Abstract: Apparatus for applying a coating of a slurry of a powdered solder material and a binder to the inner surface of a hollow metal cylinder. The apparatus includes solder material coating device including a coating nozzle which may be moved between a coating position within the interior of the hollow metal cylinder and a non-coating position; a guide for guiding and transporting a hollow metal cylinder towards the nozzle; means for rotating and supporting the hollow metal cylinder when the nozzle is in the coating position. The solder coated metal cylinder is used, for example, to provide an exhaust gas cleaning metal carrier in which a metal honey inner core is inserted into and soldered by the solder slurry applied to the hollow metal cylinder.

Abstract: A metal carrier and a production method thereof for carrying an exhaust gas cleaning catalyst for automobiles, autobicycles, and industrial equipment. The metal carrier includes a metal honeycomb core body pressed into a metal outer cylinder, and the joined portion of the a flat plate and a corrugated plate forming the metal honeycomb core body includes a solder material coated in spots or stripes at peaks of corrugation of the corrugated plate. The solder material in the joined portion of the flat plate and the corrugated plate has a thickness of less than 100 .mu.m, the positions of the joined portions are different between the surface and backside of the flat plate and corrugated plate, and the joined portions are present through an unjoined area having a length of more than 5% of the length of the metal honeycomb core body from an end face of the metal honeycomb core body at the exhaust gas inlet side.

Abstract: A method for producing a metal catalyst carrier for cleaning automobile exhaust gases is disclosed. A core having a honeycomb cross-section is inserted into an outer cylinder having an inner diameter nearly equal to that of the outer diameter of the core, by expanding one end of the outer cylinder, pressing the core into the expanded cylinder and heating the assembly to restore the shape of the expanded end. Alternatively, the core is formed by winding a foil solder around its periphery and then contracting and inserting the core into the outer cylinder.

Abstract: A plurality of discrete small cooling surfaces are arrayed on the surface of a movably received heat extracting member in both the axial and rotational directions. The discrete small cooling surfaces are formed by a plurality of one set of parallel grooves formed obliquely to and between the two axial ends of the heat extracting member and are crossed by a plurality of another set of parallel grooves formed in a similar manner but in different direction. An opening of a nozzle is directed toward the outer peripheral surface of the heat extracting member. A continuing stream of molten material is projected upon the discrete small cooling surfaces of the rotating heat extracting member such that the heat of the molten material is extracted by each of the discrete small cooling surface to solidify the molten material into flake particles. Accordingly, the molten material can be applied concurrently onto a plurality of discrete small cooling surfaces.