Method for imparting resistance to axial displacement of convolu

Details Method for imparting resistance to axial displacement of convolu Method for imparting resistance to axial displacement of convolu

1982-05-24

1984-02-21

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Specified support particles of peculiar structure or...

Specified cross-section shape or area of elongated support...

B01J 3504

Patent

active

044330642

ABSTRACT:
A method for imparting resistance to axial displacement of convolutions in a convoluted substrate of the type comprising spirally wound superimposed plain and corrugated strips of metal which are suitable for use in supporting a catalyst in a catalyst unit in which the substrate is washcoated with a layer of refractory metal oxide and is useful for the purification of exhaust gases, especially exhaust gases from a motor vehicle. The method comprises making one or more weld runs across an end face of the substrate so as to weld together the plain and corrugated strips at points where they are contiguous. Even though only a minority of such points of contiguity are welded, the substrate becomes adequately resistant to axial displacing forces generated by exhaust gases passing through the substrate. The substrate may be washcoated prior to making the weld runs.

REFERENCES:
patent: 3920583 (1975-11-01), Pugh
patent: 4186172 (1980-01-01), Scholz
patent: 4220625 (1980-09-01), Toh et al.
patent: 4282186 (1981-08-01), Nonnenmann et al.
patent: 4316823 (1982-02-01), Bozon et al.

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