Containers

Claim 1

A container having an opening surrounded by a rim, screw threads on the exterior of the container adjacent to but below said rim, a closure member having a cover part engageable with the rim of the container and a depending annular skirt having a substantially uniform, straight, vertical outer surface extended between the cover part and the lower edge of said skirt, screw threads on the interior of said skirt engageable with the screw threads on said container, a plurality of radially outwardly extending ratchet teeth on said container below the screw threads thereof, a plurality of radially inwardly extending ratchet teeth on a portion of the skirt of the closure member adjacent the lower edge thereof, said ratchet teeth being arranged to engage and prevent unscrewing of said closure member when the latter has been screwed to a position wherein the cover part is seated on the rim of said container, a plurality of circumferentially spaced perforations around said closure member extending through said skirt between the threads thereof and the portion containing the teeth of said closure member, said perforations defining a tearable line of weakness, and tab means integral with said portion of said closure member skirt carrying said teeth for enabling said portion to be manually torn free of the skirt of the closure member along the line of said perforations after said closure member has been screwed into a closing position on said container, thereby enabling said closure member to be unscrewed in an opening direction.