Patents by Inventor Gerhard Lipfert

Gerhard Lipfert 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).

  • Automatic regulation of the position of the lateral edge of a travelling web
    Patent number: 4049213
    Abstract: A web travels along a predetermined path. A regulating system automatically keeps the position of the preselected first tolerance range. The system includes sensing, position-correcting and regulator units. The sensing unit senses the position of the lateral edge of the travelling web. The position-correcting unit effects corrective movements of the travelling web in a manner causing the lateral edge thereof to change positions. The regulator unit is connected to the sensing and position-correcting units and causes the latter to effect corrective movements of the travelling web at a first speed when the sensed position of the web edge is outside the first tolerance range and at a different second speed when the sensed position of the web edge is outside a preselected different second tolerance range.
    Type: Grant
    Filed: April 27, 1976
    Date of Patent: September 20, 1977
    Assignee: VEB Polygraph Leipzig Kombinat fur Polygraphische Maschinen und Ausrustungen
    Inventors: Dietrich Hank, Gerhard Lipfert, Tassilo Niesgoda