초록 ▼

Multiple strands of metal slit from strip which varies in thickness from edge to center are separately coiled on the same mandrel into uniformly tight coils by selectively working the strands so as to reduce the thickness and elongate thicker strands more than thinner strands. The working is prefera

Multiple strands of metal slit from strip which varies in thickness from edge to center are separately coiled on the same mandrel into uniformly tight coils by selectively working the strands so as to reduce the thickness and elongate thicker strands more than thinner strands. The working is preferably accomplished by imparting reverse bends to the strands while tensioning them in amounts less than the tensile yield strength of the metal.

대표청구항 ▼

The method of coiling into uniformly tight coils multiple metal strands slit from strip varying in thickness from edge to center comprising working the multiple strands selectively by reverse bending between the same rolls, so as to reduce and elongate the thicker strands more than the thinner stran

The method of coiling into uniformly tight coils multiple metal strands slit from strip varying in thickness from edge to center comprising working the multiple strands selectively by reverse bending between the same rolls, so as to reduce and elongate the thicker strands more than the thinner strands and then coiling the strands in multiple at the same rotational speed.