Patents by Inventor Rolf T. Anderson

Rolf T. Anderson 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).

  • Closed loop interactive controller
    Patent number: 7480542
    Abstract: An injection mold apparatus has multiple injection zones, each zone having at least one heater and at least one temperature sensor generating a temperature indicating signal. A power source provides power to the heaters. A controller controls the temperature of at least some of the zones. For efficiency, the controller has two separate processors, a data-receiving processor for receiving temperature indicating signal from each sensor as well as power signals, and a control processor for receiving data from the data-receiving processor and for controlling the amount of power provided to the heaters. Preferably, the control is in a housing, with the housing mounted directly on the mold. Modified PID calculations are utilized. Power calculations for the amount of power to the heaters utilizes a modulo based algorithm.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: January 20, 2009
    Assignee: Caco Pacific Corporation
    Inventors: Charles R. Kroeger, Rolf T. Anderson, Keith A. Rubow
  • Closed loop interactive controller
    Publication number: 20030154004
    Abstract: An injection mold apparatus has multiple injection zones, each zone having at least one heater and at least one temperature sensor generating a temperature indicating signal. A power source provides power to the heaters. A controller controls the temperature of at least some of the zones. For efficiency, the controller has two separate processors, a data-receiving processor for receiving temperature indicating signal from each sensor as well as power signals, and a control processor for receiving data from the data-receiving processor and for controlling the amount of power provided to the heaters. Preferably, the control is in a housing, with the housing mounted directly on the mold. Modified PID calculations are utilized. Power calculations for the amount of power to the heaters utilizes a modulo based algorithm.
    Type: Application
    Filed: January 23, 2003
    Publication date: August 14, 2003
    Inventors: Charles R. Kroeger, Rolf T. Anderson, Keith A. Rubow
  • Closed loop interactive controller
    Patent number: 6529796
    Abstract: An injection mold apparatus has multiple injection zones, each zone having at least one heater and at least one temperature sensor generating a temperature indicating signal. A power source provides power to the heaters. A controller controls the temperature of at least some of the zones. For efficiency, the controller has two separate processors, a data-receiving processor for receiving temperature indicating signal from each sensor as well as power signals, and a control processor for receiving data from the data-receiving processor and for controlling the amount of power provided to the heaters. Preferably, the control is in a housing, with the housing mounted directly on the mold. Modified PID calculations are utilized. Power calculations for the amount of power to the heaters utilizes a modulo based algorithm.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: March 4, 2003
    Assignee: Caco Pacific Corporation
    Inventors: Charles R. Kroeger, Rolf T. Anderson, Keith A. Rubow