Patents by Inventor Napoleon J. Leoni
Napoleon J. Leoni 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: 20240092104Abstract: An image formation device includes a support, a fluid ejection device, and a first porous element. The support is to support movement of a substrate along a travel path, while the fluid ejection device is located along the travel path to deposit droplets of ink particles within a liquid carrier onto the substrate to at least partially form an image on the substrate. The first porous element is located downstream along the travel path from the fluid ejection device to be in contact against the substrate to remove, via electroosmotic flow through the first porous element, at least a portion of the liquid carrier from the substrate.Type: ApplicationFiled: November 14, 2019Publication date: March 21, 2024Inventors: Viktor Shkolnikov, Omer Gila, Napoleon J Leoni
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Publication number: 20240092103Abstract: An image formation device includes a support to support movement of a substrate along a travel path, a fluid ejection device, and a belt. The fluid ejection device is located along the travel path to deposit droplets of ink particles within a liquid carrier onto the substrate to at least partially form an image on the substrate. The belt is a flexible belt located downstream along the travel path from the fluid ejection device and includes a contact portion to arcuately conform relative to, and be in movable contact against, a first arcuate portion of the substrate to at least partially remove the liquid carrier from the substrate.Type: ApplicationFiled: November 14, 2019Publication date: March 21, 2024Inventors: Napoleon J Leoni, Omer Gila
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Patent number: 11884058Abstract: An image formation device includes at least one frame portion supporting at least one emitter to emit airborne charges, at least one radiation element to emit radiation, and a fluid ejection device to deposit droplets of ink particles within a non-aqueous fluid carrier onto a substrate. Upon relative movement between the at least one frame portion and the substrate, the emitted airborne charges are to electrostatically fix, and the at least one radiation element is to emit radiation to cause at least further fixation of, the deposited particles relative to the substrate.Type: GrantFiled: October 29, 2019Date of Patent: January 30, 2024Assignee: Hewlett-Packard Development Company, L.P.Inventors: Rajesh Kelekar, Napoleon J. Leoni, Omer Gila
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Publication number: 20230201830Abstract: A microfluidic device includes a support and a non-contact charge depositing unit to selectively emit airborne charges of a selectable polarity. The support is to releasably support a consumable microfluidic receptacle in spaced relation to the charge depositing unit to receive the airborne charges on a portion of the consumable microfluidic receptacle to cause an electric field within the consumable microfluidic receptacle to control electrowetting movement of a liquid droplet within the consumable microfluidic receptacle.Type: ApplicationFiled: May 29, 2020Publication date: June 29, 2023Applicant: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Napoleon J. Leoni, Viktor Shkolnikov, Keith E. Moore
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Publication number: 20230173492Abstract: A consumable microfluidic receptacle includes a first sheet and a second sheet. The first sheet is electrically connectable to a ground element. The second sheet is spaced apart from the first plate, wherein the microfluidic receptacle is to receive a liquid droplet between the first and second sheets. The second sheet includes an exterior surface portion to receive releasable contact from an array of individually controllable electrodes of an electrode control element to produce an electric field from the second sheet to the first sheet to selectively pull the liquid droplet through the microfluidic receptacle. The second sheet comprises a conductive-resistant matrix and a plurality of conductive paths spaced apart throughout the matrix and oriented perpendicular to a plane through which second sheet extends.Type: ApplicationFiled: May 29, 2020Publication date: June 8, 2023Applicant: Hewlett-Packard Development Company, L.P.Inventors: Napoleon J. Leoni, Omer Gila
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Patent number: 11644732Abstract: A display device includes an electronic paper display and a ground electrode. The electronic paper display is imageable by receiving charges on a charge receiving layer of the electronic paper display. The ground electrode is opposite to the charge receiving layer of the electronic paper display and exposed at an edge of the display device.Type: GrantFiled: January 9, 2020Date of Patent: May 9, 2023Assignee: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Henryk Birecki, Napoleon J Leoni
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Patent number: 11609515Abstract: A device includes a first portion and a first charge source. The first portion is located along a travel path of a substrate and is to receive ink particles within a carrier fluid in a pattern onto the substrate to at least partially form an image. The first charge source is downstream along the travel path from the first portion and is to emit first polarity charges to charge the at least first color ink particles to move, via electrostatic attraction through the first carrier fluid, to become electrostatically fixed in the pattern relative to the substrate. Via the first charge source or a subsequent charge source, further emission of opposite second polarity charges are to maintain electrostatic fixation of the ink particles in the pattern relative to the substrate.Type: GrantFiled: October 23, 2018Date of Patent: March 21, 2023Assignee: Hewlett-Packard Development Company, L.P.Inventors: Napoleon J. Leoni, Omer Gila, Rajesh Kelekar
