Patents by Inventor Raymond O. Bertsch

Raymond O. Bertsch 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).

  • Folding carton blank and method of forming same
    Patent number: 5090616
    Abstract: A modified glue flap of a folding carton blank for preventing glue from being squeezed out during the step of adhering the glue flap to the opposite end panel. The face of the glue flap engaged by the glue back-up wheel includes a protrusion near the trailing edge of the flap. Engagement of the protrusion by the back-up wheel causes the glue wheel to skip the trailing area of the flap. The absence of glue in this area prevents glue from being squeezed out when sealing pressure is subsequently applied to the glue flap and the opposite end panel. The protrusion may take the form of an embossed ridge, forming a channel on the opposite side of the protrusion for receiving any excess glue which would have been squeezed out.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: February 25, 1992
    Assignee: Riverwood Natural Resources Corporation
    Inventor: Raymond O. Bertsch
  • Folding carton blank and method of forming same
    Patent number: 5071401
    Abstract: A modified glue flap of a folding carton blank for preventing glue from being squeezed out during the step of adhering the glue flap to the opposite end panel. The face of the glue flap engaged by the glue back-up wheel includes a protrusion near the trailing edge of the flap. Engagement of the protrusion by the back-up wheel causes the glue wheel to skip the trailing area of the flap. The absence of glue in this area prevents glue from being squeezed out when sealing pressure is subsequently applied to the glue flap and the opposite end panel. The protrusion may take the form of an embossed ridge, forming a channel on the opposite side of the protrusion for receiving any excess glue which would have been squeezed out.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: December 10, 1991
    Assignee: Riverwood International Corporation
    Inventor: Raymond O. Bertsch