Printed magnetic ink overt security image
AssigneeJDS Uniphase Corporation
InventorsVladimir P. Raksha, Cornelis Jan Delst, Paul G. Coombs, Charles T. Markantes, Alberto Argoitia
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Abstract
A security image and method of forming said image is disclosed wherein a substrate having an image or indicia thereon is coated with a dilute solution of pigment flakes in an ink or paint. The flakes are subsequently aligned in a magnetic field and are fixed after the field is applied. Most or all of the flakes in a region are aligned so as to be partially upstanding wherein their faces are essentially parallel. Coating the image with flakes yields a latent image which can be clearly seen at a small range of predetermined angles.
Claims18
A security device comprising:
- a) a substrate supporting an image;
- b) a coating of flakes supported by the substrate and covering the image thereby forming a latent image, wherein said flakes are aligned in such a manner as to obscure the image forming a latent image when viewing the security device from a first angle, and to reveal the image when viewing the security device from a second different angle, wherein the coating of flakes includes a carrier supporting the flakes and wherein the concentration of flakes within the carrier is dilute enough so as to allow the latent image to be seen or to be obscured as the substrate is tilted from one direction to another, wherein a first group of the flakes are aligned in a substantially same orientation and wherein a second group of the flakes are oriented in a substantially same orientation that differs from the orientation of the first group of flakes.
Dependencies are inferred from the claim text.