发明名称 MANUFACTURE OF NEEDLE AND DECORATIVE ARTICLE USING THE SAME
摘要 PROBLEM TO BE SOLVED: To provide a method for fabricating needles which have high strength and fine external appearances, and to provide decorative articles using the needles fabricated by the same method. SOLUTION: The method for fabricating needles for use in decorative articles comprises a step for forming a ball at an end of a bar material, a step floor compressing at least one portion of the ball to form it into a flat surface, and a step for forming a through hole in an area of the flat surface, wherein the thickness of the compressed portion of the ball is nearly equal to that of the bar material, and the material of the needle is composed of gold, silver, platinum, or alloys thereof, and further the ball is formed by a method wherein an end of the bar material is exposed from a jig and the end of the bar material is heated to a temperature equal to or higher than the melting point of the material.
申请公布号 JP2001120316(A) 申请公布日期 2001.05.08
申请号 JP19990300914 申请日期 1999.10.22
申请人 CITIZEN WATCH CO LTD;SHICHIZUN SHOJI KK 发明人 MAFUNE MASAO;KAZONO KAZUAKI
分类号 A44C27/00;B21F1/02;(IPC1-7):A44C27/00 主分类号 A44C27/00
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