Patents by Inventor Stephan Erhardt

Stephan Erhardt 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 metering dampening solution when printing with a printing form for offset printing
    Patent number: 6257144
    Abstract: A method of metering dampening solution when printing with a printing form for offset printing, including, with a control device, setting an amount of dampening solution on the surface of the printing form to a predetermined value before starting to print, further includes, following one interruption in the printing, determining the number of interruptions which have occurred previously in a predefined time interval, and varying in accordance with the number of interruptions the amount of dampening solution supplied to the surface of the printing form during the one interruption.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: July 10, 2001
    Assignee: Heidelberger Druckmaschinen Aktiengesellschaft
    Inventors: Stephan Erhardt, Franz Haaf, Nikolaus Pfeiffer