Patents Assigned to Nicolet Zeta
  • Graphic recorder
    Patent number: 4477822
    Abstract: A graphic recorder of the vacuum column buffer type has a pair of wells into which the two loops on the sheet material are drawn down. Top and bottom sensors are provided in each well for maintaining the loops within a predetermined range of movement; but in addition, the supply and take-up rolls are slaved to the speed of the drum. Cross-coupling is provided between the two wells to tend to equalize the vacuums therein.
    Type: Grant
    Filed: August 20, 1982
    Date of Patent: October 16, 1984
    Assignee: Nicolet Zeta
    Inventors: Thomas Luoma, Alan Rutherford