Plastic container with threaded neck finish

Patent metadata

Field	Value
Publication number	US-2015375886-A1
Application number	US-201514751463-A
Country	US
Kind code	A1
Filing date	Jun 26, 2015
Priority date	Jun 26, 2014
Publication date	Dec 31, 2015
Grant date	—

Abstract

A plastic container includes a neck portion, a sidewall portion, and a base portion. The neck portion includes a plurality of threads, which may be configured to retain and/or secure a cap or lid. In embodiments, the threads may be blown and/or the neck portion may include a neck rib provided vertically above the threads.

First claim

What is claimed is:

1 . A plastic container comprising:
a neck portion, the neck portion including an opening and a plurality of threads disposed vertically below the opening; a sidewall portion extending below the neck portion; and a base portion extending below the sidewall portion; wherein each of the plurality of threads include a first portion and a second portion, the first portion is provided at a first angle relative to a centerline of the plastic container, the second portion is provided at a second angle relative to the centerline of the container, and the first angle and second angle are different.

2 . The plastic container of claim 1 , wherein the plurality of threads are blow molded.

3 . The plastic container of claim 1 , wherein the plurality of threads are injection molded.

4 . The plastic container of claim 1 , wherein the plastic container is comprised of polyethylene terephthalate (PET), polyethylene (PE), or polypropylene (PP).

5 . The plastic container of claim 1 , wherein the plastic container is comprised of a blend of two or more polymers.

6 . The plastic container of claim 1 , wherein the first angle is greater than the second angle.

7 . The plastic container of claim 1 , wherein the second portion extends vertically downward to an extent that a portion of the second portion is visible when a cap or lid is secured to the container by the plurality of threads.

8 . The plastic container of claim 1 , wherein the outer diameter of the neck portion is at least about five times greater than the vertical distance of the neck portion.

9 . The plastic container of claim 1 , wherein an uppermost portion of the first portion of the threads is offset from an uppermost portion of the container by a vertical distance that is about one-third of the total vertical distance of the neck portion.

10 . The plastic container of claim 1 , wherein an uppermost portion of the first portion of the threads is offset from an uppermost portion of the container by a vertical distance of about 5.24 mm.

11 . The plastic container of claim 1 , wherein the total height of the container is the same or within one percent of the greatest diameter of the container.

12 . The plastic container of claim 1 , wherein the total height of the container is within three percent of the greatest diameter of the container.

13 . The plastic container of claim 1 , wherein the total height of the container is within five percent of the greatest diameter of the container.

14 . The plastic container of claim 1 , including one or more horizontally-extending straps or grooves.

15 . The plastic container of claim 1 , wherein the container is heat treated or heat set.

16 . The plastic container of claim 1 , wherein the container includes one or more barrier materials.

17 . The plastic container of claim 16 , wherein the one or more barrier materials comprises an oxygen scavenging material.

18 . The plastic container of claim 1 , wherein the base portion includes a plurality of radially extending ribs.

19 . The plastic container of claim 1 , wherein the neck portion includes a recess provided an inside wall of at least one of the plurality of threads.

20 . The plastic container of claim 19 , wherein, viewed in cross-section, the recess is generally a symmetrical curve.

21 . The plastic container of claim 1 , wherein, when viewed in cross-section, each of the plurality of threads includes comprises a first segment, a second segment, and a third segment, with each segment having a different curvature.

22 . The plastic container of claim 21 , wherein the first segment and third segment are generally provided at an angle of about 60 degrees relative to the center line of the container.

23 . The plastic container of claim 21 , wherein the first segment and third segment are generally provided at an angle of about 30±15 degrees relative to the center line of the container.

24 . The plastic container of claim 21 , wherein the second segment includes a portion that is substantially parallel to the center line of the container.

25 . The plastic container of claim 1 , wherein a cross-sectional shape of each of the plurality of threads is not symmetrical.

26 . The plastic container of claim 1 , wherein several segments of each of the plurality of threads includes different radiuses of curvature.

27 . The plastic container of claim 1 , wherein the plurality of threads comprise less than eight threads.

28 . The plastic container of claim 1 , wherein the plurality of threads comprise eight or more threads.

29 . The plastic container of claim 1 , wherein the neck portion includes a neck rib provided above the plurality of threads.

30 . The plastic container of claim 1 , wherein the opening has a diameter between about 63 mm to about 82 mm.

31 . The plastic container of claim 1 , wherein the opening has a diameter greater than 82 mm.

32 . A method for making a plastic container, comprising:
providing a plastic preform; blow molding the preform into an intermediate article that includes a neck portion with a plurality of blown threads, wherein each of the plurality of blown threads include a first portion and a second portion, the first portion is provided at a first angle relative to a centerline of the intermediate article, the second portion is provided at a second angle relative to the centerline of the intermediate article, and the first angle and second angle are different. removing an upper portion of the intermediate article.

33 . The method of claim 32 , including heat treating the plastic container.

Assignees

• Plastipak Packaging Inc

Inventors

• Kraft Phil
• Dauzvardis Matt

Classifications

• B65D2501/0036

  Hollow circonferential ribs · CPC title

• B65D81/266

  for absorbing gases, e.g. oxygen absorbers or desiccants (B65D51/244, B65D51/30 take precedence) · CPC title

• B65D81/2015

  in an at least partially rigid container (B65D81/2038 takes precedence) · CPC title

• B29K2067/003

  PET, i.e. poylethylene terephthalate · CPC title

• B29K2023/06

  PE, i.e. polyethylene · CPC title