Making hollow objects

BPERFORMING OPERATIONS TRANSPORTING B21Mechanical metalworking B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING METAL

B21D51/00Making hollow objects

B21D51/02characterised by the structure of the objects B21D51/04built-up objects B21D51/06folded objects B21D51/08ball-shaped objects B21D51/10conically or cylindrically shaped objects B21D51/12objects with corrugated walls B21D51/14Flattening hollow objects for transport or storage Re-forming same B21D51/16characterised by the use of the objects B21D51/18vessels B21D51/20barrels B21D51/22pots B21D51/24high-pressure containers B21D51/26cans or tins Closing same in a permanent manner B21D51/2607Locally embossing the walls of formed can bodies B21D51/2615Edge treatment of cans or tins B21D51/2623Curling B21D51/263Flanging B21D51/2638Necking B21D51/2646Of particular non cylindrical shape B21D51/2653Methods or machines for closing cans by applying caps or bottoms B21D51/2661Sealing or closing means therefor B21D51/2669Transforming the shape of formed can bodies; Forming can bodies from flattened tubular blanks; Flattening can bodies B21D51/2676Cans or tins having longitudinal or helical seams B21D51/2684Cans or tins having circumferential side seams B21D51/2692Manipulating B21D51/28Folding the longitudinal seam B21D51/30Folding the circumferential seam B21D51/32by rolling B21D51/34by pressing B21D51/36collapsible or like thin-walled tubes B21D51/365involving fixing closure members to the tubes B21D51/38Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels Making can ends Making closures B21D51/383scoring lines, tear strips or pulling tabs B21D51/386on the side-wall of containers B21D51/40Making outlet openings B21D51/42Making or attaching spouts B21D51/44Making closures B21D51/443easily removable closures B21D51/446Feeding or removal of material B21D51/46Placing sealings or sealing material B21D51/48Making crown caps B21D51/50Making screw caps B21D51/52boxes, cigarette cases, or the like B21D51/54cartridge cases