Brush manufacturing method and brush

Abstract

A plurality of bristle and core wire combination bodies each comprising a bristle of resilient wire formed into the shape of coil and a core wire of metal passed through the loops of the bristle are formed. The same number of other core wires of metal as the combination bodies are prepared. A core wire assembly is formed by twisting alternately the core wires of said combination bodies and the other core wires. A twisted wire body is formed by twisting the core wire assembly continuously in the longitudinal direction, in which a large number of loops of the bristles are arranged in a spiral shape in the longitudinal direction along the twist of the core wires. A plurality of rows of spiral brush bristles are formed by cutting the loops of the bristles of the twisted wire body.

1 . A method for manufacturing a brush having a plurality of rows of brush bristles arranged, between a plurality of metal core wires twisted continuously in the longitudinal direction, in spiral along the twist of the core wires, characterized in comprising the steps of
 forming a plurality of bristle and core wire combination bodies each comprising a bristle of resilient wire formed into the shape of coil and a core wire of metal passed through the loops of the bristle;   preparing the same number of other core wires of metal as said combination bodies;   forming a core wire assembly by approaching the core wires of said combination bodies and said other core wires and placing in the direction of rotation of twisting alternately to thereby isolate the bristles between different combination bodies by the other core wires; and   twisting said core wire assembly continuously in the longitudinal direction, to thereby form a brush having a plurality of rows of loop-shaped brush bristles arranged in spiral.   
     
     
         2 . The method for manufacturing a brush according to  claim 1 , further comprising a step of:
 cutting the formed loops of said bristles after entire processes claimed in  claim 1 , to thereby form a brush having brush bristles extending radially curbed in substantially perpendicular direction with respect to the core wire.   
     
     
         3 . The method for manufacturing a brush according to  claim 1 ,
 wherein said core wire assembly is formed by alternately arranging two said combination bodies and two said other core wires in the direction of rotation of the twisting.   
     
     
         4 . The method for manufacturing a brush according to  claim 1 ,
 wherein said core wire assembly is formed by alternately arranging three said combination bodies and three said other core wires in the direction of rotation of the twisting.   
     
     
         5 . A brush manufactured by the method according to  claim 1 . 
     
     
         6 . A brush having a row of brush bristles arranged, between a plurality of core wires of metal twisted continuously in the longitudinal direction, in spiral along the twisting of the core wires, wherein said brush bristles are curved, and extending radially in substantially perpendicular direction with respect to said core wires, wherein,
 said plurality of core wires of metal comprising the core wires of metal of the bristle and core wire combination body claimed in  claim 1 , and the same number of other core wires of metal as said core wire.