Granted Patent B1

US 9,821,577 · App. 15/271,781 · Granted Nov 21, 2017

Inventor: Kenneth A. Stephens (Alpharetta, GA)

Assignee: Scientific Games International, Inc.

B41J15/04B41J2/01B41J3/543

Abstract

Claims (78)

1. A method for producing scratch-off lottery tickets in a high speed printing line, wherein the printing line includes one or more inkjet printing machines that print lottery tickets on a continuously running paper stock, the method comprising:

applying one or more primer layers to a surface of the paper stock in a defined game play area on each lottery ticket,

with one or more of the inkjet printing machining, printing game play indicia over the primer layers in the game play area on each lottery ticket at a resolution of at least 600 dpi;

conveying the running paper stock through the one or more inkjet printing machines that print the game play indicia at a rate of at least 950 ft/min;

applying an upper blocking layer over the game play indicia;

applying a scratch off coating (SOC) layer over the upper blocking layer;

printing graphics on each lottery ticket outwardly of the game play area;

wherein ink used by ink jet printing machines is a dye-based ink comprising:

a solids content of no more than 10.00% by weight;

a humectant content of more than 1.00% by weight;

a slow-evaporating solvent content of no more than 1.00% by weight;

a fast-evaporating solvent content of at least 1.00% by weight; and

a water resistant polymer content of at least 5.00% by weight; and

wherein the primer layer on which the game play indicia is printed comprises:

a plastics pigment content of 15.0 to 25.0% by weight;

an opaque polymer content of 8.0 to 15.0% by weight;

a hydrophilic silica content of 0.50 to 1.50% by weight;

a resolubility additive content of 5.0 to 15% by weight;

a plasticizer content of 2.0 to 6.0% by weight; and

a surfactant content of 1.0 to 3.0% by weight.

2. The method as in claim 1 , wherein the running paper stock is conveyed through the one or more inkjet printing machines that print the game play indicia at a rate of about 975 ft./min.

3. The method as in claim 1 , wherein the graphics are printed by one or more inkjet printing machines at a resolution of at least 600 dpi and at a rate of at least 950 ft./min.

4. The method as in claim 3 , further comprising printing graphics over the SOC layer at a resolution of at least 600 dpi and at a rate of at least 950 ft./min.

5. The method as in claim 1 , wherein the humectant content comprises sodium hydroxide and dimethylaminoethanol in about equal amounts by weight.

6. The method as in claim 1 , wherein the slow evaporating solvent is benzyl alcohol.

7. The method as in claim 1 , wherein the fast-evaporating solvent is dimethylaminoethanol.

8. The method as in claim 1 , wherein the primer layer on which the game play indicia is printed comprises:

a plastics pigment content of 15.0 to 25.0% by weight;

an opaque polymer content of 8.0 to 15.0% by weight;

a hydrophilic silica content of 0.50 to 1.50% by weight;

a resolubility additive content of 5.0 to 15% by weight;

a plasticizer content of 2.0 to 6.0% by weight; and

a surfactant content of 1.0 to 3.0% by weight.

9. A method for producing scratch-off lottery tickets in a high speed printing line, wherein the printing line includes one or more inkjet printing machines that print lottery tickets on a continuously running paper stock, the method comprising:

applying one or more primer layers to a surface of the paper stock in a defined game play area on each lottery ticket,

with one or more of the inkjet printing machining, printing game play indicia over the primer layers in the game play area on each lottery ticket at a resolution of at least 600 dpi;

conveying the running paper stock through the one or more inkjet printing machines that print the game play indicia at a rate of at least 950 ft/min;

applying an upper blocking layer over the game play indicia;

applying a scratch off coating (SOC) layer over the upper blocking layer;

printing graphics on each lottery ticket outwardly of the game play area;

wherein ink used by ink jet printing machines is a dye-based ink comprising:

a solids content of no more than 10.00% by weight;

a humectant content of more than 1.00% by weight;

a slow-evaporating solvent content of no more than 1.00% by weight;

a fast-evaporating solvent content of at least 1.00% by weight; and

a water resistant polymer content of at least 5.00% by weight; and

wherein the humectant content comprises sodium hydroxide and dimethylaminoethanol in about equal amounts by weight.

10. The method as in claim 9 , wherein the running paper stock is conveyed through the one or more inkjet printing machines that print the game play indicia at a rate of about 975 ft./min.

11. The method as in claim 9 , wherein the graphics are printed by one or more inkjet printing machines at a resolution of at least 600 dpi and at a rate of at least 950 ft./min.

12. The method as in claim 11 , further comprising printing graphics over the SOC layer at a resolution of at least 600 dpi and at a rate of at least 950 ft/min.

13. The method as in claim 9 , wherein the slow evaporating solvent is benzyl alcohol.

14. The method as in claim 9 , wherein the fast-evaporating solvent is dimethylaminoethanol.

15. The method as in claim 9 , wherein the primer layer on which the game play indicia is printed comprises:

a plastics pigment content of 15.0 to 25.0% by weight;

an opaque polymer content of 8.0 to 15.0% by weight;

a hydrophilic silica content of 0.50 to 1.50% by weight;

a resolubility additive content of 5.0 to 15% by weight;

a plasticizer content of 2.0 to 6.0% by weight; and

a surfactant content of 1.0 to 3.0% by weight.

16. A method for producing scratch-off lottery tickets in a high speed printing line, wherein the printing line includes one or more inkjet printing machines that print lottery tickets on a continuously running paper stock, the method comprising:

applying one or more primer layers to a surface of the paper stock in a defined game play area on each lottery ticket,

with one or more of the inkjet printing machining, printing game play indicia over the primer layers in the game play area on each lottery ticket at a resolution of at least 600 dpi;

conveying the running paper stock through the one or more inkjet printing machines that print the game play indicia at a rate of at least 950 ft/min;

applying an upper blocking layer over the game play indicia;

applying a scratch off coating (SOC) layer over the upper blocking layer;

printing graphics on each lottery ticket outwardly of the game play area;

wherein ink used by ink jet printing machines is a dye-based ink comprising:

a solids content of no more than 10.00% by weight;

a humectant content of more than 1.00% by weight;

a slow-evaporating solvent content of no more than 1.00% by weight;

a fast-evaporating solvent content of at least 1.00% by weight; and

a water resistant polymer content of at least 5.00% by weight; and

wherein the slow evaporating solvent is benzyl alcohol.

17. The method as in claim 16 , wherein the running paper stock is conveyed through the one or more inkjet printing machines that print the game play indicia at a rate of about 975 ft./min.

18. The method as in claim 16 , wherein the graphics are printed by one or more inkjet printing machines at a resolution of at least 600 dpi and at a rate of at least 950 ft./min.

19. The method as in claim 18 , further comprising printing graphics over the SOC layer at a resolution of at least 600 dpi and at a rate of at least 950 ft/min.

20. The method as in claim 16 , wherein the humectant content comprises sodium hydroxide and dimethylaminoethanol in equal amounts by weight.

21. The method as in claim 16 , wherein the fast-evaporating solvent is dimethylaminoethanol.

Assignments (11)