Unlock instant, AI-driven research and patent intelligence for your innovation.

Measurement of a density increase in a foil chamber

A technology of gas density and measurement unit, which is applied in the direction of fluid tightness test, measuring device, liquid tightness measurement using liquid/vacuum degree, etc. It can solve problems such as temperature change, gas cooling, and temperature rise of leaking gas

Active Publication Date: 2017-05-10
INFICON INC
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the heated packaging material may cause a temperature change compared to the temperature inside the test chamber, so that escaping leakage gases cause a temperature increase
On the other hand, the air pressure drop in the test chamber will cause the gas inside the test chamber to be cooled

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Measurement of a density increase in a foil chamber
  • Measurement of a density increase in a foil chamber
  • Measurement of a density increase in a foil chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] In all exemplary embodiments, the test chamber 10 is a membrane chamber having an upper membrane layer 12 and a lower membrane layer 14 . The two film layers 12 , 14 are placed around the sample 16 and are placed on top of each other in regions outside the sample 16 . Between the film layers 12 , 14 and in their boundary region outside the sample, a sealing ring 18 is inserted for gas-tight closing of the test chamber 10 . The sealing ring 18 is only used to describe the principle of gas-tight sealing of the film layers 12 , 14 in the boundary region of the film layers 12 , 14 . As an alternative to the sealing ring, a double seal can also be used.

[0015] By evacuating the test chamber 10 until the film layers 12, 14 are completely against the sample 16, the volume of the test chamber inside the test chamber 10 in the area outside the sample 16 20 is reduced. Evacuation, ie the reduction of the pressure inside the test chamber 10 , is performed by means of a vacuum...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for leakage testing a specimen (16) in a test chamber (10) at least one section of whose wall consists of a flexible material, the specimen being introduced into the test chamber, and the test chamber subsequently being evacuated, said method being characterised in that the leakage test is implemented by measuring the gas density inside the test chamber (10), in the region outside of said specimen (16).

Description

technical field [0001] The present invention relates to a method of performing an airtight test on a sample in a test chamber having at least one flexible wall portion. Background technique [0002] After the specimen is placed in the test chamber, such test chambers are evacuated so that their flexible walls are partially pressed against the specimen in order to reduce the test volume in areas outside the specimen. The remaining residual volume of the cavity. The chamber walls of the test chamber may for example be entirely made of a flexible film. Such test chambers are membrane chambers. [0003] The sample may be a packaging bag, such as a food packaging bag. The sample is placed into the test chamber, which is then hermetically sealed and evacuated. The term "evacuated" here does not mean an absolute vacuum, but a pressure drop to a pressure below the atmospheric pressure in the atmosphere surrounding the test chamber. [0004] According to German patent DE10200502...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32
CPCG01M3/3209G01M3/3281G01N21/3504G01N2021/0364G01N2021/6482G01N2021/651G01M3/3218G01N21/49G01N21/64G01N21/65
Inventor 丹尼尔·维茨格德克尔·西尔维奥
Owner INFICON INC