Patents by Inventor William R. Letendre, Jr.

William R. Letendre, Jr. 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).

  • Jet performance
    Patent number: 8579397
    Abstract: 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: Grant
    Filed: September 5, 2008
    Date of Patent: November 12, 2013
    Assignee: FUJIFILM Dimatix, Inc.
    Inventors: Steven H. Barss, William R. Letendre, Jr., Paul A. Hoisington
  • Method and apparatus to eject drops having straight trajectories
    Patent number: 8480196
    Abstract: 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: Grant
    Filed: October 23, 2009
    Date of Patent: July 9, 2013
    Assignee: FujiFilm Dimatix, Inc.
    Inventors: William R. Letendre, Jr., Xi Wang, Robert Hasenbein, Marlene McDonald, Jaan Laaspere
  • Method and apparatus to provide variable drop size ejection by dampening pressure inside a pumping chamber
    Patent number: 8317284
    Abstract: 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: Grant
    Filed: April 17, 2009
    Date of Patent: November 27, 2012
    Assignee: Fujifilm Dimatix, Inc.
    Inventors: William R. Letendre, Jr., Robert Hasenbein
  • METHOD AND APPARATUS TO EJECT DROPS HAVING STRAIGHT TRAJECTORIES
    Publication number: 20110096114
    Abstract: 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: Application
    Filed: October 23, 2009
    Publication date: April 28, 2011
    Inventors: William R. Letendre, JR., Xi Wang, Robert Hasenbein, Marlene McDonald, Jaan Laaspere
  • Jet performance
    Publication number: 20100060684
    Abstract: 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: Application
    Filed: September 5, 2008
    Publication date: March 11, 2010
    Inventors: Steven H. Barss, William R. Letendre, JR., Paul A. Hoisington
  • METHOD AND APPARATUS TO PROVIDE VARIABLE DROP SIZE EJECTION BY DAMPENING PRESSURE INSIDE A PUMPING CHAMBER
    Publication number: 20090289983
    Abstract: 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: Application
    Filed: April 17, 2009
    Publication date: November 26, 2009
    Inventors: William R. Letendre, JR., Robert Hasenbein