Enhanced leak detection dye carrier

Details Enhanced leak detection dye carrier Enhanced leak detection dye carrier

2004-05-05

2009-06-30

Larkin, Daniel S (Department: 2856)

Measuring and testing

With fluid pressure

Leakage

C252S068000, C252S301190, C252S408100, C252S964000

Reexamination Certificate

active

07552623

ABSTRACT:
A leak detection dye carrier is formed using a two-stage process (53). In a first stage, the dye carrier (52) is saturated with a mixture (54) of a dye powder and an evaporable solvent, such as alcohol. The solvent is permitted to evaporate leaving dispersed dye solids (56) on the dye carrier (52). In a second stage, the dye carrier (52) and dispersed dye solids (56) are immersed in a wet bath (58). The method may be a hybrid of dry and wet systems of placing dye onto a substrate carrier in which the wet bath is a mixture of a dye and a solvent, such as a system lubricant. Alternatively, the immersion of the dye carrier in the second stage may be limited in duration to prevent the dye solids in the first stage from being dissolved.

REFERENCES:
patent: 5650563 (1997-07-01), Cooper et al.
patent: RE36951 (2000-11-01), Cooper et al.

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