Patent ID: 6877624
Filing Date: 2005-04-12
Classification: B29C,B29L,B65D

Abstract:
1. A container closure for a container comprising: a top positioned generally in a common top plane; an annular side wall extending from the top, the side wall having an internal thread positioned at a pitch angle relative to the common top plane and adapted to engage with threads of the container around a container opening; and a tamper-evident portion on a lower portion of the side wall, the tamper-evident portion including a plurality of leaders extending across a score line to a lower band, the lower band including a substantially continuous internal projection below the leaders, wherein the projection includes an angled portion for a portion of a circumference of the tamper-evident portion, the angled portion positioned at a pitch angle relative to the common top plane and forming a one-way lead-in helical thread for the projection, wherein the one-way lead-in thread formed by the angled portion has the pitch extending in a same direction as the internal thread of the annular side wall, whereby the one-way lead-in thread formed by the angled portion allows the projection of the tamper-evident portion to be threaded past a retaining ridge of a container.