Patent ID: 6637611
Filing Date: 2003-10-28
Classification: B65D

Abstract:
In combination, a container neck and a container closure,said neck having an upper opening, a downward extending neck stretch portion below said opening, said neck stretch portion having an exterior, at least one first helical engagement means around said exterior of said neck stretch portion, said at least one first helical engagement means having a lower surface, a locking wall portion below said neck stretch portion, at least one first tooth on said locking wall portion, said closure having a top, said top having an underside, a plug disposed centrally of said underside of said top dimensioned to fit inside said upper opening, a downward extending upper skirt portion depending from said top, said upper skirt portion having an interior, at least one second helical engagement means around said interior of said upper skirt portion shaped to mate with said at least one first helical engagement means, said at least one second helical engagement means having an upper surface, a lower skirt portion below said upper skirt portion, frangible means joining said upper and lower skirt portions together, at least one second tooth on said lower skirt portion shaped to engage said at least one first tooth to prevent unscrewing of said closure relative to said neck without breaking said frangible means, said at least one first and second helical engagement means being shaped to slip over each other upon direct axial downward movement of said closure on said neck without relative rotation of said closure and said neck and then to interengage, said plug having a contact point located on said plug where said plug first engages said neck opening when said closure is applied to said neck, said contact point and said upper surface of said at least one second helical engagement means being separated by a maximum vertical distance, a top of said neck opening and said lower surface of said at least one first helical engagement means being separated by a minimum vertical distance, said maximum vertical distance between said contact point and said upper surface of said at least one second helical engagement means is greater than said minimum vertical distance between said top of said neck opening and said lower surface of said at least one first helical engagement means, thereby ensuring engagement of said at least one first and second helical engagement means prior to contact between said plug and said neck opening.