Patents by Inventor Sarah Vella

Sarah Vella 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).

  • Patent number: 11968900
    Abstract: An apparatus 10 for poling piezoelectric material includes a platen 22 which holds a sample 20 of piezoelectric material to be poled and a stage 30 to which the platen is mounted. The stage 30 is arranged to selectively move the platen 22 and thereby the sample 20 which the platen 22 holds. The platen 22 is movable by the stage 30 selectively between a first position and a second position. A corona source 40 generates a corona to which the sample 20 is exposed when the platen 22 is moved to the first position by the stage 30. An electrostatic voltmeter 60 having a probe 62 measures a surface potential of the sample 20 when the platen 22 is moved to the second position by the stage 30.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: April 23, 2024
    Assignee: XEROX CORPORATION
    Inventors: Johann Junginger, Simon Burke, Sarah Vella
  • Publication number: 20220173304
    Abstract: An apparatus 10 for poling piezoelectric material includes a platen 22 which holds a sample 20 of piezoelectric material to be poled and a stage 30 to which the platen is mounted. The stage 30 is arranged to selectively move the platen 22 and thereby the sample 20 which the platen 22 holds. The platen 22 is movable by the stage 30 selectively between a first position and a second position. A corona source 40 generates a corona to which the sample 20 is exposed when the platen 22 is moved to the first position by the stage 30. An electrostatic voltmeter 60 having a probe 62 measures a surface potential of the sample 20 when the platen 22 is moved to the second position by the stage 30.
    Type: Application
    Filed: December 2, 2020
    Publication date: June 2, 2022
    Applicant: Xerox Corporation
    Inventors: Johann Junginger, Simon Burke, Sarah Vella
  • Publication number: 20170131676
    Abstract: Methods for lubricating an imaging member include applying lubricant-containing capsules to the surface of the imaging member via a non-contact applicator. The capsules are applied upstream of a cleaning blade after image transfer to another substrate, such that the cleaning blade ruptures the capsules, thereby releasing the lubricant contained therein.
    Type: Application
    Filed: January 19, 2017
    Publication date: May 11, 2017
    Inventors: Yu Liu, Johann Junginger, Sarah Vella, Cuong Vong, Naveen Chopra, Nan-Xing Hu
  • Patent number: 9575458
    Abstract: Methods for lubricating an imaging member include applying lubricant-containing capsules to the surface of the imaging member via a non-contact applicator. The capsules are applied upstream of a cleaning blade after image transfer to another substrate, such that the cleaning blade ruptures the capsules, thereby releasing the lubricant contained therein.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: February 21, 2017
    Assignee: XEROX CORPORATION
    Inventors: Yu Liu, Johann Junginger, Sarah Vella, Cuong Vong, Naveen Chopra, Nan-Xing Hu
  • Patent number: 9480980
    Abstract: An apparatus produces chemical assay devices from a hydrophilic substrate, hydrophobic materials, and a chemical reagent. The apparatus includes a first print zone that forms hydrophobic material in a predetermined arrangement on the hydrophilic substrate, a structure formation unit configured to enable the first layer of the hydrophobic material to penetrate the hydrophilic substrate.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: November 1, 2016
    Assignee: Xerox Corporation
    Inventors: Jing Zhou, Mandakini Kanungo, Nancy Y. Jia, Yaorong Wang, Sarah Vella
  • Patent number: 9296203
    Abstract: An intermediate transfer member containing a blend of materials including a base polymer and a stimulus-responsive additive, an intermediate transfer member containing a first layer including a base polymer and a second layer grafted onto the first layer and including a stimulus-responsive additive, and a method of printing an image to a substrate.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: March 29, 2016
    Assignee: XEROX CORPORATION
    Inventors: Gabriel Iftime, Carolyn Moorlag, Sarah Vella, Barkev Keoshkerian, Michelle N. Chretien
  • Publication number: 20150367342
    Abstract: An apparatus produces chemical assay devices from a hydrophilic substrate, hydrophobic materials, and a chemical reagent. The apparatus includes a first print zone that forms hydrophobic material in a predetermined arrangement on the hydrophilic substrate, a structure formation unit configured to enable the first layer of the hydrophobic material to penetrate the hydrophilic substrate.
