Container closure with increased strength

Details Container closure with increased strength Container closure with increased strength

B - Operations, Transporting

65

D

190/143

B65D 8/08 (2006.01) B21D 51/26 (2006.01) B21D 51/38 (2006.01) B21D 51/44 (2006.01) B65D 8/04 (2006.01) B65D 17/40 (2006.01) B65D 41/00 (2006.01) B65D 43/00 (2006.01)

Patent

CA 1309957

THE ABSTRACT A metal closure for a container includes a center panel, a center- panel ring with a convex curved surface, and an inner leg. The metal closure is provided with a band formed by at least coining to increase the buckling pressure. The band is defined as one of intersecting strain fields. The coining cold-works a total uncoined curvilinear length that includes a portion of the center-panel ring, and that optionally includes a portion of the center panel and/or a portion of the inner leg. In one embodiment, the coining produces two frustoconical coined surfaces. In another embodiment, the coining produces a curvilinear coined surface with a generally constant coin residual.

571140

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