Method for securing flexible hinges binding laminate sheets into security documents and secured security documents
View Patent ↗A security document (e.g. passport) comprising a protective feature for authenticating a laminate data sheet thereof and method for making the same. A metalized flexible hinge attached to the laminate data sheet is used to bind the laminate data sheet into the passport with one or more other sheets at a binding of the passport such that at least a portion of the metalized surface of the flexible hinge is visible proximate to the laminate data sheet. Personalization data is etched on the visible portion of the metalized surface of the flexible hinge and matches personalization data of the laminate data sheet.
1. A method for protecting the authenticity of a laminate data sheet in a bound security document, the method comprising the steps:
providing a laminate data sheet bearing personalization data and having an embedded flexible hinge comprising a metalized surface, wherein a portion of the metalized flexible hinge embedded within the laminate data sheet extends from a side of the laminate data sheet; and wherein both an upper and a lower surface of the flexible hinge are metalized,
binding together the flexible hinge embedded within the laminate data sheet and one or more other sheets to form the bound security document so that at least a portion of the metalized surface of the flexible hinge is visible proximate to the laminate data sheet of the security document; and
thereafter, laser etching personalization data onto the visible portion of the metalized surface of the flexible hinge wherein the laser etching is applied at an angle to the surface of the flexible hinge to produce offset etchings in the metalized surfaces which are viewable from different angles relative to the surfaces and the etched personalization data matches personalization data of the laminate data sheet.
2. The method according to claim 1 wherein the metalized surface of the flexible hinge comprises metal deposits forming a complex image on the flexible hinge.
3. The method according to claim 1 wherein the metalized surfaces of the flexible hinge comprise metal deposits in solid form.
4. The method according to claim 1 wherein the metalized surfaces are formed by vapour deposition.
5. The method according to claim 1 wherein the metal is aluminum.
6. The method according to claim 1 wherein the flexible hinge is comprised of nylon.
7. The method according to claim 1 further comprising coating the metalized surfaces of the flexible hinge with a protective coating.
8. The method according to claim 7 wherein the protective coating is a UV curable ink.
9. The method according to claim 1 wherein an Nd:YAG laser is used for the laser etching.