Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Dennis P Parazak

Palitha Wickramanayake

Kai-Kong Iu

Rodney David Stramel

Raymond J Adamic

Dennis Z Guo

Zia Ur Rehman

James Pingel

Xiaohe Chen

Ronald Albert Askeland

Keshava A Prasad

Gregg A Lane

Howard Doumaux

Robert M Amici

Paul Joseph Bruinsma

Dustin W Blair

Hiang P Lauw

Yi-Hua Tsao

Mary E Austin

James A Mott

Benjamin Abelovski

Fereshteh Khorrami

Eduardo Amela

Ronald J Gambale

Ervin Mubarekyan

Melissa D Lee

Savka Ilieva Stoeva

Lidia Calvo Garcia

Tze Hwei Tseeng

Pradeep Kumar Koyadan Kizhakkedath

Kai-Kong Lu

Jennifer Tseeng

An example of an ink composition includes a pigment, an anionic polymeric dispersant, polyurethane, a co-solvent, a surfactant, tristyrylphenol ethoxylate, and a balance of water. The tristyrylphenol ethoxylate is present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition.

Ink composition and pre-treatment fixing fluid

An inkjet ink set includes a black ink, a yellow ink, a cyan ink, and a magenta ink. The magenta ink includes an ink vehicle including a polyurethane binder, and a dispersed magenta pigment in the ink vehicle. The magenta pigment is chosen from Pigment Red 282.

Inkjet ink set

An inkjet cleaning unit includes a reservoir housing an inkjet wiping fluid that includes a non-wettable material; and an applicator wick fluidly coupled to the reservoir, in which the applicator wick is configured to transport the inkjet wiping fluid from the reservoir to a surface of an inkjet material dispenser. A method for cleaning an inkjet material dispenser includes applying an inkjet wiping fluid from a reservoir housing the inkjet wiping fluid to a surface of the inkjet material dispenser; in which the inkjet wiping fluid includes a non-wettable material; and in which an applicator wick is fluidly coupled to the reservoir to transport the inkjet wiping fluid from the reservoir to the surface of the inkjet material dispenser.

Inkjet cleaning unit and method

A fluid dispensing system for ink-jet printing can comprise an ink-jet ink including anionic dye colorant and from 0.05 wt % to 1.0 wt % of an anionic dispersant polymer, and a fixer composition including a cationic crashing agent that is with a component of the ink-jet ink. The fixer composition can be stored separately from the ink-jet ink, and the fluid dispensing system can be configured for overprinting or underprinting the fixer composition with respect to the ink-jet ink.

Ink-jet printing system with reduced nozzle clogging

Compositions, systems, and methods for ink-jet printing having improved black to color bleed control, reduced wicking, and/or reduced halo are described. The composition can include a functionalized carbon pigment dispersed in an ink vehicle. The carbon pigment includes functional groups chemically attached thereto. Suitable functional groups includes an aromatic ring structure having multiple carboxyl groups (or salts thereof) attached to the aromatic ring structure, wherein at least two of the multiple carboxyl groups are positioned on adjacent carbon atoms of the aromatic ring structure.

Ink-jet inks and ink sets exhibiting reduced bleed, wicking, and/or halo effect and associated methods

An inkjet ink comprising polymeric fluoro-polymeric additives providing enhanced pen and print quality performance.

Environmentally friendly additives for inkjet inks

Ink, ink sets, and methods of printing are provided. The inks can include a plurality of dyes such that upon printing on a print medium, the printed ink or inks can maintain a neutral color, defined by an a* value from about &#x2212;1 to about 3 and having a b* value from about 3 to about &#x2212;15. This neutral color can be maintained such that the printed ink or image has these a*b* values for substantially all L* values ranging from about 25 to about 75, or even from 0 to 95.

Ink-jet inks for neutral gray and black printing

Disclosed herein are method and systems for printing a reactive ink and a fixer or second reactive ink onto a substrate from a single orifice plate, wherein orifice plate comprising at least two orifices; wherein at least one orifice prints a first reactive ink, and other orifice prints a fixer or second reactive ink. The reactive inks and the fixer reacts to form a precipitate which soluble in at least one of the fixer or the inks.

Systems and methods for printing onto a substrate using reactive ink

The present invention is drawn to methods and architecture for depositing one or more self-assembled monolayer(s) onto a print nozzle orifice plate surface. In particular, the servicing fluid includes a self-assembled monolayer-forming agent and is applied using a wiper. The wiper is configured to service and maintain an orifice plate surface having a pre-existing self-assembled monolayer, or for initial application of a self-assembled monolayer to an orifice plate.

Methods and architecture for applying self-assembled monolayer(s)

Systems and methods for providing smudge resistant and durable ink-jet images are provided. Specifically, a system for printing durable ink-jet ink images can comprise a first printhead containing a fixer composition including a charged fixer component, wherein the first printhead is configured for ink-jet printing the fixer composition on a substrate. The system can further comprise a second printhead containing an ink-jet ink, wherein the second printhead is configured for ink-jet printing the ink-jet ink composition over the fixer composition. The ink-jet ink can also include a colorant carrying an opposite charge with respect to the charged fixer component. A third printhead containing a polymer overcoat composition can also be present, and can be configured for ink-jet printing the polymer overcoat composition over ink-jet ink composition. The polymer of the polymer overcoat composition can also carry an opposite charge with respect to the charged fixer component.

Ink-jet printing methods and systems providing improved image durability

The present invention is drawn to systems and methods for remediating printhead cross-contamination wherein at least one of the ink-jet inks has undergone crashing. Specifically, a method of minimizing or reversing crashing of a first ink-jet ink that has reacted with a second ink-jet ink on a printhead can comprise the steps of dispensing a reactive cleaning fluid that is chemically configured to react with the first ink-jet ink after crashing; and cleaning a printhead having a crashed inkjet ink thereon with the reactive cleaning fluid, thereby minimizing or reverse crashing at the printhead.

Systems and methods for servicing ink-jet pens containing reactive inks

Ink-jet ink compositions are described comprising a mixture of succinic acid and at least one second organic acid. The ink-jet ink compositions alleviate color bleed, and lead to reliable pen performance when incorporated in a pen architecture.

Use of mixtures of organic acids to adjust properties of ink-jet inks

Inkjet color ink set

The ink set of this invention comprises at least two inks, one of which contains a pH sensitive polymer and pigment colorant with dispersant. A second ink is provided which comprises incompatible inorganic or organic salts or has an appropriate pH. The polymer precipitates onto a medium upon contact with the second ink, thereby providing improved bleed control.

Black to color bleed control using specific polymers in ink-jet printing inks containing pigmented inks requiring dispersants

The ink set of this invention comprises at least two inks, one of which contains a pH sensitive polymer, a glycol ether, and preferably a self-dispersing pigment colorant. A second ink is provided which comprises incompatible inorganic or organic salts or has an appropriate pH. The polymer precipitates onto a medium upon contact with the second ink, thereby providing improved dry time as well as bleed and halo control.

Growing community of inventors

Oceanside, CA, United States of America

Dennis P Parazak