A Closure Assembly And Container Provided With Such A Closure Assembly

A closure assembly comprising:

• an article forming a tubular neck and having a product passage extending through said neck, said neck having a vertical axis and forming a mouth at a top end of said product passage, said neck having an interior side and an exterior side,
• a rotational cap having a unitary cap body that is injection molded of plastic material and that is secured on or to be secured on said neck of the article, the cap sealing the product passage in a closed position of the cap on said neck, and the cap, for removal of the cap from the neck of the article by a user to open the product passage, being adapted to be manually rotated from the closed position in an opening direction,
• wherein the unitary cap body comprises an annular top wall having an inner perimeter and an outer perimeter, a downward depending skirt integral with said outer perimeter, and a hollow pin portion downward depending from said inner perimeter, said hollow pin portion having a circumferential face extending along a length thereof and having a closed pin bottom,
• wherein the circumferential face of the hollow pin portion and the article have at least one pair of cooperating sealing surfaces such that hollow pin portion, in a closed position of the cap, closes the product passage,
• wherein said skirt of the cap body has an interior side and an exterior side,
• wherein the cap furthermore comprises an integrally molded tamper-evident structure at the bottom end of the skirt which is adapted to evidence a first time opening of the cap,
• wherein said hollow pin portion extends from the annular top wall downward at least to a level of the tamper-evident structure,
• wherein
• the cap is a quarter-turn cap, wherein the neck is provided with two integrally molded and diametrically opposed, outwardly protruding retention members for the cap, wherein the skirt of the cap is provided, in a region above the tamper-evident structure, with two diametrically opposed windows that each extend through the skirt, each window being embodied to receive a retention member therein so as to axially retain the cap on the neck,
• and wherein the skirt of the cap has, at a level of said windows, a pair of diametrically opposed enlarged inner space portions each delimiting an inner space such that, upon a quarter turn rotation of the cap in said opening direction by a user, the enlarged inner space portions align with the retention members as the retention members each move out of the respective window,
• and wherein
• the bottom end of the skirt has a pair of diametrically opposed static cover portions separated from one another by a pair of diametrically opposed and open bottomed notches in said skirt,
• each of said static cover portions forming a sector of a lower edge of the skirt and having a leading rim and a trailing rim, seen in opening direction of the cap,
• wherein each notch is defined by an upper notch rim and by the trailing rim of one of the static cover portions and the leading rim of the other of the static cover portions,
• wherein in each notch an indicator segment of the tamper-evident structure is located,
• wherein each indicator segment is integrally molded to said upper notch rim by a non-frangible hinge, and wherein each indicator segment (41,42) is integrally molded to each of said leading rim and said trailing rim via at least one-respective frangible bridge,
• wherein each indicator segment has an inner face, and wherein the exterior side of the neck has for each indicator segment an integrally molded boss, said boss being engageable with the inner face of said segment,
• and wherein each boss is adapted to engage on said inner face of a respective indicator segment such that, upon a first time opening of the cap by a quarter turn rotation in said opening direction, the indicator segments are each forced outwardly by the respective boss such that each of said indicator segments pivots about said non-frangible hinge and said frangible bridges break, thereby said outwardly pivoted indicator segments and said broken frangible bridges evidencing the first time opening of the cap.