Method for making bi-metallic members

Abstract

A method of making a colored anodized aluminum inner core for making a bi-metallic member, such as a coin or a medal having a metallic outer ring member consists in a first step of anodizing the inner core with a coloring agent so as to create an anodized portion. Once anodized, the inner core is inserted into an inner hollow section of the outer ring member so as to make the bi-metallic member. Once the bi-metallic member is created, it is stamped with an engraving image into a coin, token, or medal.

1 . A method of making bi-metallic members comprising the steps of:
 a. providing a metallic outer ring member having an inner hollow section;   b. providing a metallic inner core member shaped to fit within said inner hollow section of said metallic outer ring member;   c. anodizing said metallic inner core member with a coloring agent, thereby forming an anodized portion;   d. inserting said metallic inner core member into said inner hollow section of said metallic outer ring member to form said bi-metallic member;   e. stamping said bi-metallic member to thereby hold said metallic inner core member and said metallic outer ring member together.   
     
     
         2 . The method of  claim 1 , wherein said step of stamping said bi-metallic member further includes providing an engraved image upon the surfaces of said metallic inner core member and said metallic outer ring member, to thereby provide an identifying image upon said bi-metallic member which can then be used as a monetary coin. 
     
     
         3 . The method of  claim 1 , wherein said metallic outer ring member is formed from a metallic material chosen from a list of metallic materials comprising, but not limited to aluminum, steel, iron, copper, nickel, zinc, gold, silver, and platinum. 
     
     
         4 . The method of  claim 1 , wherein said metallic inner core member is formed from a non-ferrous metal chosen from a list comprising but not limited to aluminum, zinc, niobium, and platinum. 
     
     
         5 . The method of  claim 1 , wherein said shape of said inner hollow section of said metallic outer ring member is formed as a cylindrical volume. 
     
     
         6 . The method of  claim 1 , wherein said shape of said metallic inner core member is formed as a cylindrical volume. 
     
     
         7 . The method of  claim 1 , wherein the anodizing process is type III.