Patents by Inventor Hans-Georg Jahn

Hans-Georg Jahn 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).

  • Removable numbering and imprinting device for sheet-fed offset machines
    Patent number: 4024812
    Abstract: A removable numbering and imprinting device cooperable with a printing cylinder of a sheet-fed offset machine and located between the rubber cylinder and the sheet delivery includes a numbering shaft mounted on the machine frame and detachably carrying a plurality of numeral units. A self-contained structure defining an inking mechanism is mounted on the machine frame and operable to ink the numeral units. The inking mechanism is readily removable from the machine frame separately from the numbering shaft and the numeral units, whereby removal of the inking mechanism from the machine frame provides ready access to the numbering shaft and the numeral means.
    Type: Grant
    Filed: September 30, 1975
    Date of Patent: May 24, 1977
    Assignee: Heidelberger Druckmaschinen Aktiengesellschaft
    Inventor: Hans-Georg Jahn