Patents by Inventor John McAvoy
John McAvoy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240059062Abstract: The present disclosure provides a printhead assembly comprising: a plurality of printhead modules (100a), including a first printhead module, a second printhead module and a third printhead module. Each of the plurality of printhead modules (100a) comprises: a plurality of printhead nozzles (126) each provided with an actuator (118) for selectively ejecting print agent therefrom; at least one print agent manifold (122, 124) providing a fluid communication pathway between at least one print agent inlet and the plurality of printhead nozzles (126); and control circuitry (104) to control the actuators (118) of the printhead module (100a) to eject print agent from the printhead nozzles (126). The first printhead module is mounted to the third printhead module via the second printhead module.Type: ApplicationFiled: December 29, 2021Publication date: February 22, 2024Inventors: Gregory John MCAVOY, Richard COULL
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Patent number: 11827018Abstract: A droplet ejector for a printhead comprises: a substrate having a mounting surface and an opposite nozzle surface; a nozzle-forming layer formed on at least a portion of the nozzle surface of the substrate; a fluid chamber defined at least in part by the substrate and at least in part by the nozzle-forming layer, the fluid chamber having a fluid chamber outlet defined at least in part by a nozzle portion of the said nozzle-forming layer, the said nozzle portion comprising an inner portion located closer to the fluid chamber outlet and an outer portion located closer to a periphery of the nozzle portion; and either or both of an inner actuator arrangement formed on the inner portion of the nozzle portion of the nozzle-forming layer and an outer actuator arrangement formed on the outer portion of the nozzle portion of the nozzle-forming layer.Type: GrantFiled: May 11, 2022Date of Patent: November 28, 2023Assignee: 3C PROJECT MANAGEMENT LIMITEDInventor: Gregory John McAvoy
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Publication number: 20230312337Abstract: A method of manufacturing a MEMS device, the MEMS device comprising a movable Micro-Electro-Mechanical piezoelectric component and a CMOS circuit configured to be in conductive communication with the Micro-Electro-Mechanical component. A plurality of CMOS circuit layers are formed on a substrate to form the CMOS circuit, the plurality of CMOS circuit layers comprising a plurality of CMOS passivation and metallisation layers. A portion of at least one of the plurality of CMOS passivation and metallisation layers is removed in a component region of the device. One or more component region layers are formed in place of the removed portion in the component region to form the movable Micro-Electro-Mechanical piezoelectric component. The one or more component region layers are different from the portion of the at least one of the plurality of CMOS passivation and metallisation layers.Type: ApplicationFiled: September 1, 2021Publication date: October 5, 2023Inventor: Gregory John MCAVOY
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Publication number: 20230182470Abstract: A droplet ejector assembly for a printhead comprises a substrate, the substrate comprising a CMOS control circuit, a plurality of layers on the first surface of the substrate, a fluid chamber having a droplet ejection outlet, and a piezoelectric actuator element formed by one or more said layers and comprising first and second electrodes in contact with a piezoelectric body. The piezoelectric actuator element defines part of the fluid chamber. At least one said electrode electrically is connected to the CMOS control circuit. The droplet ejector comprises a fluid chamber having a droplet ejection outlet. The piezoelectric actuator element is separate to the droplet ejection outlet and the piezoelectric body is formed of one or more piezoelectric materials processable at a temperature below 450° C. Thus, a CMOS control circuit is integrated with a droplet ejector assembly.Type: ApplicationFiled: May 13, 2021Publication date: June 15, 2023Inventor: Gregory John MCAVOY
