Patents by Inventor J. David Sweeney

J. David Sweeney 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).

  • Side sealing mechanism for a packaging machine
    Patent number: 4380446
    Abstract: Heat sealing bars are spaced circumferentially around a rotatable drum and seal together two face-to-face strips of material as the strips are drawn continuously around the drum. The sealing bars are automatically moved radially inwardly and outwardly to change the circumferential distance between the bars and the effective diameter of the drum and thereby keep the bars in register with printed material on the strips.
    Type: Grant
    Filed: September 12, 1980
    Date of Patent: April 19, 1983
    Assignee: Rexham Corporation
    Inventors: J. Douglas Dickson, J. David Sweeney, Ronald K. Coleman