B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/40
B21D 51/44 (2006.01) B21D 51/26 (2006.01) B65D 1/16 (2006.01)
Patent
CA 1218566
"Method for the manufacture of metal packaging cans, and a semi-product in the manufacture of such cans" ABSTRACT OF THE DISCLOSURE In the manufacture of metal packaging cans metal sheet is deep-drawn and ironed to form a seamless tube having a bottom in one-piece therewith, and the tube is cut transversely to remove excess material at the end remote from the bottom. This forms a cylindrical body and bottom of a two-piece can. To minimise waste of material and to make possible the manufacture of a thin-walled three-piece can, the method includes cutting the deep-drawn and ironed tube transversely at at least one location intermediate the bottom and the end remote from the bottom so that, from the tube, there are formed a cylindrical body and bottom of a two- piece can and at least one cylindrical body of a three-piece can. Suitably, the tube is shaped by the deep-drawing and ironing so as to have a lesser wall-thickness at regions corresponding to the side- walls of the cans and a greater wall-thickness at regions which correspond to the flange portions of the cans.
450486
Hoogovens Groep Bv
Ridout & Maybee Llp
LandOfFree
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