B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 15/08 (2006.01) B65D 1/12 (2006.01)
Patent
CA 2130560
2130560 9317864 PCTABS00025 A can end is formed from a metal sheet having adhered thereto a coating of a semi-crystalline thermoplastic polyester film. The can end comprises a central panel (4), a panel wall (5) dependent from the periphery of the centre panel, an annular countersink bead (6) extending outwardly from the panel wall (5), a chuck wall (7) extending upwardly from the periphery of the countersink bead and an annular seaming panel (8) extending radially from the chuck wall (7). The metal sheet comprises an aluminium alloy having a magnesium content between 0.8 % and 2.0 % by weight and manganese content between 0.6 % and 1.5 % by weight; the polyester coating has a crystallinity factor in the range 0.05 to 0.5 measured by X-ray diffraction; and the distance between the chuck wall and panel wall is between 0.85 mm and 1.0 mm as measured at a height of 0.45 mm above the lowest part of the upper surface of the countersink bead
Brown Alison Margaret
Heyes Peter John
Carnaudmetalbox Plc
Finlayson & Singlehurst
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