US 12,479,183 B2
Packaging container and a method of producing such a packaging container
Simon Holka, Staffanstorp (SE); Per Hagelqvist, Lund (SE); Anna Naukkarinen, Helsingborg (SE); and My Hommerberg, Malmö (SE)
Assigned to Graphic Packaging International, LLC, Atlanta, GA (US)
Filed by GPI Systems AB, Lund (SE)
Filed on Aug. 4, 2023, as Appl. No. 18/230,195.
Claims priority of application No. 2250951-7 (SE), filed on Aug. 5, 2022.
Prior Publication US 2024/0042722 A1, Feb. 8, 2024
Int. Cl. B31B 70/00 (2017.01); B31B 70/74 (2017.01)
CPC B31B 70/008 (2017.08) [B31B 70/74 (2017.08); B31B 2241/00 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A method of forming a paperboard packaging container for bulk solids, the method comprising:
obtaining a body blank having a first side edge and a second side edge, the body blank being made of a laminate sheet material comprising a carton substrate layer;
forming a container body from the body blank, the container body defines an inner compartment, the container body comprises a container body wall having an inner surface facing the inner compartment, an outer surface facing away from the inner compartment, and a weakened portion extending along at least a portion of the circumference of the container body, the container body comprises a first end with a first end opening and a second end opposite the first end having a second end opening;
closing the first end opening by pressing a first paperboard insert into the first end opening to a first predetermined position relative to the container body and forming an external recess, the first paperboard insert comprising a first central portion covering the first end opening and a first peripheral flange portion, at the first predetermined position of the first paperboard insert;
attaching the first peripheral flange portion of the first paperboard insert to the container body wall at a first attachment portion of the container body, the weakened portion in the container body wall is between the first attachment portion and the second end of the container body;
pressing a second paperboard insert into the external recess through the first end opening to a second predetermined position relative to the container body, the second paperboard insert comprising a second central portion covering the first end opening and a second peripheral flange portion; and
attaching the second peripheral flange portion of the second paperboard insert to the container body wall.