Full-aperture easy-open metal can-end

A full-aperture easy-open metal can-end with low opening forces for a can of the type which is opened by lifting and pulling of a tab attached to the can-end, said can-end having

• a) a can-end wall bounded by an outer circumference, and
• b) an endless score-line extending close to the outer circumference and defining a removable region of the can-end wall which is removed on opening,
• c) said removable region of said can-end wall having a profiled shape providing a plurality of terraces which are at different height positions with respect to the longitudinal can axis, and a plurality of inclined transition zones respectively between and connecting pairs of said terraces, said terraces comprising a flat outer terrace extending adjacent said score-line along at least part of the length of said score-line, an innermost terrace which is located more centrally in the can-end relative to said outer terrace and at least one intermediate terrace which is located between said outer terrace and said innermost terrace and has an inclination at an inclination angle in the range 3.degree. to 20.degree. to a plane perpendicular to the can axis, said inclination being in the direction opposite to a direction of inclination said inclined transition zone connecting said intermediate terrace to the next adjacent one of said terraces outwardly thereof.