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Publication of ES200547A2publicationCriticalpatent/ES200547A2/en
Improvements in the main patent object by method of manufacturing elbow tubes that in order to obtain at any point of a straight or already curved tube a decentered bulge or dilatation that is a bulging or unilateral swelling of the wall procedure characterized by heating the region in which the protuberance and two other regions located on each side of the first and at 180 [deg.] thereof, that is on the opposite side of the tube, after which the tube is subjected to a bending stress directed from the side in the that the protrusion should occur after eventually starting a slight bending in the opposite direction. (Machine-translation by Google Translate, not legally binding)
ES0200547A1951-01-041951-11-21Procedure for manufacturing pipe tubes (Machine-translation by Google Translate, not legally binding)
ExpiredES200547A2
(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)