Patents by Inventor Jeffrey D. Langford

Jeffrey D. Langford 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: 8282203
    Abstract: One method of ink formulation may include providing a shipping material in a reservoir of a printing mechanism, placing a concentrated ink in communication with the reservoir, and mixing the shipping material and the concentrated ink together to create a print-ready ink.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: October 9, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: James M Brenner, Harold F Mantooth, Jeffrey D Langford
  • Patent number: 8002395
    Abstract: An ink recirculation system includes a printhead adapted for printing an ink image on a media, a printhead reservoir fluidly connected to the printhead, a pump, a valve fluidly connected to the pump and the printhead reservoir, and an ink supply container including cleaning fluid therein. The ink supply container is fluidly connected to the pump.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: August 23, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Carrie E. Harris
  • Patent number: 7997698
    Abstract: An ink delivery system having at least one off-axis ink supply container and an on-axis printhead assembly. The on-axis printhead assembly includes at least one reservoir and a corresponding standpipe separated by a particle filter. At least one tube connects the off-axis ink supply container to the on-axis printhead assembly. A first valve is configured to selectively open a flow path between the tube and the reservoir. A second valve is configured to selectively open a flow path between the standpipe and the tube.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: August 16, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeremy A Davis, Melissa S. Gedraitis, Marc A. Baldwin, Louis Barinaga, Daniel D Dowell, Ashley E Childs, Mark A. Smith, Charles R. Steinmetz, Ralph L. Stathem, Jeffrey D. Langford, Michael L. Hilton
  • Publication number: 20110168052
    Abstract: One method of ink formulation may include providing a shipping material in a reservoir of a printing mechanism, placing a concentrated ink in communication with the reservoir, and mixing the shipping material and the concentrated ink together to create a print-ready ink.
    Type: Application
    Filed: March 25, 2011
    Publication date: July 14, 2011
    Inventors: James M. BRENNER, Harold F. Mantooth, Jeffrey D. Langford
  • Patent number: 7922314
    Abstract: One method of ink formulation may include providing a shipping material in a reservoir of a printing mechanism, placing a concentrated ink in communication with the reservoir, and mixing the shipping material and the concentrated ink together to create a print-ready ink.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: April 12, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: James M Brenner, Harold F Mantooth, Jeffrey D Langford
  • Patent number: 7628475
    Abstract: In one embodiment, a printhead assembly includes: an ink reservoir; a printhead; a passage for carrying ink from the ink reservoir to the printhead; and a port from the passage to a source of air pressure. The port is operable between a closed position in which the passage is not pressurized with air and an open position in which the passage is exposed to pressurized air. In another embodiment, an ink supply includes: a reservoir for holding ink; a printhead; a standpipe connecting the reservoir and the printhead such that ink may flow from the reservoir to the printhead through the standpipe; and a valve operatively connected to the standpipe. The valve is operative between a first position in which the standpipe is pressurized with air and a second position in which of the standpipe is not pressurized with air.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: December 8, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Ross E Friesen, Carrie E. Harris, Harold F Mantooth, Donald L. Michael
  • Patent number: 7556367
    Abstract: An ink delivery system having a fluid supply and a printhead assembly, separate from and in fluid communication with the fluid supply. A primary flow path is configured to facilitate the delivery of fluid from the fluid supply to the printhead assembly, and a return flow path, at least partially separate from the primary flow path, is configured to facilitate the evacuation of fluid from the printhead assembly.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: July 7, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Harold F Mantooth, Carrie E Harris
  • Patent number: 7543908
    Abstract: Systems, methodologies, media, and other embodiments associated with clearing silicate based kogation from heating resistors employed in ink jet printing are described. One exemplary system embodiment includes a silicate kogation clearing logic configured to pulse the heating resistor at a high frequency and low pulse width to heat the resistor surface to a temperature below that required to form an ink bubble and thus below that required to eject a drop of ink. Heating the resistor facilitates breaking bonds between the silicate based kogation and the heating resistor.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: June 9, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Morgan G. Jones, Satya Prakash, Jeffrey D. Langford
  • Patent number: 7510274
    Abstract: An ink delivery system having at least one off-axis ink supply container and an on-axis printhead assembly. The printhead assembly includes at least one reservoir and a corresponding standpipe separated by a particle filter. At least one tube connects the off-axis ink supply container to the printhead assembly. A first valve is configured to selectively open a flow path between the tube and the reservoir. A second valve is configured to selectively open a flow path between the standpipe and the tube.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: March 31, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeremy A Davis, Melissa S. Gedraitis, Marc A. Baldwin, Louis Barinaga, Daniel D Dowell, Ashley E Childs, Mark A. Smith, Charles R. Steinmetz, Ralph L. Stathem, Jeffrey D. Langford, Michael L. Hilton
  • Publication number: 20090058956
    Abstract: An ink delivery system having at least one off-axis ink supply container and an on-axis printhead assembly. The printhead assembly includes at least one reservoir and a corresponding standpipe separated by a particle filter. At least one tube connects the off-axis ink supply container to the printhead assembly. A first valve is configured to selectively open a flow path between the tube and the reservoir. A second valve is configured to selectively open a flow path between the standpipe and the tube. A method for controlling effects of accumulated air in a printhead assembly. The printhead assembly has at least one ink reservoir and one standpipe separated by a particle filter. The printhead assembly is fluidicly connected to at least one off-axis ink supply container by at least one tube. The method includes drawing air from said printhead assembly through said standpipe into the tube.
