Security element for security paper
AssigneeDe La Rue International Limited
InventorsRoland Isherwood, John Martin Haslop
Life of this patent
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Abstract
The invention relates to a security element for security paper for banknotes and the like having both aesthetic and anti-counterfeitable qualities. The invention comprises a security element for wholly or partially embedding in security paper comprising an elongate strip of a light transmitting polymeric substrate. The substrate bears a reflective metallic layer on at least one surface thereof in the form of a design. The design comprises at least one repeating geometric pattern of which one of more of the frequency, instantaneous amplitude and/or maximum amplitude of the pattern varies along the length of the element and design having at least one non-linear boundary.
Claims70
A security element for wholly or partially embedding in security paper comprising an elongate strip of a light transmitting polymeric substrate, said substrate bearing a reflective metallic layer on at least one surface thereof in the form of a design, characterised in that said design comprises at least one repeating pattern consisting of one or more lines or shapes formed by one or more lines, the pattern comprising a sequence of adjacent discrete elements each incrementally different from the preceding and following elements.
A security element for wholly or partially embedding in security paper comprising an elongate strip of a light transmitting polymeric substrate, said substrate bearing a reflective metallic layer on at least one surface thereof in the form of a design, wherein said design comprises at least one substantially continuous linearly repeating non-alphanumeric geometric pattern along the length of the security element formed from a plurality of fine lines, in which the instantaneous amplitude of the pattern varies along a length of the element, in that the at least one geometric pattern also provides a continuous metal path along the length of the element, and in that said pattern has no linear boundaries.
A security element for wholly or partially embedding in security paper comprising an elongate strip of a light transmitting polymeric substrate, said substrate bearing a reflective metallic layer on at least one surface thereof in the form of a design, wherein said design comprises at least one substantially continuous linearly repeating non-alphanumeric geometric pattern along the length of a security element formed from a plurality of fine lines, in which the frequency of the pattern varies along the length of the element, in that the at least one geometric pattern also provides a continuous metal path along the length of the element, and in that said pattern has no linear boundaries.
A security element for wholly or partially embedding in security paper comprising an elongate strip of a light transmitting polymeric substrate, said substrate bearing a reflective metallic layer on at least one surface thereof in the form of a design, wherein said design comprises at least one substantially continuous linearly repeating non-alphanumeric geometric pattern along a length of the security element formed from a plurality of fine lines, in which the maximum amplitude of the pattern varies along the length of the element, in that the at least one geometric pattern also provides a continuous metal path along the length of the element, and in that said pattern has no linear boundaries.
Dependencies are inferred from the claim text.