Two-Piece Cap

Abstract

A 2-piece closure includes a cap having a first skirt perpendicular to, and extending downwardly from, a first circular top wall. The first skirt includes a groove and a first anti-rotation formation. A tamper band attaches to the first skirt by frangible members. A cap cover includes a second skirt extending downwardly from a second circular top wall. The second circular top wall and the second skirt define an interior having a groove engagement formation and a second anti-rotation formation. The cap cover encloses a portion of the cap, with the groove engagement formation and the groove engaged. The first and second anti-rotation formations interact to restrict rotation of the cap cover relative to the cap.

What is claimed is: 
     
         1 . A 2-piece closure configured to close a container having a container neck defining an opening to the container, the closure comprising:
 an axis;   a cap centered on the axis, the cap including a first circular top wall, a first skirt extending downwardly from a periphery of the first circular top wall to a lower edge of the first skirt, a second circular top wall extending from the lower edge of the first skirt radially away from the axis, an annular sidewall extending downward from the second circular top wall, a first detent coupled to the first circular top wall, and a first formation extending from an outer surface of the annular sidewall, the annular sidewall configured to interface against a container neck of a container to seal an opening of the container neck; and   a cap cover including a third circular top wall, a second skirt extending downwardly from a periphery of the third circular top wall, the third circular top wall and the second skirt defining an interior having a second detent and a second formation formed therein, the second detent configured to engage with the first detent, the second formation configured to engage with the first formation of the cap such that the cap is biased from rotating relative to the cap cover in both rotational directions as a result of the engagement between the second formation and the first formation, the cap cover enclosing at least a portion of the cap when the second detent is engaged with the first detent, the cap cover centered on the axis.   
     
     
         2 . The closure of  claim 1 , the cap cover including one or more mating detents extending downward from the second circular top wall, the one or more mating detents including the second detent, the one or more mating detents being radially further from the axis than the annular sidewall of the cap, and the one or more mating detents located above the second formation of the cap cover. 
     
     
         3 . The closure of  claim 2 , wherein the one or more mating detents circumferentially surround the first circular top wall of the cap. 
     
     
         4 . The closure of  claim 1 , the first circular top wall defining a first diameter and the third circular top wall defining a second diameter larger than the first diameter. 
     
     
         5 . The closure of  claim 1 , the cap comprising a tamper band attached to the annular sidewall by a plurality of frangible members, the plurality of frangible members providing a visual indication, when broken, that the closure has been opened. 
     
     
         6 . The closure of  claim 5 , wherein each of the plurality of frangible members are broken when the closure is opened. 
     
     
         7 . The closure of  claim 1 , wherein the first formation extends vertically along the outer surface of the cap. 
     
     
         8 . The closure of  claim 7 , wherein the second formation extends vertically along the interior of the second skirt. 
     
     
         9 . The closure of  claim 8 , the cap cover including one or more mating detents extending downward from the second circular top wall, the one or more mating detents including the second detent, the one or more mating detents being radially further from the axis than the annular sidewall of the cap, and the one or more mating detents located above the second formation of the cap cover. 
     
     
         10 . The closure of  claim 1 , the cap including a first plurality of formations formed on the outer surface, the first plurality of formations including the first formation, each of the first plurality of formations extending vertically along the outer surface. 
     
     
         11 . The closure of  claim 10 , the cap cover including a second plurality of formations formed on the interior of the second skirt, the second plurality of formations including the second formation, wherein two or more of the first plurality of formations engage with two or more of the second plurality of formations such that the cap is biased from rotating relative to the cap cover in both rotational directions as a result of the engagement. 
     
     
         12 . The closure of  claim 10 , wherein the first plurality of formations are spaced evenly around a circumference of the first skirt. 
     
