Process for the manufacture of rings for lids for cans

Details Process for the manufacture of rings for lids for cans Process for the manufacture of rings for lids for cans

B - Operations, Transporting

65

D

113/41

B65D 41/00 (2006.01) B21D 51/38 (2006.01)

Patent

CA 1140397

A B S T R A C T The process allows the manufacture of lacquered aluminum or tin-plate rings which have the inner edge bent over outwards and are suitable for the closures on cans for foodstuffs. A ring blank made of lacquered sheet is pre- shaped by deep drawing to form the curvature needed for bending over the inner cut edge. The final shaping of the pre-shaped blank into a ring for a can lid takes place, after stamping out the opening, by stretching and bending over the cut edge. When a tear-back membrane is sealed on to the bent-over edge, the ring is suitable as an easy- ly opened closure for cans of foodstuffs. - 1 -

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