Lightweight plastic container and preform

Patent metadata

Field	Value
Publication number	US-11939104-B2
Application number	US-202318377493-A
Country	US
Kind code	B2
Filing date	Oct 6, 2023
Priority date	May 16, 2007
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A plastic container includes a hollow body portion including a lower supporting base portion; a sidewall portion extending upwardly from the base portion; and a neck portion extending upwardly from the sidewall portion. The neck portion includes a support flange having an upper and lower surface, at least one thread, and a dispensing opening at the top of the neck portion. In embodiments, a closure may be provided to form an assembly. A preform and method for making a container are also disclosed.

First claim

What is claimed is:

1. A method for blow molding a plastic container from a plastic preform, the plastic container comprising:
a lower supporting base portion;
a sidewall portion extending upwardly from the base portion; and
a neck portion extending upwardly from the sidewall portion, the neck portion including:
a dispensing opening positioned at a top of the neck portion;
threads positioned below the dispensing opening;
a tamper-evident formation positioned directly below the threads, the tamper-evident formation having a lower surface; and
a support flange positioned below the tamper-evident formation, the support flange having an upper surface and a lower surface;

wherein the plastic container is formed of a material comprising polyethylene terephthalate (PET); and a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.425 to 0.500 inches.

2. The method according to claim 1 , wherein a vertical distance from the top of the neck portion to a lower surface of the tamper-evident formation is from 0.30 to 0.31 inches.

3. The method according to claim 1 , wherein a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.435 to 0.500 inches.

4. The method according to claim 1 , wherein a vertical distance from the lower surface of the tamper-evident formation to the lower surface of the support flange is from 0.125 to 0.150 inches.

5. The method according to claim 1 , wherein a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.450 to 0.500 inches.

6. The method according to claim 1 , wherein the threads comprise non-vented threads.

7. The method according to claim 1 , wherein a vertical distance from the upper surface of the support flange to the top of the neck portion is from 0.40 to 0.50 inches.

8. The method according to claim 1 , wherein the plastic container is filled with water.

9. The method according to claim 1 , wherein the threads comprise multiple-lead threads.

10. The method according to claim 9 , wherein the threads comprise triple-lead threads.

11. A method for blow molding a plastic container from a plastic preform, the plastic container comprising:
a lower supporting base portion;
a sidewall portion extending upwardly from the base portion; and
a neck portion extending upwardly from the sidewall portion, the neck portion including:
a dispensing opening positioned at a top of the neck portion;
threads positioned below the dispensing opening;
a tamper-evident formation positioned below the threads, the tamper-evident formation having a lower surface; and
a support flange positioned below the tamper-evident formation, the support flange having an upper surface and a lower surface;

wherein the plastic container is formed of a material comprising polyethylene terephthalate (PET); a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.425 to 0.500 inches; and an outside diameter of the support flange is greater than 22 mm and less than or equal to 39.2 mm.

12. The method according to claim 11 , wherein a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.435 to 0.500 inches.

13. The method according to claim 11 , wherein a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.425 to 0.450 inches.

14. The method according to claim 11 , wherein a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.450 to 0.500 inches.

15. The method according to claim 11 , wherein the threads comprise non-vented threads.

16. The method according to claim 11 , wherein a vertical distance from the upper surface of the support flange to the top of the neck portion is from 0.40 to 0.50 inches.

17. The method according to claim 11 , wherein the plastic container is filled with water.

18. The method according to claim 11 , wherein a vertical distance from the lower surface of the tamper-evident formation to the lower surface of the support flange is from 0.125 to 0.150 inches.

19. The method according to claim 11 , wherein the threads comprise multiple-lead threads.

20. The method according to claim 19 , wherein the threads comprise triple-lead threads.

21. A method for blow molding a plastic container from a plastic preform, the plastic container comprising:
a lower supporting base portion;
a sidewall portion extending upwardly from the base portion; and
a neck portion extending upwardly from the sidewall portion, the neck portion including:
a dispensing opening positioned at a top of the neck portion;
threads positioned below the dispensing opening;
a tamper-evident formation positioned below the threads, the tamper-evident formation having a lower surface; and
a support flange positioned below the tamper-evident formation, the support flange having an upper surface and a lower surface;

wherein the plastic container is formed of a material comprising polyethylene terephthalate (PET); and a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.435 to 0.500 inches.

22. The method according to claim 21 , wherein a vertical distance from the lower surface of the tamper-evident formation to the upper surface of the support flange is from 0.08 to 0.09 inches.

23. The method according to claim 21 , wherein a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.450 to 0.500 inches.

24. The method according to claim 21 , wherein the threads comprise non-vented threads.

25. The method according to claim 21 , wherein a vertical distance from the upper surface of the support flange to the top of the neck portion is from 0.40 to 0.50 inches.

26. The method according to claim 21 , wherein the plastic container is filled with water.

27. The method according to claim 21 , wherein the threads comprise multiple-lead threads.

28. The method according to claim 27 , wherein the threads comprise triple-lead threads.

29. A method for blow molding a plastic container from a plastic preform, the plastic container comprising:
a lower supporting base portion;
a sidewall portion extending upwardly from the base portion; and
a neck portion extending upwardly from the sidewall portion, the neck portion including:
a dispensing opening positioned at a top of the neck portion;
threads positioned below the dispensing opening;
a tamper-evident formation positioned below the threads, the tamper-evident formation having a lower surface; and
a support flange positioned below the tamper-evident formation, the support flange having an upper surface and a lower surface;

wherein the plastic container is formed of a material comprising polyethylene terephthalate (PET); a vertical distance from the lower surface of the support flange to the top of the neck portion is from 0.425 to 0.450 inches.

Assignees

• Plastipak Packaging Inc

Inventors

• Darr Richard C
• Morgan Edward V

Classifications

• B29C49/08

  Biaxial stretching during blow-moulding · CPC title

• B29C49/0872

  axial stretch ratio · CPC title

• B65D1/0246 Primary

  Closure retaining means, e.g. beads, screw-threads · CPC title

• B29B11/08

  Injection moulding · CPC title

• B29B11/14

  characterised by structure or composition · CPC title