Silverbrook Research Pty Ltd

Memjet Technology Limited

Zamtec Limited

Memjet Technologies Limited

Samuel George Mallinson

Kia Silverbrook

Brian Robert Brown

Angus John North

Garry Raymond Jackson

Michael John Hudson

Paul Justin Reichl

Norman Micheal Berry

Geordie McBain

Akira Nakazawa

Christopher Hibbard

John Douglas Peter Morgan

Paul Timothy Sharp

Mehdi Azimi

Gregory John McAvoy

Jennifer Mia Fishburn

Roger Mervyn Lloyd Foote

Philip Palma

Paul David Lunsmann

Matthew Stewart Walker

Chia-An Lin

Jognandan Prashar

Mile Jurevic

Sam Myers

Frederik Jacobus Crous

Channarayapatna Shankar Lakshmi

Benjamin Powell

Duncan McRae

Norman Michael Berry

Alexandra Artemis Papadakis

Samuel James Myers

Patrick McAuliffe

Glenn Horrocks

Jeffrey Tsang

Jeff Tsang

Christopher Barton

Nagesh Ramachandra

Graeme Lowe

David Secker

Jeffrey John Miller

Glenn David Horrocks

Aidan Patrick O'Mahony

Giedre Milinkeviciute

Lakshmi Channarayapatna Shankar

Aidan O'Mahony

Frederik Jacobus Clous

John Douglas Morgan

Paul Justin Reichi

Roger Mervyn Foote

Lakshmi Cs

Gregory John Mcavoy

Patrick Mcauliffe

Geordie Mcbain

Lakshmi CS

An inkjet nozzle device includes a main chamber having a floor, a roof and a perimeter wall extending between the floor and the roof. The main chamber includes: a firing chamber having a nozzle aperture defined in the roof and a bar heater for ejection of ink through the nozzle aperture; an antechamber for supplying ink to the firing chamber, the antechamber having a chamber inlet defined in the floor; and a baffle plate extending parallel with the bar heater, which partitions the main chamber to define the firing chamber and the antechamber. The nozzle device has mirror symmetry about a symmetry plane extending perpendicular to the longitudinal axes of the bar heater and the baffle plate.

Compact inkjet nozzle device with high degree of symmetry

An inkjet printhead includes: a fluid manifold having a base defining a plurality of fluid outlets and printhead chips attached to the base. Each printhead chip receives printing fluid from a set of the fluid outlets. All fluid outlets are flared with a respect to a width dimension of the printhead chips for facilitating removal of air bubbles.

Printhead and method for removing air bubbles

An ink tank for an ink delivery system in a printer includes: a lower portion having an ink inlet port and an ink outlet port; and an upper portion having a roof defining a tortuous vent pathway open to atmosphere via a gas port. The lower portion has a smaller volume than the upper portion.

Ink delivery system incorporating regulator tank

A method of inkjet printing includes the steps of: feeding print media past a printhead; printing onto the print media via a stream of inkjet droplets ejected from the printhead; and generating a jet flow in the vicinity of the stream of inkjet droplets, wherein the jet flow is digitally controlled.

Method of inkjet printing using digital control of jet flow in vicinity of droplets

A method of inkjet printing includes the steps of: (i) delivering ink to a printhead manifold having a longitudinal ink channel, one or printhead chips mounted to a floor of the printhead manifold and in fluid communication with the longitudinal ink channel, and a plurality of sealed air cavities positioned over the longitudinal ink channel for dampening pressure fluctuations in the ink; (ii) printing from the printhead chips; and (iii) replenishing the air cavities with air.

Method of inkjet printing with air-dampening of ink pressure fluctuations

A print assembly includes: a printhead having a plurality of inkjet nozzle devices; and an array of synthetic jet devices configured to provide a jet flow in a vicinity of ink droplets ejected by the inkjet nozzles.

