CAN FACE LID Russian patent published in 2011 - IPC B65D8/18 

FIELD: transport, package.

SUBSTANCE: invention relates to containers with rigid joints between walls. Seal easy lid of can for example, for beer, comprises central panel 18 with closing element for can sealing made up of, for example, tear-off lug formed by tear-off notch. Lid outer perimetre is confined by curled edge from which annular clamping wall 14 runs downward and is jointed by transition wall 16 to peripheral edge 52 of central panel 18. Transition wall 16 comprises fold section that has first arm 56, second arm 62 and third arm 68. Metal thickness along curved concave annular section 58 and convex section 64 is exceeds by 1-20% metal thickness of central panel 18. In compliance with one version, inner radius R_inner of curvature exceeds 0.051 mm. In compliance with another version, height H_fold of fold top vertical edge is at least 0,89 mm higher than of central panel bottom vertical edge. Note also that fold section runs upward above horizontal plane confined by bottom vertical edge of central panel 18 at angle (λ) greater than one degree.

EFFECT: reduced weight and sufficient strength.

11 cl, 70 dwg