Leakage testing device for attachment to a flexible wall of an item to be tested

Patent metadata

Field	Value
Publication number	US-10352815-B2
Application number	US-201314436191-A
Country	US
Kind code	B2
Filing date	Oct 2, 2013
Priority date	Oct 18, 2012
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

An improved leakage testing device for attachment to a flexible wall of an item to be tested is provided with a film (4) that limits a hollow chamber (1) on the outer side of the item to be tested and with a leakage (2), said film (4) being designed to adhere to the item to be tested.

First claim

The invention claimed is:

1. A test leak device for attachment to a flexible wall of an item to be tested, comprising:
a first film which defines a cavity on the outer side of the item to be tested, and is provided with a hole configured to simulate a gas leak in the flexible wall of the item to be tested for gas leakage; and
a second film, wherein the second film comprises an adhesive and is designed to be stuck onto the item to be tested, wherein the first film lies on the second film, wherein the second film is fixedly joined to an end portion of the first film, wherein the end portion of the first film entirely surrounds a center portion of the second film, wherein the center portion of the second film is not joined to the first film, the first film thereby forming a cavity together with the second film, wherein except for the hole, the cavity is encapsulated, enclosed, and defined entirely by the center portion and the first film.

2. The test leak device of claim 1 , wherein a reinforcing element is enclosed within the cavity, which element spaces the first film from the second film in the area of the cavity.

3. The test leak device of claim 1 , wherein the cavity is encapsulated by the first and second films prior to attachment of the test leak device to the flexible wall.

4. A method for testing or calibrating a leak test system with which items are to be tested for tightness, the method comprising:
filing a cavity of a test leak device with a test gas, wherein the test leak device comprises:
a first film which defines the cavity on the outer side of the item to be tested, and is provided with a hole configured to simulate a gas leak in a flexible wall of the item to be tested for gas leakage; and
a second film, wherein the second film comprises an adhesive and is designed to be stuck onto the item to be tested, wherein the first film lies on the second film, wherein the second film is fixedly joined to an end portion of the first film, wherein the end portion of the first film entirely surrounds a center portion of the second film, wherein the center portion of the second film is not joined to the first film, the first film thereby forming a cavity together with the second film, wherein except for the hole, the cavity is encapsulated, enclosed, and defined entirely by the center portion and the first film;

attaching the test leak device to the flexible wall of the item to be tested for the gas leakage;
escaping the test gas contained within the cavity through the hole at a predetermined leakage rate; and
measuring the escaping test gas with the leak test system.

Assignees

• Inficon Gmbh

Inventors

• Decker Silvio

Classifications

• G01M3/227

  for flexible or elastic containers · CPC title

• G01M3/027 Primary

  Details with respect to the testing of elastic elements, e.g. gloves, condoms · CPC title

• G01M3/3218 Primary

  for flexible or elastic containers · CPC title

• G01M3/007

  Leak detector calibration, standard leaks (G01M3/207 takes precedence) · CPC title