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Publication number: 20220324230Abstract: A droplet ejector for a printhead comprises: a substrate having a mounting surface and an opposite nozzle surface; a nozzle-forming layer formed on at least a portion of the nozzle surface of the substrate; a fluid chamber defined at least in part by the substrate and at least in part by the nozzle-forming layer, the fluid chamber having a fluid chamber outlet defined at least in part by a nozzle portion of the said nozzle-forming layer, the said nozzle portion comprising an inner portion located closer to the fluid chamber outlet and an outer portion located closer to a periphery of the nozzle portion; and either or both of an inner actuator arrangement formed on the inner portion of the nozzle portion of the nozzle-forming layer and an outer actuator arrangement formed on the outer portion of the nozzle portion of the nozzle-forming layer.Type: ApplicationFiled: May 11, 2022Publication date: October 13, 2022Inventor: Gregory John MCAVOY
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Patent number: 11400710Abstract: A droplet ejector for a printhead comprises: a substrate having a mounting surface and an opposite nozzle surface; a nozzle-forming layer formed on at least a portion of the nozzle surface of the substrate; a fluid chamber defined at least in part by the substrate and at least in part by the nozzle-forming layer, the fluid chamber having a fluid chamber outlet defined at least in part by a nozzle portion of the said nozzle-forming layer, the said nozzle portion comprising an inner portion located closer to the fluid chamber outlet and an outer portion located closer to a periphery of the nozzle portion; and either or both of an inner actuator arrangement formed on the inner portion of the nozzle portion of the nozzle-forming layer and an outer actuator arrangement formed on the outer portion of the nozzle portion of the nozzle-forming layer.Type: GrantFiled: February 26, 2019Date of Patent: August 2, 2022Assignee: 3C PROJECT MANAGEMENT LIMITEDInventor: Gregory John McAvoy
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Patent number: 10870276Abstract: A droplet ejector for a printhead comprises: a substrate having a mounting surface and an opposite nozzle surface; at least one electronic component integrated with the substrate; a nozzle-forming layer formed on at least a portion of the nozzle surface of the substrate; a fluid chamber defined at least in part by the substrate and at least in part by the nozzle-forming layer, the fluid chamber having a fluid chamber outlet defined at least in part by a nozzle portion of the said nozzle-forming layer; a piezoelectric actuator formed on at least a portion of the nozzle portion of the nozzle-forming layer; and a protective layer covering the piezoelectric actuator and the in nozzle forming layer. The piezoelectric actuator comprises a piezoelectric body provided between first and second electrodes. At least one of the said first and second electrodes is electrically connected to the at least one electronic component.Type: GrantFiled: September 19, 2017Date of Patent: December 22, 2020Inventor: Gregory John McAvoy
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Publication number: 20200391510Abstract: A droplet ejector for a printhead comprises: a substrate having a mounting surface and an opposite nozzle surface; a nozzle-forming layer formed on at least a portion of the nozzle surface of the substrate; a fluid chamber defined at least in part by the substrate and at least in part by the nozzle-forming layer, the fluid chamber having a fluid chamber outlet defined at least in part by a nozzle portion of the said nozzle-forming layer, the said nozzle portion comprising an inner portion located closer to the fluid chamber outlet and an outer portion located closer to a periphery of the nozzle portion; and either or both of an inner actuator arrangement formed on the inner portion of the nozzle portion of the nozzle-forming layer and an outer actuator arrangement formed on the outer portion of the nozzle portion of the nozzle-forming layer.Type: ApplicationFiled: February 26, 2019Publication date: December 17, 2020Inventor: Gregory John MCAVOY
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Publication number: 20190283424Abstract: A droplet ejector for a printhead comprises: a substrate having a mounting surface and an opposite nozzle surface; at least one electronic component integrated with the substrate; a nozzle-forming layer formed on at least a portion of the nozzle surface of the substrate; a fluid chamber defined at least in part by the substrate and at least in part by the nozzle-forming layer, the fluid chamber having a fluid chamber outlet defined at least in part by a nozzle portion of the said nozzle-forming layer; a piezoelectric actuator formed on at least a portion of the nozzle portion of the nozzle-forming layer; and a protective layer covering the piezoelectric actuator and the in nozzle forming layer. The piezoelectric actuator comprises a piezoelectric body provided between first and second electrodes. At least one of the said first and second electrodes is electrically connected to the at least one electronic component.Type: ApplicationFiled: September 19, 2017Publication date: September 19, 2019Inventor: Gregory John MCAVOY
