cans or tins; Closing same in a permanent manner (making outlet arrangements B21D51/38; welding or soldering B23K)

Full Title

Making hollow objects (from thick-walled or non uniform tubes B21K21/00) > characterised by the use of the objects (making heat exchangers B21D53/02) > cans or tins; Closing same in a permanent manner (making outlet arrangements B21D51/38; welding or soldering B23K)

Child Classifications

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• B21D 51/2607
• B21D 51/2615
• B21D 51/2646
• B21D 51/2653
• B21D 51/2669
• B21D 51/2676
• B21D 51/2684
• B21D 51/2692
• B21D 51/28 Folding the longitudinal seam
• B21D 51/30 Folding the circumferential seam