Dye leak detection method

Details Dye leak detection method Dye leak detection method

1980-10-06

1983-05-10

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

73 455, 2504591, G01N 2190

Patent

active

043826792

ABSTRACT:
An improved method for testing the integrity of containers and closures for same is disclosed which is simple, easy to perform, and possesses a high degree of sensitivity. The method comprises immersing a container (whose walls are substantially transparent and in which a substantially transparent liquid is stored) into a solution of a dye under conditions which will favor the passage of the dye through any leaks present in the container or closure and into the liquid. The container is then placed in the path of a laser beam emitting a wavelength which approximates the fluorescent excitation frequency of the dye. If the color of the beam transmitted through the liquid is that which is characteristic for the fluorescing dye, a leak in the system is indicated.

REFERENCES:
patent: 2472522 (1949-06-01), deForest
patent: 2479743 (1949-08-01), Hall et al.
patent: 4300689 (1981-11-01), Franklin et al.

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