Memjet Technology Limited

Zamtec Limited

Silverbrook Research Pty Ltd

Adrian Peter Bisson

Brian Robert Brown

Galo David Jaramillo

Kia Silverbrook

Jognandan Prashar

Alexander Grant

Iain Blake

Steven Carter

Mile Jercevic

Damon Donald Ridley

Simon Fielder

Teruyuki Fukuda

Satoshi Tanaka

Richard Myors

Roger Davey

Mile Jurcevic

Jognandan Kumar Prasher

Philippa Read

Roger Michael Davey

Stephen Bernard

Jognandan Kumar Prashar

A method of inkjet printing includes the steps of: printing a first ink onto a print medium, the first ink including a first self-dispersible pigment, the first ink having a first pigment content A; and subsequently printing a second ink onto the print medium at least partially over the first ink, the second ink including a second pigment and a polymeric dispersant encapsulating the second pigment, the second ink having a second pigment content B. The first self-dispersible pigment and the second pigment have a same color; the pigment content A of the first ink and the pigment content B of the overprinted second ink have a relationship 0.8&#x2266;A/B&#x2266;1.2; and a polymer acid value of the polymeric dispersant is in the range of 100 to 170.

Method of printing pigment-based inks including ink sets, inks and printers therefor

An inkjet printer includes a stationary inkjet printhead positioned relative to a media feed direction. The printhead includes a plurality of color planes for ejecting a plurality of different inks, each color plane having a row of nozzles and each nozzle in a respective color plane being supplied with a same ink. A first ink tank containing yellow ink is in fluid communication with a first color plane of the printhead and a second ink tank containing black ink is in fluid communication with a second color plane of the printhead. The first color plane is positioned furthest upstream in the printhead with respect to the media feed direction, and the second color plane neighbors the first color plane.

Optimized color plane ordering in a high-speed inkjet printer

An inkjet printer including an inkjet printhead positioned relative to a media feed direction. The printhead has a plurality of color planes for ejecting different inks, each color plane including a nozzle row defined in a nozzle face of the printhead, and each nozzle in a respective color plane being supplied with a same ink. The printhead is plumbed such that a first color plane positioned furthest upstream with respect to the media feed direction ejects yellow ink and a second color plane neighboring the first color plane ejects black ink.

Inkjet printer having printhead plumbed for optimized color mixing

An inkjet printer includes an inkjet printhead having a plurality of color planes for ejecting a plurality of different inks. Each color plane has a nozzle row defined in a nozzle face of the printhead and each nozzle in a respective color plane is supplied with a same ink. The printhead is plumbed such that a first color plane ejecting a first ink having a relatively low luminance is sandwiched between second and third color planes ejecting respective second and third inks having a relatively high luminance. A plurality of ink reservoirs are in fluid communication with the printhead, the ink reservoirs containing the first, second and third inks. An amount of surfactant in the first ink is at least 0.4 wt % greater than an amount of surfactant in the second and third inks.

Printer for minimizing adverse mixing of high and low luminance inks at nozzle face of inkjet printhead

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 solvent-based ink composition for a thermal inkjet printhead comprises a surface-modified pigment. The ink composition comprises: 

Solvent-based inkjet inks comprising surface-modified pigments

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North Ryde, Australia

Adrian Peter Bisson