Patents by Inventor Andreas Wirtz

Andreas Wirtz 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).

  • Patent number: 8099030
    Abstract: In a system or method for development of potential images of images to be printed and generated on an intermediate image carrier using a developer fluid comprising charged toner particles and developer fluid in an electrographic printing or copying device, a feed device is provided comprising as function elements at least one chamber scraper, a raster element comprising cups to receiver the developer fluid, and at least one first flow element arranged in the chamber scraper. Between the at least one flow element and the raster element an electrical voltage is supplied such that a toner particle concentration in the cups of the raster element is increased. An application device accepts the developer fluid from the feed device and supplies it to the intermediate image carrier.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: January 17, 2012
    Assignee: Oce Printing Systems GmbH
    Inventors: Martin Berg, Volkhard Maess, Andreas Wirtz
  • Patent number: 7466935
    Abstract: In a method and system for transfer printing of an electrostatic recharge toner image from an intermediate carrier onto a recording medium and for fixing of the transfer-printed toner image onto the recording medium, the recording medium lying on an electrostatically-chargeable conveyor belt and adhered thereto by electrostatic forces is transported through a transfer printing region and subsequently along a guided transport section. The recording medium is conveyed to a fixing device. The guided transport section is arranged in a transport unit and the fixing device is arranged in a fixing unit which are independent of one another. The fixing unit has at least one wall designed to hinder a heat transfer from the fixing unit to the transport unit.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: December 16, 2008
    Assignee: Oce Printing Systems GmbH
    Inventors: Markus Stahuber, Andreas Wirtz
  • Publication number: 20080279597
    Abstract: In a system or method for development of potential images of images to be printed and generated on an intermediate image carrier using a developer fluid comprising charged toner particles and developer fluid in an electrographic printing or copying device, a feed device is provided comprising as function elements at least one chamber scraper, a raster element comprising cups to receiver the developer fluid, and at least one first flow element arranged in the chamber scraper. Between the at least one flow element and the raster element an electrical voltage is supplied such that a toner particle concentration in the cups of the raster element is increased. An application device accepts the developer fluid from the feed device and supplies it to the intermediate image carrier.
    Type: Application
    Filed: November 14, 2006
    Publication date: November 13, 2008
    Inventors: Martin Berg, Volkhard Maess, Andreas Wirtz
  • Publication number: 20060140661
    Abstract: In a method and system for transfer printing of an electrostatic recharge toner image from an intermediate carrier onto a recording medium and for fixing of the transfer-printed toner image onto the recording medium, the recording medium lying on an electrostatically-chargeable conveyor belt and adhered thereto by electrostatic forces is transported through a transfer printing region and subsequently along a guided transport section. The recording medium is conveyed to a fixing device. The guided transport section is arranged in a transport unit and the fixing device is arranged in a fixing unit which are independent of one another. The fixing unit has at least one wall designed to hinder a heat transfer from the fixing unit to the transport unit.
    Type: Application
    Filed: October 10, 2003
    Publication date: June 29, 2006
    Applicant: Oce Printing Systems GmbH
    Inventors: Markus Stahuber, Andreas Wirtz
  • Patent number: 6676124
    Abstract: A printer or copier has a sheet alignment apparatus including a pair of detents, or walls, at a right angle to one another against which the sheet is moved. To move the sheet, a sheet positioning mechanism is provided which includes two paddlewheels that engage the sheet as they rotate and that are directed offset from one another. The paddlewheels may be angled to shear with one another, and the mounting on which they are supported may be pivotable to redirect the paddlewheels.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: January 13, 2004
    Assignee: Océ Printing Systems GmbH
    Inventor: Andreas Wirtz