Patents by Inventor Nils-Ake Sternhamn

Nils-Ake Sternhamn 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).

  • Device for introducing liquid composition into the pipes formed by flutes of corrugated cardboard sheets
    Patent number: 5162061
    Abstract: The device of the invention for introducing liquid composition into the pipes of corrugated cardboard sheets comprises at least one guide bar (3) having a guiding slot (4) for the top edges of the sheets being conveyed below the guide bar. Knives (8) are provided near the bottom edges of the slot. To cut loose narrow top edge areas of the exterior walls of the corrugated cardboard sheets from the adjacent pipe walls the edge areas constituting seals against the side walls of the slot exteriorly of the knives. Injector nozzles (13) open into the slot bottom for injecting composition into the pipes of the corrugated cardboard sheets. The vertical distance between the bottom of the guide bar slot and the conveyor is adjustable. The injectors are connected into a composition circulation circuit.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: November 10, 1992
    Inventor: Nils-Ake Sternhamn