B - Operations – Transporting – 42 – D
Patent
B - Operations, Transporting
42
D
B42D 1/00 (2006.01) B42D 15/00 (2006.01) B42F 21/00 (2006.01)
Patent
CA 2054174
The invention relates to security means for securing the sequential order of the pages of a book such as a passport, or other such security document, by enabling the convenient detection of any removed pages through a visual inspection of the book. Specifically, the invention provides a means of marking the unbound vertically aligned edges of the pages of a book whereby any subsequently missing page(s) may be detected upon a visual review of the unbound side of the book. The tamper-proof book comprises a plurality of pages positioned one over another, a spine securing the first sides of the pages, the sides of the pages opposite the spine being vertically aligned to form a vertical side opposite the spine, and visually detectable markings on each one of the pages at the vertically aligned sides. The markings collectively depict a visual image across the vertical side such that the absence of any one of the successive pages is identifiable upon viewing the image. Preferably, the markings are printed by means of invisible fluorescent ink.
Canadian Bank Note Company Limited
Cassan Maclean
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