US 12,378,022 B2
Packaging machine
Christian Zagnoni, Calcara Valsamoggia (IT); and Leonardo Stamati, Bologna (IT)
Assigned to PLUSLINE S.R.L., Zola Predosa (IT)
Appl. No. 18/284,544
Filed by PLUSLINE S.R.L., Zola Predosa (IT)
PCT Filed Apr. 6, 2022, PCT No. PCT/IT2022/050081
§ 371(c)(1), (2) Date Sep. 28, 2023,
PCT Pub. No. WO2022/224283, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 102021000009974 (IT), filed on Apr. 20, 2021.
Prior Publication US 2024/0174392 A1, May 30, 2024
Int. Cl. B65B 11/22 (2006.01); B65B 49/08 (2006.01); B65B 51/02 (2006.01)
CPC B65B 11/22 (2013.01) [B65B 49/08 (2013.01); B65B 51/023 (2013.01)] 17 Claims
OG exemplary drawing
 
1. Packaging machine comprising:
a packaging unit with an entry station having an elevator for arranging one or more paper rolls in a configuration suitable for their packaging with a packaging sheet of paper material so as to realize packages comprising an upper side, a lower side formed by the junction of two side flaps of the packaging sheet folded under the rolls, side folds, a first head flap and a head closure flap on each head, the latter being formed by a flap overlapping and joined to the other flaps;
packaging sheet feeding means for feeding a packaging sheet of paper material to said entry station, the packaging sheet feeding means comprising an unwinder for supporting a packaging sheet reel;
folding means comprising mobile horizontal surfaces apt to fold two side flaps of the packaging sheet under the rolls;
joining means comprising a presser for joining said side flaps to one another under the rolls;
conveyor means for moving the packages being formed along a predefined direction inside the machine;
a folding unit comprising movable side folders and a fixed lateral counter-folder configured for forming two side folds on each of the two heads of each package while the packages advance along said direction;
head closure means comprising helically shaped surfaces configured for forming a head closure flap on each head of the package;
the packaging machine further comprising:
first adhesivation means comprising dispensing nozzles suitable for applying an adhesive substance on an external side of the packaging sheet, arranged and acting upstream of the folding means so as to make said side adhesive before folding it under the rolls;
second adhesivation means comprising a glue dispenser structure adapted to apply an adhesive substance on an internal side of said side folds, arranged and acting downstream of the first adhesivation means and upstream of said means for forming the head closing flaps with respect to said direction
and the first adhesivation means are arranged and acting in the entry station, on one side of a hopper for loading the rolls, such that the adhesivation of said side flap takes place while the rolls pass through the entry station.