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1. 发明授权

US3951012A Process for making a file and article resulting therefrom 失效
标题翻译：制作文件和由此产生的文章的过程
公开(公告)号：US3951012A
公开(公告)日：1976-04-20
申请号：US541627
申请日：1975-01-16
申请人： Edward W. Staley, Jr.
发明人： Edward W. Staley, Jr.
IPC分类号： B23D73/06 , B23D73/12 , B24C1/02 , B24C11/00 , B23D71/00
CPC分类号： B24C1/086 , B23D73/12 , B24C1/02 , B24C11/00 , Y10T407/18
摘要： A process for making a file wherein the formation of the file teeth by striking a blank with a chisel-like bit also forms sharp serrations on the back sides of the teeth adjacent the cutting edge, with the improvement of preserving such serrations without substantial removal thereof during the cleaning and finishing steps of such file making process. Such process may include cleaning a formed and hardened file by directing a pressurized stream of frangible glass beads at the file to remove undesired materials associated with the hardening step. The file resulting from such process retains the serrations on the back sides of the teeth whereby wearing away of the original cutting edges of teeth during use serves to expose for cutting purposes some of the sharp serrations.
摘要翻译：用于制造文件的方法，其中通过用凿状钻头打毛坯形成文件齿也在邻近切割边缘的齿的背面上形成锐利的锯齿，同时改进了保持这种锯齿，而不会基本上移除在这样的文件制作过程的清洁和整理步骤。这种方法可以包括通过将易碎玻璃珠的加压流引导到文件中以去除与硬化步骤相关联的不期望的材料来清洁形成和硬化的文件。由这种过程产生的文件保留了齿的后侧上的锯齿，从而在使用过程中磨损了原始的切割刃，用于为了切割目的而露出一些尖锐的锯齿。

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