Plastic container neck configured for use with a fitment

摘要

An apparatus is provided in the form of a neck for a plastic bottle or other plastic container. The neck includes an external thread with a constant major diameter that can engage with a bottle cap with an internal thread. The neck has an internal surface with an irregular shape where the internal diameter proximate to the top sealing surface is greater than the internal diameter proximate to the side wall of the plastic bottle. The internal surface of the neck engages with a fitment inserted into the neck of the plastic container to prevent movement of the fitment.

主权项

1. A neck for a plastic container, wherein the neck extends a distance along a vertical axis, the neck comprising:
a top sealing surface; at least one thread, wherein the thread has a major diameter that remains constant over the distance of the neck, and wherein the thread has a minor diameter that decreases along the distance of the neck, with the minor diameter greatest adjacent to the top sealing surface; a layer of material of substantially constant thickness having an internal surface and an external surface, wherein the layer of material has an irregular internal diameter with the internal diameter adjacent to the top sealing surface being greater than the internal diameter adjacent to a shoulder, wherein the layer of material is integrally formed with the top sealing surface and the at least one thread, and is joined to a sidewall of the plastic container; and the shoulder formed by the internal surface of the layer of material adjacent to the sidewall of the plastic container, wherein the shoulder is configured to inhibit movement of a fitment inserted into the neck of the plastic container, wherein the fitment is comprised of a skirt connecting an upper flange and a lower flange.