Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AGfiledCriticalMannesmann AG
Priority to FR931387ApriorityCriticalpatent/FR1353856A/fr
Application grantedgrantedCritical
Publication of FR1353856ApublicationCriticalpatent/FR1353856A/fr
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
B23K11/00—Resistance welding; Severing by resistance heating
B23K11/08—Seam welding not restricted to one of the preceding subgroups
B23K11/082—Seam welding not restricted to one of the preceding subgroups of three-dimensional seams
B23K11/084—Seam welding not restricted to one of the preceding subgroups of three-dimensional seams of helicoïdal seams
FR931387A1963-04-121963-04-12Procédé de fabrication d'un tuyau par enroulement en hélice d'une bande métallique
ExpiredFR1353856A
(fr)