Cap for a container having a neck having a single attachment flange

A closure and a container, comprising:

• a neck with an upper edge and a single external attachment flange having a lower side located at a distance below said upper edge of the neck, and said closure being a one piece molded assembly, comprising:
• an attachment ring portion having on its inside a bead for attaching it by snapping below said single external flange of the container neck;
• a cap portion having a perimeter for closing the neck, said cap portion being joined by a hinge to said ring portion at the perimeter, and including an upper disc member defining a lower annular bearing surface for bearing on the upper edge of the container neck and for surrounding an annular sealing skirt projecting downwardly from said bearing surface of said disc member for fitting into the neck;
• and
• a tamperproof strip detachably joining said cap portion to said ring portion all around the perimeter of the cap portion except at said hinge;
• where said entire skirt projects from said bearing surface over a length greater than a distance between the lower side of the flange and the upper edge of the neck, and said hinge is off-set relative to said annular bearing surface toward said ring portion by an amount at least equal to said distance.

A closure and a container, said container including a neck with an upper edge and a single external flange having a lower side located at a distance below the upper edge, said closure comprising:

• a ring portion having an inside bead for attaching it by snapping below said single external flange of the container neck;
• a cap portion for closing the container neck, said cap portion having a perimeter and joined by a hinge to said ring portion at one point of said perimeter, said cap portion comprising an upper disc member defining a lower annular bearing surface for bearing on the upper edge of the container neck and surrounding an annular sealing skirt having a substantially uniform length projecting downwardly from said bearing surface of said disc member for fitting into the container neck;
• and
• a tamperproof strip detachably joining said cap portion to said ring portion all around the perimeter of the cap portion except at said hinge;
• where said skirt projects from said bearing surface over a length at least equal to said distance between the lower side of the flange and the upper edge of the container neck, said hinge is offset relative to said annular bearing surface towards said ring portion by an amount at least equal to said distance, said sealing skirt has an outside surface exhibiting a cross-sectional circular shape and the cap portion has a circular perimeter, and the outside surface of the skirt is offset toward the hinge relative to the perimeter of the cap portion and said closure is a one piece molded assembly.