Metal support for exhaust gas purifying catalyst
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United States of America Patent
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Dec 31, 2002
Issued Date -
N/A
app pub date -
Dec 23, 1998
filing date -
Jan 8, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cylindrical honeycomb structure formed by spirally winding a strip metal flat sheet and a strip metal corrugated sheet overlapped thereon. The metal flat sheet is welded, at each turn, to the metal corrugated sheet at a plurality of axially arranged welding positions on each portion where the metal flat sheet contacts the metal corrugated sheet. Letting L be the axial length of the honeycomb structure and D be the diameter of the honeycomb structure, the maximum value L.sub.1 of distances between adjacent welding positions satisfies at least one of relationships given by L.sub.1.ltoreq./D/2 and L.sub.1.ltoreq./L/2, or the distance L.sub.2 between the outermost welding positions in the axial direction of the honeycomb structure and the outer end face of the honeycomb structure satisfies at least one of relationship given by L.sub.2.ltoreq./D/20 and L.sub.2.ltoreq./L/10.
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