Patents by Inventor William R. Letendre
William R. Letendre 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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Patent number: 9511598Abstract: An apparatus includes an inkjet assembly having inkjet nozzles through each of which ink flows at a nominal flow rate as it is ejected from the nozzle onto a substrate. Ink is held under a nominal negative pressure associated with a characteristic of a meniscus of the ink in the nozzle when ejection of ink from the nozzle is not occurring. The apparatus includes recirculation flow paths, each flow path having a nozzle end at which it opens into one of the nozzles and another location spaced from the nozzle end that is to be subjected to a recirculation pressure lower than the nominal negative pressure so that ink is recirculated from the nozzle through the flow path at a recirculation flow rate.Type: GrantFiled: September 28, 2015Date of Patent: December 6, 2016Assignee: FUJIFILM Dimatix, Inc.Inventors: Robert L Wells, Jr., Bailey Smith, Marlene McDonald, William R. Letendre, Matthew Aubrey, John Kelly, Darrell Herrick, Robert A. Hasenbein
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Publication number: 20160052292Abstract: An apparatus includes an inkjet assembly having inkjet nozzles through each of which ink flows at a nominal flow rate as it is ejected from the nozzle onto a substrate. Ink is held under a nominal negative pressure associated with a characteristic of a meniscus of the ink in the nozzle when ejection of ink from the nozzle is not occurring. The apparatus includes recirculation flow paths, each flow path having a nozzle end at which it opens into one of the nozzles and another location spaced from the nozzle end that is to be subjected to a recirculation pressure lower than the nominal negative pressure so that ink is recirculated from the nozzle through the flow path at a recirculation flow rate.Type: ApplicationFiled: September 28, 2015Publication date: February 25, 2016Inventors: Robert L. Wells, JR., Bailey Smith, Marlene McDonald, William R. Letendre, Matthew Aubrey, John Kelly, Darrell Herrick, Robert A. Hasenbein
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Patent number: 8752946Abstract: An apparatus includes an inkjet assembly having inkjet nozzles through each of which ink flows at a nominal flow rate as it is ejected from the nozzle onto a substrate. Ink is held under a nominal negative pressure associated with a characteristic of a meniscus of the ink in the nozzle when ejection of ink from the nozzle is not occurring. The apparatus includes recirculation flow paths, each flow path having a nozzle end at which it opens into one of the nozzles and another location spaced from the nozzle end that is to be subjected to a recirculation pressure lower than the nominal negative pressure so that ink is recirculated from the nozzle through the flow path at a recirculation flow rate.Type: GrantFiled: March 5, 2013Date of Patent: June 17, 2014Assignee: FUJIFILM Dimatix, Inc.Inventors: Robert L. Wells, Jr., Bailey Smith, Marlene McDonald, William R. Letendre, Matthew Aubrey, John Kelly, Darrell Herrick, Robert A. Hasenbein
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Patent number: 8579397Abstract: Among other things, for ink jetting, a system includes a printhead including at least 25 jets and an imaging device to capture image information for all of the jets simultaneously, the captured image information being useful in analyzing a performance of each of the jets.Type: GrantFiled: September 5, 2008Date of Patent: November 12, 2013Assignee: FUJIFILM Dimatix, Inc.Inventors: Steven H. Barss, William R. Letendre, Jr., Paul A. Hoisington
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Publication number: 20130229473Abstract: An apparatus includes an inkjet assembly having inkjet nozzles through each of which ink flows at a nominal flow rate as it is ejected from the nozzle onto a substrate. Ink is held under a nominal negative pressure associated with a characteristic of a meniscus of the ink in the nozzle when ejection of ink from the nozzle is not occurring. The apparatus includes recirculation flow paths, each flow path having a nozzle end at which it opens into one of the nozzles and another location spaced from the nozzle end that is to be subjected to a recirculation pressure lower than the nominal negative pressure so that ink is recirculated from the nozzle through the flow path at a recirculation flow rate.Type: ApplicationFiled: March 5, 2013Publication date: September 5, 2013Applicant: FUJIFILM DIMATIX, INC.Inventors: Robert L. Wells, JR., Bailey Smith, Marlene McDonald, William R. Letendre, Matthew Aubrey, John Kelly, Darrell Herrick, Robert A. Hasenbein
