Offset printing utilizing image movement

Patent metadata

Field	Value
Publication number	US-11890888-B2
Application number	US-202217963746-A
Country	US
Kind code	B2
Filing date	Oct 11, 2022
Priority date	Oct 12, 2021
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A substrate is printed with front side and back side markings in a first color ink. The front side when viewed with reflected light includes a first marking printed in a first saturation and a first symbol printed in the first saturation. The back side when viewed with reflected light includes: a second marking printed in a second saturation; a second symbol printed in the second saturation; a third marking printed in the first saturation; and a third symbol printed in the first saturation. The first marking, the second marking, and the third marking are printed to provide an interlocking pattern of low saturation color and high saturation color when viewed with transmitted light. The second symbol is visible, and the first symbol and the second symbol are not distinguishably visible, when viewed with transmitted light.

First claim

What is claimed is:

1. A method of printing anti-counterfeit markings on a substrate having front side markings on a front side and back side markings on a back side, the method comprising:
printing with an offset printing press configured to print with a first printing plate to print on the front side of the substrate:
a first printed substrate marking printed with a first ink color at a first saturation; and
a first printed substrate symbol printed with the first ink color at the first saturation;

printing with the offset printing press configured to print with a second printing plate to print on the back side of the substrate:
a second printed substrate marking printed with a second ink color at a second saturation, the first ink color and the second ink color having a same hue, the first saturation being different from the second saturation; and
a second printed substrate symbol printed with the second ink color at the second saturation; and

printing with the offset printing press configured to print with a third printing plate to print on the back side of the substrate:
a third printed substrate marking printed with the first ink color at the first saturation; and
a third printed substrate symbol printed with the first ink color at the first saturation;

the first printed substrate marking, the second printed substrate marking, the third printed substrate marking, the first printed substrate symbol, the second printed substrate symbol, and the third printed substrate symbol being printed to provide:
a pattern of low saturation and high saturation printed substrate markings visible in the first ink color when the substrate is viewed with transmitted light;
the second printed substrate symbol visible in the second ink color in the second saturation when the substrate is viewed with transmitted light;
the first printed substrate symbol and the third printed substrate symbol being visible and indistinguishable when the substrate is viewed with transmitted light.

2. The method of claim 1 ,
wherein, when viewed with transmitted light, the first printed substrate symbol fills a first symbol space with the first ink color in the first saturation, the third printed substrate symbol fills a third symbol space with the first ink color in the first saturation, and the first printed substrate symbol and the third printed substrate symbol fill the first symbol space and the third symbol space which form a combined space in the first ink color in the first saturation in which the first printed substrate symbol and the third printed substrate symbol are visible and indistinguishable.

3. The method of claim 1 , wherein:
the first printed substrate marking is formed by printing the front side of the substrate using a first printing plate marking on the first printing plate;
the second printed substrate marking is formed by printing the back side of the substrate using a second printing plate marking on the second printing plate;
the third printed substrate marking is formed by printing the back side of the substrate using a third printing plate marking on the third printing plate marking;
the first printed substrate symbol is formed by printing the front side of the substrate using a first printing plate symbol on the first printing plate;
the second printed substrate symbol is formed by printing the back side of the substrate using a second printing plate symbol on the second printing plate; and
the third printed substrate symbol is formed by printing the back side of the substrate using a third printing plate symbol on the third printing plate.

4. The method of claim 3 ,
wherein the first printing plate symbol of the first printing plate and the third printing plate symbol of the third printing plate, when the first printing plate and the third printing plate are aligned for printing on the front side and the back side of the substrate, respectively, cover an overlapping space in which the first printing plate symbol and the third printing plate symbol are not spatially distinguishable.

5. The method of claim 3 ,
wherein the second printing plate symbol has a same pattern as the first printing plate symbol and is spaced from the first printing plate symbol by a distance when the first printing plate and the third printing plate are aligned for printing on the front side and the back side of the substrate, respectively.

6. The method of claim 3 ,
wherein the second printing plate marking overlaps the third printing plate marking when the second printing plate and the third printing plate are aligned for printing on the back side of the substrate.

7. The method of claim 3 , further comprising:
printing with the offset printing press configured to print with the first printing plate on the front side of the substrate from a first ink well; and
printing with the offset printing press configured to print with the second printing plate on the back side of the substrate from a second ink well having ink of a higher saturation than ink in the first ink well.

8. The method of claim 7 , further comprising:
printing with the offset printing press configured to print with the first printing plate on the front side of the substrate from a first ink well; and
printing with the offset printing press configured to print with the second printing plate on the back side of the substrate from a second ink well having ink of same saturation as ink in the first ink well.

9. A method of printing on two sides of a substrate using an offset printing press, the method comprising:
positioning a substrate having a front side containing a front security section and a back side containing a back security section onto an offset press;
printing with a first printing unit of the offset press:
a first printed substrate marking in a first ink color in a first saturation; and
a first printed substrate symbol in the first ink color in the first saturation;

aligning the back side of the substrate with ink from a second printing unit of the offset press within a preset threshold to ink from the first printing unit;
printing with the second printing unit:
a second printed substrate marking in a second ink color in a second saturation, the first ink color and the second ink color having a same hue, the first saturation being different from the second saturation; and
a second printed substrate symbol in the second ink color in the second saturation;

printing with a third printing unit of the offset press:
a third printed substrate marking in the first ink color in the first saturation; and
a third printed substrate symbol in the first ink color in the first saturation; and

printing the first printed substrate marking, the second printed substrate marking, the third printed substrate marking, the first printed substrate symbol, the second printed substrate symbol, and the third printed substrate symbol to provide:
a pattern of low saturation and high saturation markings visible in the first ink color when the substrate is viewed with transmitted light;
the second printed substrate symbol being visible in the second ink color in the second saturation when the substrate is viewed with transmitted light; and
the first printed substrate symbol and the third printed substrate symbol visible and indistinguishable when the substrate is viewed with transmitted light.

10. The method of claim 9 ,
wherein, when viewed with transmitted light, the first printed substrate symbol fills a first symbol space with the first ink color in the first saturation, the third printed substrate symbol fills a third symbol space with the first ink color in the first saturation, and the first printed substrate symbol and the third p

Assignees

• The Government Of The Us Secretary Of Homeland Security
• The Government Of The United States Of America Represented By The Secretary Of Homeland Security

Inventors

• Zlotnick Joel
• Brough Jordan
• Eberhardt Troy
• Mcconnell Tyra
• Gil Elizabeth
• Moran Traci

Classifications

• B42D25/309

  Photographs · CPC title

• B42D25/29 Primary

  Securities; Bank notes · CPC title

• B41F1/16

  for offset printing {(pad printing B41F17/001)} · CPC title

• B41F7/025

  Multicolour printing or perfecting on sheets or on one or more webs, in one printing unit · CPC title

• B41F31/008

  Inking devices for reversible printing presses · CPC title