초록 ▼

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

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.

대표청구항 ▼

What is claimed is: 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

What is claimed is: 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. 2. The printed document of claim 1, wherein the first set of print structures and the second set of print structures comprise lines at the first observation angle. 3. The printed document of claim 1 wherein the breaks are due to the appearance of the optical variable ink at the second observation angle. 4. The printed document of claim 1 wherein the first set of print structures does not convey the plural-bit auxiliary signal. 5. The printed document of claim 1, wherein the printed document comprises at least one of an identification document, check, banknote, product packaging, label or legal document. 6. The printed document of claim 1, wherein the first visibly perceptible feature and the second visibly perceptible feature are each machine-readable. 7. The method of claim 1 wherein the machine-readable plural-bit auxiliary signal is only detectable either at the first observation angle or the second observation angle, but not at both angles. 8. A computer readable medium comprising instructions or circuitry to perform the method of claim 7. 9. A computer readable medium comprising instructions or circuitry to perform the method of claim 1. 10. A method comprising: 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. 11. The method of claim 10 where the first set of print structures and the second set of print structures comprise lines at the first observation angle. 12. The method of claim 10 where the breaks are due to the appearance of the optical variable ink at the second observation angle. 13. The method of claim 10 where the printed document comprises at least one of an identification document, check, banknote, product packaging, label or legal document. 14. The method of claim 10 where the first visibly perceptible feature and the second visibly perceptible feature are each machine-readable. 15. The method of claim 10 wherein the machine-readable plural-bit auxiliary signal is only detectable either at the first observation angle or the second observation angle, but not at both angles. 16. A computer readable medium comprising instructions or circuitry to perform the method of claim 15. 17. A computer readable medium comprising instructions or circuitry to perform the method of claim 10. 18. The method of claim 10 where said act of providing a first set of print structures and said act of providing a second set of print structures are controlled with a processor or printing device. 19. A method comprising: 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. 20. The method of claim 19 where the first set of print structures and the second set of print structures comprise lines at the first observation angle. 21. The method of claim 19 where the breaks in one or more lines are due to the appearance of the optical variable ink at the second observation angle. 22. The method of claim 19 where the printed document comprises at least one of an identification document, check, banknote, product packaging, label or legal document. 23. The method of claim 19 where the first visibly perceptible feature and the second visibly perceptible feature are each machine-readable.