公开(公告)号：US11447361B2

公开(公告)日：2022-09-20

申请号：US17078855

申请日：2020-10-23

Applicant: GDM S.p.A.

Inventor： Aldo Fusar Poli ,  Marco Rosani ,  Matteo Piantoni

IPC: B65H45/22 ,  B65H23/02 ,  B65H23/032

Abstract: A folding apparatus for a continuous web being fed in a plant for the production of hygienic absorbent articles and intended to be folded into a “V” or “U” shape in a first and in a second longitudinal portion according to a longitudinal folding line parallel to a feeding line of the continuous web comprises a folding section including a first and a second power-driven, movable suction belt and an adjusting system for adjusting a relative position of the longitudinal edges of the continuous web once it has been folded; the adjusting system is configured to adjust the position of the first belt and/or of the second belt depending on at least a first information sent by the first sensor to the computerised control unit.

公开(公告)号：US12168587B2

公开(公告)日：2024-12-17

申请号：US17052358

申请日：2019-05-07

Applicant: GDM S.p.A.

Inventor： Aldo Fusar Poli ,  Marco Rosani ,  Matteo Piantoni

IPC: B65H37/06 ,  B65H20/06

Abstract: A folding apparatus for a continuous web for production of absorbent hygiene articles and intended to be folded into a “V” or “U” shape in first and second longitudinal portions along a folding line parallel to a feeding line. A folding section includes a contact unit extending along the feeding line and defining the folding line. First and second guides are positioned on opposite sides of the contact unit and respectively have first and second sliding surfaces. The first and second sliding surfaces extend in a helical fashion along the feeding line, each having a respective infeed section, where the web is not folded, and a respective outfeed section, positioned downstream of the respective infeed section according to a web feeding direction, where the web is folded in two and has the first portion and the second portion set at an angle to each other.

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.