Test apparatus and method for examining sheet-like...

Details Test apparatus and method for examining sheet-like... Test apparatus and method for examining sheet-like...

2008-01-29

2008-01-29

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

Inspection of flaws or impurities

C356S437000

Reexamination Certificate

active

11192448

ABSTRACT:
A test apparatus (1) is provided for examining sheet-like components (8), in particular membrane electrode assemblies for use in a fuel cell, at least in sections and preferably continuously, for perforations (7), which apparatus includes means (9) for applying a test gas (6) to one side of the sheet-like component, means (2) for emitting electromagnetic radiation (12) in a wavelength region adapted to the test gas (6), which means are arranged on that side (11) of the sheet-like component (8) which is remote from the test gas (6), and means (3, 4, 5) for detecting any electromagnetic radiation (12) which has been absorbed by the test gas (6) in a characteristic wavelength region, and a method for carrying out an examination of this type.

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patent: 4745276 (1988-05-01), Broicher et al.
patent: 5956138 (1999-09-01), Slater
patent: 2002/0071122 (2002-06-01), Kulp et al.
patent: 196 23 544 (1997-12-01), None
patent: 697 04 571 (2001-10-01), None
patent: 0 947 018 (1999-10-01), None
patent: 63214637 (1988-09-01), None
patent: 63214637 (1988-09-01), None

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