Patent ID: 11963853
Assignee: GDM S.P.A.
Field: Other special machines (Mechanical engineering)
Classification: CPC A  B | IPC A  B

Claim 0:
1. A rotary welding device comprising:
a rotary part rotating about a first axis of rotation,
one or more supporting elements for supporting a continuous strip of absorbent articles, supported by the rotary part,
a plurality of welding units, mounted on the rotary part, for welding the continuous strip;
each welding unit being configured to pass from a non-operating position to an operating position and vice versa;
each welding unit comprising a respective welding tip and a respective anvil element which is movable relative to the welding tip;
the welding tip of each welding unit being directed towards an inside of the rotary part and the respective anvil element towards an outside of the rotary part;
each welding unit comprising a respective first movement mechanism configured to drive the anvil element in rotation relative to the welding tip from an initial position, where the anvil element is angularly spaced from the welding tip, to a final position, where a contact surface of the welding tip and a contact surface of the anvil element are parallel and aligned with each other along a second axis, and vice versa;
a respective first drive mechanism configured to drive the first movement device to cause the anvil element to pass from the initial position to the final position and vice versa;
the first movement mechanism of each welding unit comprising at least one articulated system comprising a crank, a conrod, connected to the crank, and a lever, connected to the conrod, for supporting the anvil element and oscillating about an axis of oscillation; the oscillating of the lever causing the anvil element to be driven angularly relative to the welding tip from the initial position to the final position, and vice versa.