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US 12,472,765 B1Granted
Methods of printing document markings with enhanced moiré effects, and documents that exhibit such effects
AssigneeXerox Corporation
InventorsEdward N. Chapman, Jonathan Ireland
Life of this patent
Estimating the term…
Abstract
A substrate includes a mark that exhibits an enhanced moiré effect. In some embodiments, the mark includes multiple sets of parallel lines printed at various angles and in certain color combinations that yield the mark that causes the substrate to exhibit the enhanced moiré effect when viewed. In some embodiments, various components of a mark are printed with inks having different fluorescent properties. In some embodiments, the mark is a pattern mark that includes a checkered pattern comprising cells of multiple colors, along with broken parallel lines along edges of some or all of the cells and frame elements within some or all of the cells.
Claims26
A method of printing a mark on a substrate, the method comprising:
- by a processor, generating a pattern mark to be printed by a print engine within a boundary on a substrate by:
- generating a first set L1 of parallel lines to be printed at a first frequency F1 and a first angle A using a first color C1,
- generating a second set L2 of parallel lines to be printed at the first frequency F1 and the first angle A using a second color C2, wherein the lines of the second set L2 have a width that is a minimum width that can be printed by the print engine,
- generating a third set L3 of parallel lines to be printed at a second frequency F2 and a second angle B using a third color C3, wherein the second angle B is plus or minus approximately 90 degrees or approximately 270 degrees from the first angle A, and
- generating a fourth set L4 of parallel lines to be printed at the second frequency F2 and the second angle B using a fourth color C4, wherein the lines of the fourth set L4 have a width that is the minimum width that can be printed by the print engine,
- wherein the lines of the first set L1 and the lines of the third set L3 all have a width that is greater than the minimum width;
- and
- by the print engine, printing the pattern mark in the boundary on the substrate.
5 more elements
A substrate on which a pattern mark is printed, the pattern mark comprising:
- a first set L1 of parallel lines printed in a bounded area at a first frequency F1 and a first angle A, wherein the lines of the first set L1 exhibit a first color C1;
- a second set L2 of parallel lines printed in the bounded area at the first frequency F1 and the first angle A, wherein the lines of the second set L2 exhibit a second color C2 and have a width of one pixel;
- a third set L3 of parallel lines printed in the bounded area at a second frequency F2 and a second angle B, wherein the lines of the third set L3 exhibit a third color C3, and wherein the second angle B is plus or minus approximately 90 degrees or approximately 270 degrees from the first angle A;
- and
- a fourth set L4 of parallel lines printed in the bounded area at the second frequency F2 and the second angle B, wherein the lines of the fourth set L4 exhibit a fourth color C4, and wherein the lines of the fourth set L4 have a width of one pixel.
2 more elements
A method of printing a mark on a substrate, the method comprising:
- by a processor, generating a pattern mark to be printed by a print engine within a boundary on a substrate by:
- generating a first set L1 of parallel lines to be printed at a first frequency F1 and a first angle A using a first color C1,
- generating a second set L2 of parallel lines to be printed at the first frequency F1 and the first angle A using a second color C2, wherein the lines of the second set L2 have a width that is a minimum width that can be printed by the print engine,
- generating a third set L3 of parallel lines to be printed at a second frequency F2 and a second angle B using a third color C3, wherein the second angle B is plus or minus approximately 90 degrees or approximately 270 degrees from the first angle A, and
- generating a fourth set L4 of parallel lines to be printed at the second frequency F2 and the second angle B using a fourth color C4, wherein the lines of the fourth set L4 have a width that is the minimum width that can be printed by the print engine,
- wherein at least some of the lines of the first set L1 and second set L2 are broken lines to provide gaps in which lines of the first and second sets and lines of the third and fourth sets do not intersect;
- and
- by the print engine, printing the pattern mark in the boundary on the substrate.
5 more elements
A substrate on which a pattern mark is printed, the pattern mark comprising:
- a first set L1 of parallel lines printed in a bounded area at a first frequency F1 and a first angle A, wherein the lines of the first set L1 exhibit a first color C1;
- a second set L2 of parallel lines printed in the bounded area at the first frequency F1 and the first angle A, wherein the lines of the second set L2 exhibit a second color C2 and have a width of one pixel;
- a third set L3 of parallel lines printed in the bounded area at a second frequency F2 and a second angle B, wherein the lines of the third set L3 exhibit a third color C3, and wherein the second angle B is plus or minus approximately 90 degrees or approximately 270 degrees from the first angle A;
- and
- a fourth set L4 of parallel lines printed in the bounded area at the second frequency F2 and the second angle B, wherein the lines of the fourth set L4 exhibit a fourth color C4, and wherein the lines of the fourth set L4 have a width of one pixel,
- wherein at least some of the lines of the first set L1 and second set L2 are broken lines to provide gaps in which lines of the first and second sets and lines of the third and fourth sets do not intersect.
3 more elements
Dependencies are inferred from the claim text.