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Patent number: 9579889Abstract: A method of ejecting an ink droplet from an inkjet nozzle device having an actuator and a meniscus pinned across a nozzle opening. The method includes the steps of: delivering a sub-ejection pulse to the actuator for perturbing the meniscus from a quiescent state; and subsequently delivering an ejection pulse to the actuator at an instant when the meniscus is perturbed from its quiescent state, the ejection pulse ejecting the ink droplet from the nozzle opening. A time period between a trailing edge of the sub-ejection pulse and a leading edge of the ejection pulse controls a droplet volume of the ejected ink droplet.Type: GrantFiled: September 25, 2015Date of Patent: February 28, 2017Assignee: Memjet Technology LimitedInventors: Vincent Patrick Lawlor, Gregory John McAvoy, Ronan Padraig Sean O'Reilly, Emma Rose Kerr, Misty Bagnat
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Patent number: 9550359Abstract: An inkjet printhead integrated circuit includes: a substrate having a silicon layer; a nozzle plate disposed on the silicon layer; and embedded inkjet nozzle devices. Each inkjet nozzle device includes a nozzle chamber having a roof actuator; drive circuitry laterally disposed relative to the nozzle chamber; a connection arm extending parallel with the nozzle plate from the actuator towards the drive circuitry; and a metal via interconnecting each connection arm and the drive circuitry, the metal via extending perpendicularly to the nozzle plate. The drive circuitry is positioned proximal the nozzle plate relative to a plane of the floor.Type: GrantFiled: September 2, 2015Date of Patent: January 24, 2017Assignee: Memjet Technology LimitedInventors: Ronan Padraig Sean O'Reilly, Gregory John McAvoy, Emma Rose Kerr, Vincent Patrick Lawlor, Misty Bagnat, Brian Kevin Donohoe, Eimear Ryan
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Publication number: 20160129688Abstract: A method of ejecting an ink droplet from an inkjet nozzle device having an actuator and a meniscus pinned across a nozzle opening. The method includes the steps of: delivering a sub-ejection pulse to the actuator for perturbing the meniscus from a quiescent state; and subsequently delivering an ejection pulse to the actuator at an instant when the meniscus is perturbed from its quiescent state, the ejection pulse ejecting the ink droplet from the nozzle opening. A time period between a trailing edge of the sub-ejection pulse and a leading edge of the ejection pulse controls a droplet volume of the ejected ink droplet.Type: ApplicationFiled: September 25, 2015Publication date: May 12, 2016Inventors: Vincent Patrick Lawlor, Gregory John McAvoy, Ronan Padraig Sean O'Reilly, Emma Rose Kerr, Misty Bagnat
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Publication number: 20160075134Abstract: An inkjet printhead integrated circuit includes: a silicon-on-insulator substrate having a first layer of silicon, an insulator layer disposed on the first layer of silicon and a second layer of silicon disposed on the insulator layer; a nozzle plate disposed on the second layer of silicon; and embedded inkjet nozzle devices. Each inkjet nozzle device includes a nozzle chamber defined in the second layer of silicon, each nozzle chamber having a roof which is part of the nozzle plate; an actuator for ejecting ink through the nozzle opening; and drive circuitry connected to the actuator.Type: ApplicationFiled: September 2, 2015Publication date: March 17, 2016Inventors: Ronan Padraig Sean O'Reilly, Gregory John McAvoy, Emma Rose Kerr, Vincent Patrick Lawlor, Misty Bagnat, Brian Kevin Donohoe, Eimear Ryan
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Publication number: 20160075135Abstract: An inkjet printhead integrated circuit includes: a substrate having a silicon layer; a nozzle plate disposed on the silicon layer; and embedded inkjet nozzle devices. Each inkjet nozzle device includes a nozzle chamber having a roof actuator; drive circuitry laterally disposed relative to the nozzle chamber; a connection arm extending parallel with the nozzle plate from the actuator towards the drive circuitry; and a metal via interconnecting each connection arm and the drive circuitry, the metal via extending perpendicularly to the nozzle plate. The drive circuitry is positioned proximal the nozzle plate relative to a plane of the floor.Type: ApplicationFiled: September 2, 2015Publication date: March 17, 2016Inventors: Ronan Padraig Sean O'Reilly, Gregory John McAvoy, Emma Rose Kerr, Vincent Patrick Lawlor, Misty Bagnat, Brian Kevin Donohoe, Eimear Ryan
