Sealing device for packaging machine

A packaging machine comprising:

• a support structure extending prevalently along a first axis;
• at least one sealing station, connected mechanically to the support structure, and configured to be moved towards and/or away from the support structure so as to move towards and/or away from edges of a film to be sealed;
• wherein the packaging machine comprises a sealing device mounted mechanically on the at least one sealing station, comprising:
• a containment body extending prevalently along a first axis, between a first end and a second end, and defining a housing volume in which at least one heating element is housable;
• sealing elements associated mechanically with the containment body and configured to seal together edges of the film that are arranged adjacent to or overlapping one another;
• and
• wherein the sealing elements comprise a plurality of rolling elements configured to be placed in contact with at least one of the edges to achieve a sealing by a rolling contact, wherein the containment body defines a plurality of seats each arranged on an operating face of the body and substantially aligned to the first axis, each seat being configured to house at least one rolling element of the plurality of rolling elements, and wherein each seat of the plurality of seats is configured to receive at least two rolling elements of the plurality of rolling elements arranged alongside one another along a second axis.