Abstract: A core wire of a guide wire has a plurality of twisted thin threads, a distal end of the core wire being diametrically reduced to be a thinnest tip, which has twisted ends united together. A resin layer is coated on the outer surface of the core wire. The thinnest tip of the leading end of the core wire is squelched into a flat-shaped configuration so as to form a flat portion. The flat portion is shaped into a multiple-stepped structure in which the thickness of the flat portion is progressively reduced by three steps or more in approaching the distal end of the core wire.

Abstract: In a guide wire is for a catheter, a core wire prepared by twisting a plurality of thin threads in which a leading end of the core wire is diametrically reduced to be a thinnest tip. A resin layer is coated on an outer surface of the core wire. The thinnest tip is treated by tightly uniting together a twisted ends of the thinnest threads.

Abstract: A driving rope for use with the printing head carriage of a word processor, a plotter or other compact equipment. The driving rope generally comprises a core rope and a thread formation of resin disposed thereon. Unlike a conventional timing belt, this driving rope is deformable for easy routing and yet assures a positive and accurate shift of the carriage.