Pressure relief blow-out plugs and related packages

Patent metadata

Field	Value
Publication number	US-11975904-B2
Application number	US-202318108880-A
Country	US
Kind code	B2
Filing date	Feb 13, 2023
Priority date	Jul 2, 2021
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

Pressure relief blow out plugs for a container are disclosed as well as methods of using the same. One disclosed method involves providing a glass container that comprises a base and a body extending away from the base. The base includes a wall that defines a pressure relief passage. The method also involves inserting a pressure relief blow out into the pressure relief passage to seal the passage. The plug comprises a first inboard flange extending radially outwardly from the plug body, a stem, and a second inboard flange extending radially outwardly from the plug body and being spaced apart from the first inboard flange by a stem. The first inboard flange includes a first outboard sealing surface that provides an axial seal against the wall of the base of the glass container, and the second inboard flange including a circumferentially interrupted outboard facing retention portion the defines vent gaps.

First claim

The invention claimed is:

1. A method comprising:
providing a glass container that comprises a base and a body extending away from the base, the base of the glass container including a wall that has an interior surface and an exterior surface, and wherein the wall defines a pressure relief passage extending between the interior and exterior surfaces of the wall; and
inserting a pressure relief blow out plug into the pressure relief passage to seal the passage, the pressure relief blow out plug comprising a plug body, a first inboard flange extending radially outwardly from the plug body, a stem, and a second inboard flange extending radially outwardly from the plug body and being spaced apart from the first inboard flange by the stem, wherein the first inboard flange includes a first outboard sealing surface that provides an axial seal against the interior surface of the wall of the base of the glass container, and wherein the stem extends longitudinally away from the first inboard flange within the glass container to the second inboard flange, the second inboard flange including a circumferentially interrupted outboard facing retention portion that defines vent gaps.

2. The method set forth in claim 1 , further comprising:
introducing a liquid into the glass container after inserting the pressure relief blow out plug into the pressure relief passage; and
internally pressuring the glass container.

3. The method set forth in claim 1 , wherein the glass container further includes a shoulder extending away from the body and a neck extending away from the shoulder, the neck of the container terminating in a neck finish having an open mouth.

4. The method set forth in claim 1 , wherein the pressure relief passage is defined by a circumferential passage surface of the wall.

5. The method set forth in claim 4 , wherein the pressure relief passage is tapered such that a diameter of the passage increases along an axial direction from the interior surface of the wall to the exterior surface of the wall.

6. The method set forth in claim 4 , wherein the pressure relief passage is reverse tapered such that a diameter of the passage decreases along an axial direction from the interior surface of the wall to the exterior surface of the wall.

7. The method set forth in claim 4 , wherein the pressure relief passage is of straight cylindrical shape.

8. The method set forth in claim 1 , wherein the plug body of the pressure relief blow out plug further includes at least one external rib disposed within the pressure relief passage and in contact with a circumferential passage surface defined by the wall of the base of the container.

9. The method set forth in claim 1 , wherein the pressure relief blow out plug further includes a head positioned exterior to the glass container and which contacts the exterior surface of the wall of the base of the glass container.

10. The method set forth in claim 1 , wherein the glass container has a longitudinal axis extending centrally through the base of the glass container, and wherein the pressure relief passage axis has a longitudinal passage axis that is colinear with the longitudinal axis of the glass container.

11. A method comprising:
providing a glass container that comprises a base and a body extending away from the base, the base of the glass container including a wall that has an interior surface and an exterior surface, and wherein the wall defines a pressure relief passage extending between the interior and exterior surfaces of the wall; and
inserting a pressure relief blow out plug into the pressure relief passage to seal the passage, the pressure relief blow out plug comprising a plug body, a first inboard flange extending radially outwardly from the plug body, a stem, and a second inboard flange extending radially outwardly from the plug body and being spaced apart from the first inboard flange within the glass container by the stem, wherein the first inboard flange includes a first outboard sealing surface that provides an axial seal against the interior surface of the wall of the base of the glass container, and wherein the second inboard flange includes an outboard facing retention portion having a plurality of bosses that extend axially toward the first inboard flange and are circumferentially spaced apart by vent gaps.

12. The method set forth in claim 11 , wherein the plug body of the pressure relief blow out plug further includes at least one external rib disposed within the pressure relief passage and in contact with a circumferential passage surface defined by the wall of the base of the container.

13. The method set forth in claim 11 , wherein the pressure relief blow out plug further includes a head positioned exterior to the glass container and which contacts the exterior surface of the wall of the base of the glass container.

14. The method set forth in claim 11 , further comprising:
introducing a liquid into the glass container after inserting the pressure relief blow out plug into the pressure relief passage; and
internally pressuring the glass container to a pressure below a predetermined threshold pressure at which the pressure relief blow out plug is displaced through the pressure relief passage to bring the outboard facing retention portion of the second inboard flange into contact with the interior surface of the wall of the base of the glass container.

15. The method set forth in claim 11 , wherein the glass container further includes a shoulder extending away from the body and a neck extending away from the shoulder, the neck of the container terminating in a neck finish having an open mouth.

Assignees

• Owens Brockway Glass Container

Inventors

• Hoadley David
• Jones Trent

Classifications

• B65D77/225 Primary

  Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element · CPC title

• B65D1/023

  Neck construction · CPC title

• B65D1/20

  characterised by location or arrangement of filling or discharge apertures · CPC title

• B65D51/1672

  whereby venting occurs by manual actuation of the closure or other element · CPC title

• B65D77/06

  Liquids or semi-liquids {or other materials or articles} enclosed in flexible containers disposed within rigid containers · CPC title