Patent SE-1950831-A1 (SE)
Title: Method of producing a packaging container and a packaging container
Inventor: ANDERSSON RICKARD
IPC: B65D3/14
Filed: 2019-07-02
Abstract: The present disclosure pertains to method of forming a paperboard packaging container (1) from a rectangular body blank (2), the method comprising the following step;a) providing a rectangular body blank (2), the body blank (2) having a longitudinal direction (L) and a transverse direction (T), the body blank (2) having a first transverse edge (3) and a second transverse edge (4) and a first and a second side edge (5,6), an inside surface (7) and an outside surface (8), the body blank (2) being made from a laminate sheet material comprising a carton substrate layer, the body blank comprising two or more parallel crease lines (9), the parallel crease lines (9) extending between respective first and second line end points (10,11), the respective first line end points (10) each being arranged with a distance (d1) of from 2 mm to 15 mm from the first side edge (5) and the respective second line end points (11) each being arranged with a distance (d2) of from 2 mm to 15 mm from the second side edge (6);b) forming a tubular container body (12) from the rectangular body blank (2), the container body having a first end (13) with a first body opening (14) and a second end (15) with a second body opening (16) and a container body wall (17) extending in a height direction (H) of the packaging container (1) between the first body opening (14) and the second body opening (16), the height direction (H) of the packaging container (1) corresponding to the longitudinal direction (L) of the body blank (2), the container body wall (17) having an inner surface (18) and an outer surface (19), a first end edge (20) and a second end edge (28);c) sealing together the first and the second side edge (5,6) in a but-to-but seal using a sealing strip (22) having a sealing strip width (ws), the sealing strip (22) extending over a non-creased area (23) bridging the first and the second side edge (5,6) and extending between the first and second end points (10,11) of the two or more parallel continuous crease lines (9);d) presenting the tubular container body (12) to a crease line forming station (24) and providing the non-creased area (23) bridging over the sealing strip (22) and extending between the respective first and second end points (10,11) with two or more bridging crease lines (21 ) such that a bridging crease line area (25) is formed, extending in a circumferential direction (C) corresponding to the transverse direction (T) for the body blank (2);e) closing the second body opening (16) by pressing a paperboard disc (26) into the second body opening (16), the paperboard disc (26) having a peripheral flange (27) being flexed towards the second end (15) in the height direction (H) of the paperboard packaging container (1) and sealing the peripheral flange (27) of the paperboard disc (26) to the inner surface (18) of the container wall (17);f) forming a curled second edge (28) by folding or rolling the second end (15) of the container body wall (17) inwardly, at the two or more parallel crease lines (9) and the crease line area (25), the curled second edge (28) comprising an edge portion (28a) and an inner portion (28b);g) filling the packaging container (1) with bulk solids;h) closing the upper body opening (14);i) wherein steps h) and subsequently step g) could alternatively come after step d). The present disclosure also relates to a paperboard packaging container.