Patents by Inventor Hermann Hafner

Hermann Hafner 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).

  • Automatic, continuously operable bag opening apparatus
    Patent number: 4119227
    Abstract: The present continuously operable bag opening apparatus has two conveyor belts. The upstream end of each belt is supported on a horizontal drive member. The downstream end of each belt is supported on a respective substantially vertically extending guide roller, whereby the upper runs of the conveyor belts form a downwardly open channel, the belt walls of which converge toward the downstream end of the two conveyors. A rotary knife is arranged between the belts so that a bag which travels on the belts over the knife is cut open and its content falls down though said channel.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: October 10, 1978
    Assignee: Martin Wendel KG
    Inventors: Hermann Hafner, Otto Steiper