    Type: Application
    Filed: June 23, 2014
    Publication date: December 24, 2015
    Inventors: Jing Zhou, Mandakini Kanungo, Nancy Y. Jia, Yaorong Wang, Sarah Vella
  • Patent number: 9063509
    Abstract: An imaging apparatus includes an imaging member having a surface, a delivery member that is spaced apart from the imaging member, and a power source for generating an electric field between the imaging member surface and the delivery member. A functional material is electrohydrodynamically transferred from the delivery member to the imaging member surface when the electric field is generated.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: June 23, 2015
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Yu Qi, Vladislav Skorokhod, Johann Junginger, Sarah Vella, Nan-Xing Hu
  • Publication number: 20150132037
    Abstract: Methods for lubricating an imaging member include applying lubricant-containing capsules to the surface of the imaging member via a non-contact applicator. The capsules are applied upstream of a cleaning blade after image transfer to another substrate, such that the cleaning blade ruptures the capsules, thereby releasing the lubricant contained therein.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 14, 2015
    Applicant: Xerox Corporation
    Inventors: Yu Liu, Johann Junginger, Sarah Vella, Cuong Vong, Naveen Chopra, Nan-Xing Hu
  • Publication number: 20150085041
    Abstract: An intermediate transfer member containing a blend of materials including a base polymer and a stimulus-responsive additive, an intermediate transfer member containing a first layer including a base polymer and a second layer grafted onto the first layer and including a stimulus-responsive additive, and a method of printing an image to a substrate.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: XEROX CORPORATION
    Inventors: Gabriel IFTIME, Carolyn MOORLAG, Sarah VELLA, Barkev KEOSHKERIAN, Michelle N. CHRETIEN
  • Patent number: 8951708
    Abstract: The present embodiments relate to methods of making a toner composition. More specifically, the present embodiments relate to methods of including a functional material into a toner composition.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: February 10, 2015
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Cuong Vong, Sarah Vella, Gregory McGuire, Richard Klenkler, Nan-xing Hu, Paul Gerroir
  • Publication number: 20150016834
    Abstract: An imaging apparatus includes an imaging member having a surface, a delivery member that is spaced apart from the imaging member, and a power source for generating an electric field between the imaging member surface and the delivery member. A functional material is electrohydrodynamically transferred from the delivery member to the imaging member surface when the electric field is generated.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventors: Yu Liu, Yu Qi, Vladislav Skorokhod, Johann Junginger, Sarah Vella, Nan-Xing Hu
  • Patent number: 8913917
    Abstract: A vibration-assisted bias charge roll cleaning system includes a bias charge roll cleaning member connected to an actuator for causing the cleaning member to vibrate. The actuator is controlled to vibrate according to a predetermined pattern, and at desired frequencies at particular modes. The cleaning member is configured to be movable to a contact-cleaning position and a cleaning member cleaning position at which the cleaning member is separate from the charge roll.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: December 16, 2014
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Johann Junginger, Sarah Vella, Nan-xing Hu, Vlad Skorokhod, Greg McGuire
  • Publication number: 20140363761
    Abstract: The present embodiments relate to methods of making a toner composition. More specifically, the present embodiments relate to methods of including a functional material into a toner composition.
    Type: Application
    Filed: June 5, 2013
    Publication date: December 11, 2014
    Inventors: Yu Liu, Cuong Vong, Sarah Vella, Gregory McGuire, Richard Klenkler, Nan-xing Hu, Paul Gerroir
  • Publication number: 20140205312
    Abstract: A vibration-assisted bias charge roll cleaning system includes a bias charge roll cleaning member connected to an actuator for causing the cleaning member to vibrate. The actuator is controlled to vibrate according to a predetermined pattern, and at desired frequencies at particular modes. The cleaning member is configured to be movable to a contact-cleaning position and a cleaning member cleaning position at which the cleaning member is separate from the charge roll.
    Type: Application
    Filed: January 22, 2013
    Publication date: July 24, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yu LIU, Johann JUNGINGER, Sarah VELLA, Nan-xing HU, Vlad SKOROKHOD, Greg MCGUIRE
  • Publication number: 20060263580
    Abstract: A method of immobilizing a catalyst on a substrate surface involves providing novel ligating copolymers comprising functional groups capable of binding to a substrate surface and functional groups capable of ligating to catalysts such as metal ions, metal complexes, nanoparticles, or colloids; applying the ligating copolymer to a substrate surface to cause the ligating copolymer to bind thereto, and contacting the modified substrate surface with a solution of a catalyst, causing the catalyst to be ligated by the ligating copolymer and thus immobilized on the substrate surface. The ligating copolymer may be patterned on the substrate surface using a method such as microcontact printing.
    Type: Application
    Filed: May 22, 2006
    Publication date: November 23, 2006
    Inventors: Tricia Carmichael, Sarah Vella, Ali Afzali-Ardakani, Mahmoud Khojasteh