B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
B—PERFORMING OPERATIONS; TRANSPORTING
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
B21C37/16—Making tubes with varying diameter in longitudinal direction
B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
Dispositif d'enroulement a deux rouleaux d'entrainement pour machine a enrouler en continu et procede d'enroulement avec regulation de l'effort d'application des rouleaux d'entrainement
Limiteur de vitesse pour caisses ou palettes diversement chargees, susceptibles de se deplacer par gravite sur un plan incline forme de rouleaux ou galets