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US 6,645,280 B1Granted
Jet ink composition for printing watermarks
AssigneeVideojet Technologies Inc.
InventorsLinfang Zhu, Christopher D. Peterson
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AssigneeVideojet Technologies Inc.
InventorsLinfang Zhu, Christopher D. Peterson
Estimating the term…
The present invention provides a jet ink composition suitable for printing watermarks on paper substrates. The jet ink composition comprises a solvent and a translucentizing agent. An example of a translucentizing agent is sucrose acetate isobutyrate. The present invention further provides a method of ink jet printing watermark on an object comprising projecting a stream of droplets of the ink composition and controlling the direction of the stream so that the droplets form the watermark on the object. The method of the present invention has the advantage that it provides high speed watermarking capability. The method provides a further advantage that it is economical in changing the design of watermarks. The method is versatile and allows changes in the design of watermarks to be incorporated readily.
An ink composition comprising a slow evaporating solvent and a translucentizing agent, wherein the ink composition is free or substantially free of colorants and is suitable for use in ink jet printing on paper substrates, and the slow evaporating solvent is present in an amount of from about 15% by weight to about 70% by weight of the ink composition.
An ink composition comprising a slow evaporating solvent and a translucentizing agent, wherein the ink composition is free or substantially free of colorants and is suitable for use in ink jet printing on paper substrates, and the slow evaporating solvent is present in an amount of from about 5% to about 70% by weight of the ink composition, and the translucentizing agent comprises a low molecular weight material which is a sugar derivative.
A jet ink composition comprising one or more fast evaporating solvents, a co-solvent which is less volatile than n-butyl acetate, one or more high molecular weight translucentizing agents, one or more low molecular weight translucentizing agents, and a conductivity agent.
An ink composition comprising a slow evaporating solvent and a translucentizing agent, wherein the ink composition has a viscosity of up to about 50 cps at 25° C., is free or substantially free of colorants, and is suitable for use in ink jet printing on paper substrates, and the slow evaporating solvent is present in an amount of from about 15% by weight to about 70% by weight of the ink composition.
An ink composition comprising a solvent and a translucentizing agent which is a low molecular weight sugar derivative, wherein the ink composition is free or substantially free of colorants and is suitable for use in ink jet printing on paper substrates.
An ink composition comprising a slow evaporating solvent and a translucentizing agent, wherein the ink composition is free or substantially free of colorants and is suitable for use in ink jet printing on paper substrates, and the slow evaporating solvent is present in an amount of from 20% to about 70% by weight of the ink composition.
An ink composition comprising a slow evaporating solvent and a translucentizing agent, wherein the ink composition is free or substantially free of colorants and is suitable for use in ink jet printing on paper substrates, and the slow evaporating solvent is present in an amount of from about 15% to about 40% by weight of the ink composition.
An ink composition comprising a slow evaporating solvent and a translucentizing agent, wherein the ink composition is free or substantially free of colorants and is suitable for use in ink jet printing on paper substrates, and the slow evaporating solvent is present in an amount of from about 5% to about 70% by weight of the ink composition, and the translucentizing agent comprises a low molecular weight material which is a sugar or sugar derivative.
Dependencies are inferred from the claim text.