Method of sealing the orifice of a metal tube

Abstract

A method of sealing the orifice of a metal tube by: rotating the metal tube to be sealed and using a heat source to soften the orifice of the metal tube to be sealed, and then using a mold to mold the softened material of the metal tube, enabling an end wall, which can have any of a variety of shapes, to be formed integral with the metal tube to seal the orifice.

What the invention claimed is:  
     
         1 . A method of sealing the orifice of a metal tube comprising the steps of: 
 (1) rotating the metal tube to be sealed;    (2) using a heat source to soften the orifice of the metal tube to be sealed;    (3) using a mold to mold the softened material of the metal tube, enabling an end wall to be formed integral with the metal tube to seal the orifice.    
     
     
         2 . The method of    claim 1    wherein said end wall has a conical shape.  
     
     
         3 . The method of    claim 1    wherein said end wall smoothly curves outwards.  
     
     
         4 . The method of    claim 1    wherein said end wall is a planar wall.  
     
     
         5 . The method of    claim 1    wherein said end wall is molded by said mold into a rod member.  
     
     
         6 . The method of    claim 5    wherein said rod member has an outer thread.  
     
     
         7 . The method of    claim 5    wherein said rod member has a rounded head.  
     
     
         8 . The method of    claim 5    wherein said rod member has a neck.