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AssigneeSecurency Pty Ltd
InventorsJohn Charles Taylor, Bruce Alfred Hardwick, Wayne Kevin Jackson, Paul Zientek, Cameron Rex Hibbert
Estimating the term…
A self-verifying security document, such as a banknote (1) comprises a flexible sheet formed from a plastics substrate (2) bearing indicia (3). The sheet has a window (5) of transparent plastics material which includes self-verification means (11) for verifying a security device (4) provided at a laterally spaced second portion of the sheet when the sheet is bent or folded to brings the window (5) into register with the security device (4). The self-verification means may be an optical lens (11) for reading an area of microprinting (10). In another embodiment, the self-verification means may be an optical filter (21) for viewing an area (22) printed with metameric inks. In other embodiments, the self-verification means and the security device (4) may be polarising windows (31, 32) or Moire inducing patterns (41, 42).
A security document, such as a banknote, comprising a single flexible sheet formed from a substrate bearing indicia, said sheet having a first portion of transparent plastics material, and a security device provided at a second position of the sheet spaced laterally from the transparent first portion, wherein the transparent first portion includes self-verification means to verify or inspect the security device when the sheet is bent, folded or twisted to bring the first and second portions into register with one another.
A security document according to any one of the preceding claims wherein the flexible sheet is generally rectangular and the first and second portions are so disposed that folding of the sheet about a centre line brings the first and second portions into register.
A security device according to any one of the preceding claims wherein the sheet is oblong having a major axis and a minor axis and the first and second portions are so disposed that folding of the sheet about a line coincident with or parallel to the major axis or the minor axis brings the first and second portions into register.
A security document comprising a sheet formed from a substrate bearing indicia, said sheet having an essentially indicia-free portion of transparent plastics material, wherein the transparent, essentially indicia-free portion includes a colour tinted optical filter for viewing an area printed with metameric inks on the same or a different security document.
A security document comprising a flexible sheet formed from a substrate bearing indicia, said sheet having an essentially indicia-free window of transparent plastics material with polarization characteristics for verifying a second transparent polarising window at another location on the same or a different security document.
A method of verifying a security document in accordance with any one of the preceding claims, wherein the method comprises the step of bending, folding or twisting the flexible sheet to bring the first portion of the sheet including the self-verifying means into register with the security device provided at the second portion of the sheet.
Dependencies are inferred from the claim text.