Structure and method of sealing a closure assembly onto the neck finish of a plastic pressure container

Patent metadata

Field	Value
Publication number	US-2016288986-A1
Application number	US-201615088977-A
Country	US
Kind code	A1
Filing date	Apr 1, 2016
Priority date	Apr 1, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

Plastic pressure container including a main body portion, a finish portion, and a closure assembly. The main body portion defines an interior space. The finish portion is unitary with the main body portion and defines a mouth in communication with the interior space. The finish portion has an inner surface, an outer surface and an upper rim proximate the mouth. The inner surface has an inner undercut defined therein proximate the upper rim. The outer surface has an outer undercut defined therein proximate the upper rim. The closure assembly is mounted to the finish portion in engagement with both the inner undercut and the outer undercut.

First claim

1 . A plastic pressure container, comprising:
a main body portion defining an interior space; a finish portion unitary with the main body portion and defining a mouth in communication with the interior space, the finish portion having an inner surface, an outer surface and an upper rim proximate the mouth, the inner surface having an inner undercut defined therein proximate the upper rim, and the outer surface having an outer undercut defined therein proximate the upper rim; and a closure assembly mounted to the finish portion in engagement with both the inner undercut and the outer undercut.

2 . The plastic pressure container of claim 1 , wherein the main body portion and finish portion are fabricated from a material comprising polyethylene terephthalate.

3 . The plastic pressure container of claim 1 , wherein the main body portion and finish portion are fabricated from a material comprising polyethylene naphthalate and/or polyethylene furanoate.

4 . The plastic pressure container of claim 1 , wherein the inner undercut extends substantially along an entire inner circumference of the inner surface of the finish portion.

5 . The plastic pressure container of claim 1 , wherein the outer undercut extends substantially along an entire outer circumference of the outer surface of the finish portion.

6 . The plastic pressure container of claim 1 , further comprising a sealing member disposed between the finish portion and the closure assembly.

7 . The plastic pressure container of claim 6 , wherein the finish portion includes at least one rib disposed on the outer surface for engagement with the sealing member.

8 . The plastic pressure container of claim 6 , wherein the finish portion includes at least two ribs disposed on the outer surface for engagement with the sealing member.

9 . The plastic pressure container of claim 1 , wherein the finish portion defines a longitudinal axis, and wherein at least one of the inner undercut and the outer undercut defines an engagement surface substantially perpendicular to the longitudinal axis.

10 . The plastic pressure container of claim 1 , wherein the closure assembly is mounted to the finish portion by a crimped engagement.

11 . The plastic pressure container of claim 1 , wherein the closure assembly includes a valve.

12 . The plastic pressure container of claim 1 , further comprising an aerosol mixture comprising a propellant within the interior space.

13 . The plastic pressure container of claim 1 , further comprising a fluid in the interior space pressured between about 40 to 160 psi.

14 . A plastic pressure container comprising:
a main body portion defining an interior space; a finish portion unitary with the main body portion and defining a mouth in communication with the interior space, the finish portion having an inner surface, an outer surface and an upper rim proximate the mouth, the inner surface having an inner undercut defined therein proximate the upper rim, and the outer surface having an outer undercut defined therein proximate the upper rim; a closure assembly mounted to the finish portion in engagement with both the inner undercut and the outer undercut; and
contents in the interior space.

Assignees

• Graham Packaging Co

Inventors

• Patel Tapan Y
• Denner John E
• Bysick Scott E
• Howell Justin A

Classifications

• B65D83/38 Primary

  Details of the container body (pressure relief devices B65D83/70) · CPC title

• B65D83/44

  Valves specially adapted for the discharge of contents; Regulating devices (pressure relief devices B65D83/70) · CPC title

• B65D83/40 Primary

  Closure caps (actuator caps B65D83/20) · CPC title

• B65D51/1644

  the element being a valve (B65D51/1661 takes precedence) · CPC title

• B29C49/0005

  characterised by the material · CPC title