Silverbrook Research Pty Ltd

Memjet Technology Limited

Zamtec Limited

Brian Robert Brown

Kia Silverbrook

Samuel George Mallinson

Garry Raymond Jackson

Michael John Hudson

Norman Micheal Berry

Geordie McBain

Akira Nakazawa

John Douglas Peter Morgan

Paul Justin Reichl

Christopher Hibbard

Paul Timothy Sharp

Paul Charles Knight

Saminda Jayatileke

Bruce Mervyn Horsburgh

Simon Robert Walmsley

Angus John North

Julie Catherine Hogan

John Robert Sheahan

Jognandan Prashar

Ronan Palliser

Philip Palma

Vesa Karppinen

Rodney Hardy

Caitriona Forbes

Chia-An Lin

Sam Myers

Benjamin Powell

Duncan McRae

Mile Jurevic

Norman Michael Berry

Adrian Peter Bisson

Galo David Jaramillo

Keshu Nazneen

Juliette Le Hir

Pat Lehane

Michael John Webb

Mark Jackson Pulver

Richard Thomas Plunkett

David William Jensen

Alireza Moini

Brian Christopher Morahan

Timothy Peter Gillespie

Jennifer Mia Fishburn

Samuel James Myers

Peter Allworth

William Jacob

Jeffrey Tsang

Jeff Tsang

Kieran Roughan

David Keeshan

Mile Jercevic

Colin Pickup

Jonathan Mark Bulman

Nagesh Ramachandra

Mile Jurcevic

Jognandan Kumar Prasher

Paul Justin Reichi

Sam Mallinson

Jognandan Kumar Prashar

John Douglas Morgan

Marcelle Louisa Gannon

Patrick John Mcauliffe

Julie Hogan

John Sheehan

Geordie Mcbain

Duncan Mcrae

A method of printing an image from a print chip having plurality of horizontal nozzle rows. The method includes the steps of allocating first dot data for an image line of the image to nozzles in a first row portion of a first nozzle row; allocating second dot data for the image line to nozzles in a second row portion; sending the first and second dot data to the print chip and firing respective droplets. Some bits of the first dot data correspond to pixels of the image line aligned with the second row portion, and some bits of the second dot data correspond to pixels of the image line aligned with the first row portion.

Method of monochrome printing at high speeds

A print chip includes: an elongate silicon substrate defining nominal leading and trailing longitudinal sides of the print chip; circuitry layers positioned on the silicon substrate; and a MEMS layer positioned on the circuitry layers. The MEMS layer includes a plurality of parallel nozzle rows, each nozzle row having a plurality of inkjet nozzle devices arranged in a main row portion and a dropped row portion offset from the main row portion. The circuitry layers include data latches configured to provide dot data for the inkjet nozzle devices. A first row of data latches is positioned adjacent a leading row of the main row portion, and a second row of data latches is positioned adjacent a trailing row of the dropped row portion.

Print chip configured for single-pass monochrome printing at high speeds

A method of printing an image from a printhead module having a plurality of horizontal nozzle rows. Each nozzle row has a main row portion and a corresponding dropped row portion vertically offset from the main row portion. The method includes the steps of: determining a predetermined delay for the dropped row portions based on the offset, a print speed and a print resolution; allocating dot data for image lines to respective nozzle rows based on the print speed and print resolution, sending first dot data for each main row portion and second dot data for each dropped row portion to the printhead module; and firing nozzles from the main row portions and dropped row portion in a predetermined sequence. Each dropped row portion is fired independently of its corresponding main row portion and delayed relative to its corresponding main row portion by the predetermined delay.

Method for single-pass monochrome printing at high speeds

A method of printing an image from a printhead module having a plurality of horizontal nozzle rows, the method including the steps of: allocating first dot data for an image line of the image to nozzles of a main row portion of a first nozzle row; allocating second dot data for the image line to nozzles of a dropped row portion of a second nozzle row; and sending the first and second dot data to the printhead module and firing respective droplets. Each nozzle row of the printhead module has a same number of nozzles N; and the first nozzle row and the second nozzle row are non-corresponding nozzle rows, such that a number of nozzles contained in the main portion of the first nozzle row and a number of nozzles contained in the dropped row portion of the second nozzle row is greater or fewer than N nozzles.

Mismatched nozzle rows for single-pass monochrome printing at high speeds

A method of printing an image from a printhead module having a plurality of horizontal ink planes M supplied with a same ink. Each ink plane has a nozzle row and the nozzles rows of all ink planes have vertically aligned nozzles. The method includes the steps of: defining contiguous span groups along each nozzle row, each span group containing N nozzles; allocating dot data for each image line of the image to a predetermined number of nozzles P in each span group of each nozzle row; sending the dot data to the printhead module and firing nozzles sequentially from the ink planes to print the image line. Only one nozzle from each span group in a same nozzle row is fired simultaneously, N is an integer multiple of M, and P is N divided by M.

Sub-row firing method for single-pass monochrome printing at high speeds

A method of printing an image from a printhead module having a plurality of horizontal nozzle rows. The method includes the steps of: allocating first dot data for an image line of the image to nozzles in a main row portion of a first nozzle row; allocating second dot data for the image line to nozzles in a dropped row portion of the first nozzle row; sending the first and second dot data to the printhead module and firing respective droplets. Some bits of the first dot data correspond to pixels of the image line aligned with the dropped row portion, and some bits of the second dot data correspond to pixels of the image line aligned with the main row portion.

Ramping dot data for single-pass monochrome printing at high speeds

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

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

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 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

Brian Robert Brown