| 摘要 |
A DOUBLE-WALLED HOUSING, IN PARTICULAR FOR EXHAUST GAS CATALYSTS OF MOTOR VEHICLES, HAVING AN INNER JACKET, AND AN OUTER JACKET THAT APPROXIMATELY CONCENTRICALLY SURROUNDS THE INNER JACKET SPACED APART FROM IT, WHEREIN THE INNER JACKET AND THE OUTER JACKET REST TIGHTLY AGAINST ONE ANOTHER AT BOTH FACE ENDS, THE INNER JACKET AT LEAST AT TWO END REGIONS IS KEPT UNDER COMPRESSIVE STRAIN BY CONSTRICTIONS OF THE OUTER JACKET, AND THE OUTER JACKET IS PROVIDED WITH EMBOSSED FEATURES ORIENTED TOWARD INNER JACKET. SUCH A HOUSING IS PRODUCED IN THAT THE INNER JACKET IS CHANGED, BY ROLLING OF A METAL SHEET, INTO CYLINDRICAL OR CONICAL FORM WHILE MAINTAINING A PARTING LINE, THE OUTER JACKET IS CHANGED, BY ROLLING OF A METAL SHEET, INTO CYLINDRICAL OR CONICAL FORM, AND BY CONNECTING THE EDGES MEETING ONE ANOTHER BY JOINING TECHNIQUE, THE INNER JACKET IS DISPOSED IN THE OUTER JACKET, AND THE OUTER JACKET ON BOTH FACE ENDS IS PLASTICALLY DEFORMED INWARD OVER ITS ENTIRE CIRCUMFERENCE IN SUCH A WAY THAT THE INNER JACKET IS KEPT UNDER COMPRESSIVE STRAIN, AND THE OTHER JACKET IS PROVIDED BEFOREHAND OR SIMULTANEOUSLY WITH EMBOSSED FEATURES ORIENTED TOWARD THE INNER JACKET.
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