Snap on twist off tamper indicating flexible cap and neck configuration

A closure for a container of the type having a neck surrounding an opening therein, a first neck portion of a first diameter, a plurality of external teeth on the exterior of said first neck portion, a cylindrical neck portion of a second diameter less than said first diameter extending upwardly from said first neck portion, at least seven circumferentially and vertically spaced first spiral thread configurations extending in a helical path of continuous pitch around said cylindrical neck portion, each of said first spiral thread configurations having uppermost ends defining circumferentially spaced lead in points so as to form multiple means for registering engagement with said closure,

• said closure having a top, an annular wall depending from said top and having an outer diameter, at least seven circumferentially and vertically spaced second spiral thread configurations, said second spiral thread configurations extending in a helical path of continuous pitch on the inner surface of said annular wall, each said second spiral thread configuration having a first end and a second end, said second end circumferentially and axially spaced from said first end, said second spiral thread configurations each having an arcuate extent around said annular wall so that a plane defined by the central axis of said closure and said upper end of at least one of said second spiral thread configurations intersects a plurality of second spiral thread configurations, a tear skirt depending from said annular wall, said tear skirt having an inner diameter greater than said outer diameter of said annular wall, and a plurality of internal teeth on said tear skirt, said second spiral thread configurations being engageable with said first spiral thread configurations and said internal teeth being engageable with said external teeth when said closure is applied to said neck independent of the initial orientation of said closure relative to said neck, said second spiral thread configurations engaging said first spiral thread configurations and said internal teeth engaging said external teeth when said closure is substantially applied to said neck by pushing said closure onto said neck.

A container having a neck surrounding an opening therein, said neck having a first neck portion of a first diameter, a plurality of external teeth on the exterior of said first neck portion, a cylindrical neck portion of a second diameter less than said first diameter, said cylindrical neck portion extending upwardly from said first neck portion, at least seven circumferentially and vertically spaced first spiral thread configurations extending in a helical path of continuous pitch around said cylindrical neck portion, where said first spiral thread configurations each have an arcuate extent around said cylindrical neck portion so that a plane defined by the central axis of said neck and said upper end of at least one of said first spiral thread configurations intersects a plurality of first spiral thread configurations, each of said first spiral thread configurations having uppermost ends defining circumferentially spaced lead in points so as to form multiple means for registering engagement with a flexible closure of the type having a depending annular wall and at least seven circumferentially and vertically spaced second spiral thread configurations extending in a helical path of continuous pitch on the inner surface of said depending annular wall of said closure, each said second spiral thread configuration having a first end and a second end, said second end circumferentially and axially spaced from said first end, a tear skirt depending from and positioned radially outwardly of said depending annular wall, and a plurality of internal teeth on said tear skirt, said first spiral thread configurations on said neck being engageable with said second spiral thread configurations on said closure and said external teeth on said neck being engageable with said internal teeth on said closure independent of the initial orientation of said closure relative to said neck, said second spiral thread configurations engaging said first spiral thread configurations and said external teeth engaging said internal teeth when said closure is substantially applied to said neck by pushing said closure onto said neck.