公开(公告)号：US20210187870A1

公开(公告)日：2021-06-24

申请号：US16950219

申请日：2020-11-17

Applicant: GDM S.P.A.

Inventor： Matteo PIANTONI ,  Gabriele RESMINI ,  Maurizio SPATTI ,  Aldo FUSAR POLI ,  Andrea DUCHINI ,  Enrico CAMPAGNOLI ,  Luca BORDERI ,  Andrea BIONDI ,  Gianluca PARISINI

IPC: B29C65/78 ,  B29C65/00 ,  B29C65/08

Abstract: A rotary device for welding a continuous web includes a rotary element, support elements for supporting the web, supported by the rotary element, and a plurality of welding units for welding the web. Each welding unit passes from a non-operating position to an operating position and vice versa, and includes a first movement device for commanding a relative rotation of an anvil element relative to a welding tip and a second movement device for moving the anvil element relative to the welding tip such that a contact surface of the anvil element and a contact surface of the welding tip make contact with a portion of the web in a zone between them, and vice versa. First and second drive mechanisms drive the first and second movement devices. The first and second drive mechanisms are configured to vary a positioning of the welding tip relative to the axis.