Modulation of vortex oscillations in inkjet system using synthetic jets

An ink tank for an ink delivery system includes: a first ink chamber having an ink inlet port and an ink outlet port; a second ink chamber positioned above the first ink chamber and having a roof defining a tortuous vent pathway open to atmosphere via a gas port; and a diffusion tube interconnecting the first and second ink chambers. The first ink chamber has a smaller volume than the second ink chamber and the diffusion tube minimizes diffusion of air from the second chamber to the first chamber.

Ink regulator tank for use with degassed inks

An inkjet printhead including: an elongate fluid manifold having a base defining a plurality of fluid outlets; and printhead chips attached to the base, each printhead chip receiving printing fluid from a plurality of the fluid outlets. All fluid outlets are laterally flared towards a side of a respective printhead chip.

Inkjet printhead having flared outlets

An ink tank for an ink delivery system includes: a first ink chamber having an ink inlet port and an ink outlet port; a second ink chamber having a gas port open to atmosphere; and a diffusion tube interconnecting the first and second ink chambers. The first ink chamber has a smaller volume than the second ink chamber and the diffusion tube is configured to minimize diffusion of air from the second chamber to the first chamber.

Ink tank for regulating ink pressure

An inkjet printhead includes an elongate fluid manifold having a base which includes a truss structure. The truss structure has webs extending between opposite chords, wherein a plurality of openings between the webs and the chords define fluid outlets. One or more printhead chips are attached to the webs of the truss structure with each printhead chip receiving printing fluid from a plurality of the fluid outlets.

Inkjet printhead having printhead chips attached to truss structure

An inkjet printhead includes: an elongate fluid manifold including a longitudinally extending channel having a pair of opposite longitudinal sidewalls and a base defining a floor of the channel; a plurality of printhead chips bonded to the base of the fluid manifold, each printhead chip receiving ink from fluid outlets defined in the floor of the channel; and a plurality of transverse ribs extending across the channel between the sidewalls, each transverse rib extending upwardly from the floor of the channel.

Inkjet printhead having braced longitudinal channel

A method of multi-color printing in a single pass using a fixed pagewide array of monochrome inkjet printheads. The printheads are aligned with each other in a media feed direction and the method includes the steps of: feeding print media along the media feed direction past a first printhead positioned furthest upstream in the array, a third printhead downstream of the first printhead and a second printhead positioned furthest downstream in the array; printing a yellow ink onto the print media using the first printhead; printing a black ink onto the print media using the third printhead; and printing a cyan or magenta ink onto the print media using the second printhead.

Method of multi-color pagewide printing with optimized nozzle hydration

An inkjet printhead includes: an elongate fluid manifold having a base which includes a truss structure, the truss structure having webs extending between opposite chords, wherein a plurality of openings between the webs and the chords define fluid outlets; a plurality of bracing ribs extending across an upper surface of the truss structure, each bracing rib being aligned with one of the webs; and printhead chips attached to a lower surface of the truss structure, each printhead chip receiving printing fluid from a plurality of the fluid outlets.

Inkjet printhead having truss structure with bracing ribs

An inkjet printhead including: an elongate fluid manifold having a plurality of fluid outlets positioned longitudinally along a base of the fluid manifold, each neighboring pair of fluid outlets being separated by a support web; and a plurality of butting printhead chips arranged in a row and attached to the base of the fluid manifold, each printhead chip receiving a printing fluid from one or more fluid outlets. Each butting pair of printhead chips has respective butting end portions commonly supported by one of the support webs.

Inkjet printhead with butting printhead chips attached to common support web

An inkjet printhead includes: an elongate fluid manifold having at least one longitudinally extending channel, the fluid manifold having a base defining a plurality of fluid outlets, the fluid outlets being spaced apart along a floor of the channel; a plurality of printhead chips bonded to the base of the fluid manifold, each printhead chip receiving ink from one or more fluid outlets; and a plurality of transverse ribs positioned across the channel, each transverse rib extending upwardly from the floor of the channel.

Inkjet printhead with transverse ribs across fluid channel having tapered heights

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Balmain, Australia

Samuel George Mallinson