Low migration container

Patent metadata

Field	Value
Publication number	US-11713166-B2
Application number	US-201917312076-A
Country	US
Kind code	B2
Filing date	Nov 13, 2019
Priority date	Dec 17, 2018
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A container comprising a container body having a neck, the neck having inner and outer surfaces and a rim extending between tops of the inner and outer surfaces, and the rim defining a circular opening. The closure has a centre panel, the closure defining an annular channel. An annular gasket is disposed in the annular channel and the annular channel receives said rim of said neck such that the annular gasket forms a seal between said rim and said closure. When the container body is closed by the closure, the difference between an inside radius of the annular channel at a channel depth of 0.2 mm and an inside radius of said rim is less than substantially 0.9 mm.

First claim

The invention claimed is:

1. A container comprising:
a container body having a neck, the neck having inner and outer surfaces and a rim extending between tops of the inner and outer surfaces, and the rim defining a circular opening; and
a closure having a centre panel, the closure defining an annular channel, and an annular gasket disposed in the annular channel, the annular channel receiving said rim of said neck such that the annular gasket forms a seal between said rim and said closure,
wherein, when the container body is closed by the closure, the difference between an inside radius of the annular channel at a channel depth of 0.2 mm and an inside radius of said rim is less than 0.7±0.225 mm; and
wherein when the container body is closed by the closure, a portion of the annular gasket is exposed to a volume enclosed by the container body, and a radial dimension of the exposed portion is less than 1.0±0.225 mm.

2. A container according to claim 1 , wherein an inside radius of the annular gasket is greater than a radius that is equal to said inside radius of said rim less 0.7±0.225 mm.

3. A container according to claim 1 , comprising a thread on the outer surface of the neck,
wherein the closure comprises a sidewall provided with lugs for engaging with said thread, and
wherein annular channel is defined in the closure between the centre panel and the sidewall.

4. A container according to claim 1 , wherein said rim comprises a substantially continuously curved region connected to one or both of the inner and outer surfaces by a lip or lips.

5. A container according to claim 1 , wherein, the inside radius of the annular gasket is greater than a radius that is equal to the inside radius of said rim less 0.6±0.225 mm.

6. A container according to claim 1 , wherein an inside radius of the annular channel at a channel depth of 0.2 mm is greater than a radius that is equal to an inside radius of said rim less 0.6±0.225 mm.

7. A container according to claim 1 , wherein the inside radius of the annular gasket is greater than the inside radius of the rim.

8. A container according to claim 1 , wherein, when the container body is closed by the closure, a first portion of the closure contacts said rim to limit exposure of the annular gasket to a volume enclosed by the container body, and wherein a portion of the annular gasket is exposed to the volume enclosed by the container body, and a radial dimension of the exposed portion is less than 0.1 mm.

9. A container according to claim 1 , wherein, when the container body is closed by the closure, the difference between the inside radius of the annular gasket and a radius at the centre of the rim is less than 2.1±0.225 mm.

10. A container according to claim 1 , wherein the mass of the annular gasket per mm of arc length of the annular gasket is less than 8 mg/mm or less than 6.4 mg/mm.

11. A container according to claim 3 wherein a lower end of the sidewall is curled inwardly and said lugs are formed by varying the radius of curvature of the curl around the circumference of the closure, wherein said annular gasket is formed of plastisol, and wherein said closure is a vacuum closure.

12. A container according to claim 1 wherein said annular gasket comprises a compression moulded thermoplastic elastomer.

13. A container comprising:
a container body having a neck, the neck having inner and outer surfaces and a rim extending between tops of the inner and outer surfaces, and the rim defining a circular opening, and a thread on the outer surface of the neck; and
a closure having a centre panel and a depending sidewall, the closure defining an annular channel between the centre panel and the sidewall, and an annular gasket disposed partially in the annular channel and partially on the inside of the sidewall for engaging with said thread, the annular channel receiving said rim of said neck such that the annular gasket forms a seal between said rim and said closure,
wherein, when the container body is closed by the closure, an inside radius of the annular gasket is greater than an inside radius of said rim; and
wherein the annular gasket extends over and engages with a thread on the outer surface of the neck thereby deforming to match the shape of the thread.

14. A container according to claim 13 , wherein said rim comprises a substantially flat upper surface region connected to one or both of the inner and outer surfaces by a lip or lips beneath said flat surface region.

15. A container according to claim 13 , wherein, when the container body is closed by the closure, a first portion of said annular channel is in direct mechanical contact with said rim to limit exposure of the annular gasket to a volume enclosed by the container body.

16. A container according to claim 15 , wherein a portion of the annular gasket is exposed to the volume enclosed by the container body, and a radial dimension of the exposed portion is less than 0.1 mm.

17. A container according to claim 13 , wherein said annular gasket is formed of plastisol.

18. A container according to claim 13 , wherein said annular gasket comprises a compression moulded thermoplastic elastomer.

19. A closure for closing the container body of claim 16 ,
wherein, when the closure closes the container body, the annular channel is arranged to receive a rim of a neck of the container body such that the annular gasket forms a seal between the rim the said closure an inside radius of the annular gasket is greater than an inside radius of said rim.

Assignees

• Crown Packaging Technology Inc

Inventors

• Avolio Salvatore
• Nadin Gerald
• Ramsey Christopher Paul

Classifications

• B65D41/0457 Primary

  the sealing element covering or co-operating with the screw-thread or the like of a container neck · CPC title

• B65D1/10

  Jars, e.g. for preserving foodstuffs {(B65D81/3837 takes precedence)} · CPC title

• B65D53/02

  Collars or rings · CPC title

• B65D41/0442 Primary

  Collars or rings (B65D41/0457 takes precedence) · CPC title