초록 ▼

An injection molded plastic closure having a tamper indicating portion. The tamper indicating portion includes a tampering indicating band which is attached to the skirt for radially outward hinging by a plurality of bridges. The tamper indicating band is subject to splitting whereby it may expand o

An injection molded plastic closure having a tamper indicating portion. The tamper indicating portion includes a tampering indicating band which is attached to the skirt for radially outward hinging by a plurality of bridges. The tamper indicating band is subject to splitting whereby it may expand outwardly and clear a container neck finish. The tamper indicating band remains attached to the closure and the splitting thereof indicates tampering. Bridges attaching the tamper indicating band to the closure skirt are of sufficient cross section to have the required structural strength to prevent separation of the tamper indicating band from the closure skirt and at the same time permit injected molten plastic to freely flow from the closure skirt into the tamper indicating band. The tamper indicating band carries a plurality of locking flaps which are attached thereto by hinges which are defined by external areas of weakness which are shaped to be defined by a mold member which does not interlock with the closure and provides for ease of stripping.

대표청구항 ▼

A molded plastic closure comprising an inverted cup-shaped part including a skirt and an end panel, means for attachment to a container carried by said skirt, and tamper indicating means carried by said skirt in depending relation, said tamper indicating means including a tamper indicating band perm

A molded plastic closure comprising an inverted cup-shaped part including a skirt and an end panel, means for attachment to a container carried by said skirt, and tamper indicating means carried by said skirt in depending relation, said tamper indicating means including a tamper indicating band permanently hingedly connected to said skirt, for radially outward expansion, said tamper indicating band having formed therein at least one axial line of weakening forming means wherein said tamper indicating band is subject to axial splitting and radial expansion in response to radially outwardly directed forces, and a plurality of separate flaps hingedly connected to said tamper indicating band remote from said skirt, hinge connections between said flaps and said tamper indicating band permitting generally reverse folding of said flaps from a downwardly directed position to an upstanding position whereby free edges of said flaps may engage a retaining bead on a container neck finish and swing towards a transverse intermediate position during removal of said closure hinging said tamper indicating band radially outwardly to permit complete removal of said closure.