Patents Assigned to Heidelberg Druckmaschinen Aktiengesellschaft
  • Patent number: 5996492
    Abstract: A method for regulating web tension in a web-fed rotary offset printing press includes increasing web tension over a predetermined speed range, substantially linearly with web speed, as the printing press runs up to operating speed, and an apparatus for performing the foregoing method.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: December 7, 1999
    Assignee: Heidelberg Druckmaschinen Aktiengesellschaft
    Inventors: Manfred Jurkewitz, Ulrich Kot
  • Patent number: 5267935
    Abstract: It is the object of the invention to provide a simple folding device rotating at high speed, the folding device producing a longitudinal fold without any sliding guidance device or reverse-motion device, and in which during the folding the folding blade executes a movement of stroke, perpendicular in every direction, towards the printed copy.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: December 7, 1993
    Assignee: Heidelberg Druckmaschinen Aktiengesellschaft
    Inventors: Herbert Bialek, Hans Muller