Patent ID: 7735664
Filing Date: 2010-06-15
Classification: B65D

Abstract:
1. A neck finish for a container, the neck finish comprising: a substantially cylindrical exterior wall surface surrounding an orifice defined in the container, the cylindrical exterior wall surface having a substantially constant effective exterior wall diameter; a thread structure positioned about a section of the exterior wall surface, said thread structure having at least one single thread extending entirely around the exterior wall surface, the at least one single thread having at least a first portion, a second portion, positioned substantially axially below the first portion, and a third portion positioned substantially axially below the second portion, the first, second, and third portions, being inclined with respect to the other portions to provide a screw on neck finish, the first, second, and third portions further having a corresponding effective maximum diameter, and wherein the effective maximum diameter of said first portion is less than the effective maximum diameter of said second portion defining a first to second separation distance and the effective maximum diameter of said second portion is less than the effective maximum diameter of said third portion defining a second to third separation distance, whereby the effective maximum diameter of the thread structure changes throughout the section of the exterior wall surface.