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Priority to ES0268292ApriorityCriticalpatent/ES268292A2/en
Publication of ES268292A2publicationCriticalpatent/ES268292A2/en
Improvements introduced in the object of the main Patent No. 249,875, by: Machine to make pipes "in situ", comprising a sheet metal deposit, an apparatus for butt welding the successive sheets, a set of closure, drawing and calibration using matrices , an apparatus for welding the pipe longitudinally and an advance mechanism for the endless pipe, characterized by being applied on any supports. (Machine-translation by Google Translate, not legally binding)
ES0268292A1961-06-161961-06-16Machine for manufacturing in situ tubes (Machine-translation by Google Translate, not legally binding)
ExpiredES268292A2
(en)
Procedure and device for the manufacture of soldered or solder-free steel tube curves without straight part, starting from a straight tube (Machine-translation by Google Translate, not legally binding)