invention discloses a device and a method for transferring a predeterminable, high-resolution magnetic design onto a document printed with a magnetic ink, in particular a magnetic optically variable ink. The device comprises a body of a composite permanent-magnetic material, having at least one flat or curved surface engraved with indicia corresponding to the design to be transferred, wherein the said magnetic material is permanently magnetized, preferably in a direction substantially perpendicular to the said surface. The method comprises imprinting or coating a first surface of a sheet or web with a magnetic ink or coating composition, and approaching the imprinted sheet or web to the engraved surface of a body of magnetized composite permanent-magnetic material while the ink is wet, followed by hardening the ink.

L'invention concerne un dispositif et un procédé pour transférer un motif magnétique haute résolution pouvant être prédéterminé sur un document imprimé à l'aide d'une encre magnétique, notamment à l'aide d'une encre magnétique optiquement variable. Le dispositif comprend un corps d'un matériau composite à magnétisme permanent, qui possède au moins une surface plane ou incurvée portant des marques correspondant au motif à transférer, ledit matériau à magnétisme permanent étant aimanté en permanence, de préférence dans une direction sensiblement perpendiculaire à ladite surface. Le procédé consiste à imprimer ou à appliquer un revêtement sur une première surface d'une feuille ou d'un tissu avec une encre magnétique ou une composition de revêtement, et à rapprocher entre elles la feuille ou la toile imprimée et la surface gravée d'un corps du matériau composite à magnétisme permanent, ladite encre étant humide, après quoi l'encre est séchée.

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