Methods or machines specially adapted for the production of tubular articles

Child Classifications

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• B28B 21/02 by casting into moulds IPC+CPC Available in IPC and CPC
• B28B 21/42 by shaping on or against mandrels or like moulding surfaces IPC+CPC Available in IPC and CPC
• B28B 21/52 by extruding IPC+CPC Available in IPC and CPC
• B28B 21/56 incorporating reinforcements +2 CPC IPC+CPC Available in IPC and CPC
• B28B 21/70 by building-up from preformed elements IPC+CPC Available in IPC and CPC
• B28B 21/76 Moulds +1 CPC IPC+CPC Available in IPC and CPC
• B28B 21/86 Cores (in general B28B7/00) IPC+CPC Available in IPC and CPC
• B28B 21/90 Methods or apparatus for discharging after shaping +1 CPC IPC+CPC Available in IPC and CPC
• B28B 21/92 Methods or apparatus for treating or reshaping +1 CPC IPC+CPC Available in IPC and CPC