Patents by Inventor Ronald Herman Schippers

Ronald Herman Schippers 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 of controlling an inkjet printhead, an inkjet printhead suitable for use of said method, and an inkjet printer comprising said printhead
    Patent number: 7357474
    Abstract: A method of controlling an inkjet printhead containing a substantially closed duct in which ink is situated, said duct having at least one exit opening for the ink, wherein an actuation pulse is applied to an electro-mechanical transducer so that the pressure in the duct changes in such a manner than an ink drop is ejected from the exit opening, wherein the method further comprises: measuring the electric impedance of the electromechanical transducer and adapting the actuation pulse on the basis of the measured impedance.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: April 15, 2008
    Assignee: Océ-Technologies B.V.
    Inventors: Mark Alexander Gröninger, Pieter Gijsbertus Maria Kruijt, Hans Reinten, Ronald Herman Schippers, Johannes Mathieu Marie Simons
  • Inkjet printhead, a method of controlling an inkjet printhead, and an inkjet printer provided with such a printhead
    Patent number: 6926388
    Abstract: A method of controlling an inkjet printhead with a substantially closed duct in which ink is disposed, which duct has an exit opening for the ink, the method including the actuation of an electromechanical transducer so that the pressure the duct changes in such a manner that an ink drop is ejected from the exit opening, said pressure causing a deformation of the transducer, whereby after the end of the actuation, an electric signal generated by the transducer is measured as a result of the deformation, wherein a subsequent actuation of the transducer is adapted to the measured signal.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: August 9, 2005
    Assignee: Océ-Technologies B.V.
    Inventors: Mark Alexander Gröninger, Pieter Gijsbertus Maria Kruijt, Hans Reinten, Ronald Herman Schippers, Johannes Mathieu Marie Simons
  • Method of controlling an inkjet printer, and inkjet printhead suitable for the use of this method, and an inkjet printer provided with this printhead
    Patent number: 6910751
    Abstract: A method of controlling an inkjet printer containing at least two substantially closed ducts in which ink is present, which includes actuating an electro-mechanical transducer whereby the pressure in a first duct is increased, and a pressure change in another duct is also generated by said actuation, whereby an electro-mechanical transducer is deformed as a result of the pressure change, said electrical transducer generating an electrical signal, and measuring the electric signal.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: June 28, 2005
    Assignees: Kumiai Chemical Industry Co., Ltd., National Institute of Agrobiological Sciences
    Inventors: Mark Alexander Gröninger, Pieter Gijsbertus Maria Kruijt, Hans Reinten, Ronald Herman Schippers, Johannes Mathieu Marie Simons
  • Method of controlling an inkjet printer, an inkjet printhead suitable for the use of this method, and an inkjet printer provided with this printhead
    Publication number: 20040125158
    Abstract: A method of controlling an inkjet printer containing at least two substantially closed ducts in which ink is present, which includes actuating an electro-mechanical transducer whereby the pressure in a first duct is increased, and a pressure change in another duct is also generated by said actuation, whereby an electro-mechanical transducer is deformed as a result of the pressure change, said electrical transducer generating an electrical signal, and measuring the electric signal.
    Type: Application
    Filed: July 3, 2003
    Publication date: July 1, 2004
    Inventors: Mark Alexander Groninger, Pieter Gijsbertus Maria Kruijt, Hans Reinten, Ronald Herman Schippers, Johannes Mathieu Marie Simons
  • Method of controlling an inkjet printhead, an inkjet printhead suitable for use of said method, and an inkjet printer comprising said printhead
    Publication number: 20040051750
    Abstract: A method of controlling an inkjet printhead containing a substantially closed duct in which ink is situated, said duct having at least one exit opening for the ink, wherein an actuation pulse is applied to an electro-mechanical transducer so that the pressure in the duct changes in such a manner than an ink drop is ejected from the exit opening, wherein the method further comprises: measuring the electric impedance of the electromechanical transducer and adapting the actuation pulse on the basis of the measured impedance.
    Type: Application
    Filed: July 3, 2003
    Publication date: March 18, 2004
    Inventors: Mark Alexander Groninger, Pieter Gijsbertus Maria Kruijt, Hans Reinten, Ronald Herman Schippers, Johannes Mathieu Marie Simons
  • Inkjet printhead, a method of controlling an inkjet printhead, and an inkjet printer provided with such a printhead
    Publication number: 20040017412
    Abstract: A method of controlling an inkjet printhead with a substantially closed duct in which ink is disposed, which duct has an exit opening for the ink, the method including the actuation of an electromechanical transducer so that the pressure the duct changes in such a manner that an ink drop is ejected from the exit opening, said pressure causing a deformation of the transducer, whereby after the actuation, an electric signal generated by the transducer is measured as a result of the deformation, wherein a subsequent actuation of the transducer is adapted to the measured goal.
    Type: Application
    Filed: July 3, 2003
    Publication date: January 29, 2004
    Inventors: Mark Alexander Groninger, Pieter Gijsbertus Maria Kruijt, Hans Reinten, Ronald Herman Schippers, Johannes Mathieu Marie Simons