Patents by Inventor Kjell Jonsson

Kjell Jonsson 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).

  • Control device for machining webs
    Patent number: 4080656
    Abstract: In apparatus having at least two roll pairs and/or stretch rolls each having a driving means with an amplifier for speed control, the speed control reference for each drive is developed by summing signals developed in adjacent control circuits such as to obtain a relationship in which, for example, for the second drive the signal is V.sub.0 (1 + S.sub.1) (1 + S.sub.2) where V.sub.0 is a basic speed reference signal and S.sub.1 and S.sub.2 desired relative speed differences for first and second drives to thereby permit speed adjustments.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: March 21, 1978
    Assignee: ASEA Aktiebolag
    Inventors: Kjell Jonsson, Lennart Nilsson