Protecting an article

B - Operations – Transporting – 42 – D

Patent

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B42D 15/00 (2006.01)

Patent

CA 2232065

An article (12), especially when in sheet form such as a document and which carries insignia like letters and numerals on a first side, is rendered tamperproof by adhering a transmissive (16), e.g. transparent layer to the first side of the article over the insignia (14), and severing the article from a second side opposed to the first side, e.g. by means of cuts, which do not penetrate through the transmissive layer (16). A second layer (18) can be adhered to the second side and the layered article can be severed also from the first side, e.g. by means of cuts which do not coincide with the cuts from the second side and which do not penetrate through the transmissive layer (16). The portions of the article carrying the insignia (14) are held in their original orientations and positions by the intact portions of respectively the transmissive layer (16) and the second layer (18). If the insignia are accessed, e.g. to alter the insignia, the portions carrying the insignia (14) are no longer held in place, which is readily detectable.

On confère un état d'inviolabilité à un article, se présentant en particulier sous forme de feuille, tel qu'un document, et comportant des lettres et chiffres de type marques sur un premier côté, en collant une couche transparente (16) sur le premier côté de l'article par dessus les marques (14), et en séparant le second côté de l'article opposé au premier en procédant, p. ex., à des découpes sans pénétrer dans la couche transparente (16). Une seconde couche (18) peut être collée sur le second côté et l'article en couches peut être également sectionné du premier côté sans que les découpes coïncident avec celles du second côté et sans qu'elles pénètrent dans la couche transparente (16). Les parties de l'article supportant les marques (14) sont maintenues dans leurs orientations et positions d'origine par des zones intactes de la couche transparente (16) et de la seconde couche (18) respectivement. Si on accède aux marques, par exemple pour les modifier, les parties supportant ces marques (14) ne sont plus maintenues en place, ce qui peut être détecté facilement.

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