Abstract: 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".

Abstract: A brazeable aluminum material is composed of an aluminum core and a brazing agent layer consisting of a brazing agent thermally sprayed onto covering a surface of the core. A number of unmolten minute particles of the brazing agent are present in the brazing agent layer, which contains at least an aluminum-silicon alloy and/or a mixture of aluminum and silicon. Characteristic features of a method of producing the brazeable aluminum material are the steps of: preparing a powder composed of minute particles; and thermally spraying the powder onto the aluminum core in such a state that only a surface of each minute particle is molten, with a pith of the particle remaining unmolten. The powder is an Al-Si alloy and/or a mixture of Al powder and Si powder.

Abstract: A brazeable aluminum material is composed of an aluminum core and a brazing agent layer consisting of a brazing agent thermally sprayed onto and covering a surface of the core. A number of unmolten minute particles of the brazing agent are present in the brazing agent layer, which contains at least an aluminum-silicon alloy and/or a mixture of aluminum and silicon. Characteristic features of a method of producing the brazeable aluminum material are the steps of: preparing a powder composed of minute particles; and thermally spraying the powder onto the aluminum core in such a state that only a surface of each minute particle is molten, with a pith of the particle remaining unmolten. The powder is an Al-Si alloy and/or a mixture of Al powder and Si powder.