Leak test method and device
AssigneeDaimlerChrysler AG
InventorsHardy Buerkle, Peter Haag, Claus Loercher, Ruediger Nebelsiek
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Abstract
A method and a device for testing whether planar material, in particular films, are leakproof. The planar material is continuously conveyed in a continuous process through a test chamber which has a test gas chamber on one side of the planar material and a measuring chamber on the other side of the planar material. The test gas chamber side is subjected to a test gas with a predefinable test pressure, and the presence of test gas on the measuring chamber side is detected.
Claims21
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A method for testing planar material for leakage comprising:
- continuously conveying the planar material through a test chamber having a test gas chamber on one side of the planar material and a measuring chamber on the other side of the planar material, subjecting the planar material to a test gas with a predefinable test pressure on the test gas chamber side, sealing at least one of the test gas chamber and the measuring chamber at at least one of a test chamber inlet duct and a test chamber outlet duct for the planar material by a gas curtain having a gas pressure higher than a gas pressure in at least one of the test gas chamber and the measuring chamber;
- and
- detecting the presence of test gas on the measuring chamber side.
A device for testing planar material for leakage comprising:
- a test chamber having a test chamber inlet duct and a test chamber outlet duct for the planar material;
- conveying device for continuously conveying the planar material through the test chamber, wherein said test chamber further includes a test gas chamber and a measuring chamber on opposite sides of introduced planar material, with at least one of the measuring chamber and the test gas chamber having an open-pore material which, on a side facing away from the planar material, has a planar surface extending from the test chamber inlet duct to the test chamber outlet duct;
- a supply unit supplying the test gas;
- and
- a test gas sensor system in communication with the measuring chamber.
Dependencies are inferred from the claim text.