Patents by Inventor Erik D. Tomiainen

Erik D. Tomiainen 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).

  • Noncircular inkjet nozzle
    Patent number: 10112393
    Abstract: An inkjet nozzle includes an aperture with a noncircular opening substantially defined by a polynomial equation. A droplet generator is also described which includes a firing chamber fluidically coupled to a fluid reservoir, a heating resistor and a nozzle. The nozzle includes an aperture forming a passage from the firing chamber to the exterior of the droplet generator through a top hat layer. The nozzle is defined by a closed polynomial and has a mathematically smooth and mathematically continuous shape around aperture's perimeter wall, with two protrusions extending into the center of the aperture.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: October 30, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: James A. Feinn, Albert Nagao, Thomas R. Strand, David R. Thomas, Erik D. Tomiainen, Lawrence H. White
  • NONCIRCULAR INKJET NOZZLE
    Publication number: 20130187984
    Abstract: An inkjet nozzle includes an aperture with a noncircular opening having a first segment substantially defined by a first polynomial equation and a second segment substantially defined by a second equation.
    Type: Application
    Filed: January 20, 2011
    Publication date: July 25, 2013
    Inventors: James A. Feinn, David P. Markel, Alberto Nagao, Thomas R. Strand, Paul A. Richards, Lawrence H. White, Erik D. Tomiainen
  • NONCIRCULAR INKJET NOZZLE
    Publication number: 20130021411
    Abstract: An inkjet nozzle includes an aperture with a noncircular opening substantially defined by a polynomial equation. A droplet generator is also described which includes a firing chamber fluidically coupled to a fluid reservoir, a heating resistor and a nozzle. The nozzle includes an aperture forming a passage from the firing chamber to the exterior of the droplet generator through a top hat layer. The nozzle is defined by a closed polynomial and has a mathematically smooth and mathematically continuous shape around aperture's perimeter wall, with two protrusions extending into the center of the aperture.
    Type: Application
    Filed: March 31, 2010
    Publication date: January 24, 2013
    Inventors: James A. Feinn, Albert Nagao, Thomas R. Strand, David R. Thomas, Erik D. Tomiainen, Lawrence H. White