Patents by Inventor Petrus L.J. Welten

Petrus L.J. Welten 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).

  • Publication number: 20020067389
    Abstract: For the formation of colored pixels on a substrate, a print head can be used which performs a forward and return movement in relation to the substrate and which has a number of ink nozzles, in which the different ink nozzles can produce ink droplets of different colors. A print head which, in the direction of the first movement, comprises at least two parallel rows of at least two ink nozzles can be used. Preceding the printing step the printing method comprises the step of entailing the allocation in each case of two neighboring colors in a color space to ink nozzles of different rows, and black either to one or more ink nozzles of a separate row or to the first ink nozzle and last ink nozzle of the same row.
    Type: Application
    Filed: January 11, 2002
    Publication date: June 6, 2002
    Inventors: Robert E.A. Braun, Petrus L.J. Welten, Jan J. Boomgaardt, Fulgencio Arjona-Gomez
  • Publication number: 20020060718
    Abstract: In a method for the formation with a print head on a substrate of pixels with a predefined pixel colour by means of droplet deposition, a print head is used which is set up so that, during operation, it performs in one pass a forward and return movement in relation to the substrate. The print head comprises ink nozzles which are aligned in a row behind one another in the direction of movement of the print head, which row comprises an initial series and a final series of ink nozzles, for at least two different first colours, and also a middle series of ink nozzles for at least two different additional colours, which additional colours cannot be formed from the first colours. The method comprises the steps of printing a pixel with a predefined pixel colour by the successive deposition of ink droplets of colours from the row of ink nozzles, in which black is composed as the first and/or the last colour with the aid of ink droplets of the first colours from the ink nozzles.
    Type: Application
    Filed: January 11, 2002
    Publication date: May 23, 2002
    Inventors: Petrus L.J. Welten, Robert E.A. Braun, Fulgencio Arjona-Gomez