Security enhanced print media with copy protection

B - Operations – Transporting – 41 – M

Patent

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Details

B41M 3/14 (2006.01) B42D 15/00 (2006.01) G03G 21/04 (2006.01)

Patent

CA 2651304

Copy protections are incorporated into print media by embedding a plurality of latent images formed by different line-screen patterns within a visually integrated setting formed by another different line-screen pattern. The different line-screen patterns of the latent images have line frequencies empirically selected so that upon reproduction at least one of the latent images is rendered more readily discernable to the unaided eye. A masking design formed by another line-screen pattern overlies both the latent images and the visually integrated setting.

Selon l'invention, des protections contre la copie sont incorporées dans un support d'impression par l'intégration d'une pluralité d'images latentes formées par des dessins différents de trames lignées dans une composition visuellement intégrée formée par un autre dessin différent de trames lignées. Les dessins différents de trames lignées des images latentes ont des fréquences de ligne sélectionnées empiriquement de sorte que lors d'une reproduction, au moins une des images latentes est rendue plus facilement discernable à l'AEil nu. Un modèle de masquage formé par un autre dessin de trames lignées recouvre à la fois les images latentes et la composition visuellement intégrée.

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