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US 2016/0101639 A1Published application
Method of printing security code
AssigneeVideojet Technologies Inc.
InventorsMichael KOZEE, Jeffrey PIERCE, Michael SULLIVAN, Linfang ZHU
Life of this patent
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Abstract
A method of printing a security code on an article includes applying droplets of an ink composition with an ink jet printer to a surface of an article to print an encrypted code. The ink composition includes an organic solvent, a binder resin, and a luminescent dye.
Claims19
A method of printing a security code on an article comprising:
- applying droplets of an ink composition with an ink jet printer to a surface of an article to print a code, wherein the ink composition comprises:
- an organic solvent;
- and two or more luminescent dyes, wherein each luminescent dye has a different luminescence emission profile, wherein the luminescent dyes comprise an invisible fluorescent dye that absorbs ultraviolet light and emits visible light, and one or more visible fluorescent dyes that absorb the light emitted by the invisible fluorescent dye.
An ink jet ink composition comprising:
- an organic solvent, wherein the organic solvent comprises a ketone, an alcohol, or a mixture thereof, and is present in an amount in a range of 60% to 90% by weight of the ink composition;
- and two or more different luminescent dyes, wherein each luminescent dye has a different luminescence emission profile, wherein the luminescent dyes comprise an invisible fluorescent dye that absorbs ultraviolet light and emits visible light, and one or more visible fluorescent dyes that absorb the light emitted by the invisible fluorescent dye, wherein the luminescent dyes are selected from the classes of aromatic, substituted aromatic, heterocyclic, cyanine, xanthene, acridine, phenazine, napthol, porphyrrin, coumarin, pyrromethene, oxazine, oxazole, perylene, and napthalimide dyes, and combinations thereof.
Dependencies are inferred from the claim text.