METAL CARRIER FOR WASTE GAS CLEANING HAVING HIGH REACTION EFFICIENCY AND MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a metal carrier structure and a method of its manufacture excellent in reaction efficiency and cleaning characteristics at the time of starting an engine and superior in productivity. SOLUTION: A metal carrier 1 for cleaning waste gas wherein a metal flat foil 2 having a large number of protrusions 3 and holes 4 is wound in a spiral state to form a cylinder and a gap between neighboring foil of the spiral cylinder is connected with each other by the protrusions 3 in such a manner as to keep a clearance, and a gas is allowed to pass through the cylinder via the clearance is provided. For efficiency of production, the holes are made by punching the metal flat foil 2 and at the same time small pieces of the flat foil corresponding to the holes 4 or part of them are not wholly cut from the foil 2 but are deformed in the state of being connected so as to form the protrusions 3.