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Application filed by Handelsvennootschap Onder De Firma Thijssen & CofiledCriticalHandelsvennootschap Onder De Firma Thijssen & Co
Application grantedgrantedCritical
Publication of NL644CpublicationCriticalpatent/NL644C/nl
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
B21C37/15—Making tubes of special shape; Making tube fittings
B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
B21C37/283—Making U-pieces
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
NL1982A1912-01-271913-01-27Werkwijze voor het vervaardigen van keerstukken voor pijpleidingen in het bijzonder voor oververhitterpijpen
NL644C
(nl)
Verbetering eener werkwijze voor het vervaardigen van schroeflijnvormige gegolfde pijpen en de met toepassing dier verbeterde werkwijze vervaardigde schroeflijnvormig gegolfde pijp