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Publication number: 20220371339Abstract: An image formation device includes at least one frame portion supporting at least one emitter to emit airborne charges, at least one radiation element to emit radiation, and a fluid ejection device to deposit droplets of ink particles within a non-aqueous fluid carrier onto a substrate. Upon relative movement between the at least one frame portion and the substrate, the emitted airborne charges are to electrostatically fix, and the at least one radiation element is to emit radiation to cause at least further fixation of, the deposited particles relative to the substrate.Type: ApplicationFiled: October 29, 2019Publication date: November 24, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventors: Rajesh Kelekar, Napoleon J. Leoni, Omer Gila
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Publication number: 20220371334Abstract: An image formation device includes a first portion and a second portion. The first portion along a travel path is to receive droplets of color ink particles within a dielectric carrier fluid onto a substrate to form an image. The second portion includes a charge source to emit airborne charges to charge the color ink particles to move, via attraction relative to the substrate, through the carrier fluid to become electrostatically fixed relative to the substrate and to become additionally fixed, in their electrostatically fixed position, via distance-dependent, molecular forces relative to the substrate. The duration of additional fixation via distance-dependent, molecular forces may be at least greater than a duration of the electrostatic fixation.Type: ApplicationFiled: September 12, 2018Publication date: November 24, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Rajesh Kelekar, Napoleon J Leoni
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Publication number: 20220355602Abstract: An image formation device includes a mixer, a fluid ejection device, and a liquid removal element. The mixer is to receive a first ink mixture of ink particles within a first non-aqueous liquid carrier in a first concentration, to receive a second non-aqueous liquid carrier, and to form a second ink mixture of the ink particles within both the first and second liquid carriers in a second concentration less than the first concentration. The fluid ejection device is to receive the second ink mixture and to deposit droplets of the second ink mixture onto a substrate to at least partially form an image via the ink particles. The liquid removal element is to remove the respective liquid carriers from the substrate to provide at least a portion of the second liquid carrier at the mixer to form part of the second ink mixture.Type: ApplicationFiled: October 29, 2019Publication date: November 10, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Napoleon J. Leoni, Rajesh Kelekar, Dekel Green
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Patent number: 11390091Abstract: Embodiments of the present invention are directed to systems and methods for writing on electronic paper (“e-paper”) and display platforms implemented with e-paper. In one aspect, a system for writing information to electronic paper includes a writing module and an erasing unit connected to the writing module. The erasing unit is configured to erase information stored in the electronic paper. The system also includes a writing unit connected to the writing module and is configured to write information to the electronic paper. Information is written to the electronic paper by orienting the writing module so that the electronic paper passes the erasing unit prior to passing the writing unit.Type: GrantFiled: January 15, 2020Date of Patent: July 19, 2022Assignee: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Napoleon J. Leoni, Steven Rosenberg, Henryk Birecki
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Patent number: 11392062Abstract: An image formation device includes a transfer member and a first portion to receive an electrically charged, image-receiving holder onto the transfer member. A second portion downstream from the first portion is to receive droplets of ink particles within a dielectric carrier fluid onto the electrically charged, image-receiving holder to form at least part of an image. A charge source is to emit airborne charges to charge the ink particles to move, via attraction relative to the image-receiving holder, through the carrier fluid to become electrostatically fixed relative to the image-receiving holder. A liquid removal unit is to remove at least the carrier fluid from at least a surface of the image-receiving holder. A transfer station is to transfer the ink particles of the image and the image-receiving holder together from the transfer member to an image formation medium.Type: GrantFiled: September 12, 2018Date of Patent: July 19, 2022Assignee: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Napoleon J Leoni
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Publication number: 20210382410Abstract: According to one example, there is provided an imaging system that comprises a housing, a rotatable polygon comprising multiple mirrored facets located in the housing, a laser to generate a laser beam to shine onto the polygon mirror and to reflect onto a target, and wherein, in use, the density of gas within the housing is such that turbulence-related optical distortion within the housing is not greater than a predetermined limit.Type: ApplicationFiled: August 24, 2021Publication date: December 9, 2021Applicant: HP INDIGO B.V.Inventors: Ron Emanueli, Michael Plotkin, Haim Livne, Napoleon J. Leoni