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Patent number: 8860788Abstract: A subject (1) is illuminated by a light source (2) and observed by a pair of cameras (3). The outputs of the cameras (3) are input to an image processor (4), operated under the control of a controller (5), which also controls operation of the light source (2). The light source (2) transmits radiation in a frequency range that is limited substantially to a region of increased opacity in the atmospheric transmission spectrum. This may enable the illumination to be quite clearly discriminated, even at relatively great distances and in bright daylight.Type: GrantFiled: September 25, 2009Date of Patent: October 14, 2014Assignee: Cybula Ltd.Inventors: James Austin, John Mcavoy, Julian Young, Mark Vernon
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Patent number: 8793873Abstract: A method of providing a printhead assembly having a hydrophilic ink pathway and a hydrophobic ink ejection face. The method includes the steps of: providing a printhead assembly comprising a printhead attached to an ink supply manifold, the printhead comprising a nozzle plate having a hydrophobic coating and a protective metal film disposed on the hydrophobic coating; treating surfaces of an ink pathway in the printhead assembly with a solution comprising an alkoxylated polyethyleneimine; drying the surfaces; and removing the protective metal film so as to reveal the hydrophobic coating.Type: GrantFiled: October 18, 2010Date of Patent: August 5, 2014Assignee: Memjet Technology Ltd.Inventors: Simon Fielder, Lewis Matich, Kia Silverbrook, Gregory John McAvoy, Rónán Pádraig Seán O'Reilly, Emma Rose Kerr
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Patent number: 8714677Abstract: A stationary pagewidth inkjet printhead has one or more nozzle rows extending along a longitudinal axis of the printhead. The printhead is comprised of a plurality of printhead modules having first and second opposite ends butted across a width of a page. Each butting pair of printhead modules defines a common join region, wherein a nozzle pitch across the join region exceeds one nozzle pitch, one nozzle pitch being defined as a minimum longitudinal distance between a pair of nozzles in a same nozzle row. A first nozzle positioned at the first end of a first printhead module in a butting pair is configured to fire ink droplets into a respective join region.Type: GrantFiled: October 1, 2010Date of Patent: May 6, 2014Assignee: Zamtec LtdInventors: Gregory John McAvoy, Emma Rose Kerr, Rónán Pádraig Seán O'Reilly, Vincent Patrick Lawlor, Misty Bagnat
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Patent number: 8672454Abstract: An inkjet printhead includes a ceramic nozzle plate having a plurality of movable portions defined therein and a polymeric material covering the nozzle plate and the plurality of movable portions.Type: GrantFiled: May 30, 2011Date of Patent: March 18, 2014Assignee: Zamtec LtdInventors: Gregory John McAvoy, Kia Silverbrook, Emma Rose Kerr, Misty Bagnat, Vincent Patrick Lawlor
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Patent number: 8622521Abstract: An inkjet printhead has a plurality of nozzles; a bubble forming chamber corresponding to each of the nozzles; and a heater element disposed in each of the bubble forming chambers. The heater element is configured for heating an ejectable liquid above its boiling point to form a gas bubble that causes the ejection of a drop from the nozzle. The heater element is comprised of titanium aluminum nitride.Type: GrantFiled: August 21, 2012Date of Patent: January 7, 2014Assignee: Zamtec LtdInventors: Kia Silverbrook, Angus John North, Gregory John McAvoy, Jennifer Mia Fishburn
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Patent number: 8608286Abstract: A method of forming an inkjet nozzle chamber includes the steps of: (a) depositing a layer of chamber material onto a substrate, the layer of chamber material defining a depth of the nozzle chamber; (b) removing a predetermined region of the layer of chamber material to define sidewalls of the nozzle chamber and an internal volume of the nozzle chamber; (c) depositing a sacrificial material to fill the internal volume contained within the sidewalls; (d) depositing a roof layer onto the sacrificial material and the sidewalls; (e) etching the roof layer to define a nozzle opening therein; and (f) removing the sacrificial material contained in the internal volume so as to form the nozzle chamber.Type: GrantFiled: January 25, 2013Date of Patent: December 17, 2013Assignee: Zamtec LimitedInventors: Gregory John McAvoy, Kia Silverbrook