Patent ID: 6016647
Filing Date: 2000-01-25
Classification: B60C,D07B

Abstract:
A method for using a bunching type twisting machine to manufacture a steel cord whose cross-sectional shape forms an elliptical shape having a substantially constant orientation in the cord length direction made up of one core filament having a continuous wave of a shorter pitch than the cord twist pitch and n (n=5 to 8) sheath filaments disposed around the core filament, comprising the following steps:i) preforming a helical continuous wavy form in a core filament and then squashing this to form a flat helical core filament at a stage before it is twisted together with sheath filaments;ii) making an intermediate product cord by twisting n sheath filaments around the flat helical core filament; andiii) squashing and thereby flattening and then taking up the intermediate product cord.