Silverbrook Research Pty Ltd

Zamtec Limited

Other

Damon Donald Ridley

Kia Silverbrook

Simone Charlotte Vonwiller

Scott Matthew Starling

Lachlan Everett Hall

Sutharsiny Indusegaram

Paul Lapstun

Simon Fielder

Graciel Gonzaga

Maxine Sintic

Alexandra Artemis Papadakis

Alexander Grant

Christopher John Burns

Burkhard Raguse

Adrian Peter Bisson

Steven Carter

Leslie David Field

Roger Michael Davey

A method of minimizing kogation of a heater element in a thermal inkjet printhead. The method includes the steps of: (i) supplying an inkjet ink to a nozzle chamber of the printhead; and (ii) repeatedly actuating a heater element in the nozzle chamber so as to heat a portion of the ink to a temperature sufficient to form a bubble therein, thereby causing droplets of ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink includes a styrene-acrylic copolymer having a glass transition temperature (Tg) in the range of 5 to 30&#xb0; C. and acid value in the range of 100 180 mgKOH/g, said styrene-acrylic copolymer minimizes kogation of the heater element.

Method of minimizing kogation in thermal inkjet printheads

A method of ejecting ink from a thermal inkjet printhead. The method includes the steps of: (i) supplying an ink to at least one nozzle chamber of the printhead; and (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink is a solvent-based ink composition including: (a) 20-80 wt. % of a compound of formula (A); 

Method of ejecting solvent-based ink composition comprising pyrrolidinone solvent

A method of initiating a requested action in a computer system via a printed substrate. The substrate has human-readable information and machine-readable coded data printed thereon. The coded data is indicative of a substrate identity and of a plurality of locations on the substrate. The method comprises the steps of: (a) interacting with the substrate using an optically imaging sensing device; (b) imaging the coded data; (c) generating indicating data in the sensing device using the imaged coded data, the indicating data identifying the substrate identity and a position of the sensing device relative to the substrate; and communicating the indicating data to the computer system so that the computer system can initiate the requested action. The coded data is printed with an ink comprising an IR-absorbing naphthalocyanine dye.

Method of initiating requested action via substrate printed with naphthalocyanine dye

A salt of a sulfonated dye modulates a stability of the dye, particularly its ozonefastness. The salt comprises an organic cation selected from the group consisting of: wherein:

Sulfonated dye salts having improved stability

A sulfonated dye salt of formula (II): wherein

Gallium naphthalocyanine salts exhibiting reduced kogation

A method of preparing a sultine from a dihalogeno compound. The method comprises the steps of reacting the dihalogeno compound with a hydroxymethanesulfinate salt in a DMSO solvent so as to prepare the sultine.

Method of preparing sultines

A method of formulating an aqueous ink having minimal visible coloration. The method includes the steps of: providing an aqueous ink formulation containing a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety; and adjusting a pH of the formulation to a pH value in the range of 4 to 6.5 so as to minimize visible coloration of the formulation.

Method of formulating ink having minimal visible coloration

A solvent-based ink composition for a thermal inkjet printhead. The ink composition comprises: 

Solvent-based ink composition for thermal inkjets comprising acetate solvent

Solvent-based ink composition for thermal inkjets comprising pyrrolidinone solvent

An ink cartridge for an inkjet printer contains an aqueous ink formulation. The ink formulation comprising an IR-absorbing naphthalocyanine dye of formula (II): or a salt form thereof, wherein:M is Ga(A);Ais an axial ligand selected from &#x2014;OH, halogen, &#x2014;OR, &#x2014;OC(O)Ror &#x2014;O(CHCHO)Rwherein e is an integer from 2 to 10 and Ris H, Calkyl or C(O)Calkyl;Rand Rmay be the same or different and are selected from hydrogen or Calkoxy;Ris selected from Calkyl, Caryl, Carylalkyl or Si(R)(R)(R);Ris selected from Calkyl, Caryl or Carylalkyl; andR, Rand Rmay be the same or different and are selected from Calkyl, Caryl, Carylalkyl, Calkoxy, Caryloxy or Carylalkoxy.The ink formulation has a characteristic pH in the range of 4 to 6.5.

Ink cartridge comprising weakly acidic naphthalocyanine ink formulation

A method of modulating a stability of a sulfonated dye, particularly its ozonefastness is provided. The method comprises providing a salt of the dye, wherein the salt comprises at least one organic cation selected from the group consisting of: wherein:

Method of modulating stability of sulfonated dye

A salt of a sulfonated dye comprising an ammonium cation as a counterion. The ammonium cation comprises at least 3 hydroxyl groups. The salt is useful in reducing kogation in thermal inkjet printheads. One example of these salts is the compound of formula (II): wherein M is Ga(OH); and each of Z, Z, Zand Zis protonated 2,2-bis(hydroxymethyl)-2,2',2&#x2033;-nitrilotriethanol.

Inkjet dyes exhibiting reduced kogation

A printing module for an analog printer. The printing module includes an ink supply, a printing plate and an ink applicator for disposing ink from the ink supply onto the plate. The ink contains an IR-absorbing phthalocyanine dye formulated in a solvent-based or oil-based ink vehicle. The phthalocyanine dye has sulfonate groups, wherein a counterion of each sulfonate group is a phosphonium cation. Each phosphonium cation is of formula: P(R)(R)(R)(R); each of R, R, Rand Ris independently selected from the group consisting of: Calkyl, Caryl and Carylalkyl; and at least one of R, R, Rand Rincludes more than 4 carbon atoms.

Analog printer including ink supply containing IR-absorbing phthalocyanine dye

An aqueous formulation comprises a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety. A pH of the formulation is in the range of 4 to 6.5, which minimizes visibility of the formulation.

Aqueous formulation comprising low visibility naphthalocyanine dye

An inkjet ink comprising an IR-absorbing dye of formula (A): wherein

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Balmain, Australia

Damon Donald Ridley