    Type: Application
    Filed: October 30, 2008
    Publication date: March 5, 2009
    Inventors: JEREMY A. DAVIS, Melissa S. Gedraitis, Marc A. Baldwin, Louis Barinaga, Daniel D. Dowell, Ashley E. Childs, Mark A. Smith, Charles R. Steinmetz, Ralph L. Stathem, Jeffrey D. Langford, Michael L. Hitton
  • Publication number: 20090051742
    Abstract: An ink delivery system having at least one off-axis ink supply container and an on-axis printhead assembly. The printhead assembly includes at least one reservoir and a corresponding standpipe separated by a particle filter. At least one tube connects the off-axis ink supply container to the printhead assembly. A first valve is configured to selectively open a flow path between the tube and the reservoir. A second valve is configured to selectively open a flow path between the standpipe and the tube. A method for controlling effects of accumulated air in a printhead assembly. The printhead assembly has at least one ink reservoir and one standpipe separated by a particle filter. The printhead assembly is fluidicly connected to at least one off-axis ink supply container by at least one tube. The method includes drawing air from said printhead assembly through said standpipe into the tube.
    Type: Application
    Filed: October 30, 2008
    Publication date: February 26, 2009
    Inventors: JEREMY A. DAVIS, Melissa S. Gedraitis, Marc A. Baldwin, Louis Barinaga, Daniel D. Dowell, Ashley E. Childs, Mark A. Smith, Charles R. Steinmetz, Ralph L. Stathem, Jeffrey D. Langford, Michael L. Hilton
  • Publication number: 20080273069
    Abstract: One embodiment of a method of storing a printhead includes opening a valve to a vent of an ink reservoir, operating a pump in a first direction to pull ink from the ink reservoir through said valve, and pumping the ink pulled from the ink reservoir to an ink supply container.
    Type: Application
    Filed: July 14, 2008
    Publication date: November 6, 2008
    Inventors: Jeffrey D. Langford, Donald L. Michael, Kris M. English, Carrie E. Harris
  • Publication number: 20080252706
    Abstract: An ink delivery system having a fluid supply and a printhead assembly, separate from and in fluid communication with the fluid supply. A primary flow path is configured to facilitate the delivery of fluid from the fluid supply to the printhead assembly, and a return flow path, at least partially separate from the primary flow path, is configured to facilitate the evacuation of fluid from the printhead assembly.
    Type: Application
    Filed: December 20, 2007
    Publication date: October 16, 2008
    Inventors: Jeffrey D. Langford, Harold F. Mantooth, Carrie E. Harris
  • Patent number: 7416293
    Abstract: One embodiment of a method of storing a printhead includes opening a valve to a vent of an ink reservoir, operating a pump in a first direction to pull ink from the ink reservoir through said valve, and pumping the ink pulled from the ink reservoir to an ink supply container.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: August 26, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Donald L Michael, Kris M. English, Carrie E Harris
  • Patent number: 7331664
    Abstract: An ink delivery system having a fluid supply and a printhead assembly, separate from and in fluid communication with the fluid supply. A primary flow path is configured to facilitate the delivery of fluid from the fluid supply to the printhead assembly, and a return flow path, at least partially separate from the primary flow path, is configured to facilitate the evacuation of fluid from the printhead assembly.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: February 19, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Harold F Mantooth, Carrie E Harris
  • Patent number: 7296881
    Abstract: A valve mechanism and a method for preparing an inkjet print cartridge and printer for inactivity is herein disclosed. Pressurized fluid is introduced to a standpipe volume to create a pressure differential that forces ink within the standpipe into an ink reservoir.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: November 20, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Ross E Friesen, Carrie E. Harris, Harold F Mantooth, Donald L Michael
  • Patent number: 7237879
    Abstract: An inkjet printhead and a method for increasing the shelf life thereof are herein disclosed. The inkjet printhead has one or more nozzles for dispensing a colorant. These nozzles are fluidically connected to a reservoir. A first colorant substantially fills the nozzles while a second colorant is reserved in the reservoir.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: July 3, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey D Langford, Donald L. Michael, Harold F Mantooth
  • Patent number: 6655794
    Abstract: Methods and apparatus are provided for forming a seal between two or more components using a thermally cured sealing material. One exemplary method includes selectively applying an electrical signal to a heating trace on a first component, applying a sealing material between at least a portion of the first component and at least a portion of a second component, and at least partially thermally curing the sealing material using thermal energy generated by the application of the electrical signal to the heating trace.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: December 2, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Mark R. Natterer, Jeffrey D. Langford, Leo Clarke, Jr.
  • Publication number: 20030142182
    Abstract: Methods and apparatus are provided for forming a seal between two or more components using a thermally cured sealing material. One exemplary method includes selectively applying an electrical signal to a heating trace on a first component, applying a sealing material between at least a portion of the first component and at least a portion of a second component, and at least partially thermally curing the sealing material using thermal energy generated by the application of the electrical signal to the heating trace.
    Type: Application
    Filed: January 31, 2002
    Publication date: July 31, 2003
    Inventors: Mark R. Natterer, Jeffrey D. Langford, Leo Clarke
  • Publication number: 20030076391
    Abstract: Embodiments of the present invention comprise apparatus and methods for modifying existing low cost “on-axis” ink jet printer systems to accommodate low intervention rate “free ink” ink supplies. Embodiments are disclosed which enable reduced intervention rates and visual ink level indication by providing a large ink container, flexible interconnect tubing, and a modified ink supply container which mounts to the printer carriage.
    Type: Application
    Filed: October 24, 2001
    Publication date: April 24, 2003
    Inventors: John F. Wilson, Jeffrey D. Langford