     
         13 . A 2-piece closure configured to close a container having a container neck portion defining an opening to the container, the closure comprising:
 an axis;   a cap centered on the axis, the cap including a first wall centered on the axis, a first skirt extending downwardly from a periphery of the first wall to a lower edge of the first skirt, a second wall extending from the lower edge of the first skirt away from the axis, an annular sidewall extending downward from the second wall, a first detent coupled to the first wall, and a first formation extending from an outer surface of the annular sidewall, the annular sidewall configured to interface against a container neck of a container to seal an opening of the container neck; and   a cap cover including a third wall, a second skirt extending downwardly from a periphery of the third wall, the third wall and the second skirt defining an interior having a second detent and a plurality of fins formed therein, the second detent configured to engage with the first detent, one or more of the plurality of fins configured to engage with the first formation of the cap such that the cap is biased from rotating relative to the cap cover in both rotational directions as a result of the engagement between the one or more of the plurality of fins and the first formation, the cap cover enclosing at least a portion of the cap when the second detent is engaged with the first detent, the cap cover centered on the axis.   
     
     
         14 . The closure of  claim 13 , the first wall defining a first diameter and the third wall defining a second diameter larger than the first diameter. 
     
     
         15 . The closure of  claim 13 , the cap comprising a tamper band attached to the annular sidewall by a plurality of frangible members, the plurality of frangible members providing a visual indication, when broken, that the closure has been opened. 
     
     
         16 . The closure of  claim 13 , the cap cover including one or more mating detents extending downward from the second wall, the one or more mating detents including the second detent, the one or more mating detents being radially further from the axis than the annular sidewall of the cap, and the one or more mating detents located above the plurality of fins. 
     
     
         17 . The closure of  claim 13 , the cap including a first plurality of formations formed on the outer surface, the first plurality of formations including the first formation, each of the first plurality of formations extending vertically along the outer surface, wherein two or more of the first plurality of formations engage with two or more of the plurality of fins such that the cap is biased from rotating relative to the cap cover in both rotational directions as a result of the engagement. 
     
     
         18 . A 2-piece closure configured to close a container having a container neck portion defining an opening to the container, the closure comprising:
 an axis;   a cap centered on the axis, the cap including a first wall centered on the axis, a first skirt extending downwardly from a periphery of the first wall to a lower edge of the first skirt, a second wall extending from the lower edge of the first skirt away from the axis, an annular sidewall extending downward from the second wall, a first detent coupled to the first wall, and a first formation extending from an outer surface of the annular sidewall, the annular sidewall configured to interface against a container neck of a container to seal an opening of the container neck, the cap including a tamper band attached to the lower edge of the annular sidewall by a plurality of frangible members, the plurality of frangible members providing a visual indication, when broken, that the closure has been opened; and   a cap cover including a second circular top wall, a second skirt extending downwardly from a periphery of the second circular top wall, the second circular top wall and the second skirt defining an interior having a second detent and a plurality of fins formed therein, the second detent configured to engage with the first detent, the plurality of fins configured to engage with the plurality of recesses of the cap such that the cap is biased from rotating relative to the cap cover in both rotational directions as a result of the engagement between the plurality of fins and the first formation, the cap cover enclosing at least a portion of the cap when the first detent is engaged with the second detent, the cap cover centered on the axis, the plurality of fins comprising at least four groups of at least one fin each, the at least four groups circumferentially spaced apart from each other with respect to the axis.   
     
     
         19 . The closure of  claim 18 , the cap including a first plurality of formations formed on the outer surface, the first plurality of formations including the first formation, each of the first plurality of formations extending vertically along the outer surface, wherein two or more of the first plurality of formations engage with two or more of the plurality of fins such that the cap is biased from rotating relative to the cap cover in both rotational directions as a result of the engagement. 
     
     
         20 . The closure of  claim 18 , the cap cover including one or more mating detents extending downward from the second circular top wall, the one or more mating detents including the second detent, the one or more mating detents being radially further from the axis than the annular sidewall of the cap, and the one or more mating detents located above the plurality of fins.