Machine-readable security features for printed objects
First Claim
1. A printed document including a machine-readable signal comprising:
- a first set of print structures conveyed with first ink; and
a second set of print structures convey with optical variable ink, the second set of print structures comprises breaks in lines, with the second set of print structures conveying a machine-readable plural-bit auxiliary signal,wherein the second set of print structure are provided to cooperate with the first set of print structures so that at a first observation angle the first set of print structures and the second set of print structures appear to provide a first visibly perceptible feature; and
wherein at a second observation angle the second set of print structures appear less observable so that the first set of print structures and the second set of print structures provide a second visibly perceptible feature.
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Accused Products
Abstract
The present invention relates generally to documents such as printed documents. One claim recites a printed document including a machine-readable signal. The document includes: a first set of print structures conveyed with first ink; and a second set of print structures convey with optical variable ink. The second set of print structure are provided to cooperate with the first set of print structures so that at a first observation angle the first set of print structures and the second set of print structures appear to provide a first visibly perceptible feature. At a second observation angle, the second set of print structures appear less observable so that the first set of print structures and the second set of print structures provide a second visibly perceptible feature. Of course, other claims and combinations are provided as well.
300 Citations
23 Claims
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1. A printed document including a machine-readable signal comprising:
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a first set of print structures conveyed with first ink; and a second set of print structures convey with optical variable ink, the second set of print structures comprises breaks in lines, with the second set of print structures conveying a machine-readable plural-bit auxiliary signal, wherein the second set of print structure are provided to cooperate with the first set of print structures so that at a first observation angle the first set of print structures and the second set of print structures appear to provide a first visibly perceptible feature; and wherein at a second observation angle the second set of print structures appear less observable so that the first set of print structures and the second set of print structures provide a second visibly perceptible feature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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providing a first set of print structures on a surface with first ink; and providing a second set of print structures on the surface with optical variable ink, the second set of print structures comprises breaks in one or more lines, with the second set of print structures conveying a machine-readable plural-bit auxiliary signal, the second set of print structure are provided to cooperate with the first set of print structures so that at a first observation angle the first set of print structures and the second set of print structures appear to provide a first visibly perceptible feature, and at a second observation angle the second set of print structures appear less observable so that the first set of print structures and the second set of print structures provide a second visibly perceptible feature. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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using a printing device;
i) providing a first set of print structures on a surface with first ink, and ii) providing a second set of print structures on the surface with optical variable ink, the second set of print structures comprises breaks in one or more lines, with the second set of print structures conveying a machine-readable plural-bit auxiliary signal,the second set of print structure are provided to cooperate with the first set of print structures so that at a first observation angle the first set of print structures and the second set of print structures appear to provide a first visibly perceptible feature, and at a second observation angle the second set of print structures appear less observable so that the first set of print structures and the second set of print structures provide a second visibly perceptible feature. - View Dependent Claims (20, 21, 22, 23)
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Specification