초록 ▼

A novel snap on pull off tamper indicating cap and neck configuration for containers, the cap having a top with an annular depending wall on its peripheral edge and seven circumferentially spaced continuous spiral thread configurations on the inner surface of the annular depending wall. A removable

A novel snap on pull off tamper indicating cap and neck configuration for containers, the cap having a top with an annular depending wall on its peripheral edge and seven circumferentially spaced continuous spiral thread configurations on the inner surface of the annular depending wall. A removable tear skirt with continuous opposing groups of ratchet teeth on its inner surface depends from the outer peripheral edge of an out-turned flange on said annular wall. An inturned continuous annular rib on said annular depending wall engages on and deforms the neck configuration. The tear skirt is joined to the flange with multiple frangible connections from the ratchet teeth, a pull tab on the tear skirt with frangible lines requiring removal of the tab and tear skirt from the cap before the cap can be rotated. The novel construction also enabling lead-in ends of the seven circumferentially spaced thread patterns on the depending wall to immediately engage the neck configuration having registering circumferentially spaced continuous spiral thread configurations on its exterior thereof.

대표청구항 ▼

In combination, a container and a closure therefor, said container having a cylindrical neck surrounding an opening therein, said neck having a first neck portion of a first diameter, a plurality of external teeth on said first neck portion, a second neck portion of a second diameter less than said

In combination, a container and a closure therefor, said container having a cylindrical neck surrounding an opening therein, said neck having a first neck portion of a first diameter, a plurality of external teeth on said first neck portion, a second neck portion of a second diameter less than said first diameter above said first neck portion, at least seven circumferentially and vertically spaced annular first spiral thread configurations on said second neck portion, each of said first spiral thread configurations extending in a helical path of continuous pitch around said second neck portion, each of said first spiral thread configurations having an upper end and a lower end, said lower end being circumferentially and axially spaced from said upper end, with the upper ends of each of said first spiral thread configurations forming circumferentially spaced lead-in points for the reception of said closure, each of said first spiral thread configurations having an arcuate extent around said second neck portion so that a vertical line drawn through said second neck portion at said upper ends intersects a plurality of said first spiral thread configurations, said closure having a top, an annular depending wall depending from said top, and at least seven circumferentially and vertically spaced annular second spiral thread configurations extending in a helical path of continuous pitch on the inner surface of said annular depending wall, a tear skirt positioned radially outwardly of said annular depending wall and frangibly joined thereto, and a plurality of internal teeth on said second neck portion, said second spiral thread configurations being engageable with said first spiral thread configurations and said internal teeth being engageable with said external teeth 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.