Patent ID: 6305579
Filing Date: 2001-10-23
Classification: B65D

Abstract:
A tamper indicating closure configured for snap-on or screw-on application to a container, said closure comprising:a. a top portion;b. an annular depending skirt extending from said top portion, said depending skirt having an internal thread configuration adapted for engaging an external thread configuration on the neck portion of said container by snap-on application during initial installation of said closure to said container neck;c. an annular valve depending from said top portion in spaced relation to said depending skirt; andd. a tamper indicating ring connected to said depending skirt by at least one circumferentially located frangible element;e. at least one arcuate projection extending around at least a portion of said tamper indicating ring arranged for registration with a container neck portion on which said closure is positioned;f. at least one member attached to said tamper-indicating ring which cooperates with at least one said arcuate projection to assist in breaking said tamper indicating ring during initial removal of said closure from said container neck;wherein at least one said arcuate projection is held in place by an annular locking flange on said container neck as said member is pulled away from said arcuate projection by twist-off removal of said annular depending skirt to cause said tamper indicating ring to break at a weakened area.