System and method for printing scratch-off lottery tickets
AssigneeScientific Games International, Inc.
InventorKenneth A. Stephens
Life of this patent
Estimating the term…
Abstract
A method for producing scratch-off lottery tickets in a high speed printing line is provided, wherein the printing line includes one or more inkjet printing machines that print lottery tickets on a continuously running paper stock. One or more primer layers are applied to a surface of the paper stock in a defined game play area on each lottery ticket. With the inkjet printing machines game play indicia is printed over the primer layers in the game play area on each lottery ticket at a resolution of at least 600 dpi. The running paper stock is conveyed through the inkjet printing machines at a rate of at least 950 ft./min. The ink jet printing machines use a specially formulated dye-based ink.
Claims21
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.
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.
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.
Dependencies are inferred from the claim text.