Patents by Inventor David Bogstad

David Bogstad 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).

  • Method and apparatus for detecting holes in plastic containers
    Publication number: 20050181087
    Abstract: A method and an apparatus for monitoring the production of blow molded plastic containers (20) includes a columnator (26) and sound detector (24) responsive to a defect sound of pressure fluid escaping from a container being formed in a mold cavity (14). The columnator is effective to filter the defect sound from ambient noise. An output signal generated by the sound detector is processed to generate a control signal used to reject a defective container. Preferably, the open end of the columnator is positioned between 20° and 150° from the preform loading station in a rotary platform (12) blow molding machine.
    Type: Application
    Filed: October 31, 2002
    Publication date: August 18, 2005
    Applicant: Plastic Technologies , INC.
    Inventors: Donald Hayward, David Bogstad, Donald Miller