B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
B41M 3/14 (2006.01) B42D 15/00 (2006.01) B44F 1/12 (2006.01)
Patent
CA 2411853
This invention provides authenticity discriminable printed matter in which a latent image cannot be visually identified under ordinary visible light but appears upon being irradiated with UV rays. A basic image is formed on a base material. The basic image is made of a latent image portion and latent image peripheral portion. The latent image portion and latent image peripheral portion cannot be visually discriminated, and each of them is formed from a set of dots continuously laid out at a predetermined period. The resolution of the dots of the latent image portion is different from that of the dots of the latent image peripheral portion. The latent image portion and latent image peripheral portion have the same percent dot area per unit area and different dot peripheral lengths (contour lengths) per unit area. The latent image portion and latent image peripheral portion are printed by color fluorescent ink, thus obtaining printed matter.
L'invention concerne un imprimé authentifiable dans lequel se trouve une image latente qui ne peut pas être reconnue par l'oeil sous une lumière visible ordinaire mais qui apparaît lorsque elle est soumise aux rayonnements U.V. Une image de base (2) composée d'une portion d'image latente (3) et d'une portion périphérique (4) d'image latente est formée sur un substrat. La portion (3) et la portion périphérique (4) ne sont pas distinguées par l'oeil, et elles sont constituées d'un groupe de points placés à des périodes constantes. La résolution des points de la portion d'image (3) est différente de celle de la portion périphérique d'image latente. Les pourcentages surfaciques des points par unité de surface sont égaux. Les longueurs périphériques de points (longueurs de contours) par unité de surface sont différentes les unes des autres. L'imprimé est produit par impression de la portion (3) et de la portion périphérique (4) à l'aide d'une encre fluorescente couleur.
Kiuchi Masato
Okumura Hisashi
Shimada Kazuhiko
Japan As Represented By Secretary Of Agency Of Printing Bureau Ministry Of Finance
National Printing Bureau Incorporated Administrative Agency
Riches Mckenzie & Herbert Llp
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