Patents by Inventor Heinz Luedemann

Heinz Luedemann 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).

  • Web-advancing apparatus
    Patent number: 4332339
    Abstract: An apparatus for transporting webs of photographic material or the like has a web supply roll from which the web is pulled by a pull-off device. According to the invention a tilt arm is mounted intermediate the supply roll and the pull-off device and carries a roller at one end about which the web is drawn off, causing the arm to tilt. Tilting is resisted by a spring acting upon the other end of the arm. An arrangement is provided for varying the resisting force of the spring as a function of the tilted position of the arm.
    Type: Grant
    Filed: June 20, 1980
    Date of Patent: June 1, 1982
    Assignee: AGFA-Gevaert AG
    Inventors: Heinz Luedemann, Klaus Schneider