Continuous rotary heat-sealing machine, particularly for joining heat-sealable films or ribbons

A continuous rotary heat-sealing machine comprising:

• a frame provided with at least one first pair of rotating shafts and at least one second pair of rotating shafts;
• at least one pair of tracks, each one mounted on a shaft of said first pair of rotating shafts and on a shaft of said second pair of rotating shafts, said tracks being arranged substantially in contact with each other, rotating in opposite directions, and being adapted to create a pressure plane;
• heating elements provided to heat the tracks that define said pressure plane;
• and
• at least one guiding axle configured to control at least one track of said pair of tracks on rotation, said guiding axle comprising an electrical contact made up of a fixed part and a rotating part, the fixed part being locked on said guiding axle and the rotating part configured to rotate as the at least one track rotates, wherein said tracks comprise sectors which are mutually joined by way of a chain of bearings, said sectors having, on the upper surface, a slider which is fixed to a support, wherein said at least one guiding axle is adapted to control at least one track of said pair of tracks during the rotary motion of said pair of tracks and wherein said at least one guiding axle comprises guides and springs, both connected to a plate, in order to control said sectors of said at least one track.