Showa Aluminum Kabushiki Kaisha

Showa Aluminum Corporation

Wataru Ouchi

Toshinori Tokutake

Hirosaburo Hirano

Katsuhisa Suzuki

Taizo Morita

Shinya Tagawa

A continuous cutter for severing pieces of equal length from a coiled elongate article 'T' includes a movable stand which carries a shiftable clamp. The cutter also includes a fixed clamp. The shiftable and fixed clamps are driven relatively to one another to clamp or unclamp the article 'T' fed from an uncoiler and to advance it in an intermittent manner for the production of flat tubes used to construct a heat exchanger. For this purpose, a cutter blade on the movable stand severs the elongate article into lengths during the forward advance of the stand, in such a manner that the lengths are cut accurately, efficiently and at a reduced production cost. A stretcher may be added to the cutter in order to impart a the moving article 'T'.

Continuous cutter for severing pieces of equal length from a coiled

A tube for heat exchangers is a flat tube which either includes a pair of plane walls which are spaced a predetermined distance from one another, the plane walls respectively having one lateral ends integrally connected to each other by a U-shaped bent portion, the plane walls further having their other lateral ends which abut against to be tightly secured to one another, or alternatively, the flat tube includes as the plane walls a pair of preformed plates having the abutted and soldered portions at both lateral ends. The tube further includes one or more curved lugs integral with and protruding inwardly from an inner surface of each plane wall, and the curved lugs respectively having innermost tops so that the innermost tops protruding from one plane wall bear against the inner surface of the other plane wall or against the innermost tops of the other curved lugs protruding from said other plane wall. The tube is thus of an improved pressure resistance despite its minimized height or thickness, and the manufacturing process of the tube involves no difficulty to produce the tubes at a high productivity and lower manufacturing cost.

Tube for heat exchangers and a method for manufacturing the tube

A tube for heat exchangers is a flat tube which either comprises a pair of plane walls which are spaced a predetermined distance from one another, the plane walls respectively having lateral ends integrally connected to each other by a U-shaped bent portion, the plane walls further having other lateral ends which abut against and are tightly secured to one another, or alternatively, the flat tube comprises a pair of preformed plates having abutted and soldered portions at both lateral ends. The tube further comprises one or more curved lugs integral with and protruding inwardly from an inner surface of each plane wall, and the curve lugs respectively have innermost tops so that the innermost tops protruding from one plane wall bear against the inner surface of the other plane wall or against the innermost tops of the other curved lugs protruding from said other plane wall. Th tube is thus of an improved pressure resistance despite its minimized height or thickness, and the manufacturing process of the tube permits the production of tubes at a high productivity and lower manufacturing cost.

Growing community of inventors

Shimodateshi, Japan

Wataru Ouchi