Patent ID: 7174634
Filing Date: 2007-02-13
Classification: B21D,F01N,Y10T

Abstract:
1. A method for producing a fluid treatment device having a honeycomb member in a metallic cylindrical housing with a shock absorbent member wrapped around the honeycomb member, comprising: inserting the honeycomb member with the shock absorbent member wrapped around the honeycomb member into the cylindrical housing; forming a necking portion on at least one end portion of the cylindrical housing, with a body portion thereof being clamped; and reducing a diameter of at least a part of the cylindrical housing with the shock absorbent member received therein, to reduce an outer diameter of the shock absorbent member, to such an extent that a desired inner diameter of the part of the cylindrical housing is provided enough to cause the shock absorbent member to produce a desired holding pressure for holding the honeycomb member in the cylindrical housing solely by the shock absorbent member, wherein the desired inner diameter of the cylindrical housing is provided based on a monitored axial load applied to the honeycomb member after the honeycomb member having the wrapped shock absorbent member is inserted into the cylindrical housing.