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Patent number: 8480196Abstract: Described herein is a method and apparatus for driving a drop ejection device to produce drops having straight trajectories. In one embodiment, a method for driving a drop ejection device having an actuator includes building a drop of a fluid with at least one drive pulse by applying a multi-pulse waveform having the at least one drive pulse and a straightening pulse to the actuator. Next, the method includes causing the drop ejection device to eject the drop with a straight trajectory in response to the pulses of the multi-pulse waveform. The straightening pulse is designed to ensure that the drop is ejected without a drop trajectory error.Type: GrantFiled: October 23, 2009Date of Patent: July 9, 2013Assignee: FujiFilm Dimatix, Inc.Inventors: William R. Letendre, Jr., Xi Wang, Robert Hasenbein, Marlene McDonald, Jaan Laaspere
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Patent number: 8317284Abstract: Described herein is a method and apparatus for driving a droplet ejection device with multi-pulse waveforms. In one embodiment, a method for driving a droplet ejection device having an actuator includes applying a multi-pulse waveform having two or more drive pulses and a cancellation pulse to the actuator. The method further includes generating a pressure response wave in a pumping chamber in response to each pulse. The method further includes causing the droplet ejection device to eject a droplet of a fluid in response to the drive pulses of the multi-pulse waveform. The method further includes canceling the pressure response waves associated with the drive pulses with the pressure response wave associated with the cancellation pulse.Type: GrantFiled: April 17, 2009Date of Patent: November 27, 2012Assignee: Fujifilm Dimatix, Inc.Inventors: William R. Letendre, Jr., Robert Hasenbein
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Publication number: 20110096114Abstract: Described herein is a method and apparatus for driving a drop ejection device to produce drops having straight trajectories. In one embodiment, a method for driving a drop ejection device having an actuator includes building a drop of a fluid with at least one drive pulse by applying a multi-pulse waveform having the at least one drive pulse and a straightening pulse to the actuator. Next, the method includes causing the drop ejection device to eject the drop with a straight trajectory in response to the pulses of the multi-pulse waveform. The straightening pulse is designed to ensure that the drop is ejected without a drop trajectory error.Type: ApplicationFiled: October 23, 2009Publication date: April 28, 2011Inventors: William R. Letendre, JR., Xi Wang, Robert Hasenbein, Marlene McDonald, Jaan Laaspere
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Publication number: 20100141709Abstract: A nozzle layer is described that has a semiconductor body having a first surface, a second surface opposing the first surface, and a nozzle formed through the body connecting the first and second surfaces, wherein the nozzle is configured to eject fluid through a nozzle outlet on the second surface, and the outlet having straight sides connected by curved corners.Type: ApplicationFiled: October 26, 2009Publication date: June 10, 2010Inventors: Gregory DeBrabander, Deane A. Gardner, Thomas G. Duby, Marlene McDonald, William R. Letendre, Christoph Menzel
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Publication number: 20100060684Abstract: Among other things, for ink jetting, a system includes a printhead including at least 25 jets and an imaging device to capture image information for all of the jets simultaneously, the captured image information being useful in analyzing a performance of each of the jets.Type: ApplicationFiled: September 5, 2008Publication date: March 11, 2010Inventors: Steven H. Barss, William R. Letendre, JR., Paul A. Hoisington
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Publication number: 20090289983Abstract: Described herein is a method and apparatus for driving a droplet ejection device with multi-pulse waveforms. In one embodiment, a method for driving a droplet ejection device having an actuator includes applying a multi-pulse waveform having two or more drive pulses and a cancellation pulse to the actuator. The method further includes generating a pressure response wave in a pumping chamber in response to each pulse. The method further includes causing the droplet ejection device to eject a droplet of a fluid in response to the drive pulses of the multi-pulse waveform. The method further includes canceling the pressure response waves associated with the drive pulses with the pressure response wave associated with the cancellation pulse.Type: ApplicationFiled: April 17, 2009Publication date: November 26, 2009Inventors: William R. Letendre, JR., Robert Hasenbein