Patents by Inventor Rolf Dewert

Rolf Dewert 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).

  • Gusseted bag made of a flexible weldable material
    Patent number: 6398412
    Abstract: A gusseted bag made of a flexible weldable material has a closed bottom end that at the inside top end is provided with a reclosable device. Side gussets are inserted between the two bag walls that form the front bag wall and the rear bag wall to stretch from the bottom end to the top end and terminate at a distance below the upper edge of the bag walls and thus define a top area of the bag without side gussets. The reclosable device is formed between the two bag walls, the upper ends of the side gussets being closed by welding to themselves and reach freely into the interior space of the bag underneath the reclosable device.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: June 4, 2002
    Assignee: Bischof und Klein & Co. KG
    Inventors: Johannes Wedi, Rolf Dewert
  • Gusseted bag made of a flexible weldable material
    Publication number: 20010051008
    Abstract: A gusseted bag made of a flexible weldable material has a closed bottom end that at the inside top end is provided with a reclosable device. Side gussets are inserted between the two bag walls that form the front bag wall and the rear bag wall to stretch from the bottom end to the top end and terminate at a distance below the upper edge of the bag walls and thus define a top area of the bag without side gussets. The reclosable device is formed between the two bag walls, the upper ends of the side gussets being closed by welding to themselves and reach freely into the interior space of the bag underneath the reclosable device.
    Type: Application
    Filed: June 13, 2001
    Publication date: December 13, 2001
    Inventors: Johannes Wedi, Rolf Dewert