Patent ID: 7156248

Claim:
Overcap ( 1 , 11 , 12 ) designed to overcap a neck ( 80 ) of a bottle ( 8 ) closed by a cork ( 82 ) containing a liquid to be packaged ( 83 , 84 ), comprising a rolled skirt ( 3 ) and a top ( 2 ) fixed to the rolled skirt around a circular junction area ( 4 ) common to the skirt and the top, wherein: a1) the top is formed from a first strip of material chosen to have a nature and thickness so that it can be deformed to form a crease free rim around the top, a2) the rim is formed by the peripheral part of a top axially deformed over a height H between 1 and 5 mm thereby forming a terminal end of the rim, a3) the rim extends around an arc of a circle α varying from 45 to 90°, b1) the rolled skirt comprises an upper end ( 30 ) necked in over a width of at least 1 mm, cooperating with the rim to form the circular junction area, b2) the rolled skirt ( 3 ) is formed from a second strip of material ( 6 ) of lesser mechanical strength than the first strip of material and selected such that the top is not modified by any creases in the upper necked in end, b3) the upper necked in end ( 30 ) is a rounded end ( 31 ) in an arc of a circle β varying from 45 to 90°, c1) the circular junction area ( 4 ) common to the rim ( 20 , 21 , 22 ) and to the upper end ( 30 ) extends over a width L equal to at least 0.5 mm, and c2) the circular junction area ( 4 ) that comprises the part of the top that covers the necked in upper end ( 30 , 31 ), extends around at least an arc of a circle γ varying from 30° to 90°.