The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2023
Filed:
Sep. 04, 2019
Tetra Laval Holdings & Finance S.a., Pully, CH;
Paolo Sanibondi, Reggio Emilia, IT;
Claudio Ferrari, Albinea, IT;
Filippo Ferrarini, Modena, IT;
Nicola Macini, Modena, IT;
Tetra Laval Holdings & Finance S.A., Pully, CH;
Abstract
There is described a method for forming a tube () of a web () of packaging material comprising the steps of advancing the web () of packaging material along a web advancement path (P), overlapping a first lateral edge () of the web (') of packaging material with a second lateral edge () of the web () of packaging material for obtaining a longitudinal seam portion of the tube () and fusing at least an internal outer surface () of the first lateral edge () and an external outer surface () of the second lateral edge () with one another for longitudinally sealing the seam portion of the tube (). The step of fusing comprises at least the substeps of directly heating the external outer surface () of the second lateral edge () and heating by contact the internal outer surface () by establishing contact between the internal outer surface () and the directly heated external outer surface ().