公开(公告)号：US4335295A

公开(公告)日：1982-06-15

申请号：US37341

申请日：1979-05-09

Applicant: Gary J. Fowler

Inventor： Gary J. Fowler

IPC: B23B31/00 ,  B41M3/14 ,  B41M5/26 ,  B44B7/00 ,  B23K27/00

CPC classification number: B44B7/00 ,  B23B31/005 ,  B41M3/14 ,  B41M5/262 ,  B23B2231/0248 ,  B23B2260/092 ,  B23K2201/007 ,  B23K2201/20

Abstract: The present invention is a method of marking a metal device with an identification symbol or a serial number which is not detectable by a visual examination. The method of marking includes the steps of locally heating a specified area of the metal so that its microstructure is altered. For example, a laser, the intensity of which has been adjusted so as to maintain a designated area at a temperature within an appropriate temperature range for the particular metal, may be used to trace out either an identification symbol or serial number. The method is used in combination with the step of etching away the surface area of the metal device which includes both unaltered microstructure and altered microstructure with a selected chemical etching solution that will etch away the altered microstructure at a different rate than the unaltered microstructure thereby exposing the mark.

Abstract translation: 本发明是一种用目视检查不能检测出的具有识别符号或序列号的金属器件的标记方法。 标记方法包括对金属的特定区域进行局部加热以改变其微结构的步骤。 例如，已经调整其强度以将指定区域保持在针对特定金属的适当温度范围内的温度的激光器可以用于追踪识别符号或序列号。 该方法与通过选择的化学蚀刻溶液蚀刻除去未改变的微结构和改变的微结构的金属器件的表面积的步骤结合使用，其将以与未改变的微结构不同的速率蚀刻掉改变的微结构，从而暴露 标记。