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Patent number: 11150572Abstract: According to one example, there is provided an imaging system that comprises a housing, a rotatable polygon comprising multiple mirrored facets located in the housing, a laser to generate a laser beam to shine onto the polygon mirror and to reflect onto a target, and wherein, in use, the density of gas within the housing is such that turbulence-related optical distortion within the housing is not greater than a predetermined limit.Type: GrantFiled: January 22, 2015Date of Patent: October 19, 2021Assignee: HP Indigo B.V.Inventors: Ron Emanueli, Michael Plotkin, Haim Livne, Napoleon J. Leoni
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Publication number: 20210247707Abstract: A device includes an at least partially electrically conductive transfer member to travel along a travel path and a first portion along the travel path to receive an image-receiving holder onto the transfer member. A second portion is downstream from the first portion along the travel path to receive ink particles onto the image-receiving holder to form an image, while a transfer station is to transfer the ink particles and the image-receiving holder together from the transfer member to an image formation medium. A discharge element, which is interposed between the transfer station and the first portion, is to cause discharge of the transfer member.Type: ApplicationFiled: October 29, 2018Publication date: August 12, 2021Applicant: Hewlett-Packard Development Company, L.P.Inventors: Rajesh Kelekar, Napoleon J. Leoni, Omer Gila
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Publication number: 20210240111Abstract: A device includes a first portion and a first charge source. The first portion is located along a travel path of a substrate and is to receive ink particles within a carrier fluid in a pattern onto the substrate to at least partially form an image. The first charge source is downstream along the travel path from the first portion and is to emit first polarity charges to charge the at least first color ink particles to move, via electrostatic attraction through the first carrier fluid, to become electrostatically fixed in the pattern relative to the substrate. Via the first charge source or a subsequent charge source, further emission of opposite second polarity charges are to maintain electrostatic fixation of the ink particles in the pattern relative to the substrate.Type: ApplicationFiled: October 23, 2018Publication date: August 5, 2021Applicant: Hewlett-Packard Development Company, L.P.Inventors: Napoleon J. Leoni, Omer Gila, Rajesh Kelekar
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Patent number: 11077675Abstract: An imager includes an ion-emitting unit and a conveying structure to move a passive e-paper display medium in a first orientation along a travel path and to releasably support the display medium in spaced relation to receive airborne ions from the ion-emitting unit for imaging operations.Type: GrantFiled: October 9, 2019Date of Patent: August 3, 2021Assignee: Hewlett-Packard Development Company, L.P.Inventors: Napoleon J. Leoni, Omer Gila, Henryk Birecki
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Publication number: 20210191292Abstract: An image formation device includes a transfer member and a first portion to receive an electrically charged, image-receiving holder onto the transfer member. A second portion downstream from the first portion is to receive droplets of ink particles within a dielectric carrier fluid onto the electrically charged, image-receiving holder to form at least part of an image. A charge source is to emit airborne charges to charge the ink particles to move, via attraction relative to the image-receiving holder, through the carrier fluid to become electrostatically fixed relative to the image-receiving holder. A liquid removal unit is to remove at least the carrier fluid from at least a surface of the image-receiving holder. A transfer station is to transfer the ink particles of the image and the image-receiving holder together from the transfer member to an image formation medium.Type: ApplicationFiled: September 12, 2018Publication date: June 24, 2021Applicant: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Napoleon J. Leoni
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Publication number: 20210162772Abstract: A device includes a media supply, a first portion, and a second portion. The media supply is to supply a media along a travel path and to which a ground element is to be electrically connected. The first portion along the travel path is to receive droplets of ink particles within a dielectric carrier fluid on the media to form at least a portion of an image on the media. The second portion is downstream along the travel path from the first portion and includes a charge generation portion to emit airborne charges to charge the ink particles to move, via attraction relative to the grounded media, through the received carrier fluid toward the media to become electrostatically fixed on the media.Type: ApplicationFiled: August 14, 2018Publication date: June 3, 2021Applicant: Hewlett-Packard Development Company, L.P.Inventors: Omer Gila, Napoleon J Leoni
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Patent number: 10969649Abstract: One example of a display device includes a first layer and a second layer including a conductive material. The second layer is attached to the first layer such that a surface of the second layer facing the first layer is exposed along an edge of the second layer. The second layer supports an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display. The second layer is electrically coupled to a counter-electrode of the electronic paper display.Type: GrantFiled: October 28, 2015Date of Patent: April 6, 2021Assignee: Hewlett-Packard Development Company, L.P.Inventors: Napoleon J Leoni, Omer Gila, Chuangyu Zhou, Daniel Espinosa