Patents by Inventor William J. Durrant

William J. Durrant 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: 5353573
    Abstract: A machine and method for forming, filling and sealing closed individual pinch pouches includes a support for holding a continuous supply of material having a solid bleached sulfate board or paper board surface and a heat sealable plastic coating on one side. A folding apparatus folds the web material onto itself with the heat sealable surface facing itself with a gusset at the fold. Drive rollers pull the material from the source through the folding apparatus. Heating bars form a seal between selected portions of the material by sealing the heat sealable surfaces at intermittent portions. A cutter cuts the material through the seal and forms a blank having opposed sealed edges extending to the gusset and an open edge opposite the gusset. A hammer pushes the gusset of the blank inward to spread apart opposed surfaces of the blank. An injector forces a flowable substance into the blank through the open edge.
    Type: Grant
    Filed: September 16, 1992
    Date of Patent: October 11, 1994
    Assignee: Unique Packaging, Inc.
    Inventor: William J. Durrant