Abstract: A guiding device for guiding a sheet of packaging material in a packaging machine for producing sealed packages includes: a plurality of folding rollers defining a passage for the sheet of packaging material, the passage having a longitudinal axis, wherein the plurality of folding rollers are configured to cause a first longitudinal edge of the sheet of packaging material to superimpose to a second longitudinal edge of the sheet of packaging material, opposite the first longitudinal edge, wherein the first longitudinal edge and the second longitudinal edge define an overlapping area having an extension, wherein the plurality of folding rollers include: a group of first folding rollers configured to rotate around first rotation axes, and at least one second folding roller configured to rotate around a second rotation axis, and a driving arrangement configured to move the at least one second folding roller towards and away from the longitudinal axis.

Abstract: There is described a unit (1, 1?, 1?) for forming/advancing at least one pack (3) or at least one portion of a pack (3), comprising a frame (11, 12a, 12b), a selectively activatable/deactivatable source of power (42) and at least one carriage (14a, 14b) operationally coupled with source of power (42), movable along a path (13a, 13b) comprising at least one vertical portion (18a, 18b, 19a, 19b), and adapted to convey said at least one pack (3) or said at least one portion of a pack (3); unit (1, 1?, 1?) comprises stopping means (45) fitted to frame (12a, 12b) and which can be operated: to leave carriage (14a, 14b) free to advance along vertical portion (18a, 18b; 19a, 19b), when source of power (42) is activated, and to stop carriage (14a, 14b) along vertical portion (18a, 18b; 19a, 19b), when source of power is, in use, deactivated.

Abstract: A guiding device for guiding a sheet of packaging material (3) in a packaging machine (1) for producing sealed packages (2), said guiding device comprising a plurality of folding rollers defining a passage (31) for said sheet of packaging material (3) and causing a first longitudinal edge (11) of said sheet of packaging material (3) to superimpose to a second longitudinal edge (15) of said sheet of packaging material (3), opposite said first longitudinal edge (11), to define an overlapping area (16) of said first longitudinal edge (11) and said second longitudinal edge (15), said overlapping area having a certain extension, said passage having a longitudinal axis (A), said plurality of folding rollers comprising a group of first folding rollers (32) rotatable around first rotation axes (C) arranged in a common first plane, said plurality of folding rollers further comprising at least one second folding roller (33) rotatable around a second rotation axis (D) arranged in a second plane, different from said firs

Abstract: There is described a linear motor device (1) for a packaging machine comprising an endless circulating carrier (2) having an outer surface (3) and at least one endless guide rail (6, 7), at least one movable cart (4) adapted to advance along the circulating carrier (2). The movable cart (4) has a magnet assembly (12) and a cart base (13) adapted to connect to the magnet assembly (12). The cart base (13) comprises a main portion (22) connected to the magnet assembly (12) and at least one removable side portion (23) removably connected to the main portion (22).

Abstract: There is described a unit (1, 1?, 1?) for forming/advancing at least one pack (3) or at least one portion of a pack (3), comprising a frame (11, 12a, 12b), a selectively activatable/deactivatable source of power (42) and at least one carriage (14a, 14b) operationally coupled with source of power (42), movable along a path (13a, 13b) comprising at least one vertical portion (18a, 18b, 19a, 19b), and adapted to convey said at least one pack (3) or said at least one portion of a pack (3); unit (1, 1?, 1?) comprises stopping means (45) fitted to frame (12a, 12b) and which can be operated: to leave carriage (14a, 14b) free to advance along vertical portion (18a, 18b; 19a, 19b), when source of power (42) is activated, and to stop carriage (14a, 14b) along vertical portion (18a, 18b; 19a, 19b), when source of power is, in use, deactivated.