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Publication date
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Publication of BE504874ApublicationCriticalpatent/BE504874A/xx
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
B21C37/12—Making tubes or metal hoses with helically arranged seams
B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Bending Of Plates, Rods, And Pipes
(AREA)
Winding, Rewinding, Material Storage Devices
(AREA)
Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs
(AREA)
