Patents by Inventor Frederick C. Hagemeister

Frederick C. Hagemeister 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).

  • Patent number: 4278383
    Abstract: Apparatus and method of automatically opening and emptying bags. The apparatus includes a bag outlet, a bag inlet, and a bag contents collection hopper. The housing has a cutting zone, a bag emptying zone, and a bag ejection zone to cut through opposite sides of the bags as the bags are transported lying generally horizontally. A conveyor is disposed within the housing for transporting the bags between the inlet and outlet. The conveyor includes a track member and a carrier member. Elongated piercing members are mounted on the carrier member to positively engage the bags along opposite lateral edges thereof. A ramp member is provided on the track member to tilt the opposite lateral edges of the bag upward and toward each other as the carrier member rides thereon.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: July 14, 1981
    Assignee: Whirl-Air-Flow Corporation
    Inventors: Edward E. Mueller, Michael K. Harrod, Frederick C. Hagemeister