Disposition of solder for heat resistant structure

Abstract

The present invention provides a solder disposed configuration for a heat resistant structure for forming a catalytic converter for purifying the exhaust gas in an engine. The heat resistant structure is composed of a honeycomb structure fitted and fixed into a hollow cylindrical shell. And the honeycomb structure comprises at least a substrate having a flat sheet and a corrugated sheet. A first and a second strip of solder are disposed alongside a first and a second edge paralleling to each other on a first and a second plane surface of the substrate respectively, wherein the second plane surface is the reverse side of the first plane surface of the substrate, and the first and second edge are opposite to each other on the first and the second plane surface respectively for forming the honeycomb structure. Rolling up the substrate to form the honeycomb structure (e.g. spirally wound-form) by the solder disposed on the substrate welded and joined together. Thereafter, heat them with high temperature and under vacuum condition to weld the solders for joining and fixing each other to form the heat resistant structure.

Dependencies are inferred from the claim text.