公开(公告)号：US11963853B2

公开(公告)日：2024-04-23

申请号：US17427858

申请日：2020-02-11

Applicant: GDM S.p.A.

Inventor： Andrea Duchini ,  Giacomo Noferini ,  Matteo Piantoni ,  Gabriele Resmini ,  Marco Rosani ,  Alessandro Saccomani ,  Maurizio Spatti

IPC: B29C65/08 ,  A61F13/15 ,  B29C65/00 ,  B29C65/78 ,  B29L31/48

CPC classification number: A61F13/15739 ,  B29C65/087 ,  B29C65/7847 ,  B29C65/7885 ,  B29C65/7894 ,  B29C66/0062 ,  B29C66/1122 ,  B29C66/431 ,  B29C66/81465 ,  B29C66/8226 ,  B29C66/8242 ,  B29C66/8322 ,  B29C66/8324 ,  B29C66/83517 ,  B29C66/8412 ,  A61F2013/15869 ,  B29C2793/009 ,  B29L2031/4878

Abstract: A rotary welding device which includes a rotary part rotating about its axis of rotation, one or more supporting elements for supporting a continuous strip, specifically a strip of nappies, supported by the rotary part, and a plurality of welding units, mounted on the rotary part, for welding the continuous strip; each welding unit is configured to pass from a non-operating position to an operating position and vice versa; each welding unit includes a respective welding tip and a respective anvil element which is movable relative to the welding tip; each welding unit includes respective first movement means 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 the surface of the welding tip and the surface of the anvil element are parallel and aligned with each other along the same axis, and vice versa.

公开(公告)号：US11510824B2

公开(公告)日：2022-11-29

申请号：US17368314

申请日：2021-07-06

Applicant: GDM S.p.A.

Inventor： Andrea Duchini ,  Aldo Fusar Poli ,  Matteo Piantoni ,  Gabriele Resmini ,  Marco Rosani ,  Maurizio Spatti

IPC: A61F13/15 ,  B29C65/78 ,  B29C65/00

Abstract: A rotary device for welding a continuous web comprises a rotary unit rotating about a respective axis and welding units for welding the web mounted, angularly spaced, on the rotary unit. A movement device varies a radial position of the welding units. First and second supporting elements supporting the web are disposed, respectively, upstream and downstream of respective ones of the welding units, to keep the web tensioned when the respective welding unit is at an operating position. The first and second supporting elements are supported by a load-bearing structure connected to the welding units in such a way that a radial movement of the welding units corresponds to a movement of the first and second supporting elements towards and away from the axis.