Patents by Inventor Hendrik Willem Ellenkamp

Hendrik Willem Ellenkamp 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).

  • Inkjet printhead
    Patent number: 6874869
    Abstract: An ink jet printhead comprising a channel plate having a plurality of ink channels etched into at least one surface thereof, actuators respectively associated with each of the ink channels for pressurizing ink contained in the ink channels, and means defining an ink reservoir communicating with the ink channels, wherein said ink reservoir is defined by a base member made of a material different from that of the channel plate.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: April 5, 2005
    Assignee: Océ-Technologies B.B.
    Inventors: Peter Joseph Hollands, Hendrik Willem Ellenkamp
  • Method and apparatus for forming a nozzle in an element for an ink jet print head
    Patent number: 6717103
    Abstract: A method of forming a nozzle element for an ink jet print head, wherein material is removed from the nozzle element by means of a laser to form the nozzle. A mask is irradiated with a laser beam in such manner that at least one sub-beam is passed through the mask, whereafter the material is removed by means of the sub-beam. Inhomogeneity of the laser beam is compensated for by using, for each nozzle laser, radiation originating from different parts of the laser beam, whereby the nozzle is formed with an “average” laser beam.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: April 6, 2004
    Assignee: OCE-Technologies B.V.
    Inventor: Hendrik Willem Ellenkamp
  • Method and apparatus for forming a nozzle in an element for an ink jet print head
    Publication number: 20030136771
    Abstract: A method of forming a nozzle element for an ink jet print head, wherein material is removed from the nozzle element by means of a laser to form the nozzle. A mask is irradiated with a laser beam in such manner that at least one sub-beam is passed through the mask, whereafter the material is removed by means of the sub-beam. Inhomogeneity of the laser beam is compensated for by using, for each nozzle laser, radiation originating from different parts of the laser beam, whereby the nozzle is formed with an “average” laser beam.
    Type: Application
    Filed: January 31, 2003
    Publication date: July 24, 2003
    Applicant: OCE-TECHNOLOGIES B.V.
    Inventor: Hendrik Willem Ellenkamp
  • Method and apparatus for forming a nozzle in an element for an ink jet print head
    Publication number: 20020074321
    Abstract: A method of forming a nozzle in a nozzle element for an ink jet print head, wherein material is removed from the nozzle element by means of a laser to form the nozzle. A mask is irradiated with a laser beam in such manner that at least one sub-beam is passed through the mask, whereafter the material is removed by means of the sub-beam. Inhomogeneity of the laser beam is compensated for by using, for each nozzle laser, radiation originating from different parts of the laser beam, whereby the nozzle is formed with an “average” laser beam.
    Type: Application
    Filed: November 28, 2001
    Publication date: June 20, 2002
    Inventor: Hendrik Willem Ellenkamp