B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/69
B21D 22/20 (2006.01) B21D 22/30 (2006.01) B21D 24/00 (2006.01)
Patent
CA 1146018
-19 - ABSTRACT In manufacture of a can body by drawing a cup from a blank and subsequently redrawing the cup, one or more redrawing steps are performed by pulling the sidewall of the cup (2) by means of a punch (12) through an S-shaped path (30,24,31), whereby the wall is bent first in one direction and then in the other, to reduce its diameter, which is then reduced further in a convergent portion (20) of the die (10). The bending induces back tensions which stretch the metal and reduce its wall thickness.
363644
Franek Josef T.
Porucznik Paul
Gowling Lafleur Henderson Llp
Metal Box Limited
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