Process for the manufacture of brushes

A process for the continuous manufacture of tooth brushes comprising a bristle or pile carrying head and a handle integral with said head, said process comprising:

• drawing substantially parallel and continuous monofilament or polyfilament yarns from supply means in a substantially vertical direction so as to entirely cross at least one mold cavity having the shape of two of said brush handles and heads placed back to back so as to project outside two opposite sides of said mold in a direction substantially perpendicular to said mold cavity at a part of said cavity having said shape of two brush heads placed back to back;
• injecting a synthetic liquid or pasty thermoplastic or thermohardening material into said mold cavity so as to cause said parts of said parallel yarns crossing said mold cavity to be embedded into said synthetic material, to thereby form molded double brush blanks placed back to back having said yarns protruding from said two opposite sides;
• removing said double brush blanks after said synthetic material has been at least sufficiently hardened in said mold cavity to maintain its molded shape;
• dividing said molded double brush blanks into individual brush blanks by cutting them along the longitudinal axis of said double brush blanks;
• and
• cutting said projecting yarns of each individual brush blank at a desired length so as to obtain completed individual brushes.