In an exhaust purifying device for an internal combustion engine, a honeycomb core is constituted by a single webbing which is implemented as foil of stainless steel. The webbing is made up of a flat portion and a corrugated portion adjoining each other in the longitudinal direction of the webbing. The...http://www.google.co.uk/patents/US5302355?utm_source=gb-gplus-sharePatent US5302355 - Exhaust purifying device and method of producing the same
