STRUCTURE OF SINKER FOR ESCAPING FROM SNAGGING

摘要

PROBLEM TO BE SOLVED: To provide an economic sinker gentle to the environment by remarkably reducing snagging of the sinker and to impart an additional value to an iron sinker to promote replacement of material of sinkers from lead which is considered to be a harmful material, to iron which carries out a spontaneous decomposition rapidly.;SOLUTION: The sinker structure comprises more than one spherical metal sinkers arranged in a line according to the purpose of use in a step wise, an elastic synthetic rubber covering all the sinkers and a lubricant inserted inside. The purpose of the insertion of the lubricant is to reduce the elasticity and internal friction and enable transfer and rotation of the spherical sinkers and this structure reduces the friction force of the contact point of snagging and enabling escape from the snagging by the elasticity of the total sinkers.;COPYRIGHT: (C)2004,JPO