Patents by Inventor Jeffrey Zampell

Jeffrey Zampell 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).

  • Developer unit seals with fluid channels
    Patent number: 11934114
    Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The seal includes a first sealing member to contact an end cap of the developer unit. The first sealing member has ports to align with rollers that are to protrude into the end cap. The seal includes a second sealing member to contact the first sealing member. The second sealing member has ports to align with the rollers. Channels are disposed between the first sealing member and the second sealing member to direct print fluid to each of the ports.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: March 19, 2024
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey Zampell, John W. Godden
  • DEVELOPER ROLLER
    Publication number: 20230400790
    Abstract: Disclosed is a developer roller comprising a first section comprising a first exterior surface, wherein the first exterior surface comprises an electrically-conductive material; and a second section comprising a second exterior surface, wherein the second exterior surface is non-electrically-conductive. The second section is axially aligned with the first section and provided at a first longitudinal end of the first section.
    Type: Application
    Filed: October 16, 2020
    Publication date: December 14, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey ZAMPELL, Daniel C. TANCHANGCO, Jingzhi LU
  • DEVELOPER UNIT SEALS WITH ENDCAPS HAVING CHANNELS
    Publication number: 20230094249
    Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The developer unit seal includes an endcap. The endcap has an opening to receive a dynamic seal for a roller, an inlet to receive print fluid, and a channel embedded in a surface of the endcap. The channel connects the inlet with the opening to direct print fluid to the opening. The developer unit seal also includes a sealing member to cover the channel.
    Type: Application
    Filed: April 8, 2020
    Publication date: March 30, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey Zampell, John W. Godden
  • DEVELOPER UNIT SEALS WITH FLUID CHANNELS
    Publication number: 20220283527
    Abstract: In one example in accordance with the present disclosure, a developer unit seal is described. The seal includes a first sealing member to contact an end cap of the developer unit. The first sealing member has ports to align with rollers that are to protrude into the end cap. The seal includes a second sealing member to contact the first sealing member. The second sealing member has ports to align with the rollers. Channels are disposed between the first sealing member and the second sealing member to direct print fluid to each of the ports.
    Type: Application
    Filed: October 8, 2019
    Publication date: September 8, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey Zampell, John W. Godden
  • Inhibiting ink flow streaks
    Patent number: 11016420
    Abstract: A technique includes rotating a squeegee roller to regulate a film thickness of ink on a developer roller; and using the developer roller to transfer a portion of the ink from the developer roller to a photoconductive member. The technique includes creating, by an electrode, a potential bias with the developer roller to transfer the ink to the developer roller; and inhibiting flow streaks on the developer roller, where inhibiting the flow streaks includes restricting a flow of ink between the squeegee roller and the electrode.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: May 25, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Sabo, Blair A. Butler, Jeffrey Zampell, Avinoam Halpern, Sarah Ann Russell
  • INHIBITING INK FLOW STREAKS
    Publication number: 20200301316
    Abstract: A technique includes rotating a squeegee roller to regulate a film thickness of ink on a developer roller; and using the developer roller to transfer a portion of the ink from the developer roller to a photoconductive member. The technique includes creating, by an electrode, a potential bias with the developer roller to transfer the ink to the developer roller; and inhibiting flow streaks on the developer roller, where inhibiting the flow streaks includes restricting a flow of ink between the squeegee roller and the electrode.
    Type: Application
    Filed: December 15, 2017
    Publication date: September 24, 2020
    Inventors: David Sabo, Blair A. Butler, Jeffrey Zampell, Avinoam Halpern, Sarah Ann Russell