Patents by Inventor Henricus W. C. Douven

Henricus W. C. Douven 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).

  • Method and apparatus for detecting a media touch of an inkjet printhead
    Patent number: 8579405
    Abstract: In a printer having a print head moveable relative to a recording medium, the recording medium and print head may touch each other, thereby possibly damaging the print head and/or the recording medium. In order to prevent further damage, it is advantageous to detect a medium touch as soon as possible. An available feedback signal relating to the print head, e.g. originating from a carriage on which the print head is mounted, is employed to determine whether a medium touch has occurred such that a dedicated medium touch or crash sensor may be omitted. A malfunctioning nozzle signal is used to determine a change in a number of malfunctioning nozzles to detect a medium touch. Alternatively, a print head position signal is used to determine a position error and derive from the position error whether or not a medium touch has occurred.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: November 12, 2013
    Assignee: OCE-Technologies B.V.
    Inventors: Johannes H. Huyghen, Franciscus J. W. M. Wolters, Stefan A. C. J. Winteraeken, Henricus W. C. Douven, Mike P. Van Eekhout, Hubertus M. J. M. Boesten
  • Printer with a movable carriage
    Patent number: 7815283
    Abstract: A printer comprising a carriage, a guide rail and a print surface, the carriage being movable along the guide rail and carrying a printhead that faces the print surface and is movable in a direction normal to the plane of the print surface, wherein a stop or brake mechanism responsive to a movement of the printhead in said direction normal to the plane of the print surface is provided and adapted to stop the movement of the carriage.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: October 19, 2010
    Assignee: Oce-Technologies, B.V.
    Inventors: Cornelis H. J. Slaats, Barry B. Goeree, Henricus W. C. Douven, Jeroen A. A. Van Assen
  • METHOD AND APPARATUS FOR DETECTING A MEDIA TOUCH OF AN INKJET PRINTHEAD
    Publication number: 20090225119
    Abstract: In a printer having a print head moveable relative to a recording medium, the recording medium and print head may touch each other, thereby possibly damaging the print head and/or the recording medium. In order to prevent further damage, it is advantageous to detect a medium touch as soon as possible. An available feedback signal relating to the print head, e.g. originating from a carriage on which the print head is mounted, is employed to determine whether a medium touch has occurred such that a dedicated medium touch or crash sensor may be omitted. A malfunctioning nozzle signal is used to determine a change in a number of malfunctioning nozzles to detect a medium touch. Alternatively, a print head position signal is used to determine a position error and derive from the position error whether or not a medium touch has occurred.
    Type: Application
    Filed: March 9, 2009
    Publication date: September 10, 2009
    Applicant: OCE-TECHNOLOGIES B.V.
    Inventors: Johannes H. HUYGHEN, Franciscus J.W.M. WOLTERS, Stefan A.C.J. WINTERAEKEN, Henricus W. C. DOUVEN, Mike P. VAN EEKHOUT, Hubertus M.J.M BOESTEN
  • Multicolor ink jet printing method and printer
    Patent number: 7029096
    Abstract: A multicolor ink jet printing method which includes the steps of moving a carriage is moved relative to a recording medium in a main scanning direction and a subscanning direction orthogonal to the main scanning direction, printing each color with a different group of nozzle heads mounted on the carriage, wherein at least one color is printed with a larger number of nozzle heads than the other colors, and printing the at least one color with a larger printing resolution in the main scanning direction than the other colors.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: April 18, 2006
    Assignee: Oce-Technologies B.V.
    Inventors: Clemens T. Weijkamp, Franciscus J. H. M. Van Den Beucken, Henricus W. C. Douven
  • Multicolor ink jet printing method and printer
    Publication number: 20040160478
    Abstract: A multicolor ink jet printing method which includes the steps of moving a carriage is moved relative to a recording medium in a main scanning direction and a subscanning direction orthogonal to the main scanning direction, printing each color with a different group of nozzle heads mounted on the carriage, wherein at least one color is printed with a larger number of nozzle heads than the other colors, and printing the at least one color with a larger printing resolution in the main scanning direction than the other colors.
    Type: Application
    Filed: October 8, 2003
    Publication date: August 19, 2004
    Inventors: Clemens T. Weijkamp, Franciscus J.H.M. Van Den Beucken, Henricus W.C. Douven